/
sync.go
833 lines (708 loc) · 27.2 KB
/
sync.go
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package cluster
import (
"context"
"fmt"
"regexp"
batchv1beta1 "k8s.io/api/batch/v1beta1"
v1 "k8s.io/api/core/v1"
policybeta1 "k8s.io/api/policy/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
acidv1 "github.com/zalando/postgres-operator/pkg/apis/acid.zalan.do/v1"
"github.com/zalando/postgres-operator/pkg/spec"
"github.com/zalando/postgres-operator/pkg/util"
"github.com/zalando/postgres-operator/pkg/util/constants"
"github.com/zalando/postgres-operator/pkg/util/k8sutil"
"github.com/zalando/postgres-operator/pkg/util/volumes"
)
// Sync syncs the cluster, making sure the actual Kubernetes objects correspond to what is defined in the manifest.
// Unlike the update, sync does not error out if some objects do not exist and takes care of creating them.
func (c *Cluster) Sync(newSpec *acidv1.Postgresql) error {
var err error
c.mu.Lock()
defer c.mu.Unlock()
oldSpec := c.Postgresql
c.setSpec(newSpec)
defer func() {
if err != nil {
c.logger.Warningf("error while syncing cluster state: %v", err)
c.setStatus(acidv1.ClusterStatusSyncFailed)
} else if !c.Status.Running() {
c.setStatus(acidv1.ClusterStatusRunning)
}
}()
if err = c.initUsers(); err != nil {
err = fmt.Errorf("could not init users: %v", err)
return err
}
c.logger.Debugf("syncing secrets")
//TODO: mind the secrets of the deleted/new users
if err = c.syncSecrets(); err != nil {
err = fmt.Errorf("could not sync secrets: %v", err)
return err
}
c.logger.Debugf("syncing services")
if err = c.syncServices(); err != nil {
err = fmt.Errorf("could not sync services: %v", err)
return err
}
// potentially enlarge volumes before changing the statefulset. By doing that
// in this order we make sure the operator is not stuck waiting for a pod that
// cannot start because it ran out of disk space.
// TODO: handle the case of the cluster that is downsized and enlarged again
// (there will be a volume from the old pod for which we can't act before the
// the statefulset modification is concluded)
c.logger.Debugf("syncing persistent volumes")
if err = c.syncVolumes(); err != nil {
err = fmt.Errorf("could not sync persistent volumes: %v", err)
return err
}
if err = c.enforceMinResourceLimits(&c.Spec); err != nil {
err = fmt.Errorf("could not enforce minimum resource limits: %v", err)
return err
}
c.logger.Debugf("syncing statefulsets")
if err = c.syncStatefulSet(); err != nil {
if !k8sutil.ResourceAlreadyExists(err) {
err = fmt.Errorf("could not sync statefulsets: %v", err)
return err
}
}
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)
return err
}
// create a logical backup job unless we are running without pods or disable that feature explicitly
if c.Spec.EnableLogicalBackup && c.getNumberOfInstances(&c.Spec) > 0 {
c.logger.Debug("syncing logical backup job")
if err = c.syncLogicalBackupJob(); err != nil {
err = fmt.Errorf("could not sync the logical backup job: %v", err)
return err
}
}
// create database objects unless we are running without pods or disabled that feature explicitly
if !(c.databaseAccessDisabled() || c.getNumberOfInstances(&newSpec.Spec) <= 0 || c.Spec.StandbyCluster != nil) {
c.logger.Debugf("syncing roles")
if err = c.syncRoles(); err != nil {
err = fmt.Errorf("could not sync roles: %v", err)
return err
}
c.logger.Debugf("syncing databases")
if err = c.syncDatabases(); err != nil {
err = fmt.Errorf("could not sync databases: %v", err)
return err
}
}
// sync connection pooler
if _, err = c.syncConnectionPooler(&oldSpec, newSpec, c.installLookupFunction); err != nil {
return fmt.Errorf("could not sync connection pooler: %v", err)
}
return err
}
func (c *Cluster) syncServices() error {
for _, role := range []PostgresRole{Master, Replica} {
c.logger.Debugf("syncing %s service", role)
if !c.patroniKubernetesUseConfigMaps() {
