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cluster.go
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cluster.go
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package cluster
// Postgres CustomResourceDefinition object i.e. Spilo
import (
"context"
"database/sql"
"encoding/json"
"fmt"
"reflect"
"regexp"
"strings"
"sync"
"time"
"github.com/sirupsen/logrus"
acidv1 "github.com/zalando/postgres-operator/pkg/apis/acid.zalan.do/v1"
"github.com/zalando/postgres-operator/pkg/generated/clientset/versioned/scheme"
"github.com/zalando/postgres-operator/pkg/spec"
pgteams "github.com/zalando/postgres-operator/pkg/teams"
"github.com/zalando/postgres-operator/pkg/util"
"github.com/zalando/postgres-operator/pkg/util/config"
"github.com/zalando/postgres-operator/pkg/util/constants"
"github.com/zalando/postgres-operator/pkg/util/k8sutil"
"github.com/zalando/postgres-operator/pkg/util/patroni"
"github.com/zalando/postgres-operator/pkg/util/teams"
"github.com/zalando/postgres-operator/pkg/util/users"
"github.com/zalando/postgres-operator/pkg/util/volumes"
appsv1 "k8s.io/api/apps/v1"
v1 "k8s.io/api/core/v1"
policyv1 "k8s.io/api/policy/v1"
rbacv1 "k8s.io/api/rbac/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/tools/reference"
)
var (
alphaNumericRegexp = regexp.MustCompile("^[a-zA-Z][a-zA-Z0-9]*$")
databaseNameRegexp = regexp.MustCompile("^[a-zA-Z_][a-zA-Z0-9_]*$")
userRegexp = regexp.MustCompile(`^[a-z0-9]([-_a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-_a-z0-9]*[a-z0-9])?)*$`)
patroniObjectSuffixes = []string{"leader", "config", "sync", "failover"}
)
// Config contains operator-wide clients and configuration used from a cluster. TODO: remove struct duplication.
type Config struct {
OpConfig config.Config
RestConfig *rest.Config
PgTeamMap *pgteams.PostgresTeamMap
InfrastructureRoles map[string]spec.PgUser // inherited from the controller
PodServiceAccount *v1.ServiceAccount
PodServiceAccountRoleBinding *rbacv1.RoleBinding
}
type kubeResources struct {
Services map[PostgresRole]*v1.Service
Endpoints map[PostgresRole]*v1.Endpoints
Secrets map[types.UID]*v1.Secret
Statefulset *appsv1.StatefulSet
PodDisruptionBudget *policyv1.PodDisruptionBudget
//Pods are treated separately
//PVCs are treated separately
}
// Cluster describes postgresql cluster
type Cluster struct {
kubeResources
acidv1.Postgresql
Config
logger *logrus.Entry
eventRecorder record.EventRecorder
patroni patroni.Interface
pgUsers map[string]spec.PgUser
pgUsersCache map[string]spec.PgUser
systemUsers map[string]spec.PgUser
podSubscribers map[spec.NamespacedName]chan PodEvent
podSubscribersMu sync.RWMutex
pgDb *sql.DB
mu sync.Mutex
userSyncStrategy spec.UserSyncer
deleteOptions metav1.DeleteOptions
podEventsQueue *cache.FIFO
replicationSlots map[string]interface{}
teamsAPIClient teams.Interface
oauthTokenGetter OAuthTokenGetter
KubeClient k8sutil.KubernetesClient //TODO: move clients to the better place?
currentProcess Process
processMu sync.RWMutex // protects the current operation for reporting, no need to hold the master mutex
specMu sync.RWMutex // protects the spec for reporting, no need to hold the master mutex
ConnectionPooler map[PostgresRole]*ConnectionPoolerObjects
EBSVolumes map[string]volumes.VolumeProperties
VolumeResizer volumes.VolumeResizer
currentMajorVersion int
}
type compareStatefulsetResult struct {
match bool
replace bool
rollingUpdate bool
reasons []string
}
// New creates a new cluster. This function should be called from a controller.
