Critical operation PDB (#2830)
Create the second PDB to cover Pods with a special "critical operation" label set. This label is going to be assigned to all pg cluster's Pods by the Operator during a PG major version upgrade, by Patroni during a cluster/replica bootstrap. It can also be set manually or by any other automation tool.
This commit is contained in:
Polina Bungina
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commit
a56ecaace7
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@ -620,22 +620,34 @@ By default the topology key for the pod anti affinity is set to
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`kubernetes.io/hostname`, you can set another topology key e.g.
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`failure-domain.beta.kubernetes.io/zone`. See [built-in node labels](https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#interlude-built-in-node-labels) for available topology keys.
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## Pod Disruption Budget
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## Pod Disruption Budgets
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By default the operator uses a PodDisruptionBudget (PDB) to protect the cluster
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from voluntarily disruptions and hence unwanted DB downtime. The `MinAvailable`
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parameter of the PDB is set to `1` which prevents killing masters in single-node
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clusters and/or the last remaining running instance in a multi-node cluster.
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By default the operator creates two PodDisruptionBudgets (PDB) to protect the cluster
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from voluntarily disruptions and hence unwanted DB downtime: so-called primary PDB and
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and PDB for critical operations.
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### Primary PDB
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The `MinAvailable` parameter of this PDB is set to `1` and, if `pdb_master_label_selector`
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is enabled, label selector includes `spilo-role=master` condition, which prevents killing
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masters in single-node clusters and/or the last remaining running instance in a multi-node
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cluster.
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## PDB for critical operations
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The `MinAvailable` parameter of this PDB is equal to the `numberOfInstances` set in the
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cluster manifest, while label selector includes `critical-operation=true` condition. This
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allows to protect all pods of a cluster, given they are labeled accordingly.
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For example, Operator labels all Spilo pods with `critical-operation=true` during the major
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version upgrade run. You may want to protect cluster pods during other critical operations
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by assigning the label to pods yourself or using other means of automation.
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The PDB is only relaxed in two scenarios:
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* If a cluster is scaled down to `0` instances (e.g. for draining nodes)
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* If the PDB is disabled in the configuration (`enable_pod_disruption_budget`)
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The PDB is still in place having `MinAvailable` set to `0`. If enabled it will
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be automatically set to `1` on scale up. Disabling PDBs helps avoiding blocking
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Kubernetes upgrades in managed K8s environments at the cost of prolonged DB
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downtime. See PR [#384](https://github.com/zalando/postgres-operator/pull/384)
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The PDBs are still in place having `MinAvailable` set to `0`. Disabling PDBs
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helps avoiding blocking Kubernetes upgrades in managed K8s environments at the
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cost of prolonged DB downtime. See PR [#384](https://github.com/zalando/postgres-operator/pull/384)
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for the use case.
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## Add cluster-specific labels
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@ -230,7 +230,7 @@ kubectl delete postgresql acid-minimal-cluster
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```
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This should remove the associated StatefulSet, database Pods, Services and
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Endpoints. The PersistentVolumes are released and the PodDisruptionBudget is
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Endpoints. The PersistentVolumes are released and the PodDisruptionBudgets are
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deleted. Secrets however are not deleted and backups will remain in place.
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When deleting a cluster while it is still starting up or got stuck during that
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@ -334,13 +334,13 @@ configuration they are grouped under the `kubernetes` key.
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pod namespace).
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* **pdb_name_format**
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defines the template for PDB (Pod Disruption Budget) names created by the
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defines the template for primary PDB (Pod Disruption Budget) name created by the
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operator. The default is `postgres-{cluster}-pdb`, where `{cluster}` is
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replaced by the cluster name. Only the `{cluster}` placeholders is allowed in
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the template.
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* **pdb_master_label_selector**
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By default the PDB will match the master role hence preventing nodes to be
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By default the primary PDB will match the master role hence preventing nodes to be
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drained if the node_readiness_label is not used. If this option if set to
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`false` the `spilo-role=master` selector will not be added to the PDB.
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@ -2547,7 +2547,10 @@ class EndToEndTestCase(unittest.TestCase):
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self.assertTrue(self.has_postgresql_owner_reference(config_ep.metadata.owner_references, inverse), "config endpoint owner reference check failed")
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pdb = k8s.api.policy_v1.read_namespaced_pod_disruption_budget("postgres-{}-pdb".format(cluster_name), cluster_namespace)
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self.assertTrue(self.has_postgresql_owner_reference(pdb.metadata.owner_references, inverse), "pod disruption owner reference check failed")
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self.assertTrue(self.has_postgresql_owner_reference(pdb.metadata.owner_references, inverse), "primary pod disruption budget owner reference check failed")
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pdb = k8s.api.policy_v1.read_namespaced_pod_disruption_budget("postgres-{}-critical-op-pdb".format(cluster_name), cluster_namespace)
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self.assertTrue(self.has_postgresql_owner_reference(pdb.metadata.owner_references, inverse), "pod disruption budget for critical operations owner reference check failed")
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pg_secret = k8s.api.core_v1.read_namespaced_secret("postgres.{}.credentials.postgresql.acid.zalan.do".format(cluster_name), cluster_namespace)
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self.assertTrue(self.has_postgresql_owner_reference(pg_secret.metadata.owner_references, inverse), "postgres secret owner reference check failed")
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@ -59,16 +59,17 @@ type Config struct {
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}
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type kubeResources struct {
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Services map[PostgresRole]*v1.Service
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Endpoints map[PostgresRole]*v1.Endpoints
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PatroniEndpoints map[string]*v1.Endpoints
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PatroniConfigMaps map[string]*v1.ConfigMap
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Secrets map[types.UID]*v1.Secret
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Statefulset *appsv1.StatefulSet
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VolumeClaims map[types.UID]*v1.PersistentVolumeClaim
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PodDisruptionBudget *policyv1.PodDisruptionBudget
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LogicalBackupJob *batchv1.CronJob
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Streams map[string]*zalandov1.FabricEventStream
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Services map[PostgresRole]*v1.Service
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Endpoints map[PostgresRole]*v1.Endpoints
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PatroniEndpoints map[string]*v1.Endpoints
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PatroniConfigMaps map[string]*v1.ConfigMap
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Secrets map[types.UID]*v1.Secret
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Statefulset *appsv1.StatefulSet
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VolumeClaims map[types.UID]*v1.PersistentVolumeClaim
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PrimaryPodDisruptionBudget *policyv1.PodDisruptionBudget
