1599 lines
47 KiB
Go
1599 lines
47 KiB
Go
package cluster
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import (
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"encoding/json"
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"fmt"
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"sort"
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"github.com/sirupsen/logrus"
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appsv1 "k8s.io/api/apps/v1"
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v1 "k8s.io/api/core/v1"
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policybeta1 "k8s.io/api/policy/v1beta1"
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/apimachinery/pkg/util/intstr"
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acidv1 "github.com/zalando/postgres-operator/pkg/apis/acid.zalan.do/v1"
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"github.com/zalando/postgres-operator/pkg/spec"
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"github.com/zalando/postgres-operator/pkg/util"
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"github.com/zalando/postgres-operator/pkg/util/config"
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"github.com/zalando/postgres-operator/pkg/util/constants"
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batchv1 "k8s.io/api/batch/v1"
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batchv1beta1 "k8s.io/api/batch/v1beta1"
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"k8s.io/apimachinery/pkg/labels"
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)
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const (
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pgBinariesLocationTemplate = "/usr/lib/postgresql/%s/bin"
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patroniPGBinariesParameterName = "bin_dir"
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patroniPGParametersParameterName = "parameters"
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patroniPGHBAConfParameterName = "pg_hba"
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localHost = "127.0.0.1/32"
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)
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type pgUser struct {
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Password string `json:"password"`
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Options []string `json:"options"`
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}
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type patroniDCS struct {
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TTL uint32 `json:"ttl,omitempty"`
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LoopWait uint32 `json:"loop_wait,omitempty"`
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RetryTimeout uint32 `json:"retry_timeout,omitempty"`
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MaximumLagOnFailover float32 `json:"maximum_lag_on_failover,omitempty"`
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PGBootstrapConfiguration map[string]interface{} `json:"postgresql,omitempty"`
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Slots map[string]map[string]string `json:"slots,omitempty"`
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}
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type pgBootstrap struct {
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Initdb []interface{} `json:"initdb"`
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Users map[string]pgUser `json:"users"`
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DCS patroniDCS `json:"dcs,omitempty"`
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}
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type spiloConfiguration struct {
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PgLocalConfiguration map[string]interface{} `json:"postgresql"`
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Bootstrap pgBootstrap `json:"bootstrap"`
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}
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func (c *Cluster) containerName() string {
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return "postgres"
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}
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func (c *Cluster) statefulSetName() string {
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return c.Name
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}
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func (c *Cluster) endpointName(role PostgresRole) string {
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name := c.Name
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if role == Replica {
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name = name + "-repl"
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}
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return name
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}
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func (c *Cluster) serviceName(role PostgresRole) string {
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name := c.Name
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if role == Replica {
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name = name + "-repl"
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}
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return name
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}
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func (c *Cluster) podDisruptionBudgetName() string {
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return c.OpConfig.PDBNameFormat.Format("cluster", c.Name)
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}
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func (c *Cluster) makeDefaultResources() acidv1.Resources {
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config := c.OpConfig
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defaultRequests := acidv1.ResourceDescription{CPU: config.DefaultCPURequest, Memory: config.DefaultMemoryRequest}
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defaultLimits := acidv1.ResourceDescription{CPU: config.DefaultCPULimit, Memory: config.DefaultMemoryLimit}
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return acidv1.Resources{ResourceRequests: defaultRequests, ResourceLimits: defaultLimits}
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}
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func generateResourceRequirements(resources acidv1.Resources, defaultResources acidv1.Resources) (*v1.ResourceRequirements, error) {
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var err error
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specRequests := resources.ResourceRequests
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specLimits := resources.ResourceLimits
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result := v1.ResourceRequirements{}
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result.Requests, err = fillResourceList(specRequests, defaultResources.ResourceRequests)
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if err != nil {
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return nil, fmt.Errorf("could not fill resource requests: %v", err)
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}
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result.Limits, err = fillResourceList(specLimits, defaultResources.ResourceLimits)
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if err != nil {
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return nil, fmt.Errorf("could not fill resource limits: %v", err)
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}
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return &result, nil
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}
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func fillResourceList(spec acidv1.ResourceDescription, defaults acidv1.ResourceDescription) (v1.ResourceList, error) {
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var err error
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requests := v1.ResourceList{}
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if spec.CPU != "" {
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requests[v1.ResourceCPU], err = resource.ParseQuantity(spec.CPU)
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if err != nil {
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return nil, fmt.Errorf("could not parse CPU quantity: %v", err)
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}
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} else {
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requests[v1.ResourceCPU], err = resource.ParseQuantity(defaults.CPU)
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if err != nil {
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return nil, fmt.Errorf("could not parse default CPU quantity: %v", err)
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}
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}
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if spec.Memory != "" {
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requests[v1.ResourceMemory], err = resource.ParseQuantity(spec.Memory)
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if err != nil {
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return nil, fmt.Errorf("could not parse memory quantity: %v", err)
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}
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} else {
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requests[v1.ResourceMemory], err = resource.ParseQuantity(defaults.Memory)
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if err != nil {
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return nil, fmt.Errorf("could not parse default memory quantity: %v", err)
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}
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}
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return requests, nil
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}
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func generateSpiloJSONConfiguration(pg *acidv1.PostgresqlParam, patroni *acidv1.Patroni, pamRoleName string, logger *logrus.Entry) (string, error) {
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config := spiloConfiguration{}
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config.Bootstrap = pgBootstrap{}
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config.Bootstrap.Initdb = []interface{}{map[string]string{"auth-host": "md5"},
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map[string]string{"auth-local": "trust"}}
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initdbOptionNames := []string{}
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for k := range patroni.InitDB {
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initdbOptionNames = append(initdbOptionNames, k)
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}
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/* We need to sort the user-defined options to more easily compare the resulting specs */
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sort.Strings(initdbOptionNames)
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// Initdb parameters in the manifest take priority over the default ones
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// The whole type switch dance is caused by the ability to specify both
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// maps and normal string items in the array of initdb options. We need
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// both to convert the initial key-value to strings when necessary, and
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// to de-duplicate the options supplied.
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PatroniInitDBParams:
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for _, k := range initdbOptionNames {
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v := patroni.InitDB[k]
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for i, defaultParam := range config.Bootstrap.Initdb {
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switch defaultParam.(type) {
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case map[string]string:
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{
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for k1 := range defaultParam.(map[string]string) {
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if k1 == k {
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(config.Bootstrap.Initdb[i]).(map[string]string)[k] = v
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continue PatroniInitDBParams
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}
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}
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}
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case string:
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{
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/* if the option already occurs in the list */
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if defaultParam.(string) == v {
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continue PatroniInitDBParams
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}
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}
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default:
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logger.Warningf("unsupported type for initdb configuration item %s: %T", defaultParam, defaultParam)
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continue PatroniInitDBParams
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}
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}
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// The following options are known to have no parameters
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if v == "true" {
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switch k {
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case "data-checksums", "debug", "no-locale", "noclean", "nosync", "sync-only":
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config.Bootstrap.Initdb = append(config.Bootstrap.Initdb, k)
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continue
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}
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}
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config.Bootstrap.Initdb = append(config.Bootstrap.Initdb, map[string]string{k: v})
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}
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if patroni.MaximumLagOnFailover >= 0 {
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config.Bootstrap.DCS.MaximumLagOnFailover = patroni.MaximumLagOnFailover
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}
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if patroni.LoopWait != 0 {
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config.Bootstrap.DCS.LoopWait = patroni.LoopWait
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}
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if patroni.RetryTimeout != 0 {
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config.Bootstrap.DCS.RetryTimeout = patroni.RetryTimeout
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}
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if patroni.TTL != 0 {
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config.Bootstrap.DCS.TTL = patroni.TTL
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}
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if patroni.Slots != nil {
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config.Bootstrap.DCS.Slots = patroni.Slots
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}
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config.PgLocalConfiguration = make(map[string]interface{})
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config.PgLocalConfiguration[patroniPGBinariesParameterName] = fmt.Sprintf(pgBinariesLocationTemplate, pg.PgVersion)
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if len(pg.Parameters) > 0 {
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local, bootstrap := getLocalAndBoostrapPostgreSQLParameters(pg.Parameters)
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if len(local) > 0 {
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config.PgLocalConfiguration[patroniPGParametersParameterName] = local
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}
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if len(bootstrap) > 0 {
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config.Bootstrap.DCS.PGBootstrapConfiguration = make(map[string]interface{})
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config.Bootstrap.DCS.PGBootstrapConfiguration[patroniPGParametersParameterName] = bootstrap
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}
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}
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// Patroni gives us a choice of writing pg_hba.conf to either the bootstrap section or to the local postgresql one.