func New(cfg Config, kubeClient k8sutil.KubernetesClient, pgSpec acidv1.Postgresql, logger *logrus.Entry, eventRecorder record.EventRecorder) *Cluster {
deletePropagationPolicy := metav1.DeletePropagationOrphan
podEventsQueue := cache.NewFIFO(func(obj interface{}) (string, error) {
e, ok := obj.(PodEvent)
if !ok {
return "", fmt.Errorf("could not cast to PodEvent")
}
return fmt.Sprintf("%s-%s", e.PodName, e.ResourceVersion), nil
})
passwordEncryption, ok := pgSpec.Spec.PostgresqlParam.Parameters["password_encryption"]
if !ok {
passwordEncryption = "md5"
}
cluster := &Cluster{
Config: cfg,
Postgresql: pgSpec,
pgUsers: make(map[string]spec.PgUser),
systemUsers: make(map[string]spec.PgUser),
podSubscribers: make(map[spec.NamespacedName]chan PodEvent),
kubeResources: kubeResources{
Secrets: make(map[types.UID]*v1.Secret),
Services: make(map[PostgresRole]*v1.Service),
Endpoints: make(map[PostgresRole]*v1.Endpoints)},
userSyncStrategy: users.DefaultUserSyncStrategy{
PasswordEncryption: passwordEncryption,
RoleDeletionSuffix: cfg.OpConfig.RoleDeletionSuffix,
AdditionalOwnerRoles: cfg.OpConfig.AdditionalOwnerRoles,
},
deleteOptions: metav1.DeleteOptions{PropagationPolicy: &deletePropagationPolicy},
podEventsQueue: podEventsQueue,
KubeClient: kubeClient,
currentMajorVersion: 0,
replicationSlots: make(map[string]interface{}),
}
cluster.logger = logger.WithField("pkg", "cluster").WithField("cluster-name", cluster.clusterName())
cluster.teamsAPIClient = teams.NewTeamsAPI(cfg.OpConfig.TeamsAPIUrl, logger)
cluster.oauthTokenGetter = newSecretOauthTokenGetter(&kubeClient, cfg.OpConfig.OAuthTokenSecretName)
cluster.patroni = patroni.New(cluster.logger, nil)
cluster.eventRecorder = eventRecorder
cluster.EBSVolumes = make(map[string]volumes.VolumeProperties)
if cfg.OpConfig.StorageResizeMode != "pvc" || cfg.OpConfig.EnableEBSGp3Migration {
cluster.VolumeResizer = &volumes.EBSVolumeResizer{AWSRegion: cfg.OpConfig.AWSRegion}
}
return cluster
}
func (c *Cluster) clusterName() spec.NamespacedName {
return util.NameFromMeta(c.ObjectMeta)
}
func (c *Cluster) clusterNamespace() string {
return c.ObjectMeta.Namespace
}
func (c *Cluster) teamName() string {
// TODO: check Teams API for the actual name (in case the user passes an integer Id).
return c.Spec.TeamID
}
func (c *Cluster) setProcessName(procName string, args ...interface{}) {
c.processMu.Lock()
defer c.processMu.Unlock()
c.currentProcess = Process{
Name: fmt.Sprintf(procName, args...),
StartTime: time.Now(),
}
}
// GetReference of Postgres CR object
// i.e. required to emit events to this resource
func (c *Cluster) GetReference() *v1.ObjectReference {
ref, err := reference.GetReference(scheme.Scheme, &c.Postgresql)
if err != nil {
c.logger.Errorf("could not get reference for Postgresql CR %v/%v: %v", c.Postgresql.Namespace, c.Postgresql.Name, err)
}
return ref
}
func (c *Cluster) isNewCluster() bool {
return c.Status.Creating()
}
// initUsers populates c.systemUsers and c.pgUsers maps.
func (c *Cluster) initUsers() error {
c.setProcessName("initializing users")
// if team member deprecation is enabled save current state of pgUsers
// to check for deleted roles
c.pgUsersCache = map[string]spec.PgUser{}
if c.OpConfig.EnableTeamMemberDeprecation {
for k, v := range c.pgUsers {
if v.Origin == spec.RoleOriginTeamsAPI {
c.pgUsersCache[k] = v
}
}
}
// clear our the previous state of the cluster users (in case we are
// running a sync).
c.systemUsers = map[string]spec.PgUser{}
c.pgUsers = map[string]spec.PgUser{}
c.initSystemUsers()
if err := c.initInfrastructureRoles(); err != nil {
return fmt.Errorf("could not init infrastructure roles: %v", err)
}
if err := c.initPreparedDatabaseRoles(); err != nil {
return fmt.Errorf("could not init default users: %v", err)
}
if err := c.initRobotUsers(); err != nil {
return fmt.Errorf("could not init robot users: %v", err)
}
if err := c.initHumanUsers(); err != nil {
// remember all cached users in c.pgUsers
for cachedUserName, cachedUser := range c.pgUsersCache {
c.pgUsers[cachedUserName] = cachedUser
}
return fmt.Errorf("could not init human users: %v", err)
}
c.initAdditionalOwnerRoles()
return nil
}
// Create creates the new kubernetes objects associated with the cluster.
func (c *Cluster) Create() (err error) {
c.mu.Lock()
defer c.mu.Unlock()
var (
service *v1.Service
ep *v1.Endpoints
ss *appsv1.StatefulSet
)
defer func() {
if err == nil {
c.KubeClient.SetPostgresCRDStatus(c.clusterName(), acidv1.ClusterStatusRunning) //TODO: are you sure it's running?