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CriticalOpPodDisruptionBudget *policyv1.PodDisruptionBudget
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LogicalBackupJob *batchv1.CronJob
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Streams map[string]*zalandov1.FabricEventStream
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//Pods are treated separately
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}
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@ -343,14 +344,10 @@ func (c *Cluster) Create() (err error) {
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c.logger.Infof("secrets have been successfully created")
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c.eventRecorder.Event(c.GetReference(), v1.EventTypeNormal, "Secrets", "The secrets have been successfully created")
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if c.PodDisruptionBudget != nil {
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return fmt.Errorf("pod disruption budget already exists in the cluster")
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if err = c.createPodDisruptionBudgets(); err != nil {
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return fmt.Errorf("could not create pod disruption budgets: %v", err)
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}
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pdb, err := c.createPodDisruptionBudget()
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if err != nil {
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return fmt.Errorf("could not create pod disruption budget: %v", err)
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}
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c.logger.Infof("pod disruption budget %q has been successfully created", util.NameFromMeta(pdb.ObjectMeta))
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c.logger.Info("pod disruption budgets have been successfully created")
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if c.Statefulset != nil {
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return fmt.Errorf("statefulset already exists in the cluster")
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@ -1081,9 +1078,9 @@ func (c *Cluster) Update(oldSpec, newSpec *acidv1.Postgresql) error {
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}
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}
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// pod disruption budget
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if err := c.syncPodDisruptionBudget(true); err != nil {
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c.logger.Errorf("could not sync pod disruption budget: %v", err)
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// pod disruption budgets
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if err := c.syncPodDisruptionBudgets(true); err != nil {
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c.logger.Errorf("could not sync pod disruption budgets: %v", err)
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updateFailed = true
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}
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@ -1228,10 +1225,10 @@ func (c *Cluster) Delete() error {
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c.logger.Info("not deleting secrets because disabled in configuration")
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}
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if err := c.deletePodDisruptionBudget(); err != nil {
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if err := c.deletePodDisruptionBudgets(); err != nil {
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anyErrors = true
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c.logger.Warningf("could not delete pod disruption budget: %v", err)
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c.eventRecorder.Eventf(c.GetReference(), v1.EventTypeWarning, "Delete", "could not delete pod disruption budget: %v", err)
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c.logger.Warningf("could not delete pod disruption budgets: %v", err)
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c.eventRecorder.Eventf(c.GetReference(), v1.EventTypeWarning, "Delete", "could not delete pod disruption budgets: %v", err)
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}
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for _, role := range []PostgresRole{Master, Replica} {
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@ -1730,16 +1727,17 @@ func (c *Cluster) GetCurrentProcess() Process {
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// GetStatus provides status of the cluster
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func (c *Cluster) GetStatus() *ClusterStatus {
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status := &ClusterStatus{
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Cluster: c.Name,
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Namespace: c.Namespace,
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Team: c.Spec.TeamID,
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Status: c.Status,
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Spec: c.Spec,
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MasterService: c.GetServiceMaster(),
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ReplicaService: c.GetServiceReplica(),
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StatefulSet: c.GetStatefulSet(),
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PodDisruptionBudget: c.GetPodDisruptionBudget(),
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CurrentProcess: c.GetCurrentProcess(),
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Cluster: c.Name,
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Namespace: c.Namespace,
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Team: c.Spec.TeamID,
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Status: c.Status,
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Spec: c.Spec,
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MasterService: c.GetServiceMaster(),
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ReplicaService: c.GetServiceReplica(),
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StatefulSet: c.GetStatefulSet(),
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PrimaryPodDisruptionBudget: c.GetPrimaryPodDisruptionBudget(),
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CriticalOpPodDisruptionBudget: c.GetCriticalOpPodDisruptionBudget(),
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CurrentProcess: c.GetCurrentProcess(),
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Error: fmt.Errorf("error: %s", c.Error),
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}
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@ -109,10 +109,15 @@ func (c *Cluster) servicePort(role PostgresRole) int32 {
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return pgPort
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}
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func (c *Cluster) podDisruptionBudgetName() string {
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func (c *Cluster) PrimaryPodDisruptionBudgetName() string {
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return c.OpConfig.PDBNameFormat.Format("cluster", c.Name)
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}
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func (c *Cluster) criticalOpPodDisruptionBudgetName() string {
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pdbTemplate := config.StringTemplate("postgres-{cluster}-critical-op-pdb")
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return pdbTemplate.Format("cluster", c.Name)
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}
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func makeDefaultResources(config *config.Config) acidv1.Resources {
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defaultRequests := acidv1.ResourceDescription{
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@ -2207,7 +2212,7 @@ func (c *Cluster) generateStandbyEnvironment(description *acidv1.StandbyDescript
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return result
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}
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func (c *Cluster) generatePodDisruptionBudget() *policyv1.PodDisruptionBudget {
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func (c *Cluster) generatePrimaryPodDisruptionBudget() *policyv1.PodDisruptionBudget {
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minAvailable := intstr.FromInt(1)
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pdbEnabled := c.OpConfig.EnablePodDisruptionBudget
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pdbMasterLabelSelector := c.OpConfig.PDBMasterLabelSelector
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@ -2225,7 +2230,36 @@ func (c *Cluster) generatePodDisruptionBudget() *policyv1.PodDisruptionBudget {
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return &policyv1.PodDisruptionBudget{
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ObjectMeta: metav1.ObjectMeta{
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Name: c.podDisruptionBudgetName(),
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Name: c.PrimaryPodDisruptionBudgetName(),
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Namespace: c.Namespace,
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Labels: c.labelsSet(true),
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Annotations: c.annotationsSet(nil),
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OwnerReferences: c.ownerReferences(),
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},
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Spec: policyv1.PodDisruptionBudgetSpec{
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MinAvailable: &minAvailable,
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Selector: &metav1.LabelSelector{
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MatchLabels: labels,
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},
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},
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}
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}
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func (c *Cluster) generateCriticalOpPodDisruptionBudget() *policyv1.PodDisruptionBudget {
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minAvailable := intstr.FromInt32(c.Spec.NumberOfInstances)
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pdbEnabled := c.OpConfig.EnablePodDisruptionBudget
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// if PodDisruptionBudget is disabled or if there are no DB pods, set the budget to 0.