if err := c.syncEndpoint(role); err != nil {
return fmt.Errorf("could not sync %s endpoint: %v", role, err)
}
}
if err := c.syncService(role); err != nil {
return fmt.Errorf("could not sync %s service: %v", role, err)
}
}
return nil
}
func (c *Cluster) syncService(role PostgresRole) error {
var (
svc *v1.Service
err error
)
c.setProcessName("syncing %s service", role)
if svc, err = c.KubeClient.Services(c.Namespace).Get(context.TODO(), c.serviceName(role), metav1.GetOptions{}); err == nil {
c.Services[role] = svc
desiredSvc := c.generateService(role, &c.Spec)
if match, reason := k8sutil.SameService(svc, desiredSvc); !match {
c.logServiceChanges(role, svc, desiredSvc, false, reason)
if err = c.updateService(role, desiredSvc); err != nil {
return fmt.Errorf("could not update %s service to match desired state: %v", role, err)
}
c.logger.Infof("%s service %q is in the desired state now", role, util.NameFromMeta(desiredSvc.ObjectMeta))
}
return nil
}
if !k8sutil.ResourceNotFound(err) {
return fmt.Errorf("could not get %s service: %v", role, err)
}
// no existing service, create new one
c.Services[role] = nil
c.logger.Infof("could not find the cluster's %s service", role)
if svc, err = c.createService(role); err == nil {
c.logger.Infof("created missing %s service %q", role, util.NameFromMeta(svc.ObjectMeta))
} else {
if !k8sutil.ResourceAlreadyExists(err) {
return fmt.Errorf("could not create missing %s service: %v", role, err)
}
c.logger.Infof("%s service %q already exists", role, util.NameFromMeta(svc.ObjectMeta))
if svc, err = c.KubeClient.Services(c.Namespace).Get(context.TODO(), c.serviceName(role), metav1.GetOptions{}); err != nil {
return fmt.Errorf("could not fetch existing %s service: %v", role, err)
}
}
c.Services[role] = svc
return nil
}
func (c *Cluster) syncEndpoint(role PostgresRole) error {
var (
ep *v1.Endpoints
err error
)
c.setProcessName("syncing %s endpoint", role)
if ep, err = c.KubeClient.Endpoints(c.Namespace).Get(context.TODO(), c.endpointName(role), metav1.GetOptions{}); err == nil {
// TODO: No syncing of endpoints here, is this covered completely by updateService?
c.Endpoints[role] = ep
return nil
}
if !k8sutil.ResourceNotFound(err) {
return fmt.Errorf("could not get %s endpoint: %v", role, err)
}
// no existing endpoint, create new one
c.Endpoints[role] = nil
c.logger.Infof("could not find the cluster's %s endpoint", role)
if ep, err = c.createEndpoint(role); err == nil {
c.logger.Infof("created missing %s endpoint %q", role, util.NameFromMeta(ep.ObjectMeta))
} else {
if !k8sutil.ResourceAlreadyExists(err) {
return fmt.Errorf("could not create missing %s endpoint: %v", role, err)
}
c.logger.Infof("%s endpoint %q already exists", role, util.NameFromMeta(ep.ObjectMeta))
if ep, err = c.KubeClient.Endpoints(c.Namespace).Get(context.TODO(), c.endpointName(role), metav1.GetOptions{}); err != nil {
return fmt.Errorf("could not fetch existing %s endpoint: %v", role, err)
}
}
c.Endpoints[role] = ep
return nil
}
func (c *Cluster) syncPodDisruptionBudget(isUpdate bool) error {
var (
pdb *policybeta1.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 match, reason := k8sutil.SamePDB(pdb, newPDB); !match {
c.logPDBChanges(pdb, newPDB, isUpdate, reason)
if err = c.updatePodDisruptionBudget(newPDB); err != nil {
return err
}
} else {
c.PodDisruptionBudget = 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.PodDisruptionBudget = nil
c.logger.Infof("could not find the cluster's pod disruption budget")
if pdb, err = c.createPodDisruptionBudget(); err != nil {
if !k8sutil.ResourceAlreadyExists(err) {
return fmt.Errorf("could not create 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 {
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) syncStatefulSet() error {
var (
podsRollingUpdateRequired bool
)
// NB: Be careful to consider the codepath that acts on podsRollingUpdateRequired before returning early.