} else {
c.KubeClient.SetPostgresCRDStatus(c.clusterName(), acidv1.ClusterStatusAddFailed)
}
}()
c.KubeClient.SetPostgresCRDStatus(c.clusterName(), acidv1.ClusterStatusCreating)
c.eventRecorder.Event(c.GetReference(), v1.EventTypeNormal, "Create", "Started creation of new cluster resources")
for _, role := range []PostgresRole{Master, Replica} {
// if kubernetes_use_configmaps is set Patroni will create configmaps
// otherwise it will use endpoints
if !c.patroniKubernetesUseConfigMaps() {
if c.Endpoints[role] != nil {
return fmt.Errorf("%s endpoint already exists in the cluster", role)
}
if role == Master {
// replica endpoint will be created by the replica service. Master endpoint needs to be created by us,
// since the corresponding master service does not define any selectors.
ep, err = c.createEndpoint(role)
if err != nil {
return fmt.Errorf("could not create %s endpoint: %v", role, err)
}
c.logger.Infof("endpoint %q has been successfully created", util.NameFromMeta(ep.ObjectMeta))
c.eventRecorder.Eventf(c.GetReference(), v1.EventTypeNormal, "Endpoints", "Endpoint %q has been successfully created", util.NameFromMeta(ep.ObjectMeta))
}
}
if c.Services[role] != nil {
return fmt.Errorf("service already exists in the cluster")
}
service, err = c.createService(role)
if err != nil {
return fmt.Errorf("could not create %s service: %v", role, err)
}
c.logger.Infof("%s service %q has been successfully created", role, util.NameFromMeta(service.ObjectMeta))
c.eventRecorder.Eventf(c.GetReference(), v1.EventTypeNormal, "Services", "The service %q for role %s has been successfully created", util.NameFromMeta(service.ObjectMeta), role)
}
if err = c.initUsers(); err != nil {
return err
}
c.logger.Infof("users have been initialized")
if err = c.syncSecrets(); err != nil {
return fmt.Errorf("could not create secrets: %v", err)
}
c.logger.Infof("secrets have been successfully created")
c.eventRecorder.Event(c.GetReference(), v1.EventTypeNormal, "Secrets", "The secrets have been successfully created")
if c.PodDisruptionBudget != nil {
return fmt.Errorf("pod disruption budget already exists in the cluster")
}
pdb, err := c.createPodDisruptionBudget()
if err != nil {
return fmt.Errorf("could not create pod disruption budget: %v", err)
}
c.logger.Infof("pod disruption budget %q has been successfully created", util.NameFromMeta(pdb.ObjectMeta))
if c.Statefulset != nil {
return fmt.Errorf("statefulset already exists in the cluster")
}
ss, err = c.createStatefulSet()
if err != nil {
return fmt.Errorf("could not create statefulset: %v", err)
}
c.logger.Infof("statefulset %q has been successfully created", util.NameFromMeta(ss.ObjectMeta))
c.eventRecorder.Eventf(c.GetReference(), v1.EventTypeNormal, "StatefulSet", "Statefulset %q has been successfully created", util.NameFromMeta(ss.ObjectMeta))
c.logger.Info("waiting for the cluster being ready")
if err = c.waitStatefulsetPodsReady(); err != nil {
c.logger.Errorf("failed to create cluster: %v", err)
return err
}
c.logger.Infof("pods are ready")
c.eventRecorder.Event(c.GetReference(), v1.EventTypeNormal, "StatefulSet", "Pods are ready")
// create database objects unless we are running without pods or disabled
// that feature explicitly
if !(c.databaseAccessDisabled() || c.getNumberOfInstances(&c.Spec) <= 0 || c.Spec.StandbyCluster != nil) {
c.logger.Infof("Create roles")
if err = c.createRoles(); err != nil {
return fmt.Errorf("could not create users: %v", err)
}
c.logger.Infof("users have been successfully created")
if err = c.syncDatabases(); err != nil {
return fmt.Errorf("could not sync databases: %v", err)
}
if err = c.syncPreparedDatabases(); err != nil {
return fmt.Errorf("could not sync prepared databases: %v", err)
}
c.logger.Infof("databases have been successfully created")
}
if c.Postgresql.Spec.EnableLogicalBackup {
if err := c.createLogicalBackupJob(); err != nil {
return fmt.Errorf("could not create a k8s cron job for logical backups: %v", err)
}
c.logger.Info("a k8s cron job for logical backup has been successfully created")
}
if err := c.listResources(); err != nil {
c.logger.Errorf("could not list resources: %v", err)
}
// Create connection pooler deployment and services if necessary. Since we
// need to perform some operations with the database itself (e.g. install
// lookup function), do it as the last step, when everything is available.