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if (pdbEnabled != nil && !(*pdbEnabled)) || c.Spec.NumberOfInstances <= 0 {
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minAvailable = intstr.FromInt(0)
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}
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labels := c.labelsSet(false)
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labels["critical-operation"] = "true"
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return &policyv1.PodDisruptionBudget{
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ObjectMeta: metav1.ObjectMeta{
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Name: c.criticalOpPodDisruptionBudgetName(),
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Namespace: c.Namespace,
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Labels: c.labelsSet(true),
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Annotations: c.annotationsSet(nil),
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@ -2349,22 +2349,34 @@ func TestGeneratePodDisruptionBudget(t *testing.T) {
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}
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}
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testLabelsAndSelectors := func(cluster *Cluster, podDisruptionBudget *policyv1.PodDisruptionBudget) error {
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masterLabelSelectorDisabled := cluster.OpConfig.PDBMasterLabelSelector != nil && !*cluster.OpConfig.PDBMasterLabelSelector
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if podDisruptionBudget.ObjectMeta.Namespace != "myapp" {
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return fmt.Errorf("Object Namespace incorrect.")
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}
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if !reflect.DeepEqual(podDisruptionBudget.Labels, map[string]string{"team": "myapp", "cluster-name": "myapp-database"}) {
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return fmt.Errorf("Labels incorrect.")
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}
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if !masterLabelSelectorDisabled &&
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!reflect.DeepEqual(podDisruptionBudget.Spec.Selector, &metav1.LabelSelector{
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MatchLabels: map[string]string{"spilo-role": "master", "cluster-name": "myapp-database"}}) {
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testLabelsAndSelectors := func(isPrimary bool) func(cluster *Cluster, podDisruptionBudget *policyv1.PodDisruptionBudget) error {
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return func(cluster *Cluster, podDisruptionBudget *policyv1.PodDisruptionBudget) error {
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masterLabelSelectorDisabled := cluster.OpConfig.PDBMasterLabelSelector != nil && !*cluster.OpConfig.PDBMasterLabelSelector
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if podDisruptionBudget.ObjectMeta.Namespace != "myapp" {
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return fmt.Errorf("Object Namespace incorrect.")
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}
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expectedLabels := map[string]string{"team": "myapp", "cluster-name": "myapp-database"}
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if !reflect.DeepEqual(podDisruptionBudget.Labels, expectedLabels) {
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return fmt.Errorf("Labels incorrect, got %#v, expected %#v", podDisruptionBudget.Labels, expectedLabels)
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}
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if !masterLabelSelectorDisabled {
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if isPrimary {
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expectedLabels := &metav1.LabelSelector{
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MatchLabels: map[string]string{"spilo-role": "master", "cluster-name": "myapp-database"}}
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if !reflect.DeepEqual(podDisruptionBudget.Spec.Selector, expectedLabels) {
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return fmt.Errorf("MatchLabels incorrect, got %#v, expected %#v", podDisruptionBudget.Spec.Selector, expectedLabels)
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}
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} else {
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expectedLabels := &metav1.LabelSelector{
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MatchLabels: map[string]string{"cluster-name": "myapp-database", "critical-operation": "true"}}
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if !reflect.DeepEqual(podDisruptionBudget.Spec.Selector, expectedLabels) {
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return fmt.Errorf("MatchLabels incorrect, got %#v, expected %#v", podDisruptionBudget.Spec.Selector, expectedLabels)
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}
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}
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}
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return fmt.Errorf("MatchLabels incorrect.")
