292 lines
8.1 KiB
Go
292 lines
8.1 KiB
Go
package cluster
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import (
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"fmt"
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"k8s.io/client-go/pkg/api/v1"
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"k8s.io/client-go/pkg/apis/apps/v1beta1"
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"github.bus.zalan.do/acid/postgres-operator/pkg/spec"
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"github.bus.zalan.do/acid/postgres-operator/pkg/util"
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"github.bus.zalan.do/acid/postgres-operator/pkg/util/constants"
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"github.bus.zalan.do/acid/postgres-operator/pkg/util/k8sutil"
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"github.bus.zalan.do/acid/postgres-operator/pkg/util/resources"
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)
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var (
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deleteOptions = &v1.DeleteOptions{OrphanDependents: &orphanDependents}
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orphanDependents = false
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)
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func getStatefulSet(clusterName spec.ClusterName, cSpec spec.PostgresSpec, etcdHost, dockerImage string) *v1beta1.StatefulSet {
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volumeSize := cSpec.Volume.Size
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volumeStorageClass := cSpec.Volume.StorageClass
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resourceList := resources.ResourceList(cSpec.Resources)
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template := resources.PodTemplate(clusterName, resourceList, dockerImage, cSpec.Version, etcdHost)
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volumeClaimTemplate := resources.VolumeClaimTemplate(volumeSize, volumeStorageClass)
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return resources.StatefulSet(clusterName, template, volumeClaimTemplate, cSpec.NumberOfInstances)
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}
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func (c *Cluster) LoadResources() error {
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ns := c.Metadata.Namespace
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listOptions := v1.ListOptions{
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LabelSelector: c.labelsSet().String(),
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}
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services, err := c.config.KubeClient.Services(ns).List(listOptions)
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if err != nil {
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return fmt.Errorf("Can't get list of services: %s", err)
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}
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if len(services.Items) > 1 {
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return fmt.Errorf("Too many(%d) Services for a cluster", len(services.Items))
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}
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c.Service = &services.Items[0]
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endpoints, err := c.config.KubeClient.Endpoints(ns).List(listOptions)
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if err != nil {
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return fmt.Errorf("Can't get list of endpoints: %s", err)
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}
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if len(endpoints.Items) > 1 {
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return fmt.Errorf("Too many(%d) Endpoints for a cluster", len(endpoints.Items))
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}
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c.Endpoint = &endpoints.Items[0]
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secrets, err := c.config.KubeClient.Secrets(ns).List(listOptions)
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if err != nil {
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return fmt.Errorf("Can't get list of secrets: %s", err)
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}
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for i, secret := range secrets.Items {
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if _, ok := c.Secrets[secret.UID]; ok {
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continue
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}
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c.Secrets[secret.UID] = &secrets.Items[i]
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c.logger.Debugf("Secret loaded, uid: %s", secret.UID)
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}
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statefulSets, err := c.config.KubeClient.StatefulSets(ns).List(listOptions)
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if err != nil {
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return fmt.Errorf("Can't get list of stateful sets: %s", err)
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}
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if len(statefulSets.Items) > 1 {
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return fmt.Errorf("Too many(%d) StatefulSets for a cluster", len(statefulSets.Items))
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}
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c.Statefulset = &statefulSets.Items[0]
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return nil
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}
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func (c *Cluster) ListResources() error {
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c.logger.Infof("StatefulSet: %s (uid: %s)", util.NameFromMeta(c.Statefulset.ObjectMeta), c.Statefulset.UID)
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for _, obj := range c.Secrets {
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c.logger.Infof("Secret: %s (uid: %s)", util.NameFromMeta(obj.ObjectMeta), obj.UID)
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}
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c.logger.Infof("Endpoint: %s (uid: %s)", util.NameFromMeta(c.Endpoint.ObjectMeta), c.Endpoint.UID)
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c.logger.Infof("Service: %s (uid: %s)", util.NameFromMeta(c.Service.ObjectMeta), c.Service.UID)
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pods, err := c.clusterPods()
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if err != nil {
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return fmt.Errorf("Can't get pods: %s", err)
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}
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for _, obj := range pods {
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c.logger.Infof("Pod: %s (uid: %s)", util.NameFromMeta(obj.ObjectMeta), obj.UID)
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}
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return nil
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}
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func (c *Cluster) createStatefulSet() (*v1beta1.StatefulSet, error) {
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if c.Statefulset != nil {
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return nil, fmt.Errorf("StatefulSet already exists in the cluster")
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}
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statefulSetSpec := getStatefulSet(c.ClusterName(), c.Spec, c.etcdHost, c.dockerImage)
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statefulSet, err := c.config.KubeClient.StatefulSets(statefulSetSpec.Namespace).Create(statefulSetSpec)
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if k8sutil.ResourceAlreadyExists(err) {
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return nil, fmt.Errorf("StatefulSet '%s' already exists", util.NameFromMeta(statefulSetSpec.ObjectMeta))
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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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c.Statefulset = statefulSet
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c.logger.Debugf("Created new StatefulSet, uid: %s", statefulSet.UID)
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return statefulSet, nil
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}
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func (c *Cluster) updateStatefulSet(newStatefulSet *v1beta1.StatefulSet) error {
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if c.Statefulset == nil {
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return fmt.Errorf("There is no StatefulSet in the cluster")
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}
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statefulSet, err := c.config.KubeClient.StatefulSets(newStatefulSet.Namespace).Update(newStatefulSet)
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if err != nil {
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return err
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}
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c.Statefulset = statefulSet
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return nil
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}
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func (c *Cluster) deleteStatefulSet() error {
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if c.Statefulset == nil {
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return fmt.Errorf("There is no StatefulSet in the cluster")
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}
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err := c.config.KubeClient.StatefulSets(c.Statefulset.Namespace).Delete(c.Statefulset.Name, deleteOptions)