//
// Do not consider connection pooler as a strict requirement, and if
// something fails, report warning
c.createConnectionPooler(c.installLookupFunction)
// remember slots to detect deletion from manifest
for slotName, desiredSlot := range c.Spec.Patroni.Slots {
c.replicationSlots[slotName] = desiredSlot
}
if len(c.Spec.Streams) > 0 {
// creating streams requires syncing the statefulset first
err = c.syncStatefulSet()
if err != nil {
return fmt.Errorf("could not sync statefulset: %v", err)
}
if err = c.syncStreams(); err != nil {
c.logger.Errorf("could not create streams: %v", err)
}
}
return nil
}
func (c *Cluster) compareStatefulSetWith(statefulSet *appsv1.StatefulSet) *compareStatefulsetResult {
reasons := make([]string, 0)
var match, needsRollUpdate, needsReplace bool
match = true
//TODO: improve me
if *c.Statefulset.Spec.Replicas != *statefulSet.Spec.Replicas {
match = false
reasons = append(reasons, "new statefulset's number of replicas does not match the current one")
}
if changed, reason := c.compareAnnotations(c.Statefulset.Annotations, statefulSet.Annotations); changed {
match = false
needsReplace = true
reasons = append(reasons, "new statefulset's annotations do not match: "+reason)
}
if c.Statefulset.Spec.PodManagementPolicy != statefulSet.Spec.PodManagementPolicy {
match = false
needsReplace = true
reasons = append(reasons, "new statefulset's pod management policy do not match")
}
if !reflect.DeepEqual(c.Statefulset.Spec.PersistentVolumeClaimRetentionPolicy, statefulSet.Spec.PersistentVolumeClaimRetentionPolicy) {
match = false
needsReplace = true
reasons = append(reasons, "new statefulset's persistent volume claim retention policy do not match")
}
needsRollUpdate, reasons = c.compareContainers("initContainers", c.Statefulset.Spec.Template.Spec.InitContainers, statefulSet.Spec.Template.Spec.InitContainers, needsRollUpdate, reasons)
needsRollUpdate, reasons = c.compareContainers("containers", c.Statefulset.Spec.Template.Spec.Containers, statefulSet.Spec.Template.Spec.Containers, needsRollUpdate, reasons)
if len(c.Statefulset.Spec.Template.Spec.Containers) == 0 {
c.logger.Warningf("statefulset %q has no container", util.NameFromMeta(c.Statefulset.ObjectMeta))
return &compareStatefulsetResult{}
}
// In the comparisons below, the needsReplace and needsRollUpdate flags are never reset, since checks fall through
// and the combined effect of all the changes should be applied.
// TODO: make sure this is in sync with generatePodTemplate, ideally by using the same list of fields to generate
// the template and the diff
if c.Statefulset.Spec.Template.Spec.ServiceAccountName != statefulSet.Spec.Template.Spec.ServiceAccountName {
needsReplace = true
needsRollUpdate = true
reasons = append(reasons, "new statefulset's serviceAccountName service account name does not match the current one")
}
if *c.Statefulset.Spec.Template.Spec.TerminationGracePeriodSeconds != *statefulSet.Spec.Template.Spec.TerminationGracePeriodSeconds {
needsReplace = true
needsRollUpdate = true
reasons = append(reasons, "new statefulset's terminationGracePeriodSeconds does not match the current one")
}
if !reflect.DeepEqual(c.Statefulset.Spec.Template.Spec.Affinity, statefulSet.Spec.Template.Spec.Affinity) {
needsReplace = true
needsRollUpdate = true
reasons = append(reasons, "new statefulset's pod affinity does not match the current one")
}
if len(c.Statefulset.Spec.Template.Spec.Tolerations) != len(statefulSet.Spec.Template.Spec.Tolerations) {
needsReplace = true
needsRollUpdate = true
reasons = append(reasons, "new statefulset's pod tolerations does not match the current one")
}
// Some generated fields like creationTimestamp make it not possible to use DeepCompare on Spec.Template.ObjectMeta
if !reflect.DeepEqual(c.Statefulset.Spec.Template.Labels, statefulSet.Spec.Template.Labels) {
needsReplace = true
needsRollUpdate = true
reasons = append(reasons, "new statefulset's metadata labels does not match the current one")
}
if (c.Statefulset.Spec.Selector != nil) && (statefulSet.Spec.Selector != nil) {
if !reflect.DeepEqual(c.Statefulset.Spec.Selector.MatchLabels, statefulSet.Spec.Selector.MatchLabels) {
// forbid introducing new labels in the selector on the new statefulset, as it would cripple replacements
// due to the fact that the new statefulset won't be able to pick up old pods with non-matching labels.