sset, err := c.KubeClient.StatefulSets(c.Namespace).Get(context.TODO(), c.statefulSetName(), metav1.GetOptions{})
if err != nil {
if !k8sutil.ResourceNotFound(err) {
return fmt.Errorf("could not get statefulset: %v", err)
}
// statefulset does not exist, try to re-create it
c.Statefulset = nil
c.logger.Infof("could not find the cluster's statefulset")
pods, err := c.listPods()
if err != nil {
return fmt.Errorf("could not list pods of the statefulset: %v", err)
}
sset, err = c.createStatefulSet()
if err != nil {
return fmt.Errorf("could not create missing statefulset: %v", err)
}
if err = c.waitStatefulsetPodsReady(); err != nil {
return fmt.Errorf("cluster is not ready: %v", err)
}
podsRollingUpdateRequired = (len(pods) > 0)
if podsRollingUpdateRequired {
c.logger.Warningf("found pods from the previous statefulset: trigger rolling update")
if err := c.applyRollingUpdateFlagforStatefulSet(podsRollingUpdateRequired); err != nil {
return fmt.Errorf("could not set rolling update flag for the statefulset: %v", err)
}
}
c.logger.Infof("created missing statefulset %q", util.NameFromMeta(sset.ObjectMeta))
} else {
podsRollingUpdateRequired = c.mergeRollingUpdateFlagUsingCache(sset)
// statefulset is already there, make sure we use its definition in order to compare with the spec.
c.Statefulset = sset
// check if there is no Postgres version mismatch
for _, container := range c.Statefulset.Spec.Template.Spec.Containers {
if container.Name != "postgres" {
continue
}
pgVersion, err := c.getNewPgVersion(container, c.Spec.PostgresqlParam.PgVersion)
if err != nil {
return fmt.Errorf("could not parse current Postgres version: %v", err)
}
c.Spec.PostgresqlParam.PgVersion = pgVersion
}
desiredSS, err := c.generateStatefulSet(&c.Spec)
if err != nil {
return fmt.Errorf("could not generate statefulset: %v", err)
}
c.setRollingUpdateFlagForStatefulSet(desiredSS, podsRollingUpdateRequired)
cmp := c.compareStatefulSetWith(desiredSS)
if !cmp.match {
if cmp.rollingUpdate && !podsRollingUpdateRequired {
podsRollingUpdateRequired = true
c.setRollingUpdateFlagForStatefulSet(desiredSS, podsRollingUpdateRequired)
}
c.logStatefulSetChanges(c.Statefulset, desiredSS, false, cmp.reasons)
if !cmp.replace {
if err := c.updateStatefulSet(desiredSS); err != nil {
return fmt.Errorf("could not update statefulset: %v", err)
}
} else {
if err := c.replaceStatefulSet(desiredSS); err != nil {
return fmt.Errorf("could not replace statefulset: %v", err)
}
}
}
annotations := c.PropagateAnnotationsToStatefulsets(c.Statefulset.Annotations)
c.updateStatefulSetAnnotations(annotations)
}
// Apply special PostgreSQL parameters that can only be set via the Patroni API.