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return nil
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}
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return nil
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}
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testPodDisruptionBudgetOwnerReference := func(cluster *Cluster, podDisruptionBudget *policyv1.PodDisruptionBudget) error {
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@ -2400,7 +2412,7 @@ func TestGeneratePodDisruptionBudget(t *testing.T) {
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testPodDisruptionBudgetOwnerReference,
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hasName("postgres-myapp-database-pdb"),
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hasMinAvailable(1),
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testLabelsAndSelectors,
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testLabelsAndSelectors(true),
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},
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},
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{
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@ -2417,7 +2429,7 @@ func TestGeneratePodDisruptionBudget(t *testing.T) {
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testPodDisruptionBudgetOwnerReference,
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hasName("postgres-myapp-database-pdb"),
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hasMinAvailable(0),
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testLabelsAndSelectors,
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testLabelsAndSelectors(true),
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},
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},
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{
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@ -2434,7 +2446,7 @@ func TestGeneratePodDisruptionBudget(t *testing.T) {
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testPodDisruptionBudgetOwnerReference,
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hasName("postgres-myapp-database-pdb"),
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hasMinAvailable(0),
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testLabelsAndSelectors,
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testLabelsAndSelectors(true),
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},
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},
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{
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@ -2451,7 +2463,7 @@ func TestGeneratePodDisruptionBudget(t *testing.T) {
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testPodDisruptionBudgetOwnerReference,
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hasName("postgres-myapp-database-databass-budget"),
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hasMinAvailable(1),
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testLabelsAndSelectors,
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testLabelsAndSelectors(true),
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},
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},
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{
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@ -2468,7 +2480,7 @@ func TestGeneratePodDisruptionBudget(t *testing.T) {
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testPodDisruptionBudgetOwnerReference,
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hasName("postgres-myapp-database-pdb"),
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hasMinAvailable(1),
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testLabelsAndSelectors,
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testLabelsAndSelectors(true),
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},
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},
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{
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@ -2485,13 +2497,99 @@ func TestGeneratePodDisruptionBudget(t *testing.T) {
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testPodDisruptionBudgetOwnerReference,
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hasName("postgres-myapp-database-pdb"),
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hasMinAvailable(1),
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testLabelsAndSelectors,
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testLabelsAndSelectors(true),
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},
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},
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}
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for _, tt := range tests {
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result := tt.spec.generatePodDisruptionBudget()
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result := tt.spec.generatePrimaryPodDisruptionBudget()
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for _, check := range tt.check {
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err := check(tt.spec, result)
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if err != nil {
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t.Errorf("%s [%s]: PodDisruptionBudget spec is incorrect, %+v",
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testName, tt.scenario, err)
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}
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}
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}
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testCriticalOp := []struct {
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scenario string
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spec *Cluster
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check []func(cluster *Cluster, podDisruptionBudget *policyv1.PodDisruptionBudget) error
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}{
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{
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scenario: "With multiple instances",
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spec: New(
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Config{OpConfig: config.Config{Resources: config.Resources{ClusterNameLabel: "cluster-name", PodRoleLabel: "spilo-role"}, PDBNameFormat: "postgres-{cluster}-pdb"}},
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k8sutil.KubernetesClient{},
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acidv1.Postgresql{
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ObjectMeta: metav1.ObjectMeta{Name: "myapp-database", Namespace: "myapp"},
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Spec: acidv1.PostgresSpec{TeamID: "myapp", NumberOfInstances: 3}},
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logger,
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eventRecorder),
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check: []func(cluster *Cluster, podDisruptionBudget *policyv1.PodDisruptionBudget) error{
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testPodDisruptionBudgetOwnerReference,
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hasName("postgres-myapp-database-critical-op-pdb"),
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hasMinAvailable(3),