if !util.MapContains(c.Statefulset.Spec.Selector.MatchLabels, statefulSet.Spec.Selector.MatchLabels) {
c.logger.Warningf("new statefulset introduces extra labels in the label selector, cannot continue")
return &compareStatefulsetResult{}
}
needsReplace = true
reasons = append(reasons, "new statefulset's selector does not match the current one")
}
}
if changed, reason := c.compareAnnotations(c.Statefulset.Spec.Template.Annotations, statefulSet.Spec.Template.Annotations); changed {
match = false
needsReplace = true
needsRollUpdate = true
reasons = append(reasons, "new statefulset's pod template metadata annotations does not match "+reason)
}
if !reflect.DeepEqual(c.Statefulset.Spec.Template.Spec.SecurityContext, statefulSet.Spec.Template.Spec.SecurityContext) {
needsReplace = true
needsRollUpdate = true
reasons = append(reasons, "new statefulset's pod template security context in spec does not match the current one")
}
if len(c.Statefulset.Spec.VolumeClaimTemplates) != len(statefulSet.Spec.VolumeClaimTemplates) {
needsReplace = true
reasons = append(reasons, "new statefulset's volumeClaimTemplates contains different number of volumes to the old one")
}
for i := 0; i < len(c.Statefulset.Spec.VolumeClaimTemplates); i++ {
name := c.Statefulset.Spec.VolumeClaimTemplates[i].Name
// Some generated fields like creationTimestamp make it not possible to use DeepCompare on ObjectMeta
if name != statefulSet.Spec.VolumeClaimTemplates[i].Name {
needsReplace = true
reasons = append(reasons, fmt.Sprintf("new statefulset's name for volume %d does not match the current one", i))
continue
}
if !reflect.DeepEqual(c.Statefulset.Spec.VolumeClaimTemplates[i].Annotations, statefulSet.Spec.VolumeClaimTemplates[i].Annotations) {
needsReplace = true
reasons = append(reasons, fmt.Sprintf("new statefulset's annotations for volume %q does not match the current one", name))
}
if !reflect.DeepEqual(c.Statefulset.Spec.VolumeClaimTemplates[i].Spec, statefulSet.Spec.VolumeClaimTemplates[i].Spec) {
name := c.Statefulset.Spec.VolumeClaimTemplates[i].Name
needsReplace = true
reasons = append(reasons, fmt.Sprintf("new statefulset's volumeClaimTemplates specification for volume %q does not match the current one", name))
}
}
if len(c.Statefulset.Spec.Template.Spec.Volumes) != len(statefulSet.Spec.Template.Spec.Volumes) {
needsReplace = true
reasons = append(reasons, "new statefulset's volumes contains different number of volumes to the old one")
}
// we assume any change in priority happens by rolling out a new priority class
// changing the priority value in an existing class is not supproted
if c.Statefulset.Spec.Template.Spec.PriorityClassName != statefulSet.Spec.Template.Spec.PriorityClassName {
needsReplace = true
needsRollUpdate = true
reasons = append(reasons, "new statefulset's pod priority class in spec does not match the current one")
}
// lazy Spilo update: modify the image in the statefulset itself but let its pods run with the old image
// until they are re-created for other reasons, for example node rotation
effectivePodImage := getPostgresContainer(&c.Statefulset.Spec.Template.Spec).Image
desiredImage := getPostgresContainer(&statefulSet.Spec.Template.Spec).Image
if c.OpConfig.EnableLazySpiloUpgrade && !reflect.DeepEqual(effectivePodImage, desiredImage) {
needsReplace = true
reasons = append(reasons, "lazy Spilo update: new statefulset's pod image does not match the current one")
}
if needsRollUpdate || needsReplace {
match = false
}
return &compareStatefulsetResult{match: match, reasons: reasons, rollingUpdate: needsRollUpdate, replace: needsReplace}
}
type containerCondition func(a, b v1.Container) bool
type containerCheck struct {
condition containerCondition
reason string
}
func newCheck(msg string, cond containerCondition) containerCheck {
return containerCheck{reason: msg, condition: cond}
}
// compareContainers: compare two list of Containers
// and return:
// * whether or not a rolling update is needed
// * a list of reasons in a human readable format
func (c *Cluster) compareContainers(description string, setA, setB []v1.Container, needsRollUpdate bool, reasons []string) (bool, []string) {
if len(setA) != len(setB) {
return true, append(reasons, fmt.Sprintf("new statefulset %s's length does not match the current ones", description))
}
checks := []containerCheck{
newCheck("new statefulset %s's %s (index %d) name does not match the current one",
func(a, b v1.Container) bool { return a.Name != b.Name }),
newCheck("new statefulset %s's %s (index %d) readiness probe does not match the current one",
func(a, b v1.Container) bool { return !reflect.DeepEqual(a.ReadinessProbe, b.ReadinessProbe) }),
newCheck("new statefulset %s's %s (index %d) ports do not match the current one",
func(a, b v1.Container) bool { return !comparePorts(a.Ports, b.Ports) }),
newCheck("new statefulset %s's %s (index %d) resources do not match the current ones",
func(a, b v1.Container) bool { return !compareResources(&a.Resources, &b.Resources) }),
newCheck("new statefulset %s's %s (index %d) environment does not match the current one",
func(a, b v1.Container) bool { return !compareEnv(a.Env, b.Env) }),
newCheck("new statefulset %s's %s (index %d) environment sources do not match the current one",