// it is important to do it after the statefulset pods are there, but before the rolling update
// since those parameters require PostgreSQL restart.
if err := c.checkAndSetGlobalPostgreSQLConfiguration(); err != nil {
return fmt.Errorf("could not set cluster-wide PostgreSQL configuration options: %v", err)
}
// if we get here we also need to re-create the pods (either leftovers from the old
// statefulset or those that got their configuration from the outdated statefulset)
if podsRollingUpdateRequired {
c.logger.Debugln("performing rolling update")
if err := c.recreatePods(); err != nil {
return fmt.Errorf("could not recreate pods: %v", err)
}
c.logger.Infof("pods have been recreated")
if err := c.applyRollingUpdateFlagforStatefulSet(false); err != nil {
c.logger.Warningf("could not clear rolling update for the statefulset: %v", err)
}
}
return nil
}
// PropagateAnnotationsToStatefulsets updates annotations to statefulsets if required
// based on the annotations in postgres CRD
func (c *Cluster) PropagateAnnotationsToStatefulsets(annotations map[string]string) map[string]string {
ToPropagateAnnotations := c.OpConfig.StatefulsetPropagateAnnotations
PgCRDAnnotations := c.Postgresql.ObjectMeta.GetAnnotations()
if ToPropagateAnnotations != nil && PgCRDAnnotations != nil {
for _, anno := range ToPropagateAnnotations {
for k, v := range PgCRDAnnotations {
matched, err := regexp.MatchString(anno, k)
if err == nil && matched {
annotations[k] = v
}
}
}
}
return annotations
}
// checkAndSetGlobalPostgreSQLConfiguration checks whether cluster-wide API parameters
// (like max_connections) has changed and if necessary sets it via the Patroni API
func (c *Cluster) checkAndSetGlobalPostgreSQLConfiguration() error {
var (
err error
pods []v1.Pod
)
// we need to extract those options from the cluster manifest.
optionsToSet := make(map[string]string)
pgOptions := c.Spec.Parameters
for k, v := range pgOptions {
if isBootstrapOnlyParameter(k) {
optionsToSet[k] = v
}
}
if len(optionsToSet) == 0 {
return nil
}
if pods, err = c.listPods(); err != nil {
return err
}
if len(pods) == 0 {
return fmt.Errorf("could not call Patroni API: cluster has no pods")
}
// try all pods until the first one that is successful, as it doesn't matter which pod
// carries the request to change configuration through
for _, pod := range pods {
podName := util.NameFromMeta(pod.ObjectMeta)
c.logger.Debugf("calling Patroni API on a pod %s to set the following Postgres options: %v",
podName, optionsToSet)
if err = c.patroni.SetPostgresParameters(&pod, optionsToSet); err == nil {
return nil
}
c.logger.Warningf("could not patch postgres parameters with a pod %s: %v", podName, err)
}
return fmt.Errorf("could not reach Patroni API to set Postgres options: failed on every pod (%d total)",
len(pods))
}
func (c *Cluster) syncSecrets() error {
var (
err error
secret *v1.Secret
)
c.setProcessName("syncing secrets")
secrets := c.generateUserSecrets()
for secretUsername, secretSpec := range secrets {
if secret, err = c.KubeClient.Secrets(secretSpec.Namespace).Create(context.TODO(), secretSpec, metav1.CreateOptions{}); err == nil {
c.Secrets[secret.UID] = secret
c.logger.Debugf("created new secret %q, uid: %q", util.NameFromMeta(secret.ObjectMeta), secret.UID)
continue
}
if k8sutil.ResourceAlreadyExists(err) {
var userMap map[string]spec.PgUser
if secret, err = c.KubeClient.Secrets(secretSpec.Namespace).Get(context.TODO(), secretSpec.Name, metav1.GetOptions{}); err != nil {
return fmt.Errorf("could not get current secret: %v", err)
}
if secretUsername != string(secret.Data["username"]) {
c.logger.Warningf("secret %q does not contain the role %q", secretSpec.Name, secretUsername)
continue
}
c.logger.Debugf("secret %q already exists, fetching its password", util.NameFromMeta(secret.ObjectMeta))
if secretUsername == c.systemUsers[constants.SuperuserKeyName].Name {
secretUsername = constants.SuperuserKeyName
userMap = c.systemUsers
} else if secretUsername == c.systemUsers[constants.ReplicationUserKeyName].Name {
secretUsername = constants.ReplicationUserKeyName
userMap = c.systemUsers
} else {
userMap = c.pgUsers
}
pwdUser := userMap[secretUsername]
// if this secret belongs to the infrastructure role and the password has changed - replace it in the secret
if pwdUser.Password != string(secret.Data["password"]) &&
pwdUser.Origin == spec.RoleOriginInfrastructure {
c.logger.Debugf("updating the secret %q from the infrastructure roles", secretSpec.Name)
if _, err = c.KubeClient.Secrets(secretSpec.Namespace).Update(context.TODO(), secretSpec, metav1.UpdateOptions{}); err != nil {
return fmt.Errorf("could not update infrastructure role secret for role %q: %v", secretUsername, err)
}
} else {
// for non-infrastructure role - update the role with the password from the secret
pwdUser.Password = string(secret.Data["password"])
userMap[secretUsername] = pwdUser
}
} else {
return fmt.Errorf("could not create secret for user %q: %v", secretUsername, err)
}
}
return nil
}
func (c *Cluster) syncRoles() (err error) {
c.setProcessName("syncing roles")
var (
dbUsers spec.PgUserMap
userNames []string
)
err = c.initDbConn()
if err != nil {
return fmt.Errorf("could not init db connection: %v", err)
}
defer func() {
if err2 := c.closeDbConn(); err2 != nil {
if err == nil {
err = fmt.Errorf("could not close database connection: %v", err2)
} else {
err = fmt.Errorf("could not close database connection: %v (prior error: %v)", err2, err)
}
}
}()
for _, u := range c.pgUsers {
userNames = append(userNames, u.Name)
}
if c.needConnectionPooler() {
connectionPoolerUser := c.systemUsers[constants.ConnectionPoolerUserKeyName]
userNames = append(userNames, connectionPoolerUser.Name)
if _, exists := c.pgUsers[connectionPoolerUser.Name]; !exists {
c.pgUsers[connectionPoolerUser.Name] = connectionPoolerUser
}
}
dbUsers, err = c.readPgUsersFromDatabase(userNames)
if err != nil {
return fmt.Errorf("error getting users from the database: %v", err)
}
pgSyncRequests := c.userSyncStrategy.ProduceSyncRequests(dbUsers, c.pgUsers)
if err = c.userSyncStrategy.ExecuteSyncRequests(pgSyncRequests, c.pgDb); err != nil {
return fmt.Errorf("error executing sync statements: %v", err)
}
return nil
}
// syncVolumes reads all persistent volumes and checks that their size matches the one declared in the statefulset.
func (c *Cluster) syncVolumes() error {
c.setProcessName("syncing volumes")
act, err := c.volumesNeedResizing(c.Spec.Volume)
if err != nil {
return fmt.Errorf("could not compare size of the volumes: %v", err)
}
if !act {
return nil
}
if err := c.resizeVolumes(c.Spec.Volume, []volumes.VolumeResizer{&volumes.EBSVolumeResizer{AWSRegion: c.OpConfig.AWSRegion}}); err != nil {
return fmt.Errorf("could not sync volumes: %v", err)
}
c.logger.Infof("volumes have been synced successfully")
return nil
}
func (c *Cluster) syncDatabases() error {
c.setProcessName("syncing databases")
createDatabases := make(map[string]string)
alterOwnerDatabases := make(map[string]string)
if err := c.initDbConn(); err != nil {
return fmt.Errorf("could not init database connection")
}
defer func() {
if err := c.closeDbConn(); err != nil {
c.logger.Errorf("could not close database connection: %v", err)
}
}()
currentDatabases, err := c.getDatabases()
if err != nil {
return fmt.Errorf("could not get current databases: %v", err)
}
for datname, newOwner := range c.Spec.Databases {
currentOwner, exists := currentDatabases[datname]
if !exists {
createDatabases[datname] = newOwner
} else if currentOwner != newOwner {
alterOwnerDatabases[datname] = newOwner
}
}
if len(createDatabases)+len(alterOwnerDatabases) == 0 {
return nil
}
for datname, owner := range createDatabases {
if err = c.executeCreateDatabase(datname, owner); err != nil {
return err
}
}
for datname, owner := range alterOwnerDatabases {
if err = c.executeAlterDatabaseOwner(datname, owner); err != nil {
return err
}
}
return nil
}
func (c *Cluster) syncLogicalBackupJob() error {
var (
job *batchv1beta1.CronJob
desiredJob *batchv1beta1.CronJob
err error
)
c.setProcessName("syncing the logical backup job")
// sync the job if it exists
jobName := c.getLogicalBackupJobName()
if job, err = c.KubeClient.CronJobsGetter.CronJobs(c.Namespace).Get(context.TODO(), jobName, metav1.GetOptions{}); err == nil {
desiredJob, err = c.generateLogicalBackupJob()
if err != nil {
return fmt.Errorf("could not generate the desired logical backup job state: %v", err)
}
if match, reason := k8sutil.SameLogicalBackupJob(job, desiredJob); !match {
c.logger.Infof("logical job %q is not in the desired state and needs to be updated",
c.getLogicalBackupJobName(),
)
if reason != "" {
c.logger.Infof("reason: %s", reason)
}
if err = c.patchLogicalBackupJob(desiredJob); err != nil {
return fmt.Errorf("could not update logical backup job to match desired state: %v", err)
}
c.logger.Info("the logical backup job is synced")
}
return nil
}
if !k8sutil.ResourceNotFound(err) {
return fmt.Errorf("could not get logical backp job: %v", err)
}
// no existing logical backup job, create new one
c.logger.Info("could not find the cluster's logical backup job")
if err = c.createLogicalBackupJob(); err == nil {
c.logger.Infof("created missing logical backup job %q", jobName)
} else {
if !k8sutil.ResourceAlreadyExists(err) {
return fmt.Errorf("could not create missing logical backup job: %v", err)
}
c.logger.Infof("logical backup job %q already exists", jobName)
if _, err = c.KubeClient.CronJobsGetter.CronJobs(c.Namespace).Get(context.TODO(), jobName, metav1.GetOptions{}); err != nil {
return fmt.Errorf("could not fetch existing logical backup job: %v", err)
}
}
return nil
}
func (c *Cluster) syncConnectionPooler(oldSpec,
newSpec *acidv1.Postgresql,
lookup InstallFunction) (SyncReason, error) {
var reason SyncReason
var err error
if c.ConnectionPooler == nil {
c.ConnectionPooler = &ConnectionPoolerObjects{}
}
newNeedConnectionPooler := c.needConnectionPoolerWorker(&newSpec.Spec)
oldNeedConnectionPooler := c.needConnectionPoolerWorker(&oldSpec.Spec)
if newNeedConnectionPooler {
// Try to sync in any case. If we didn't needed connection pooler before,
// it means we want to create it. If it was already present, still sync
// since it could happen that there is no difference in specs, and all
// the resources are remembered, but the deployment was manually deleted
// in between
c.logger.Debug("syncing connection pooler")
// in this case also do not forget to install lookup function as for
// creating cluster
if !oldNeedConnectionPooler || !c.ConnectionPooler.LookupFunction {
newConnectionPooler := newSpec.Spec.ConnectionPooler
specSchema := ""
specUser := ""
if newConnectionPooler != nil {
specSchema = newConnectionPooler.Schema
specUser = newConnectionPooler.User
}
schema := util.Coalesce(
specSchema,
c.OpConfig.ConnectionPooler.Schema)
user := util.Coalesce(
specUser,
c.OpConfig.ConnectionPooler.User)
if err = lookup(schema, user); err != nil {
return NoSync, err
}
}
if reason, err = c.syncConnectionPoolerWorker(oldSpec, newSpec); err != nil {
c.logger.Errorf("could not sync connection pooler: %v", err)
return reason, err
}
}
if oldNeedConnectionPooler && !newNeedConnectionPooler {
// delete and cleanup resources
if err = c.deleteConnectionPooler(); err != nil {
c.logger.Warningf("could not remove connection pooler: %v", err)
}
}
if !oldNeedConnectionPooler && !newNeedConnectionPooler {
// delete and cleanup resources if not empty
if c.ConnectionPooler != nil &&
(c.ConnectionPooler.Deployment != nil ||
c.ConnectionPooler.Service != nil) {
if err = c.deleteConnectionPooler(); err != nil {
c.logger.Warningf("could not remove connection pooler: %v", err)
}
}
}
return reason, nil
}
// Synchronize connection pooler resources. Effectively we're interested only in
// synchronizing the corresponding deployment, but in case of deployment or
// service is missing, create it. After checking, also remember an object for
// the future references.
func (c *Cluster) syncConnectionPoolerWorker(oldSpec, newSpec *acidv1.Postgresql) (
SyncReason, error) {
deployment, err := c.KubeClient.
Deployments(c.Namespace).
Get(context.TODO(), c.connectionPoolerName(), metav1.GetOptions{})
if err != nil && k8sutil.ResourceNotFound(err) {
msg := "Deployment %s for connection pooler synchronization is not found, create it"
c.logger.Warningf(msg, c.connectionPoolerName())
deploymentSpec, err := c.generateConnectionPoolerDeployment(&newSpec.Spec)
if err != nil {
msg = "could not generate deployment for connection pooler: %v"
return NoSync, fmt.Errorf(msg, err)
}
deployment, err := c.KubeClient.
Deployments(deploymentSpec.Namespace).
Create(context.TODO(), deploymentSpec, metav1.CreateOptions{})
if err != nil {
return NoSync, err
}
c.ConnectionPooler.Deployment = deployment
} else if err != nil {
msg := "could not get connection pooler deployment to sync: %v"
return NoSync, fmt.Errorf(msg, err)
} else {
c.ConnectionPooler.Deployment = deployment
// actual synchronization
oldConnectionPooler := oldSpec.Spec.ConnectionPooler
newConnectionPooler := newSpec.Spec.ConnectionPooler
// sync implementation below assumes that both old and new specs are
// not nil, but it can happen. To avoid any confusion like updating a
// deployment because the specification changed from nil to an empty
// struct (that was initialized somewhere before) replace any nil with
// an empty spec.
if oldConnectionPooler == nil {
oldConnectionPooler = &acidv1.ConnectionPooler{}
}
if newConnectionPooler == nil {
newConnectionPooler = &acidv1.ConnectionPooler{}
}
c.logger.Infof("Old: %+v, New %+v", oldConnectionPooler, newConnectionPooler)
specSync, specReason := c.needSyncConnectionPoolerSpecs(oldConnectionPooler, newConnectionPooler)
defaultsSync, defaultsReason := c.needSyncConnectionPoolerDefaults(newConnectionPooler, deployment)
reason := append(specReason, defaultsReason...)
if specSync || defaultsSync {
c.logger.Infof("Update connection pooler deployment %s, reason: %+v",
c.connectionPoolerName(), reason)
newDeploymentSpec, err := c.generateConnectionPoolerDeployment(&newSpec.Spec)
if err != nil {
msg := "could not generate deployment for connection pooler: %v"
return reason, fmt.Errorf(msg, err)
}
oldDeploymentSpec := c.ConnectionPooler.Deployment
deployment, err := c.updateConnectionPoolerDeployment(
oldDeploymentSpec,
newDeploymentSpec)
if err != nil {
return reason, err
}
c.ConnectionPooler.Deployment = deployment
return reason, nil
}
}
service, err := c.KubeClient.
Services(c.Namespace).
Get(context.TODO(), c.connectionPoolerName(), metav1.GetOptions{})
if err != nil && k8sutil.ResourceNotFound(err) {
msg := "Service %s for connection pooler synchronization is not found, create it"
c.logger.Warningf(msg, c.connectionPoolerName())
serviceSpec := c.generateConnectionPoolerService(&newSpec.Spec)
service, err := c.KubeClient.
Services(serviceSpec.Namespace).
Create(context.TODO(), serviceSpec, metav1.CreateOptions{})
if err != nil {
return NoSync, err
}
c.ConnectionPooler.Service = service
} else if err != nil {
msg := "could not get connection pooler service to sync: %v"
return NoSync, fmt.Errorf(msg, err)
} else {
// Service updates are not supported and probably not that useful anyway
c.ConnectionPooler.Service = service
}
return NoSync, nil
}