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testLabelsAndSelectors(false),
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},
|
||||
},
|
||||
{
|
||||
scenario: "With zero instances",
|
||||
spec: New(
|
||||
Config{OpConfig: config.Config{Resources: config.Resources{ClusterNameLabel: "cluster-name", PodRoleLabel: "spilo-role"}, PDBNameFormat: "postgres-{cluster}-pdb"}},
|
||||
k8sutil.KubernetesClient{},
|
||||
acidv1.Postgresql{
|
||||
ObjectMeta: metav1.ObjectMeta{Name: "myapp-database", Namespace: "myapp"},
|
||||
Spec: acidv1.PostgresSpec{TeamID: "myapp", NumberOfInstances: 0}},
|
||||
logger,
|
||||
eventRecorder),
|
||||
check: []func(cluster *Cluster, podDisruptionBudget *policyv1.PodDisruptionBudget) error{
|
||||
testPodDisruptionBudgetOwnerReference,
|
||||
hasName("postgres-myapp-database-critical-op-pdb"),
|
||||
hasMinAvailable(0),
|
||||
testLabelsAndSelectors(false),
|
||||
},
|
||||
},
|
||||
{
|
||||
scenario: "With PodDisruptionBudget disabled",
|
||||
spec: New(
|
||||
Config{OpConfig: config.Config{Resources: config.Resources{ClusterNameLabel: "cluster-name", PodRoleLabel: "spilo-role"}, PDBNameFormat: "postgres-{cluster}-pdb", EnablePodDisruptionBudget: util.False()}},
|
||||
k8sutil.KubernetesClient{},
|
||||
acidv1.Postgresql{
|
||||
ObjectMeta: metav1.ObjectMeta{Name: "myapp-database", Namespace: "myapp"},
|
||||
Spec: acidv1.PostgresSpec{TeamID: "myapp", NumberOfInstances: 3}},
|
||||
logger,
|
||||
eventRecorder),
|
||||
check: []func(cluster *Cluster, podDisruptionBudget *policyv1.PodDisruptionBudget) error{
|
||||
testPodDisruptionBudgetOwnerReference,
|
||||
hasName("postgres-myapp-database-critical-op-pdb"),
|
||||
hasMinAvailable(0),
|
||||
testLabelsAndSelectors(false),
|
||||
},
|
||||
},
|
||||
{
|
||||
scenario: "With OwnerReference enabled",
|
||||
spec: New(
|
||||
Config{OpConfig: config.Config{Resources: config.Resources{ClusterNameLabel: "cluster-name", PodRoleLabel: "spilo-role", EnableOwnerReferences: util.True()}, PDBNameFormat: "postgres-{cluster}-pdb", EnablePodDisruptionBudget: util.True()}},
|
||||
k8sutil.KubernetesClient{},
|
||||
acidv1.Postgresql{
|
||||
ObjectMeta: metav1.ObjectMeta{Name: "myapp-database", Namespace: "myapp"},
|
||||
Spec: acidv1.PostgresSpec{TeamID: "myapp", NumberOfInstances: 3}},
|
||||
logger,
|
||||
eventRecorder),
|
||||
check: []func(cluster *Cluster, podDisruptionBudget *policyv1.PodDisruptionBudget) error{
|
||||
testPodDisruptionBudgetOwnerReference,
|
||||
hasName("postgres-myapp-database-critical-op-pdb"),
|
||||
hasMinAvailable(3),
|
||||
testLabelsAndSelectors(false),
|
||||
},
|
||||
},
|
||||
}
|
||||
|
||||
for _, tt := range testCriticalOp {
|
||||
result := tt.spec.generateCriticalOpPodDisruptionBudget()
|
||||
for _, check := range tt.check {
|
||||
err := check(tt.spec, result)
|
||||
if err != nil {
|
||||
|
|
|
|||
|
|
@ -23,8 +23,13 @@ const (
|
|||
)
|
||||
|
||||
func (c *Cluster) listResources() error {
|
||||
if c.PodDisruptionBudget != nil {
|
||||
c.logger.Infof("found pod disruption budget: %q (uid: %q)", util.NameFromMeta(c.PodDisruptionBudget.ObjectMeta), c.PodDisruptionBudget.UID)
|
||||
if c.PrimaryPodDisruptionBudget != nil {
|
||||
c.logger.Infof("found primary pod disruption budget: %q (uid: %q)", util.NameFromMeta(c.PrimaryPodDisruptionBudget.ObjectMeta), c.PrimaryPodDisruptionBudget.UID)
|
||||
}
|
||||
|
||||
if c.CriticalOpPodDisruptionBudget != nil {
|
||||
c.logger.Infof("found pod disruption budget for critical operations: %q (uid: %q)", util.NameFromMeta(c.CriticalOpPodDisruptionBudget.ObjectMeta), c.CriticalOpPodDisruptionBudget.UID)
|
||||
|
||||
}
|
||||
|
||||
if c.Statefulset != nil {
|
||||
|
|
@ -417,59 +422,128 @@ func (c *Cluster) generateEndpointSubsets(role PostgresRole) []v1.EndpointSubset
|
|||
return result
|
||||
}
|
||||
|
||||
func (c *Cluster) createPodDisruptionBudget() (*policyv1.PodDisruptionBudget, error) {
|
||||
podDisruptionBudgetSpec := c.generatePodDisruptionBudget()
|
||||
func (c *Cluster) createPrimaryPodDisruptionBudget() error {
|
||||
c.logger.Debug("creating primary pod disruption budget")
|
||||
if c.PrimaryPodDisruptionBudget != nil {
|
||||
c.logger.Warning("primary pod disruption budget already exists in the cluster")
|
||||
return nil
|
||||
}
|
||||
|
||||
podDisruptionBudgetSpec := c.generatePrimaryPodDisruptionBudget()
|
||||
podDisruptionBudget, err := c.KubeClient.
|
||||
PodDisruptionBudgets(podDisruptionBudgetSpec.Namespace).
|
||||
Create(context.TODO(), podDisruptionBudgetSpec, metav1.CreateOptions{})
|
||||
|
||||
if err != nil {
|
||||
return nil, err
|
||||
return err
|
||||
}
|
||||
c.PodDisruptionBudget = podDisruptionBudget
|
||||
c.logger.Infof("primary pod disruption budget %q has been successfully created", util.NameFromMeta(podDisruptionBudget.ObjectMeta))
|
||||
c.PrimaryPodDisruptionBudget = podDisruptionBudget
|
||||
|
||||
return podDisruptionBudget, nil
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *Cluster) updatePodDisruptionBudget(pdb *policyv1.PodDisruptionBudget) error {
|
||||
if c.PodDisruptionBudget == nil {
|
||||
return fmt.Errorf("there is no pod disruption budget in the cluster")
|
||||
func (c *Cluster) createCriticalOpPodDisruptionBudget() error {
|
||||
c.logger.Debug("creating pod disruption budget for critical operations")
|
||||
if c.CriticalOpPodDisruptionBudget != nil {
|
||||
c.logger.Warning("pod disruption budget for critical operations already exists in the cluster")
|
||||
return nil
|
||||
}
|
||||
|
||||
if err := c.deletePodDisruptionBudget(); err != nil {
|
||||
return fmt.Errorf("could not delete pod disruption budget: %v", err)
|
||||
podDisruptionBudgetSpec := c.generateCriticalOpPodDisruptionBudget()
|
||||
podDisruptionBudget, err := c.KubeClient.
|
||||
PodDisruptionBudgets(podDisruptionBudgetSpec.Namespace).
|
||||
Create(context.TODO(), podDisruptionBudgetSpec, metav1.CreateOptions{})
|
||||
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
c.logger.Infof("pod disruption budget for critical operations %q has been successfully created", util.NameFromMeta(podDisruptionBudget.ObjectMeta))
|
||||
c.CriticalOpPodDisruptionBudget = podDisruptionBudget
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *Cluster) createPodDisruptionBudgets() error {
|
||||
errors := make([]string, 0)
|
||||
|
||||
err := c.createPrimaryPodDisruptionBudget()
|
||||
if err != nil {
|
||||
errors = append(errors, fmt.Sprintf("could not create primary pod disruption budget: %v", err))
|
||||
}
|
||||
|
||||
err = c.createCriticalOpPodDisruptionBudget()
|
||||
if err != nil {
|
||||
errors = append(errors, fmt.Sprintf("could not create pod disruption budget for critical operations: %v", err))
|
||||
}
|
||||
|
||||
if len(errors) > 0 {
|
||||
return fmt.Errorf("%v", strings.Join(errors, `', '`))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *Cluster) updatePrimaryPodDisruptionBudget(pdb *policyv1.PodDisruptionBudget) error {
|
||||
c.logger.Debug("updating primary pod disruption budget")
|
||||
if c.PrimaryPodDisruptionBudget == nil {
|
||||
return fmt.Errorf("there is no primary pod disruption budget in the cluster")
|
||||
}
|
||||
|
||||
if err := c.deletePrimaryPodDisruptionBudget(); err != nil {
|
||||
return fmt.Errorf("could not delete primary pod disruption budget: %v", err)
|
||||
}
|
||||
|
||||
newPdb, err := c.KubeClient.