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// We choose the local one, because we need Patroni to change pg_hba.conf in PostgreSQL after the user changes the
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// relevant section in the manifest.
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if len(patroni.PgHba) > 0 {
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config.PgLocalConfiguration[patroniPGHBAConfParameterName] = patroni.PgHba
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}
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config.Bootstrap.Users = map[string]pgUser{
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pamRoleName: {
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Password: "",
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Options: []string{constants.RoleFlagCreateDB, constants.RoleFlagNoLogin},
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},
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}
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res, err := json.Marshal(config)
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return string(res), err
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}
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func getLocalAndBoostrapPostgreSQLParameters(parameters map[string]string) (local, bootstrap map[string]string) {
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local = make(map[string]string)
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bootstrap = make(map[string]string)
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for param, val := range parameters {
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if isBootstrapOnlyParameter(param) {
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bootstrap[param] = val
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} else {
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local[param] = val
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}
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}
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return
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}
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func nodeAffinity(nodeReadinessLabel map[string]string) *v1.Affinity {
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matchExpressions := make([]v1.NodeSelectorRequirement, 0)
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if len(nodeReadinessLabel) == 0 {
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return nil
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}
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for k, v := range nodeReadinessLabel {
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matchExpressions = append(matchExpressions, v1.NodeSelectorRequirement{
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Key: k,
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Operator: v1.NodeSelectorOpIn,
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Values: []string{v},
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})
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}
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return &v1.Affinity{
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NodeAffinity: &v1.NodeAffinity{
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RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{
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NodeSelectorTerms: []v1.NodeSelectorTerm{{MatchExpressions: matchExpressions}},
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},
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},
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}
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}
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func generatePodAffinity(labels labels.Set, topologyKey string, nodeAffinity *v1.Affinity) *v1.Affinity {
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// generate pod anti-affinity to avoid multiple pods of the same Postgres cluster in the same topology , e.g. node
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podAffinity := v1.Affinity{
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PodAntiAffinity: &v1.PodAntiAffinity{
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RequiredDuringSchedulingIgnoredDuringExecution: []v1.PodAffinityTerm{{
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LabelSelector: &metav1.LabelSelector{
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MatchLabels: labels,
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},
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TopologyKey: topologyKey,
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}},
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},
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}
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if nodeAffinity != nil && nodeAffinity.NodeAffinity != nil {
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podAffinity.NodeAffinity = nodeAffinity.NodeAffinity
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}
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return &podAffinity
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}
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func tolerations(tolerationsSpec *[]v1.Toleration, podToleration map[string]string) []v1.Toleration {
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// allow to override tolerations by postgresql manifest
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if len(*tolerationsSpec) > 0 {
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return *tolerationsSpec
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}
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if len(podToleration["key"]) > 0 || len(podToleration["operator"]) > 0 || len(podToleration["value"]) > 0 || len(podToleration["effect"]) > 0 {
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return []v1.Toleration{
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{
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Key: podToleration["key"],
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Operator: v1.TolerationOperator(podToleration["operator"]),
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Value: podToleration["value"],
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Effect: v1.TaintEffect(podToleration["effect"]),
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},
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}
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}
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return []v1.Toleration{}
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}
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// isBootstrapOnlyParameter checks against special Patroni bootstrap parameters.
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// Those parameters must go to the bootstrap/dcs/postgresql/parameters section.
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// See http://patroni.readthedocs.io/en/latest/dynamic_configuration.html.
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func isBootstrapOnlyParameter(param string) bool {
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return param == "max_connections" ||
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param == "max_locks_per_transaction" ||
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param == "max_worker_processes" ||
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param == "max_prepared_transactions" ||
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param == "wal_level" ||
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param == "wal_log_hints" ||
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param == "track_commit_timestamp"
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}
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func generateVolumeMounts(volume acidv1.Volume) []v1.VolumeMount {
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return []v1.VolumeMount{
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{
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Name: constants.DataVolumeName,
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MountPath: constants.PostgresDataMount, //TODO: fetch from manifest
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SubPath: volume.SubPath,
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},
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}
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}
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func generateContainer(
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name string,
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dockerImage *string,
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resourceRequirements *v1.ResourceRequirements,
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envVars []v1.EnvVar,
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volumeMounts []v1.VolumeMount,
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privilegedMode bool,
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) *v1.Container {
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return &v1.Container{
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Name: name,
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Image: *dockerImage,
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ImagePullPolicy: v1.PullIfNotPresent,
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Resources: *resourceRequirements,
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Ports: []v1.ContainerPort{
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{
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ContainerPort: 8008,
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Protocol: v1.ProtocolTCP,
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},
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{
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ContainerPort: 5432,
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Protocol: v1.ProtocolTCP,
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},
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{
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ContainerPort: 8080,
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Protocol: v1.ProtocolTCP,
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},
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},
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VolumeMounts: volumeMounts,
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Env: envVars,
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SecurityContext: &v1.SecurityContext{
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Privileged: &privilegedMode,
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ReadOnlyRootFilesystem: util.False(),
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},
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}
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}
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func generateSidecarContainers(sidecars []acidv1.Sidecar,
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volumeMounts []v1.VolumeMount, defaultResources acidv1.Resources,
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superUserName string, credentialsSecretName string, logger *logrus.Entry) ([]v1.Container, error) {
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if len(sidecars) > 0 {
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result := make([]v1.Container, 0)
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for index, sidecar := range sidecars {
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resources, err := generateResourceRequirements(
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makeResources(
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sidecar.Resources.ResourceRequests.CPU,
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sidecar.Resources.ResourceRequests.Memory,
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sidecar.Resources.ResourceLimits.CPU,
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sidecar.Resources.ResourceLimits.Memory,
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),
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defaultResources,
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)
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if err != nil {
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return nil, err
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}
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sc := getSidecarContainer(sidecar, index, volumeMounts, resources, superUserName, credentialsSecretName, logger)
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result = append(result, *sc)
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}
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return result, nil
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}
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return nil, nil
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}
|
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|
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// Check whether or not we're requested to mount an shm volume,
|
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// taking into account that PostgreSQL manifest has precedence.
|
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func mountShmVolumeNeeded(opConfig config.Config, pgSpec *acidv1.PostgresSpec) *bool {
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if pgSpec.ShmVolume != nil && *pgSpec.ShmVolume {
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return pgSpec.ShmVolume
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}
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|
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return opConfig.ShmVolume
|
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}
|
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|
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func generatePodTemplate(
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namespace string,
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labels labels.Set,
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spiloContainer *v1.Container,
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initContainers []v1.Container,
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sidecarContainers []v1.Container,
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tolerationsSpec *[]v1.Toleration,
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spiloFSGroup *int64,
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nodeAffinity *v1.Affinity,
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terminateGracePeriod int64,
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podServiceAccountName string,
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kubeIAMRole string,
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priorityClassName string,
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shmVolume *bool,
|
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podAntiAffinity bool,
|
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podAntiAffinityTopologyKey string,
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additionalSecretMount string,
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additionalSecretMountPath string,
|
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) (*v1.PodTemplateSpec, error) {
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terminateGracePeriodSeconds := terminateGracePeriod
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containers := []v1.Container{*spiloContainer}
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containers = append(containers, sidecarContainers...)
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securityContext := v1.PodSecurityContext{}
|
|
|
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if spiloFSGroup != nil {
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securityContext.FSGroup = spiloFSGroup
|
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}
|
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|
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podSpec := v1.PodSpec{
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ServiceAccountName: podServiceAccountName,
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TerminationGracePeriodSeconds: &terminateGracePeriodSeconds,
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Containers: containers,
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InitContainers: initContainers,
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Tolerations: *tolerationsSpec,
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SecurityContext: &securityContext,
|
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}
|
|
|
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if shmVolume != nil && *shmVolume {
|
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addShmVolume(&podSpec)
|
|
}
|
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|
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if podAntiAffinity {
|
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podSpec.Affinity = generatePodAffinity(labels, podAntiAffinityTopologyKey, nodeAffinity)
|
|
} else if nodeAffinity != nil {
|
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podSpec.Affinity = nodeAffinity
|
|
}
|
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|
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if priorityClassName != "" {
|
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podSpec.PriorityClassName = priorityClassName
|
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}
|
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|
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if additionalSecretMount != "" {
|
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addSecretVolume(&podSpec, additionalSecretMount, additionalSecretMountPath)
|
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}
|
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|
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template := v1.PodTemplateSpec{
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ObjectMeta: metav1.ObjectMeta{
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Labels: labels,
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Namespace: namespace,
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},
|
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Spec: podSpec,
|
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}
|
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if kubeIAMRole != "" {
|
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template.Annotations = map[string]string{constants.KubeIAmAnnotation: kubeIAMRole}
|
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}
|
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|
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return &template, nil
|
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}
|
|
|
|
// generatePodEnvVars generates environment variables for the Spilo Pod
|
|
func (c *Cluster) generateSpiloPodEnvVars(uid types.UID, spiloConfiguration string, cloneDescription *acidv1.CloneDescription, standbyDescription *acidv1.StandbyDescription, customPodEnvVarsList []v1.EnvVar) []v1.EnvVar {
|
|
envVars := []v1.EnvVar{
|
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{
|
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Name: "SCOPE",
|
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Value: c.Name,
|
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},
|
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{
|
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Name: "PGROOT",
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Value: constants.PostgresDataPath,
|
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},
|
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{
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Name: "POD_IP",
|
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ValueFrom: &v1.EnvVarSource{
|
|
FieldRef: &v1.ObjectFieldSelector{
|
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APIVersion: "v1",
|
|
FieldPath: "status.podIP",
|
|
},
|
|
},
|
|
},
|
|
{
|
|
Name: "POD_NAMESPACE",
|
|
ValueFrom: &v1.EnvVarSource{
|
|
FieldRef: &v1.ObjectFieldSelector{
|
|
APIVersion: "v1",
|
|
FieldPath: "metadata.namespace",
|
|
},
|
|
},
|
|
},
|
|
{
|
|
Name: "PGUSER_SUPERUSER",
|
|
Value: c.OpConfig.SuperUsername,
|
|
},
|
|
{
|
|
Name: "KUBERNETES_SCOPE_LABEL",
|
|
Value: c.OpConfig.ClusterNameLabel,
|
|
},
|
|
{
|
|
Name: "KUBERNETES_ROLE_LABEL",
|
|
Value: c.OpConfig.PodRoleLabel,
|
|
},
|
|
{
|
|
Name: "KUBERNETES_LABELS",
|
|
Value: labels.Set(c.OpConfig.ClusterLabels).String(),
|
|
},
|
|
{
|
|
Name: "PGPASSWORD_SUPERUSER",
|
|
ValueFrom: &v1.EnvVarSource{
|
|
SecretKeyRef: &v1.SecretKeySelector{
|
|
LocalObjectReference: v1.LocalObjectReference{
|
|
Name: c.credentialSecretName(c.OpConfig.SuperUsername),
|
|
},
|
|
Key: "password",
|
|
},
|
|
},
|
|
},
|
|
{
|
|
Name: "PGUSER_STANDBY",
|
|
Value: c.OpConfig.ReplicationUsername,
|
|
},
|
|
{
|
|
Name: "PGPASSWORD_STANDBY",
|
|
ValueFrom: &v1.EnvVarSource{
|
|
SecretKeyRef: &v1.SecretKeySelector{
|
|
LocalObjectReference: v1.LocalObjectReference{
|
|
Name: c.credentialSecretName(c.OpConfig.ReplicationUsername),
|
|
},
|
|
Key: "password",
|
|
},
|
|
},
|
|
},
|
|
{
|
|
Name: "PAM_OAUTH2",
|
|
Value: c.OpConfig.PamConfiguration,
|
|
},
|
|
{
|
|
Name: "HUMAN_ROLE",
|
|
Value: c.OpConfig.PamRoleName,
|
|
},
|
|
}
|
|
if spiloConfiguration != "" {
|
|
envVars = append(envVars, v1.EnvVar{Name: "SPILO_CONFIGURATION", Value: spiloConfiguration})
|
|
}
|
|
if c.OpConfig.WALES3Bucket != "" {
|
|
envVars = append(envVars, v1.EnvVar{Name: "WAL_S3_BUCKET", Value: c.OpConfig.WALES3Bucket})
|
|
envVars = append(envVars, v1.EnvVar{Name: "WAL_BUCKET_SCOPE_SUFFIX", Value: getBucketScopeSuffix(string(uid))})
|
|
envVars = append(envVars, v1.EnvVar{Name: "WAL_BUCKET_SCOPE_PREFIX", Value: ""})
|
|
}
|
|
|
|
if c.OpConfig.LogS3Bucket != "" {
|
|
envVars = append(envVars, v1.EnvVar{Name: "LOG_S3_BUCKET", Value: c.OpConfig.LogS3Bucket})
|
|
envVars = append(envVars, v1.EnvVar{Name: "LOG_BUCKET_SCOPE_SUFFIX", Value: getBucketScopeSuffix(string(uid))})
|
|
envVars = append(envVars, v1.EnvVar{Name: "LOG_BUCKET_SCOPE_PREFIX", Value: ""})
|
|
}
|
|
|
|
if c.patroniUsesKubernetes() {
|
|
envVars = append(envVars, v1.EnvVar{Name: "DCS_ENABLE_KUBERNETES_API", Value: "true"})
|
|
} else {
|
|
envVars = append(envVars, v1.EnvVar{Name: "ETCD_HOST", Value: c.OpConfig.EtcdHost})
|
|
}
|
|
|
|
if cloneDescription.ClusterName != "" {
|
|
envVars = append(envVars, c.generateCloneEnvironment(cloneDescription)...)
|
|
}
|
|
|
|
if c.Spec.StandbyCluster != nil {
|
|
envVars = append(envVars, c.generateStandbyEnvironment(standbyDescription)...)
|
|
}
|
|
|
|
if len(customPodEnvVarsList) > 0 {
|
|
envVars = append(envVars, customPodEnvVarsList...)
|
|
}
|
|
|
|
return envVars
|
|
}
|
|
|
|
// deduplicateEnvVars makes sure there are no duplicate in the target envVar array. While Kubernetes already
|
|
// deduplicates variables defined in a container, it leaves the last definition in the list and this behavior is not
|
|
// well-documented, which means that the behavior can be reversed at some point (it may also start producing an error).
|
|
// Therefore, the merge is done by the operator, the entries that are ahead in the passed list take priority over those
|
|
// that are behind, and only the name is considered in order to eliminate duplicates.
|
|
func deduplicateEnvVars(input []v1.EnvVar, containerName string, logger *logrus.Entry) []v1.EnvVar {
|
|
result := make([]v1.EnvVar, 0)
|
|
names := make(map[string]int)
|
|
|
|
for i, va := range input {
|
|
if names[va.Name] == 0 {
|
|
names[va.Name]++
|
|
result = append(result, input[i])
|
|
} else if names[va.Name] == 1 {
|
|
names[va.Name]++
|
|
logger.Warningf("variable %q is defined in %q more than once, the subsequent definitions are ignored",
|
|
va.Name, containerName)
|
|
}
|
|
}
|
|
return result
|
|
}
|
|
|
|
func getSidecarContainer(sidecar acidv1.Sidecar, index int, volumeMounts []v1.VolumeMount,
|
|
resources *v1.ResourceRequirements, superUserName string, credentialsSecretName string, logger *logrus.Entry) *v1.Container {
|
|
name := sidecar.Name
|
|
if name == "" {
|
|
name = fmt.Sprintf("sidecar-%d", index)
|
|
}
|
|
|
|
env := []v1.EnvVar{
|
|
{
|
|
Name: "POD_NAME",
|
|
ValueFrom: &v1.EnvVarSource{
|
|
FieldRef: &v1.ObjectFieldSelector{
|
|
APIVersion: "v1",
|
|
FieldPath: "metadata.name",
|
|
},
|
|
},
|
|
},
|
|
{
|
|
Name: "POD_NAMESPACE",
|
|
ValueFrom: &v1.EnvVarSource{
|
|
FieldRef: &v1.ObjectFieldSelector{
|
|
APIVersion: "v1",
|
|
FieldPath: "metadata.namespace",
|
|
},
|
|
},
|
|
},
|
|
{
|
|
Name: "POSTGRES_USER",
|
|
Value: superUserName,
|
|
},
|
|
{
|
|
Name: "POSTGRES_PASSWORD",
|
|
ValueFrom: &v1.EnvVarSource{
|
|
SecretKeyRef: &v1.SecretKeySelector{
|
|
LocalObjectReference: v1.LocalObjectReference{
|
|
Name: credentialsSecretName,
|
|
},
|
|
Key: "password",
|
|
},
|
|
},
|
|
},
|
|
}
|
|
if len(sidecar.Env) > 0 {
|
|
env = append(env, sidecar.Env...)
|
|
}
|
|
return &v1.Container{
|
|
Name: name,
|
|
Image: sidecar.DockerImage,
|
|
ImagePullPolicy: v1.PullIfNotPresent,
|
|
Resources: *resources,
|
|
VolumeMounts: volumeMounts,
|
|
Env: deduplicateEnvVars(env, name, logger),
|
|
Ports: sidecar.Ports,
|
|
}
|
|
}
|
|
|
|
func getBucketScopeSuffix(uid string) string {
|
|
if uid != "" {
|
|
return fmt.Sprintf("/%s", uid)
|
|
}
|
|
return ""
|
|
}
|
|
|
|
func makeResources(cpuRequest, memoryRequest, cpuLimit, memoryLimit string) acidv1.Resources {
|
|
return acidv1.Resources{
|
|
ResourceRequests: acidv1.ResourceDescription{
|
|
CPU: cpuRequest,
|
|
Memory: memoryRequest,
|
|
},
|
|
ResourceLimits: acidv1.ResourceDescription{
|
|
CPU: cpuLimit,
|
|
Memory: memoryLimit,
|
|
},
|
|
}
|
|
}
|
|
|
|
func (c *Cluster) generateStatefulSet(spec *acidv1.PostgresSpec) (*appsv1.StatefulSet, error) {
|
|
|
|
var (
|
|
err error
|
|
sidecarContainers []v1.Container
|
|
podTemplate *v1.PodTemplateSpec
|
|
volumeClaimTemplate *v1.PersistentVolumeClaim
|
|
)
|
|
|
|
// Improve me. Please.
|
|
if c.OpConfig.SetMemoryRequestToLimit {
|
|
|
|
// controller adjusts the default memory request at operator startup
|
|
|
|
request := spec.Resources.ResourceRequests.Memory
|
|
if request == "" {
|
|
request = c.OpConfig.DefaultMemoryRequest
|
|
}
|
|
|
|
limit := spec.Resources.ResourceLimits.Memory
|
|
if limit == "" {
|
|
limit = c.OpConfig.DefaultMemoryLimit
|
|
}
|
|
|
|
isSmaller, err := util.RequestIsSmallerThanLimit(request, limit)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if isSmaller {
|
|
c.logger.Warningf("The memory request of %v for the Postgres container is increased to match the memory limit of %v.", request, limit)
|
|
spec.Resources.ResourceRequests.Memory = limit
|
|
|
|
}
|
|
|
|
// controller adjusts the Scalyr sidecar request at operator startup
|
|
// as this sidecar is managed separately
|
|
|
|
// adjust sidecar containers defined for that particular cluster
|
|
for _, sidecar := range spec.Sidecars {
|
|
|
|
// TODO #413
|
|
sidecarRequest := sidecar.Resources.ResourceRequests.Memory
|
|
if request == "" {
|
|
request = c.OpConfig.DefaultMemoryRequest
|
|
}
|
|
|
|
sidecarLimit := sidecar.Resources.ResourceLimits.Memory
|
|
if limit == "" {
|
|
limit = c.OpConfig.DefaultMemoryLimit
|
|
}
|
|
|
|
isSmaller, err := util.RequestIsSmallerThanLimit(sidecarRequest, sidecarLimit)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if isSmaller {
|
|
c.logger.Warningf("The memory request of %v for the %v sidecar container is increased to match the memory limit of %v.", sidecar.Resources.ResourceRequests.Memory, sidecar.Name, sidecar.Resources.ResourceLimits.Memory)
|
|
sidecar.Resources.ResourceRequests.Memory = sidecar.Resources.ResourceLimits.Memory
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
defaultResources := c.makeDefaultResources()
|
|
|
|
resourceRequirements, err := generateResourceRequirements(spec.Resources, defaultResources)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("could not generate resource requirements: %v", err)
|
|
}
|
|
|
|
customPodEnvVarsList := make([]v1.EnvVar, 0)
|
|
|
|
if c.OpConfig.PodEnvironmentConfigMap != "" {
|
|
var cm *v1.ConfigMap
|
|
cm, err = c.KubeClient.ConfigMaps(c.Namespace).Get(c.OpConfig.PodEnvironmentConfigMap, metav1.GetOptions{})
|
|
if err != nil {
|
|
return nil, fmt.Errorf("could not read PodEnvironmentConfigMap: %v", err)
|
|
}
|
|
for k, v := range cm.Data {
|
|
customPodEnvVarsList = append(customPodEnvVarsList, v1.EnvVar{Name: k, Value: v})
|
|
}
|
|
sort.Slice(customPodEnvVarsList,
|
|
func(i, j int) bool { return customPodEnvVarsList[i].Name < customPodEnvVarsList[j].Name })
|
|
}
|
|
if spec.StandbyCluster != nil && spec.StandbyCluster.S3WalPath == "" {
|
|
return nil, fmt.Errorf("s3_wal_path is empty for standby cluster")
|
|
}
|
|
|
|
// backward compatible check for InitContainers
|
|
if spec.InitContainersOld != nil {
|
|
msg := "Manifest parameter init_containers is deprecated."
|
|
if spec.InitContainers == nil {
|
|
c.logger.Warningf("%s Consider using initContainers instead.", msg)
|
|
spec.InitContainers = spec.InitContainersOld
|
|
} else {
|
|
c.logger.Warningf("%s Only value from initContainers is used", msg)
|
|
}
|
|
}
|
|
|
|
// backward compatible check for PodPriorityClassName
|
|
if spec.PodPriorityClassNameOld != "" {
|
|
msg := "Manifest parameter pod_priority_class_name is deprecated."
|
|
if spec.PodPriorityClassName == "" {
|
|
c.logger.Warningf("%s Consider using podPriorityClassName instead.", msg)
|
|
spec.PodPriorityClassName = spec.PodPriorityClassNameOld
|
|
} else {
|
|
c.logger.Warningf("%s Only value from podPriorityClassName is used", msg)
|
|
}
|
|
}
|
|
|
|
spiloConfiguration, err := generateSpiloJSONConfiguration(&spec.PostgresqlParam, &spec.Patroni, c.OpConfig.PamRoleName, c.logger)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("could not generate Spilo JSON configuration: %v", err)
|
|
}
|
|
|
|
// generate environment variables for the spilo container
|
|
spiloEnvVars := deduplicateEnvVars(
|
|
c.generateSpiloPodEnvVars(c.Postgresql.GetUID(), spiloConfiguration, &spec.Clone,
|
|
spec.StandbyCluster, customPodEnvVarsList), c.containerName(), c.logger)
|
|
|
|
// pickup the docker image for the spilo container
|
|
effectiveDockerImage := util.Coalesce(spec.DockerImage, c.OpConfig.DockerImage)
|
|
|
|
volumeMounts := generateVolumeMounts(spec.Volume)
|
|
|
|
// generate the spilo container
|
|
c.logger.Debugf("Generating Spilo container, environment variables: %v", spiloEnvVars)
|
|
spiloContainer := generateContainer(c.containerName(),
|
|
&effectiveDockerImage,
|
|
resourceRequirements,
|
|
spiloEnvVars,
|
|
volumeMounts,
|
|
c.OpConfig.Resources.SpiloPrivileged,
|
|
)
|
|
|
|
// resolve conflicts between operator-global and per-cluster sidecars
|
|
sideCars := c.mergeSidecars(spec.Sidecars)
|
|
|
|
resourceRequirementsScalyrSidecar := makeResources(
|
|
c.OpConfig.ScalyrCPURequest,
|
|
c.OpConfig.ScalyrMemoryRequest,
|
|
c.OpConfig.ScalyrCPULimit,
|
|
c.OpConfig.ScalyrMemoryLimit,
|
|
)
|
|
|
|
// generate scalyr sidecar container
|
|
if scalyrSidecar :=
|
|
generateScalyrSidecarSpec(c.Name,
|
|
c.OpConfig.ScalyrAPIKey,
|
|
c.OpConfig.ScalyrServerURL,
|
|
c.OpConfig.ScalyrImage,
|
|
&resourceRequirementsScalyrSidecar, c.logger); scalyrSidecar != nil {
|
|
sideCars = append(sideCars, *scalyrSidecar)
|
|
}
|
|
|
|
// generate sidecar containers
|
|
if sidecarContainers, err = generateSidecarContainers(sideCars, volumeMounts, defaultResources,
|
|
c.OpConfig.SuperUsername, c.credentialSecretName(c.OpConfig.SuperUsername), c.logger); err != nil {
|
|
return nil, fmt.Errorf("could not generate sidecar containers: %v", err)
|
|
}
|
|
|
|
tolerationSpec := tolerations(&spec.Tolerations, c.OpConfig.PodToleration)
|
|
effectivePodPriorityClassName := util.Coalesce(spec.PodPriorityClassName, c.OpConfig.PodPriorityClassName)
|
|
|
|
// determine the FSGroup for the spilo pod
|
|
effectiveFSGroup := c.OpConfig.Resources.SpiloFSGroup
|
|
if spec.SpiloFSGroup != nil {
|
|
effectiveFSGroup = spec.SpiloFSGroup
|
|
}
|
|
|
|
// generate pod template for the statefulset, based on the spilo container and sidecars
|
|
if podTemplate, err = generatePodTemplate(
|
|
c.Namespace,
|
|
c.labelsSet(true),
|
|
spiloContainer,
|
|
spec.InitContainers,
|
|
sidecarContainers,
|
|
&tolerationSpec,
|
|
effectiveFSGroup,
|
|
nodeAffinity(c.OpConfig.NodeReadinessLabel),
|
|
int64(c.OpConfig.PodTerminateGracePeriod.Seconds()),
|
|
c.OpConfig.PodServiceAccountName,
|
|
c.OpConfig.KubeIAMRole,
|
|
effectivePodPriorityClassName,
|
|
mountShmVolumeNeeded(c.OpConfig, spec),
|
|
c.OpConfig.EnablePodAntiAffinity,
|
|
c.OpConfig.PodAntiAffinityTopologyKey,
|
|
c.OpConfig.AdditionalSecretMount,
|
|
c.OpConfig.AdditionalSecretMountPath); err != nil {
|
|
return nil, fmt.Errorf("could not generate pod template: %v", err)
|
|
}
|
|
|
|
if err != nil {
|
|
return nil, fmt.Errorf("could not generate pod template: %v", err)
|
|
}
|
|
|
|
if volumeClaimTemplate, err = generatePersistentVolumeClaimTemplate(spec.Volume.Size,
|
|
spec.Volume.StorageClass); err != nil {
|
|
return nil, fmt.Errorf("could not generate volume claim template: %v", err)
|
|
}
|
|
|
|
numberOfInstances := c.getNumberOfInstances(spec)
|
|
|
|
// the operator has domain-specific logic on how to do rolling updates of PG clusters
|
|
// so we do not use default rolling updates implemented by stateful sets
|
|
// that leaves the legacy "OnDelete" update strategy as the only option
|
|
updateStrategy := appsv1.StatefulSetUpdateStrategy{Type: appsv1.OnDeleteStatefulSetStrategyType}
|
|
|
|
var podManagementPolicy appsv1.PodManagementPolicyType
|
|
if c.OpConfig.PodManagementPolicy == "ordered_ready" {
|
|
podManagementPolicy = appsv1.OrderedReadyPodManagement
|
|
} else if c.OpConfig.PodManagementPolicy == "parallel" {
|
|
podManagementPolicy = appsv1.ParallelPodManagement
|
|
} else {
|
|
return nil, fmt.Errorf("could not set the pod management policy to the unknown value: %v", c.OpConfig.PodManagementPolicy)
|
|
}
|
|
|
|
statefulSet := &appsv1.StatefulSet{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: c.statefulSetName(),
|
|
Namespace: c.Namespace,
|
|
Labels: c.labelsSet(true),
|
|
Annotations: map[string]string{rollingUpdateStatefulsetAnnotationKey: "false"},
|
|
},
|
|
Spec: appsv1.StatefulSetSpec{
|
|
Replicas: &numberOfInstances,
|
|
Selector: c.labelsSelector(),
|
|
ServiceName: c.serviceName(Master),
|
|
Template: *podTemplate,
|
|
VolumeClaimTemplates: []v1.PersistentVolumeClaim{*volumeClaimTemplate},
|
|
UpdateStrategy: updateStrategy,
|
|
PodManagementPolicy: podManagementPolicy,
|
|
},
|
|
}
|
|
|
|
return statefulSet, nil
|
|
}
|
|
|
|
func generateScalyrSidecarSpec(clusterName, APIKey, serverURL, dockerImage string,
|
|
containerResources *acidv1.Resources, logger *logrus.Entry) *acidv1.Sidecar {
|
|
if APIKey == "" || dockerImage == "" {
|
|
if APIKey == "" && dockerImage != "" {
|
|
logger.Warning("Not running Scalyr sidecar: SCALYR_API_KEY must be defined")
|
|
}
|
|
return nil
|
|
}
|
|
scalarSpec := &acidv1.Sidecar{
|
|
Name: "scalyr-sidecar",
|
|
DockerImage: dockerImage,
|
|
Env: []v1.EnvVar{
|
|
{
|
|
Name: "SCALYR_API_KEY",
|
|
Value: APIKey,
|
|
},
|
|
{
|
|
Name: "SCALYR_SERVER_HOST",
|
|
Value: clusterName,
|
|
},
|
|
},
|
|
Resources: *containerResources,
|
|
}
|
|
if serverURL != "" {
|
|
scalarSpec.Env = append(scalarSpec.Env, v1.EnvVar{Name: "SCALYR_SERVER_URL", Value: serverURL})
|
|
}
|
|
return scalarSpec
|
|
}
|
|
|
|
// mergeSidecar merges globally-defined sidecars with those defined in the cluster manifest
|
|
func (c *Cluster) mergeSidecars(sidecars []acidv1.Sidecar) []acidv1.Sidecar {
|
|
globalSidecarsToSkip := map[string]bool{}
|
|
result := make([]acidv1.Sidecar, 0)
|
|
|
|
for i, sidecar := range sidecars {
|
|
dockerImage, ok := c.OpConfig.Sidecars[sidecar.Name]
|
|
if ok {
|
|
if dockerImage != sidecar.DockerImage {
|
|
c.logger.Warningf("merging definitions for sidecar %q: "+
|
|
"ignoring %q in the global scope in favor of %q defined in the cluster",
|
|
sidecar.Name, dockerImage, sidecar.DockerImage)
|
|
}
|
|
globalSidecarsToSkip[sidecar.Name] = true
|
|
}
|
|
result = append(result, sidecars[i])
|
|
}
|
|
for name, dockerImage := range c.OpConfig.Sidecars {
|
|
if !globalSidecarsToSkip[name] {
|
|
result = append(result, acidv1.Sidecar{Name: name, DockerImage: dockerImage})
|
|
}
|
|
}
|
|
return result
|
|
}
|
|
|
|
func (c *Cluster) getNumberOfInstances(spec *acidv1.PostgresSpec) int32 {
|
|
min := c.OpConfig.MinInstances
|
|
max := c.OpConfig.MaxInstances
|
|
cur := spec.NumberOfInstances
|
|
newcur := cur
|
|
|
|
/* Limit the max number of pods to one, if this is standby-cluster */
|
|
if spec.StandbyCluster != nil {
|
|
c.logger.Info("Standby cluster can have maximum of 1 pod")
|
|
max = 1
|
|
}
|
|
if max >= 0 && newcur > max {
|
|
newcur = max
|
|
}
|
|
if min >= 0 && newcur < min {
|
|
newcur = min
|
|
}
|
|
if newcur != cur {
|
|
c.logger.Infof("adjusted number of instances from %d to %d (min: %d, max: %d)", cur, newcur, min, max)
|
|
}
|
|
|
|
return newcur
|
|
}
|
|
|
|
// To avoid issues with limited /dev/shm inside docker environment, when
|
|
// PostgreSQL can't allocate enough of dsa segments from it, we can
|
|
// mount an extra memory volume
|
|
//
|
|
// see https://docs.okd.io/latest/dev_guide/shared_memory.html
|
|
func addShmVolume(podSpec *v1.PodSpec) {
|
|
volumes := append(podSpec.Volumes, v1.Volume{
|
|
Name: constants.ShmVolumeName,
|
|
VolumeSource: v1.VolumeSource{
|
|
EmptyDir: &v1.EmptyDirVolumeSource{
|
|
Medium: "Memory",
|
|
},
|
|
},
|
|
})
|
|
|
|
pgIdx := constants.PostgresContainerIdx
|
|
mounts := append(podSpec.Containers[pgIdx].VolumeMounts,
|
|
v1.VolumeMount{
|
|
Name: constants.ShmVolumeName,
|
|
MountPath: constants.ShmVolumePath,
|
|
})
|
|
|
|
podSpec.Containers[0].VolumeMounts = mounts
|
|
podSpec.Volumes = volumes
|
|
}
|
|
|
|
func addSecretVolume(podSpec *v1.PodSpec, additionalSecretMount string, additionalSecretMountPath string) {
|
|
volumes := append(podSpec.Volumes, v1.Volume{
|
|
Name: additionalSecretMount,
|
|
VolumeSource: v1.VolumeSource{
|
|
Secret: &v1.SecretVolumeSource{
|
|
SecretName: additionalSecretMount,
|
|
},
|
|
},
|
|
})
|
|
|
|
for i := range podSpec.Containers {
|
|
mounts := append(podSpec.Containers[i].VolumeMounts,
|
|
v1.VolumeMount{
|
|
Name: additionalSecretMount,
|
|
MountPath: additionalSecretMountPath,
|
|
})
|
|
podSpec.Containers[i].VolumeMounts = mounts
|
|
}
|
|
|
|
podSpec.Volumes = volumes
|
|
}
|
|
|
|
func generatePersistentVolumeClaimTemplate(volumeSize, volumeStorageClass string) (*v1.PersistentVolumeClaim, error) {
|
|
|
|
var storageClassName *string
|
|
|
|
metadata := metav1.ObjectMeta{
|
|
Name: constants.DataVolumeName,
|
|
}
|
|
if volumeStorageClass != "" {
|
|
// TODO: remove the old annotation, switching completely to the StorageClassName field.
|
|
metadata.Annotations = map[string]string{"volume.beta.kubernetes.io/storage-class": volumeStorageClass}
|
|
storageClassName = &volumeStorageClass
|
|
} else {
|
|
metadata.Annotations = map[string]string{"volume.alpha.kubernetes.io/storage-class": "default"}
|
|
storageClassName = nil
|
|
}
|
|
|
|
quantity, err := resource.ParseQuantity(volumeSize)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("could not parse volume size: %v", err)
|
|
}
|
|
|
|
volumeMode := v1.PersistentVolumeFilesystem
|
|
volumeClaim := &v1.PersistentVolumeClaim{
|
|
ObjectMeta: metadata,
|
|
Spec: v1.PersistentVolumeClaimSpec{
|
|
AccessModes: []v1.PersistentVolumeAccessMode{v1.ReadWriteOnce},
|
|
Resources: v1.ResourceRequirements{
|
|
Requests: v1.ResourceList{
|
|
v1.ResourceStorage: quantity,
|
|
},
|
|
},
|
|
StorageClassName: storageClassName,
|
|
VolumeMode: &volumeMode,
|
|
},
|
|
}
|
|
|
|
return volumeClaim, nil
|
|
}
|
|
|
|
func (c *Cluster) generateUserSecrets() map[string]*v1.Secret {
|
|
secrets := make(map[string]*v1.Secret, len(c.pgUsers))
|
|
namespace := c.Namespace
|
|
for username, pgUser := range c.pgUsers {
|
|
//Skip users with no password i.e. human users (they'll be authenticated using pam)
|
|
secret := c.generateSingleUserSecret(namespace, pgUser)
|
|
if secret != nil {
|
|
secrets[username] = secret
|
|
}
|
|
}
|
|
/* special case for the system user */
|
|
for _, systemUser := range c.systemUsers {
|
|
secret := c.generateSingleUserSecret(namespace, systemUser)
|
|
if secret != nil {
|
|
secrets[systemUser.Name] = secret
|
|
}
|
|
}
|
|
|
|
return secrets
|
|
}
|
|
|
|
func (c *Cluster) generateSingleUserSecret(namespace string, pgUser spec.PgUser) *v1.Secret {
|
|
//Skip users with no password i.e. human users (they'll be authenticated using pam)
|
|
if pgUser.Password == "" {
|
|
if pgUser.Origin != spec.RoleOriginTeamsAPI {
|
|
c.logger.Warningf("could not generate secret for a non-teamsAPI role %q: role has no password",
|
|
pgUser.Name)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
//skip NOLOGIN users
|
|
for _, flag := range pgUser.Flags {
|
|
if flag == constants.RoleFlagNoLogin {
|
|
return nil
|
|
}
|
|
}
|
|
|
|
username := pgUser.Name
|
|
secret := v1.Secret{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: c.credentialSecretName(username),
|
|
Namespace: namespace,
|
|
Labels: c.labelsSet(true),
|
|
},
|
|
Type: v1.SecretTypeOpaque,
|
|
Data: map[string][]byte{
|
|
"username": []byte(pgUser.Name),
|
|
"password": []byte(pgUser.Password),
|
|
},
|
|
}
|
|
return &secret
|
|
}
|
|
|
|
func (c *Cluster) shouldCreateLoadBalancerForService(role PostgresRole, spec *acidv1.PostgresSpec) bool {
|
|
|
|
switch role {
|
|
|
|
case Replica:
|
|
|
|
// if the value is explicitly set in a Postgresql manifest, follow this setting
|
|
if spec.EnableReplicaLoadBalancer != nil {
|
|
return *spec.EnableReplicaLoadBalancer
|
|
}
|
|
|
|
// otherwise, follow the operator configuration
|
|
return c.OpConfig.EnableReplicaLoadBalancer
|
|
|
|
case Master:
|
|
|
|
if spec.EnableMasterLoadBalancer != nil {
|
|
return *spec.EnableMasterLoadBalancer
|
|
}
|
|
|
|
return c.OpConfig.EnableMasterLoadBalancer
|
|
|
|
default:
|
|
panic(fmt.Sprintf("Unknown role %v", role))
|
|
}
|
|
|
|
}
|
|
|
|
func (c *Cluster) generateService(role PostgresRole, spec *acidv1.PostgresSpec) *v1.Service {
|
|
var dnsName string
|
|
|
|
if role == Master {
|
|
dnsName = c.masterDNSName()
|
|
} else {
|
|
dnsName = c.replicaDNSName()
|
|
}
|
|
|
|
serviceSpec := v1.ServiceSpec{
|
|
Ports: []v1.ServicePort{{Name: "postgresql", Port: 5432, TargetPort: intstr.IntOrString{IntVal: 5432}}},
|
|
Type: v1.ServiceTypeClusterIP,
|
|
}
|
|
|
|
if role == Replica {
|
|
serviceSpec.Selector = c.roleLabelsSet(false, role)
|
|
}
|
|
|
|
var annotations map[string]string
|
|
|
|
if c.shouldCreateLoadBalancerForService(role, spec) {
|
|
|
|
// spec.AllowedSourceRanges evaluates to the empty slice of zero length
|
|
// when omitted or set to 'null'/empty sequence in the PG manifest
|
|
if len(spec.AllowedSourceRanges) > 0 {
|
|
serviceSpec.LoadBalancerSourceRanges = spec.AllowedSourceRanges
|
|
} else {
|
|
// safe default value: lock a load balancer only to the local address unless overridden explicitly
|
|
serviceSpec.LoadBalancerSourceRanges = []string{localHost}
|
|
}
|
|
|
|
c.logger.Debugf("final load balancer source ranges as seen in a service spec (not necessarily applied): %q", serviceSpec.LoadBalancerSourceRanges)
|
|
serviceSpec.Type = v1.ServiceTypeLoadBalancer
|
|
|
|
annotations = map[string]string{
|
|
constants.ZalandoDNSNameAnnotation: dnsName,
|
|
constants.ElbTimeoutAnnotationName: constants.ElbTimeoutAnnotationValue,
|
|
}
|
|
|
|
if len(c.OpConfig.CustomServiceAnnotations) != 0 {
|
|
c.logger.Debugf("There are custom annotations defined, creating them.")
|
|
for customAnnotationKey, customAnnotationValue := range c.OpConfig.CustomServiceAnnotations {
|
|
annotations[customAnnotationKey] = customAnnotationValue
|
|
}
|
|
}
|
|
} else if role == Replica {
|
|
// before PR #258, the replica service was only created if allocated a LB
|
|
// now we always create the service but warn if the LB is absent
|
|
c.logger.Debugf("No load balancer created for the replica service")
|
|
}
|
|
|
|
service := &v1.Service{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: c.serviceName(role),
|
|
Namespace: c.Namespace,
|
|
Labels: c.roleLabelsSet(true, role),
|
|
Annotations: annotations,
|
|
},
|
|
Spec: serviceSpec,
|
|
}
|
|
|
|
return service
|
|
}
|
|
|
|
func (c *Cluster) generateEndpoint(role PostgresRole, subsets []v1.EndpointSubset) *v1.Endpoints {
|
|
endpoints := &v1.Endpoints{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: c.endpointName(role),
|
|
Namespace: c.Namespace,
|
|
Labels: c.roleLabelsSet(true, role),
|
|
},
|
|
}
|
|
if len(subsets) > 0 {
|
|
endpoints.Subsets = subsets
|
|
}
|
|
|
|
return endpoints
|
|
}
|
|
|
|
func (c *Cluster) generateCloneEnvironment(description *acidv1.CloneDescription) []v1.EnvVar {
|
|
result := make([]v1.EnvVar, 0)
|
|
|
|
if description.ClusterName == "" {
|
|
return result
|
|
}
|
|
|
|
cluster := description.ClusterName
|
|
result = append(result, v1.EnvVar{Name: "CLONE_SCOPE", Value: cluster})
|
|
if description.EndTimestamp == "" {
|
|
// cloning with basebackup, make a connection string to the cluster to clone from
|
|
host, port := c.getClusterServiceConnectionParameters(cluster)
|
|
// TODO: make some/all of those constants
|
|
result = append(result, v1.EnvVar{Name: "CLONE_METHOD", Value: "CLONE_WITH_BASEBACKUP"})
|
|
result = append(result, v1.EnvVar{Name: "CLONE_HOST", Value: host})
|
|
result = append(result, v1.EnvVar{Name: "CLONE_PORT", Value: port})
|
|
// TODO: assume replication user name is the same for all clusters, fetch it from secrets otherwise
|
|
result = append(result, v1.EnvVar{Name: "CLONE_USER", Value: c.OpConfig.ReplicationUsername})
|
|
result = append(result,
|
|
v1.EnvVar{Name: "CLONE_PASSWORD",
|
|
ValueFrom: &v1.EnvVarSource{
|
|
SecretKeyRef: &v1.SecretKeySelector{
|
|
LocalObjectReference: v1.LocalObjectReference{
|
|
Name: c.credentialSecretNameForCluster(c.OpConfig.ReplicationUsername,
|
|
description.ClusterName),
|
|
},
|
|
Key: "password",
|
|
},
|
|
},
|
|
})
|
|
} else {
|
|
// cloning with S3, find out the bucket to clone
|
|
msg := "Clone from S3 bucket"
|
|
c.logger.Info(msg, description.S3WalPath)
|
|
|
|
if description.S3WalPath == "" {
|
|
msg := "Figure out which S3 bucket to use from env"
|
|
c.logger.Info(msg, description.S3WalPath)
|
|
|
|
envs := []v1.EnvVar{
|
|
v1.EnvVar{
|
|
Name: "CLONE_WAL_S3_BUCKET",
|
|
Value: c.OpConfig.WALES3Bucket,
|
|
},
|
|
v1.EnvVar{
|
|
Name: "CLONE_WAL_BUCKET_SCOPE_SUFFIX",
|
|
Value: getBucketScopeSuffix(description.UID),
|
|
},
|
|
}
|
|
|
|
result = append(result, envs...)
|
|
} else {
|
|
msg := "Use custom parsed S3WalPath %s from the manifest"
|
|
c.logger.Warningf(msg, description.S3WalPath)
|
|
|
|
result = append(result, v1.EnvVar{
|
|
Name: "CLONE_WALE_S3_PREFIX",
|
|
Value: description.S3WalPath,
|
|
})
|
|
}
|
|
|
|
result = append(result, v1.EnvVar{Name: "CLONE_METHOD", Value: "CLONE_WITH_WALE"})
|
|
result = append(result, v1.EnvVar{Name: "CLONE_TARGET_TIME", Value: description.EndTimestamp})
|
|
result = append(result, v1.EnvVar{Name: "CLONE_WAL_BUCKET_SCOPE_PREFIX", Value: ""})
|
|
|
|
if description.S3Endpoint != "" {
|
|
result = append(result, v1.EnvVar{Name: "CLONE_AWS_ENDPOINT", Value: description.S3Endpoint})
|
|
result = append(result, v1.EnvVar{Name: "CLONE_WALE_S3_ENDPOINT", Value: description.S3Endpoint})
|
|
}
|
|
|
|
if description.S3AccessKeyId != "" {
|
|
result = append(result, v1.EnvVar{Name: "CLONE_AWS_ACCESS_KEY_ID", Value: description.S3AccessKeyId})
|
|
}
|
|
|
|
if description.S3SecretAccessKey != "" {
|
|
result = append(result, v1.EnvVar{Name: "CLONE_AWS_SECRET_ACCESS_KEY", Value: description.S3SecretAccessKey})
|
|
}
|
|
|
|
if description.S3ForcePathStyle != nil {
|
|
s3ForcePathStyle := "0"
|
|
|
|
if *description.S3ForcePathStyle {
|
|
s3ForcePathStyle = "1"
|
|
}
|
|
|
|
result = append(result, v1.EnvVar{Name: "CLONE_AWS_S3_FORCE_PATH_STYLE", Value: s3ForcePathStyle})
|
|
}
|
|
}
|
|
|
|
return result
|
|
}
|
|
|
|
func (c *Cluster) generateStandbyEnvironment(description *acidv1.StandbyDescription) []v1.EnvVar {
|
|
result := make([]v1.EnvVar, 0)
|
|
|
|
if description.S3WalPath == "" {
|
|
return nil
|
|
}
|
|
// standby with S3, find out the bucket to setup standby
|
|
msg := "Standby from S3 bucket using custom parsed S3WalPath from the manifest %s "
|
|
c.logger.Infof(msg, description.S3WalPath)
|
|
|
|
result = append(result, v1.EnvVar{
|
|
Name: "STANDBY_WALE_S3_PREFIX",
|
|
Value: description.S3WalPath,
|
|
})
|
|
|
|
result = append(result, v1.EnvVar{Name: "STANDBY_METHOD", Value: "STANDBY_WITH_WALE"})
|
|
result = append(result, v1.EnvVar{Name: "STANDBY_WAL_BUCKET_SCOPE_PREFIX", Value: ""})
|
|
|
|
return result
|
|
}
|
|
|
|
func (c *Cluster) generatePodDisruptionBudget() *policybeta1.PodDisruptionBudget {
|
|
minAvailable := intstr.FromInt(1)
|
|
pdbEnabled := c.OpConfig.EnablePodDisruptionBudget
|
|
|
|
// if PodDisruptionBudget is disabled or if there are no DB pods, set the budget to 0.
|
|
if (pdbEnabled != nil && !*pdbEnabled) || c.Spec.NumberOfInstances <= 0 {
|
|
minAvailable = intstr.FromInt(0)
|
|
}
|
|
|
|
return &policybeta1.PodDisruptionBudget{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: c.podDisruptionBudgetName(),
|
|
Namespace: c.Namespace,
|
|
Labels: c.labelsSet(true),
|
|
},
|
|
Spec: policybeta1.PodDisruptionBudgetSpec{
|
|
MinAvailable: &minAvailable,
|
|
Selector: &metav1.LabelSelector{
|
|
MatchLabels: c.roleLabelsSet(false, Master),
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
// getClusterServiceConnectionParameters fetches cluster host name and port
|
|
// TODO: perhaps we need to query the service (i.e. if non-standard port is used?)
|
|
// TODO: handle clusters in different namespaces
|
|
func (c *Cluster) getClusterServiceConnectionParameters(clusterName string) (host string, port string) {
|
|
host = clusterName
|
|
port = "5432"
|
|
return
|
|
}
|
|
|
|
func (c *Cluster) generateLogicalBackupJob() (*batchv1beta1.CronJob, error) {
|
|
|
|
var (
|
|
err error
|
|
podTemplate *v1.PodTemplateSpec
|
|
resourceRequirements *v1.ResourceRequirements
|
|
)
|
|
|
|
// NB: a cron job creates standard batch jobs according to schedule; these batch jobs manage pods and clean-up
|
|
|
|
c.logger.Debug("Generating logical backup pod template")
|
|
|
|
// allocate for the backup pod the same amount of resources as for normal DB pods
|
|
defaultResources := c.makeDefaultResources()
|
|
resourceRequirements, err = generateResourceRequirements(c.Spec.Resources, defaultResources)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("could not generate resource requirements for logical backup pods: %v", err)
|
|
}
|
|
|
|
envVars := c.generateLogicalBackupPodEnvVars()
|
|
logicalBackupContainer := generateContainer(
|
|
"logical-backup",
|
|
&c.OpConfig.LogicalBackup.LogicalBackupDockerImage,
|
|
resourceRequirements,
|
|
envVars,
|
|
[]v1.VolumeMount{},
|
|
c.OpConfig.SpiloPrivileged, // use same value as for normal DB pods
|
|
)
|
|
|
|
labels := map[string]string{
|
|
"version": c.Name,
|
|
"application": "spilo-logical-backup",
|
|
}
|
|
podAffinityTerm := v1.PodAffinityTerm{
|
|
LabelSelector: &metav1.LabelSelector{
|
|
MatchLabels: labels,
|
|
},
|
|
TopologyKey: "kubernetes.io/hostname",
|
|
}
|
|
podAffinity := v1.Affinity{
|
|
PodAffinity: &v1.PodAffinity{
|
|
PreferredDuringSchedulingIgnoredDuringExecution: []v1.WeightedPodAffinityTerm{{
|
|
Weight: 1,
|
|
PodAffinityTerm: podAffinityTerm,
|
|
},
|
|
},
|
|
}}
|
|
|
|
// re-use the method that generates DB pod templates
|
|
if podTemplate, err = generatePodTemplate(
|
|
c.Namespace,
|
|
labels,
|
|
logicalBackupContainer,
|
|
[]v1.Container{},
|
|
[]v1.Container{},
|
|
&[]v1.Toleration{},
|
|
nil,
|
|
nodeAffinity(c.OpConfig.NodeReadinessLabel),
|
|
int64(c.OpConfig.PodTerminateGracePeriod.Seconds()),
|
|
c.OpConfig.PodServiceAccountName,
|
|
c.OpConfig.KubeIAMRole,
|
|
"",
|
|
util.False(),
|
|
false,
|
|
"",
|
|
"",
|
|
""); err != nil {
|
|
return nil, fmt.Errorf("could not generate pod template for logical backup pod: %v", err)
|
|
}
|
|
|
|
// overwrite specific params of logical backups pods
|
|
podTemplate.Spec.Affinity = &podAffinity
|
|
podTemplate.Spec.RestartPolicy = "Never" // affects containers within a pod
|
|
|
|
// configure a batch job
|
|
|
|
jobSpec := batchv1.JobSpec{
|
|
Template: *podTemplate,
|
|
}
|
|
|
|
// configure a cron job
|
|
|
|
jobTemplateSpec := batchv1beta1.JobTemplateSpec{
|
|
Spec: jobSpec,
|
|
}
|
|
|
|
schedule := c.Postgresql.Spec.LogicalBackupSchedule
|
|
if schedule == "" {
|
|
schedule = c.OpConfig.LogicalBackupSchedule
|
|
}
|
|
|
|
cronJob := &batchv1beta1.CronJob{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: c.getLogicalBackupJobName(),
|
|
Namespace: c.Namespace,
|
|
Labels: c.labelsSet(true),
|
|
},
|
|
Spec: batchv1beta1.CronJobSpec{
|
|
Schedule: schedule,
|
|
JobTemplate: jobTemplateSpec,
|
|
ConcurrencyPolicy: batchv1beta1.ForbidConcurrent,
|
|
},
|
|
}
|
|
|
|
return cronJob, nil
|
|
}
|
|
|
|
func (c *Cluster) generateLogicalBackupPodEnvVars() []v1.EnvVar {
|
|
|
|
envVars := []v1.EnvVar{
|
|
{
|
|
Name: "SCOPE",
|
|
Value: c.Name,
|
|
},
|
|
{
|
|
Name: "POD_NAMESPACE",
|
|
ValueFrom: &v1.EnvVarSource{
|
|
FieldRef: &v1.ObjectFieldSelector{
|
|
APIVersion: "v1",
|
|
FieldPath: "metadata.namespace",
|
|
},
|
|
},
|
|
},
|
|
// Bucket env vars
|
|
{
|
|
Name: "LOGICAL_BACKUP_S3_BUCKET",
|
|
Value: c.OpConfig.LogicalBackup.LogicalBackupS3Bucket,
|
|
},
|
|
{
|
|
Name: "LOGICAL_BACKUP_S3_BUCKET_SCOPE_SUFFIX",
|
|
Value: getBucketScopeSuffix(string(c.Postgresql.GetUID())),
|
|
},
|
|
// Postgres env vars
|
|
{
|
|
Name: "PG_VERSION",
|
|
Value: c.Spec.PgVersion,
|
|
},
|
|
{
|
|
Name: "PGPORT",
|
|
Value: "5432",
|
|
},
|
|
{
|
|
Name: "PGUSER",
|
|
Value: c.OpConfig.SuperUsername,
|
|
},
|
|
{
|
|
Name: "PGDATABASE",
|
|
Value: c.OpConfig.SuperUsername,
|
|
},
|
|
{
|
|
Name: "PGSSLMODE",
|
|
Value: "require",
|
|
},
|
|
{
|
|
Name: "PGPASSWORD",
|
|
ValueFrom: &v1.EnvVarSource{
|
|
SecretKeyRef: &v1.SecretKeySelector{
|
|
LocalObjectReference: v1.LocalObjectReference{
|
|
Name: c.credentialSecretName(c.OpConfig.SuperUsername),
|
|
},
|
|
Key: "password",
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
c.logger.Debugf("Generated logical backup env vars %v", envVars)
|
|
|
|
return envVars
|
|
}
|
|
|
|
// getLogicalBackupJobName returns the name; the job itself may not exists
|
|
func (c *Cluster) getLogicalBackupJobName() (jobName string) {
|
|
return "logical-backup-" + c.clusterName().Name
|
|
}
|