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if err != nil {
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return err
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}
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c.Statefulset = nil
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return nil
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}
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func (c *Cluster) createService() (*v1.Service, error) {
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if c.Service != nil {
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return nil, fmt.Errorf("Service already exists in the cluster")
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}
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serviceSpec := resources.Service(c.ClusterName(), c.Spec.AllowedSourceRanges)
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service, err := c.config.KubeClient.Services(serviceSpec.Namespace).Create(serviceSpec)
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if k8sutil.ResourceAlreadyExists(err) {
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return nil, fmt.Errorf("Service '%s' already exists", util.NameFromMeta(serviceSpec.ObjectMeta))
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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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c.Service = service
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return service, nil
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}
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func (c *Cluster) updateService(newService *v1.Service) error {
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if c.Service == nil {
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return fmt.Errorf("There is no Service in the cluster")
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}
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newService.ObjectMeta = c.Service.ObjectMeta
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newService.Spec.ClusterIP = c.Service.Spec.ClusterIP
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svc, err := c.config.KubeClient.Services(newService.Namespace).Update(newService)
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if err != nil {
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return err
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}
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c.Service = svc
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return nil
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}
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func (c *Cluster) deleteService() error {
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if c.Service == nil {
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return fmt.Errorf("There is no Service in the cluster")
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}
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err := c.config.KubeClient.Services(c.Service.Namespace).Delete(c.Service.Name, deleteOptions)
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if err != nil {
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return err
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}
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c.Service = nil
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return nil
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}
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func (c *Cluster) createEndpoint() (*v1.Endpoints, error) {
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if c.Endpoint != nil {
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return nil, fmt.Errorf("Endpoint already exists in the cluster")
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}
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endpointSpec := resources.Endpoint(c.ClusterName())
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endpoint, err := c.config.KubeClient.Endpoints(endpointSpec.Namespace).Create(endpointSpec)
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if k8sutil.ResourceAlreadyExists(err) {
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return nil, fmt.Errorf("Endpoint '%s' already exists", util.NameFromMeta(endpointSpec.ObjectMeta))
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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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c.Endpoint = endpoint
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return endpoint, nil
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}
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func (c *Cluster) updateEndpoint(newEndpoint *v1.Endpoints) error {
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//TODO: to be implemented
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return nil
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}
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func (c *Cluster) deleteEndpoint() error {
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if c.Endpoint == nil {
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return fmt.Errorf("There is no Endpoint in the cluster")
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}
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err := c.config.KubeClient.Endpoints(c.Endpoint.Namespace).Delete(c.Endpoint.Name, deleteOptions)
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if err != nil {
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return err
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}
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c.Endpoint = nil
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return nil
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}
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func (c *Cluster) applySecrets() error {
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secrets, err := resources.UserSecrets(c.ClusterName(), c.pgUsers)
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if err != nil {
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return fmt.Errorf("Can't get user secrets")
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}
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for secretUsername, secretSpec := range secrets {
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secret, err := c.config.KubeClient.Secrets(secretSpec.Namespace).Create(secretSpec)
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if k8sutil.ResourceAlreadyExists(err) {
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curSecrets, err := c.config.KubeClient.Secrets(secretSpec.Namespace).Get(secretSpec.Name)
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if err != nil {
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return fmt.Errorf("Can't get current secret: %s", err)
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}
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pwdUser := c.pgUsers[secretUsername]
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pwdUser.Password = string(curSecrets.Data["password"])
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c.pgUsers[secretUsername] = pwdUser
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continue
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} else {
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if err != nil {
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return fmt.Errorf("Can't create secret for user '%s': %s", secretUsername, err)
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}
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c.Secrets[secret.UID] = secret
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c.logger.Debugf("Created new secret, uid: %s", secret.UID)
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}
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}
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return nil
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}
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func (c *Cluster) deleteSecret(secret *v1.Secret) error {
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err := c.config.KubeClient.Secrets(secret.Namespace).Delete(secret.Name, deleteOptions)
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if err != nil {
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return err
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}
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delete(c.Secrets, secret.UID)
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return err
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}
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func (c *Cluster) createUsers() error {
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for username, user := range c.pgUsers {
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if username == constants.SuperuserName || username == constants.ReplicationUsername {
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continue
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}
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isHuman, err := c.createPgUser(user)
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var userType string
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if isHuman {
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userType = "human"
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} else {
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userType = "robot"
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}
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if err != nil {
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return fmt.Errorf("Can't create %s user '%s': %s", userType, username, err)
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}
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}
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return nil
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}
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