|
||||
PodDisruptionBudgets(pdb.Namespace).
|
||||
Create(context.TODO(), pdb, metav1.CreateOptions{})
|
||||
if err != nil {
|
||||
return fmt.Errorf("could not create pod disruption budget: %v", err)
|
||||
return fmt.Errorf("could not create primary pod disruption budget: %v", err)
|
||||
}
|
||||
c.PodDisruptionBudget = newPdb
|
||||
c.PrimaryPodDisruptionBudget = newPdb
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *Cluster) deletePodDisruptionBudget() error {
|
||||
c.logger.Debug("deleting pod disruption budget")
|
||||
if c.PodDisruptionBudget == nil {
|
||||
c.logger.Debug("there is no pod disruption budget in the cluster")
|
||||
func (c *Cluster) updateCriticalOpPodDisruptionBudget(pdb *policyv1.PodDisruptionBudget) error {
|
||||
c.logger.Debug("updating pod disruption budget for critical operations")
|
||||
if c.CriticalOpPodDisruptionBudget == nil {
|
||||
return fmt.Errorf("there is no pod disruption budget for critical operations in the cluster")
|
||||
}
|
||||
|
||||
if err := c.deleteCriticalOpPodDisruptionBudget(); err != nil {
|
||||
return fmt.Errorf("could not delete pod disruption budget for critical operations: %v", err)
|
||||
}
|
||||
|
||||
newPdb, err := c.KubeClient.
|
||||
PodDisruptionBudgets(pdb.Namespace).
|
||||
Create(context.TODO(), pdb, metav1.CreateOptions{})
|
||||
if err != nil {
|
||||
return fmt.Errorf("could not create pod disruption budget for critical operations: %v", err)
|
||||
}
|
||||
c.CriticalOpPodDisruptionBudget = newPdb
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *Cluster) deletePrimaryPodDisruptionBudget() error {
|
||||
c.logger.Debug("deleting primary pod disruption budget")
|
||||
if c.PrimaryPodDisruptionBudget == nil {
|
||||
c.logger.Debug("there is no primary pod disruption budget in the cluster")
|
||||
return nil
|
||||
}
|
||||
|
||||
pdbName := util.NameFromMeta(c.PodDisruptionBudget.ObjectMeta)
|
||||
pdbName := util.NameFromMeta(c.PrimaryPodDisruptionBudget.ObjectMeta)
|
||||
err := c.KubeClient.
|
||||
PodDisruptionBudgets(c.PodDisruptionBudget.Namespace).
|
||||
Delete(context.TODO(), c.PodDisruptionBudget.Name, c.deleteOptions)
|
||||
PodDisruptionBudgets(c.PrimaryPodDisruptionBudget.Namespace).
|
||||
Delete(context.TODO(), c.PrimaryPodDisruptionBudget.Name, c.deleteOptions)
|
||||
if k8sutil.ResourceNotFound(err) {
|
||||
c.logger.Debugf("PodDisruptionBudget %q has already been deleted", util.NameFromMeta(c.PodDisruptionBudget.ObjectMeta))
|
||||
c.logger.Debugf("PodDisruptionBudget %q has already been deleted", util.NameFromMeta(c.PrimaryPodDisruptionBudget.ObjectMeta))
|
||||
} else if err != nil {
|
||||
return fmt.Errorf("could not delete PodDisruptionBudget: %v", err)
|
||||
return fmt.Errorf("could not delete primary pod disruption budget: %v", err)
|
||||
}
|
||||
|
||||
c.logger.Infof("pod disruption budget %q has been deleted", util.NameFromMeta(c.PodDisruptionBudget.ObjectMeta))
|
||||
c.PodDisruptionBudget = nil
|
||||
c.logger.Infof("pod disruption budget %q has been deleted", util.NameFromMeta(c.PrimaryPodDisruptionBudget.ObjectMeta))
|
||||
c.PrimaryPodDisruptionBudget = nil
|
||||
|
||||
err = retryutil.Retry(c.OpConfig.ResourceCheckInterval, c.OpConfig.ResourceCheckTimeout,
|
||||
func() (bool, error) {
|
||||
|
|
@ -483,12 +557,67 @@ func (c *Cluster) deletePodDisruptionBudget() error {
|
|||
return false, err2
|
||||
})
|
||||
if err != nil {
|
||||
return fmt.Errorf("could not delete pod disruption budget: %v", err)
|
||||
return fmt.Errorf("could not delete primary pod disruption budget: %v", err)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *Cluster) deleteCriticalOpPodDisruptionBudget() error {
|
||||
c.logger.Debug("deleting pod disruption budget for critical operations")
|
||||
if c.CriticalOpPodDisruptionBudget == nil {
|
||||
c.logger.Debug("there is no pod disruption budget for critical operations in the cluster")
|
||||
return nil
|
||||
}
|
||||
|
||||
pdbName := util.NameFromMeta(c.CriticalOpPodDisruptionBudget.ObjectMeta)
|
||||
err := c.KubeClient.
|
||||
PodDisruptionBudgets(c.CriticalOpPodDisruptionBudget.Namespace).