func(a, b v1.Container) bool { return !reflect.DeepEqual(a.EnvFrom, b.EnvFrom) }),
newCheck("new statefulset %s's %s (index %d) security context does not match the current one",
func(a, b v1.Container) bool { return !reflect.DeepEqual(a.SecurityContext, b.SecurityContext) }),
newCheck("new statefulset %s's %s (index %d) volume mounts do not match the current one",
func(a, b v1.Container) bool { return !reflect.DeepEqual(a.VolumeMounts, b.VolumeMounts) }),
}
if !c.OpConfig.EnableLazySpiloUpgrade {
checks = append(checks, newCheck("new statefulset %s's %s (index %d) image does not match the current one",
func(a, b v1.Container) bool { return a.Image != b.Image }))
}
for index, containerA := range setA {
containerB := setB[index]
for _, check := range checks {
if check.condition(containerA, containerB) {
needsRollUpdate = true
reasons = append(reasons, fmt.Sprintf(check.reason, description, containerA.Name, index))
}
}
}
return needsRollUpdate, reasons
}
func compareResources(a *v1.ResourceRequirements, b *v1.ResourceRequirements) bool {
equal := true
if a != nil {
equal = compareResourcesAssumeFirstNotNil(a, b)
}
if equal && (b != nil) {
equal = compareResourcesAssumeFirstNotNil(b, a)
}
return equal
}
func compareResourcesAssumeFirstNotNil(a *v1.ResourceRequirements, b *v1.ResourceRequirements) bool {
if b == nil || (len(b.Requests) == 0) {
return len(a.Requests) == 0
}
for k, v := range a.Requests {
if (&v).Cmp(b.Requests[k]) != 0 {
return false
}
}
for k, v := range a.Limits {
if (&v).Cmp(b.Limits[k]) != 0 {
return false
}
}
return true
}
func compareEnv(a, b []v1.EnvVar) bool {
if len(a) != len(b) {
return false
}
equal := true
for _, enva := range a {
hasmatch := false
for _, envb := range b {
if enva.Name == envb.Name {
hasmatch = true
if enva.Name == "SPILO_CONFIGURATION" {
equal = compareSpiloConfiguration(enva.Value, envb.Value)
} else {
if enva.Value == "" && envb.Value == "" {
equal = reflect.DeepEqual(enva.ValueFrom, envb.ValueFrom)
} else {
equal = (enva.Value == envb.Value)
}
}
if !equal {
return false
}
}
}
if !hasmatch {
return false
}
}
return true
}
func compareSpiloConfiguration(configa, configb string) bool {
var (
oa, ob spiloConfiguration
)
var err error
err = json.Unmarshal([]byte(configa), &oa)
if err != nil {
return false
}
oa.Bootstrap.DCS = patroniDCS{}
err = json.Unmarshal([]byte(configb), &ob)
if err != nil {
return false
}
ob.Bootstrap.DCS = patroniDCS{}
return reflect.DeepEqual(oa, ob)
}
func areProtocolsEqual(a, b v1.Protocol) bool {
return a == b ||
(a == "" && b == v1.ProtocolTCP) ||
(a == v1.ProtocolTCP && b == "")
}
func comparePorts(a, b []v1.ContainerPort) bool {
if len(a) != len(b) {
return false
}
areContainerPortsEqual := func(a, b v1.ContainerPort) bool {
return a.Name == b.Name &&
a.HostPort == b.HostPort &&
areProtocolsEqual(a.Protocol, b.Protocol) &&
a.HostIP == b.HostIP
}
findByPortValue := func(portSpecs []v1.ContainerPort, port int32) (v1.ContainerPort, bool) {
for _, portSpec := range portSpecs {
if portSpec.ContainerPort == port {
return portSpec, true
}
}
return v1.ContainerPort{}, false
}
for _, portA := range a {
portB, found := findByPortValue(b, portA.ContainerPort)
if !found {
return false
}
if !areContainerPortsEqual(portA, portB) {
return false
}
}
return true
}
func (c *Cluster) compareAnnotations(old, new map[string]string) (bool, string) {
reason := ""
ignoredAnnotations := make(map[string]bool)
for _, ignore := range c.OpConfig.IgnoredAnnotations {
ignoredAnnotations[ignore] = true
}
for key := range old {
if _, ok := ignoredAnnotations[key]; ok {
continue
}
if _, ok := new[key]; !ok {
reason += fmt.Sprintf(" Removed %q.", key)
}
}
for key := range new {
if _, ok := ignoredAnnotations[key]; ok {
continue
}
v, ok := old[key]
if !ok {
reason += fmt.Sprintf(" Added %q with value %q.", key, new[key])
} else if v != new[key] {
reason += fmt.Sprintf(" %q changed from %q to %q.", key, v, new[key])
}
}
return reason != "", reason
}
func (c *Cluster) compareServices(old, new *v1.Service) (bool, string) {
if old.Spec.Type != new.Spec.Type {
return false, fmt.Sprintf("new service's type %q does not match the current one %q",
new.Spec.Type, old.Spec.Type)
}
oldSourceRanges := old.Spec.LoadBalancerSourceRanges
newSourceRanges := new.Spec.LoadBalancerSourceRanges
/* work around Kubernetes 1.6 serializing [] as nil. See https://github.com/kubernetes/kubernetes/issues/43203 */
if (len(oldSourceRanges) != 0) || (len(newSourceRanges) != 0) {
if !util.IsEqualIgnoreOrder(oldSourceRanges, newSourceRanges) {
return false, "new service's LoadBalancerSourceRange does not match the current one"
}
}
if changed, reason := c.compareAnnotations(old.Annotations, new.Annotations); changed {
return !changed, "new service's annotations does not match the current one:" + reason
}
return true, ""
}
// Update changes Kubernetes objects according to the new specification. Unlike the sync case, the missing object
// (i.e. service) is treated as an error
// logical backup cron jobs are an exception: a user-initiated Update can enable a logical backup job
// for a cluster that had no such job before. In this case a missing job is not an error.
func (c *Cluster) Update(oldSpec, newSpec *acidv1.Postgresql) error {
updateFailed := false
userInitFailed := false
syncStatefulSet := false
c.mu.Lock()
defer c.mu.Unlock()
c.KubeClient.SetPostgresCRDStatus(c.clusterName(), acidv1.ClusterStatusUpdating)
c.setSpec(newSpec)
defer func() {
if updateFailed {
c.KubeClient.SetPostgresCRDStatus(c.clusterName(), acidv1.ClusterStatusUpdateFailed)
} else {
c.KubeClient.SetPostgresCRDStatus(c.clusterName(), acidv1.ClusterStatusRunning)
}
}()
logNiceDiff(c.logger, oldSpec, newSpec)
if IsBiggerPostgresVersion(oldSpec.Spec.PostgresqlParam.PgVersion, c.GetDesiredMajorVersion()) {
c.logger.Infof("postgresql version increased (%s -> %s), depending on config manual upgrade needed",
oldSpec.Spec.PostgresqlParam.PgVersion, newSpec.Spec.PostgresqlParam.PgVersion)
syncStatefulSet = true
} else {
c.logger.Infof("postgresql major version unchanged or smaller, no changes needed")
// sticking with old version, this will also advance GetDesiredVersion next time.
newSpec.Spec.PostgresqlParam.PgVersion = oldSpec.Spec.PostgresqlParam.PgVersion
}
// Service
if !reflect.DeepEqual(c.generateService(Master, &oldSpec.Spec), c.generateService(Master, &newSpec.Spec)) ||
!reflect.DeepEqual(c.generateService(Replica, &oldSpec.Spec), c.generateService(Replica, &newSpec.Spec)) {
if err := c.syncServices(); err != nil {
c.logger.Errorf("could not sync services: %v", err)
updateFailed = true
}
}
// Users
func() {
// check if users need to be synced during update
sameUsers := reflect.DeepEqual(oldSpec.Spec.Users, newSpec.Spec.Users) &&
reflect.DeepEqual(oldSpec.Spec.PreparedDatabases, newSpec.Spec.PreparedDatabases)
sameRotatedUsers := reflect.DeepEqual(oldSpec.Spec.UsersWithSecretRotation, newSpec.Spec.UsersWithSecretRotation) &&
reflect.DeepEqual(oldSpec.Spec.UsersWithInPlaceSecretRotation, newSpec.Spec.UsersWithInPlaceSecretRotation)
// connection pooler needs one system user created who is initialized in initUsers
// only when disabled in oldSpec and enabled in newSpec
needPoolerUser := c.needConnectionPoolerUser(&oldSpec.Spec, &newSpec.Spec)
// streams new replication user created who is initialized in initUsers
// only when streams were not specified in oldSpec but in newSpec
needStreamUser := len(oldSpec.Spec.Streams) == 0 && len(newSpec.Spec.Streams) > 0
if !sameUsers || !sameRotatedUsers || needPoolerUser || needStreamUser {
c.logger.Debugf("initialize users")
if err := c.initUsers(); err != nil {
c.logger.Errorf("could not init users - skipping sync of secrets and databases: %v", err)
userInitFailed = true
updateFailed = true
return
}
c.logger.Debugf("syncing secrets")
//TODO: mind the secrets of the deleted/new users
if err := c.syncSecrets(); err != nil {
c.logger.Errorf("could not sync secrets: %v", err)
updateFailed = true
}
}
}()
// Volume
if c.OpConfig.StorageResizeMode != "off" {
c.syncVolumes()
} else {
c.logger.Infof("Storage resize is disabled (storage_resize_mode is off). Skipping volume sync.")
}
// streams configuration
if len(oldSpec.Spec.Streams) == 0 && len(newSpec.Spec.Streams) > 0 {
syncStatefulSet = true
}
// Statefulset
func() {
oldSs, err := c.generateStatefulSet(&oldSpec.Spec)
if err != nil {
c.logger.Errorf("could not generate old statefulset spec: %v", err)
updateFailed = true
return
}
newSs, err := c.generateStatefulSet(&newSpec.Spec)
if err != nil {
c.logger.Errorf("could not generate new statefulset spec: %v", err)
updateFailed = true
return
}
if syncStatefulSet || !reflect.DeepEqual(oldSs, newSs) {
c.logger.Debugf("syncing statefulsets")
syncStatefulSet = false
// TODO: avoid generating the StatefulSet object twice by passing it to syncStatefulSet
if err := c.syncStatefulSet(); err != nil {
c.logger.Errorf("could not sync statefulsets: %v", err)
updateFailed = true
}
}
}()
// pod disruption budget
if oldSpec.Spec.NumberOfInstances != newSpec.Spec.NumberOfInstances {
c.logger.Debug("syncing pod disruption budgets")
if err := c.syncPodDisruptionBudget(true); err != nil {
c.logger.Errorf("could not sync pod disruption budget: %v", err)
updateFailed = true
}
}
// logical backup job
func() {
// create if it did not exist
if !oldSpec.Spec.EnableLogicalBackup && newSpec.Spec.EnableLogicalBackup {
c.logger.Debugf("creating backup cron job")
if err := c.createLogicalBackupJob(); err != nil {
c.logger.Errorf("could not create a k8s cron job for logical backups: %v", err)
updateFailed = true
return
}
}
// delete if no longer needed
if oldSpec.Spec.EnableLogicalBackup && !newSpec.Spec.EnableLogicalBackup {
c.logger.Debugf("deleting backup cron job")
if err := c.deleteLogicalBackupJob(); err != nil {
c.logger.Errorf("could not delete a k8s cron job for logical backups: %v", err)
updateFailed = true
return
}
}
// apply schedule changes
// this is the only parameter of logical backups a user can overwrite in the cluster manifest
if (oldSpec.Spec.EnableLogicalBackup && newSpec.Spec.EnableLogicalBackup) &&
(newSpec.Spec.LogicalBackupSchedule != oldSpec.Spec.LogicalBackupSchedule) {
c.logger.Debugf("updating schedule of the backup cron job")
if err := c.syncLogicalBackupJob(); err != nil {
c.logger.Errorf("could not sync logical backup jobs: %v", err)
updateFailed = true
}
}
}()
// Roles and Databases
if !userInitFailed && !(c.databaseAccessDisabled() || c.getNumberOfInstances(&c.Spec) <= 0 || c.Spec.StandbyCluster != nil) {
c.logger.Debugf("syncing roles")
if err := c.syncRoles(); err != nil {
c.logger.Errorf("could not sync roles: %v", err)
updateFailed = true
}
if !reflect.DeepEqual(oldSpec.Spec.Databases, newSpec.Spec.Databases) ||
!reflect.DeepEqual(oldSpec.Spec.PreparedDatabases, newSpec.Spec.PreparedDatabases) {
c.logger.Infof("syncing databases")
if err := c.syncDatabases(); err != nil {
c.logger.Errorf("could not sync databases: %v", err)
updateFailed = true
}
}
if !reflect.DeepEqual(oldSpec.Spec.PreparedDatabases, newSpec.Spec.PreparedDatabases) {
c.logger.Infof("syncing prepared databases")
if err := c.syncPreparedDatabases(); err != nil {
c.logger.Errorf("could not sync prepared databases: %v", err)
updateFailed = true
}
}
}
// Sync connection pooler. Before actually doing sync reset lookup
// installation flag, since manifest updates could add another db which we
// need to process. In the future we may want to do this more careful and
// check which databases we need to process, but even repeating the whole
// installation process should be good enough.
if _, err := c.syncConnectionPooler(oldSpec, newSpec, c.installLookupFunction); err != nil {
c.logger.Errorf("could not sync connection pooler: %v", err)
updateFailed = true
}
// streams
if len(newSpec.Spec.Streams) > 0 {
if err := c.syncStreams(); err != nil {
c.logger.Errorf("could not sync streams: %v", err)
updateFailed = true
}
}
if !updateFailed {
// Major version upgrade must only fire after success of earlier operations and should stay last
if err := c.majorVersionUpgrade(); err != nil {
c.logger.Errorf("major version upgrade failed: %v", err)
updateFailed = true
}
}
return nil
}
func syncResources(a, b *v1.ResourceRequirements) bool {
for _, res := range []v1.ResourceName{
v1.ResourceCPU,
v1.ResourceMemory,
} {
if !a.Limits[res].Equal(b.Limits[res]) ||
!a.Requests[res].Equal(b.Requests[res]) {
return true
}
}
return false
}
// Delete deletes the cluster and cleans up all objects associated with it (including statefulsets).
// The deletion order here is somewhat significant, because Patroni, when running with the Kubernetes
// DCS, reuses the master's endpoint to store the leader related metadata. If we remove the endpoint
// before the pods, it will be re-created by the current master pod and will remain, obstructing the
// creation of the new cluster with the same name. Therefore, the endpoints should be deleted last.
func (c *Cluster) Delete() {