|
||||
Delete(context.TODO(), c.CriticalOpPodDisruptionBudget.Name, c.deleteOptions)
|
||||
if k8sutil.ResourceNotFound(err) {
|
||||
c.logger.Debugf("PodDisruptionBudget %q has already been deleted", util.NameFromMeta(c.CriticalOpPodDisruptionBudget.ObjectMeta))
|
||||
} else if err != nil {
|
||||
return fmt.Errorf("could not delete pod disruption budget for critical operations: %v", err)
|
||||
}
|
||||
|
||||
c.logger.Infof("pod disruption budget %q has been deleted", util.NameFromMeta(c.CriticalOpPodDisruptionBudget.ObjectMeta))
|
||||
c.CriticalOpPodDisruptionBudget = nil
|
||||
|
||||
err = retryutil.Retry(c.OpConfig.ResourceCheckInterval, c.OpConfig.ResourceCheckTimeout,
|
||||
func() (bool, error) {
|
||||
_, err2 := c.KubeClient.PodDisruptionBudgets(pdbName.Namespace).Get(context.TODO(), pdbName.Name, metav1.GetOptions{})
|
||||
if err2 == nil {
|
||||
return false, nil
|
||||
}
|
||||
if k8sutil.ResourceNotFound(err2) {
|
||||
return true, nil
|
||||
}
|
||||
return false, err2
|
||||
})
|
||||
if err != nil {
|
||||
return fmt.Errorf("could not delete pod disruption budget for critical operations: %v", err)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *Cluster) deletePodDisruptionBudgets() error {
|
||||
errors := make([]string, 0)
|
||||
|
||||
if err := c.deletePrimaryPodDisruptionBudget(); err != nil {
|
||||
errors = append(errors, fmt.Sprintf("%v", err))
|
||||
}
|
||||
|
||||
if err := c.deleteCriticalOpPodDisruptionBudget(); err != nil {
|
||||
errors = append(errors, fmt.Sprintf("%v", err))
|
||||
}
|
||||
|
||||
if len(errors) > 0 {
|
||||
return fmt.Errorf("%v", strings.Join(errors, `', '`))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *Cluster) deleteEndpoint(role PostgresRole) error {
|
||||
c.setProcessName("deleting endpoint")
|
||||
c.logger.Debugf("deleting %s endpoint", role)
|
||||
|
|
@ -705,7 +834,12 @@ func (c *Cluster) GetStatefulSet() *appsv1.StatefulSet {
|
|||
return c.Statefulset
|
||||
}
|
||||
|
||||
// GetPodDisruptionBudget returns cluster's kubernetes PodDisruptionBudget
|
||||
func (c *Cluster) GetPodDisruptionBudget() *policyv1.PodDisruptionBudget {
|
||||
return c.PodDisruptionBudget
|
||||
// GetPrimaryPodDisruptionBudget returns cluster's primary kubernetes PodDisruptionBudget
|
||||
func (c *Cluster) GetPrimaryPodDisruptionBudget() *policyv1.PodDisruptionBudget {
|
||||
return c.PrimaryPodDisruptionBudget
|
||||
}
|
||||
|
||||
// GetCriticalOpPodDisruptionBudget returns cluster's kubernetes PodDisruptionBudget for critical operations
|
||||
func (c *Cluster) GetCriticalOpPodDisruptionBudget() *policyv1.PodDisruptionBudget {
|
||||
return c.CriticalOpPodDisruptionBudget
|
||||
}
|
||||
|
|
|
|||
|
|
@ -117,8 +117,8 @@ func (c *Cluster) Sync(newSpec *acidv1.Postgresql) error {
|
|||
}
|
||||
|
||||
c.logger.Debug("syncing pod disruption budgets")
|
||||
if err = c.syncPodDisruptionBudget(false); err != nil {
|
||||
err = fmt.Errorf("could not sync pod disruption budget: %v", err)
|
||||
if err = c.syncPodDisruptionBudgets(false); err != nil {
|
||||
err = fmt.Errorf("could not sync pod disruption budgets: %v", err)
|
||||
return err
|
||||
}
|
||||
|
||||
|
|
@ -452,22 +452,22 @@ func (c *Cluster) syncEndpoint(role PostgresRole) error {
|
|||
return nil
|
||||
}
|
||||
|
||||
func (c *Cluster) syncPodDisruptionBudget(isUpdate bool) error {
|
||||
func (c *Cluster) syncPrimaryPodDisruptionBudget(isUpdate bool) error {
|
||||
var (
|
||||
pdb *policyv1.PodDisruptionBudget
|
||||
err error
|
||||
)
|
||||
if pdb, err = c.KubeClient.PodDisruptionBudgets(c.Namespace).Get(context.TODO(), c.podDisruptionBudgetName(), metav1.GetOptions{}); err == nil {
|
||||
c.PodDisruptionBudget = pdb
|
||||
newPDB := c.generatePodDisruptionBudget()
|
||||
if pdb, err = c.KubeClient.PodDisruptionBudgets(c.Namespace).Get(context.TODO(), c.PrimaryPodDisruptionBudgetName(), metav1.GetOptions{}); err == nil {
|
||||
c.PrimaryPodDisruptionBudget = pdb
|
||||
newPDB := c.generatePrimaryPodDisruptionBudget()
|
||||
match, reason := c.comparePodDisruptionBudget(pdb, newPDB)
|
||||
if !match {
|
||||
c.logPDBChanges(pdb, newPDB, isUpdate, reason)
|
||||
if err = c.updatePodDisruptionBudget(newPDB); err != nil {
|
||||
if err = c.updatePrimaryPodDisruptionBudget(newPDB); err != nil {
|
||||
return err
|
||||
}
|
||||
} else {
|
||||
c.PodDisruptionBudget = pdb
|
||||
c.PrimaryPodDisruptionBudget = pdb
|
||||
}
|
||||
return nil
|
||||
|
||||
|
|
@ -476,21 +476,74 @@ func (c *Cluster) syncPodDisruptionBudget(isUpdate bool) error {
|
|||
return fmt.Errorf("could not get pod disruption budget: %v", err)
|
||||
}
|
||||
// no existing pod disruption budget, create new one
|
||||
c.logger.Infof("could not find the cluster's pod disruption budget")
|
||||
c.logger.Infof("could not find the primary pod disruption budget")
|
||||
|
||||
if pdb, err = c.createPodDisruptionBudget(); err != nil {
|
||||
if err = c.createPrimaryPodDisruptionBudget(); err != nil {
|
||||
if !k8sutil.ResourceAlreadyExists(err) {
|
||||
return fmt.Errorf("could not create pod disruption budget: %v", err)
|
||||
return fmt.Errorf("could not create primary pod disruption budget: %v", err)
|
||||
}
|
||||
c.logger.Infof("pod disruption budget %q already exists", util.NameFromMeta(pdb.ObjectMeta))
|
||||
if pdb, err = c.KubeClient.PodDisruptionBudgets(c.Namespace).Get(context.TODO(), c.podDisruptionBudgetName(), metav1.GetOptions{}); err != nil {
|
||||
if pdb, err = c.KubeClient.PodDisruptionBudgets(c.Namespace).Get(context.TODO(), c.PrimaryPodDisruptionBudgetName(), metav1.GetOptions{}); err != nil {
|
||||
return fmt.Errorf("could not fetch existing %q pod disruption budget", util.NameFromMeta(pdb.ObjectMeta))
|
||||
}
|
||||
}
|
||||
|
||||
c.logger.Infof("created missing pod disruption budget %q", util.NameFromMeta(pdb.ObjectMeta))
|
||||
c.PodDisruptionBudget = pdb
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *Cluster) syncCriticalOpPodDisruptionBudget(isUpdate bool) error {
|
||||
var (
|
||||
pdb *policyv1.PodDisruptionBudget
|
||||
err error
|
||||
)
|
||||
if pdb, err = c.KubeClient.PodDisruptionBudgets(c.Namespace).Get(context.TODO(), c.criticalOpPodDisruptionBudgetName(), metav1.GetOptions{}); err == nil {
|
||||
c.CriticalOpPodDisruptionBudget = pdb
|
||||
newPDB := c.generateCriticalOpPodDisruptionBudget()
|
||||
match, reason := c.comparePodDisruptionBudget(pdb, newPDB)
|
||||
if !match {
|
||||
c.logPDBChanges(pdb, newPDB, isUpdate, reason)
|
||||
if err = c.updateCriticalOpPodDisruptionBudget(newPDB); err != nil {
|
||||
return err
|
||||
}
|
||||
} else {
|
||||
c.CriticalOpPodDisruptionBudget = pdb
|
||||
}
|
||||
return nil
|
||||
|
||||
}
|
||||
if !k8sutil.ResourceNotFound(err) {
|
||||
return fmt.Errorf("could not get pod disruption budget: %v", err)
|
||||
}
|
||||
// no existing pod disruption budget, create new one
|
||||
c.logger.Infof("could not find pod disruption budget for critical operations")
|
||||
|
||||
if err = c.createCriticalOpPodDisruptionBudget(); err != nil {
|
||||
if !k8sutil.ResourceAlreadyExists(err) {
|
||||
return fmt.Errorf("could not create pod disruption budget for critical operations: %v", err)
|
||||
}
|
||||
c.logger.Infof("pod disruption budget %q already exists", util.NameFromMeta(pdb.ObjectMeta))
|
||||
if pdb, err = c.KubeClient.PodDisruptionBudgets(c.Namespace).Get(context.TODO(), c.criticalOpPodDisruptionBudgetName(), metav1.GetOptions{}); err != nil {
|
||||
return fmt.Errorf("could not fetch existing %q pod disruption budget", util.NameFromMeta(pdb.ObjectMeta))
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *Cluster) syncPodDisruptionBudgets(isUpdate bool) error {
|
||||
errors := make([]string, 0)
|
||||
|
||||
if err := c.syncPrimaryPodDisruptionBudget(isUpdate); err != nil {
|
||||
errors = append(errors, fmt.Sprintf("%v", err))
|
||||
}
|
||||
|
||||
if err := c.syncCriticalOpPodDisruptionBudget(isUpdate); err != nil {
|
||||
errors = append(errors, fmt.Sprintf("%v", err))
|
||||
}
|
||||
|
||||
if len(errors) > 0 {
|
||||
return fmt.Errorf("%v", strings.Join(errors, `', '`))
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -58,15 +58,16 @@ type WorkerStatus struct {
|
|||
|
||||
// ClusterStatus describes status of the cluster
|
||||
type ClusterStatus struct {
|
||||
Team string
|
||||
Cluster string
|
||||
Namespace string
|
||||
MasterService *v1.Service
|
||||
ReplicaService *v1.Service
|
||||
MasterEndpoint *v1.Endpoints
|
||||
ReplicaEndpoint *v1.Endpoints
|
||||
StatefulSet *appsv1.StatefulSet
|
||||
PodDisruptionBudget *policyv1.PodDisruptionBudget
|
||||
Team string
|
||||
Cluster string
|
||||
Namespace string
|
||||
MasterService *v1.Service
|
||||
ReplicaService *v1.Service
|
||||
MasterEndpoint *v1.Endpoints
|
||||
ReplicaEndpoint *v1.Endpoints
|
||||
StatefulSet *appsv1.StatefulSet
|
||||
PrimaryPodDisruptionBudget *policyv1.PodDisruptionBudget
|
||||
CriticalOpPodDisruptionBudget *policyv1.PodDisruptionBudget
|
||||
|
||||
CurrentProcess Process
|
||||
Worker uint32
|
||||
|
|
|
|||
|
|
@ -329,7 +329,7 @@ func newInheritedAnnotationsCluster(client k8sutil.KubernetesClient) (*Cluster,
|
|||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
_, err = cluster.createPodDisruptionBudget()
|
||||
err = cluster.createPodDisruptionBudgets()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue