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k8sres.go
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package cluster
import (
"context"
"encoding/json"
"fmt"
"path"
"sort"
"strings"
"github.com/sirupsen/logrus"
appsv1 "k8s.io/api/apps/v1"
v1 "k8s.io/api/core/v1"
policybeta1 "k8s.io/api/policy/v1beta1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/intstr"
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/config"
"github.com/zalando/postgres-operator/pkg/util/constants"
"github.com/zalando/postgres-operator/pkg/util/k8sutil"
batchv1 "k8s.io/api/batch/v1"
batchv1beta1 "k8s.io/api/batch/v1beta1"
"k8s.io/apimachinery/pkg/labels"
)
const (
pgBinariesLocationTemplate = "/usr/lib/postgresql/%v/bin"
patroniPGBinariesParameterName = "bin_dir"
patroniPGParametersParameterName = "parameters"
patroniPGHBAConfParameterName = "pg_hba"
localHost = "127.0.0.1/32"
connectionPoolerContainer = "connection-pooler"
pgPort = 5432
)
type pgUser struct {
Password string `json:"password"`
Options []string `json:"options"`
}
type patroniDCS struct {
TTL uint32 `json:"ttl,omitempty"`
LoopWait uint32 `json:"loop_wait,omitempty"`
RetryTimeout uint32 `json:"retry_timeout,omitempty"`
MaximumLagOnFailover float32 `json:"maximum_lag_on_failover,omitempty"`
SynchronousMode bool `json:"synchronous_mode,omitempty"`
SynchronousModeStrict bool `json:"synchronous_mode_strict,omitempty"`
PGBootstrapConfiguration map[string]interface{} `json:"postgresql,omitempty"`
Slots map[string]map[string]string `json:"slots,omitempty"`
}
type pgBootstrap struct {
Initdb []interface{} `json:"initdb"`
Users map[string]pgUser `json:"users"`
DCS patroniDCS `json:"dcs,omitempty"`
}
type spiloConfiguration struct {
PgLocalConfiguration map[string]interface{} `json:"postgresql"`
Bootstrap pgBootstrap `json:"bootstrap"`
}
func (c *Cluster) statefulSetName() string {
return c.Name
}
func (c *Cluster) endpointName(role PostgresRole) string {
name := c.Name
if role == Replica {
name = name + "-repl"
}
return name
}
func (c *Cluster) serviceName(role PostgresRole) string {
name := c.Name
if role == Replica {
name = name + "-repl"
}
return name
}
func (c *Cluster) serviceAddress(role PostgresRole) string {
service, exist := c.Services[role]
if exist {
return service.ObjectMeta.Name
}
c.logger.Warningf("No service for role %s", role)
return ""
}
func (c *Cluster) servicePort(role PostgresRole) string {
service, exist := c.Services[role]
if exist {
return fmt.Sprint(service.Spec.Ports[0].Port)
}
c.logger.Warningf("No service for role %s", role)
return ""
}
func (c *Cluster) podDisruptionBudgetName() string {
return c.OpConfig.PDBNameFormat.Format("cluster", c.Name)
}
func (c *Cluster) makeDefaultResources() acidv1.Resources {
config := c.OpConfig
defaultRequests := acidv1.ResourceDescription{
CPU: config.Resources.DefaultCPURequest,
Memory: config.Resources.DefaultMemoryRequest,
}
defaultLimits := acidv1.ResourceDescription{
CPU: config.Resources.DefaultCPULimit,
Memory: config.Resources.DefaultMemoryLimit,
}
return acidv1.Resources{
ResourceRequests: defaultRequests,
ResourceLimits: defaultLimits,
}
}
func generateResourceRequirements(resources acidv1.Resources, defaultResources acidv1.Resources) (*v1.ResourceRequirements, error) {
var err error
specRequests := resources.ResourceRequests
specLimits := resources.ResourceLimits
result := v1.ResourceRequirements{}
result.Requests, err = fillResourceList(specRequests, defaultResources.ResourceRequests)
if err != nil {
return nil, fmt.Errorf("could not fill resource requests: %v", err)
}
result.Limits, err = fillResourceList(specLimits, defaultResources.ResourceLimits)
if err != nil {
return nil, fmt.Errorf("could not fill resource limits: %v", err)
}
return &result, nil
}
func fillResourceList(spec acidv1.ResourceDescription, defaults acidv1.ResourceDescription) (v1.ResourceList, error) {
var err error
requests := v1.ResourceList{}
if spec.CPU != "" {
requests[v1.ResourceCPU], err = resource.ParseQuantity(spec.CPU)
if err != nil {
return nil, fmt.Errorf("could not parse CPU quantity: %v", err)
}
} else {
requests[v1.ResourceCPU], err = resource.ParseQuantity(defaults.CPU)
if err != nil {
return nil, fmt.Errorf("could not parse default CPU quantity: %v", err)
}
}
if spec.Memory != "" {
requests[v1.ResourceMemory], err = resource.ParseQuantity(spec.Memory)
if err != nil {
return nil, fmt.Errorf("could not parse memory quantity: %v", err)
}
} else {
requests[v1.ResourceMemory], err = resource.ParseQuantity(defaults.Memory)
if err != nil {
return nil, fmt.Errorf("could not parse default memory quantity: %v", err)
}
}
return requests, nil
}
func generateSpiloJSONConfiguration(pg *acidv1.PostgresqlParam, patroni *acidv1.Patroni, pamRoleName string, EnablePgVersionEnvVar bool, logger *logrus.Entry) (string, error) {
config := spiloConfiguration{}
config.Bootstrap = pgBootstrap{}
config.Bootstrap.Initdb = []interface{}{map[string]string{"auth-host": "md5"},
map[string]string{"auth-local": "trust"}}
initdbOptionNames := []string{}
for k := range patroni.InitDB {
initdbOptionNames = append(initdbOptionNames, k)
}
/* We need to sort the user-defined options to more easily compare the resulting specs */
sort.Strings(initdbOptionNames)
// Initdb parameters in the manifest take priority over the default ones
// The whole type switch dance is caused by the ability to specify both
// maps and normal string items in the array of initdb options. We need
// both to convert the initial key-value to strings when necessary, and
// to de-duplicate the options supplied.
PatroniInitDBParams:
for _, k := range initdbOptionNames {
v := patroni.InitDB[k]
for i, defaultParam := range config.Bootstrap.Initdb {
switch t := defaultParam.(type) {
case map[string]string:
{
for k1 := range t {
if k1 == k {
(config.Bootstrap.Initdb[i]).(map[string]string)[k] = v
continue PatroniInitDBParams
}
}
}
case string:
{
/* if the option already occurs in the list */
if t == v {
continue PatroniInitDBParams
}
}
default:
logger.Warningf("unsupported type for initdb configuration item %s: %T", defaultParam, defaultParam)
continue PatroniInitDBParams
}
}
// The following options are known to have no parameters
if v == "true" {
switch k {
case "data-checksums", "debug", "no-locale", "noclean", "nosync", "sync-only":
config.Bootstrap.Initdb = append(config.Bootstrap.Initdb, k)
continue
}
}
config.Bootstrap.Initdb = append(config.Bootstrap.Initdb, map[string]string{k: v})
}
if patroni.MaximumLagOnFailover >= 0 {
config.Bootstrap.DCS.MaximumLagOnFailover = patroni.MaximumLagOnFailover
}
if patroni.LoopWait != 0 {
config.Bootstrap.DCS.LoopWait = patroni.LoopWait
}
if patroni.RetryTimeout != 0 {
config.Bootstrap.DCS.RetryTimeout = patroni.RetryTimeout
}
if patroni.TTL != 0 {
config.Bootstrap.DCS.TTL = patroni.TTL
}
if patroni.Slots != nil {
config.Bootstrap.DCS.Slots = patroni.Slots
}
if patroni.SynchronousMode {
config.Bootstrap.DCS.SynchronousMode = patroni.SynchronousMode
}
if patroni.SynchronousModeStrict {
config.Bootstrap.DCS.SynchronousModeStrict = patroni.SynchronousModeStrict
}
config.PgLocalConfiguration = make(map[string]interface{})
// the newer and preferred way to specify the PG version is to use the `PGVERSION` env variable
// setting postgresq.bin_dir in the SPILO_CONFIGURATION still works and takes precedence over PGVERSION
// so we add postgresq.bin_dir only if PGVERSION is unused
// see PR 222 in Spilo
if !EnablePgVersionEnvVar {
config.PgLocalConfiguration[patroniPGBinariesParameterName] = fmt.Sprintf(pgBinariesLocationTemplate, pg.PgVersion)
}
if len(pg.Parameters) > 0 {
local, bootstrap := getLocalAndBoostrapPostgreSQLParameters(pg.Parameters)
if len(local) > 0 {
config.PgLocalConfiguration[patroniPGParametersParameterName] = local
}
if len(bootstrap) > 0 {
config.Bootstrap.DCS.PGBootstrapConfiguration = make(map[string]interface{})
config.Bootstrap.DCS.PGBootstrapConfiguration[patroniPGParametersParameterName] = bootstrap
}
}
// Patroni gives us a choice of writing pg_hba.conf to either the bootstrap section or to the local postgresql one.
// We choose the local one, because we need Patroni to change pg_hba.conf in PostgreSQL after the user changes the
// relevant section in the manifest.
if len(patroni.PgHba) > 0 {
config.PgLocalConfiguration[patroniPGHBAConfParameterName] = patroni.PgHba
}
config.Bootstrap.Users = map[string]pgUser{
pamRoleName: {
Password: "",
Options: []string{constants.RoleFlagCreateDB, constants.RoleFlagNoLogin},
},
}
res, err := json.Marshal(config)
return string(res), err
}
func getLocalAndBoostrapPostgreSQLParameters(parameters map[string]string) (local, bootstrap map[string]string) {
local = make(map[string]string)
bootstrap = make(map[string]string)
for param, val := range parameters {
if isBootstrapOnlyParameter(param) {
bootstrap[param] = val
} else {
local[param] = val
}
}
return
}
func generateCapabilities(capabilities []string) *v1.Capabilities {
additionalCapabilities := make([]v1.Capability, 0, len(capabilities))
for _, capability := range capabilities {
additionalCapabilities = append(additionalCapabilities, v1.Capability(strings.ToUpper(capability)))
}
if len(additionalCapabilities) > 0 {
return &v1.Capabilities{
Add: additionalCapabilities,
}
}
return nil
}
func nodeAffinity(nodeReadinessLabel map[string]string, nodeAffinity *v1.NodeAffinity) *v1.Affinity {
if len(nodeReadinessLabel) == 0 && nodeAffinity == nil {
return nil
}
nodeAffinityCopy := v1.NodeAffinity{}
if nodeAffinity != nil {
nodeAffinityCopy = *nodeAffinity.DeepCopy()
}
if len(nodeReadinessLabel) > 0 {
matchExpressions := make([]v1.NodeSelectorRequirement, 0)
for k, v := range nodeReadinessLabel {
matchExpressions = append(matchExpressions, v1.NodeSelectorRequirement{
Key: k,
Operator: v1.NodeSelectorOpIn,
Values: []string{v},
})
}
nodeReadinessSelectorTerm := v1.NodeSelectorTerm{MatchExpressions: matchExpressions}
if nodeAffinityCopy.RequiredDuringSchedulingIgnoredDuringExecution == nil {
nodeAffinityCopy.RequiredDuringSchedulingIgnoredDuringExecution = &v1.NodeSelector{
NodeSelectorTerms: []v1.NodeSelectorTerm{
nodeReadinessSelectorTerm,
},
}
} else {
nodeAffinityCopy.RequiredDuringSchedulingIgnoredDuringExecution = &v1.NodeSelector{
NodeSelectorTerms: append(nodeAffinityCopy.RequiredDuringSchedulingIgnoredDuringExecution.NodeSelectorTerms, nodeReadinessSelectorTerm),
}
}
}
return &v1.Affinity{
NodeAffinity: &nodeAffinityCopy,
}
}
func generatePodAffinity(labels labels.Set, topologyKey string, nodeAffinity *v1.Affinity) *v1.Affinity {
// generate pod anti-affinity to avoid multiple pods of the same Postgres cluster in the same topology , e.g. node
podAffinity := v1.Affinity{
PodAntiAffinity: &v1.PodAntiAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: []v1.PodAffinityTerm{{
LabelSelector: &metav1.LabelSelector{
MatchLabels: labels,
},
TopologyKey: topologyKey,
}},
},
}
if nodeAffinity != nil && nodeAffinity.NodeAffinity != nil {
podAffinity.NodeAffinity = nodeAffinity.NodeAffinity
}
return &podAffinity
}
func tolerations(tolerationsSpec *[]v1.Toleration, podToleration map[string]string) []v1.Toleration {
// allow to override tolerations by postgresql manifest
if len(*tolerationsSpec) > 0 {
return *tolerationsSpec
}
if len(podToleration["key"]) > 0 ||
len(podToleration["operator"]) > 0 ||
len(podToleration["value"]) > 0 ||
len(podToleration["effect"]) > 0 {
return []v1.Toleration{
{
Key: podToleration["key"],
Operator: v1.TolerationOperator(podToleration["operator"]),
Value: podToleration["value"],
Effect: v1.TaintEffect(podToleration["effect"]),
},
}
}
return []v1.Toleration{}
}
// isBootstrapOnlyParameter checks against special Patroni bootstrap parameters.
// Those parameters must go to the bootstrap/dcs/postgresql/parameters section.
// See http://patroni.readthedocs.io/en/latest/dynamic_configuration.html.
func isBootstrapOnlyParameter(param string) bool {
return param == "max_connections" ||
param == "max_locks_per_transaction" ||
param == "max_worker_processes" ||
param == "max_prepared_transactions" ||
param == "wal_level" ||
param == "wal_log_hints" ||
param == "track_commit_timestamp"
}
func generateVolumeMounts(volume acidv1.Volume) []v1.VolumeMount {
return []v1.VolumeMount{
{
Name: constants.DataVolumeName,
MountPath: constants.PostgresDataMount, //TODO: fetch from manifest
SubPath: volume.SubPath,
},
}
}
func generateContainer(
name string,
dockerImage *string,
resourceRequirements *v1.ResourceRequirements,
envVars []v1.EnvVar,
volumeMounts []v1.VolumeMount,
privilegedMode bool,
privilegeEscalationMode *bool,
additionalPodCapabilities *v1.Capabilities,
) *v1.Container {
return &v1.Container{
Name: name,
Image: *dockerImage,
ImagePullPolicy: v1.PullIfNotPresent,
Resources: *resourceRequirements,
Ports: []v1.ContainerPort{
{
ContainerPort: 8008,
Protocol: v1.ProtocolTCP,
},
{
ContainerPort: 5432,
Protocol: v1.ProtocolTCP,
},
{
ContainerPort: 8080,
Protocol: v1.ProtocolTCP,
},
},
VolumeMounts: volumeMounts,
Env: envVars,
SecurityContext: &v1.SecurityContext{
AllowPrivilegeEscalation: privilegeEscalationMode,
Privileged: &privilegedMode,
ReadOnlyRootFilesystem: util.False(),
Capabilities: additionalPodCapabilities,
},
}
}
func generateSidecarContainers(sidecars []acidv1.Sidecar,
defaultResources acidv1.Resources, startIndex int, logger *logrus.Entry) ([]v1.Container, error) {
if len(sidecars) > 0 {
result := make([]v1.Container, 0)
for index, sidecar := range sidecars {
resources, err := generateResourceRequirements(
makeResources(
sidecar.Resources.ResourceRequests.CPU,
sidecar.Resources.ResourceRequests.Memory,
sidecar.Resources.ResourceLimits.CPU,
sidecar.Resources.ResourceLimits.Memory,
),
defaultResources,
)
if err != nil {
return nil, err
}
sc := getSidecarContainer(sidecar, startIndex+index, resources)
result = append(result, *sc)
}
return result, nil
}
return nil, nil
}
// adds common fields to sidecars
func patchSidecarContainers(in []v1.Container, volumeMounts []v1.VolumeMount, superUserName string, credentialsSecretName string, logger *logrus.Entry) []v1.Container {
result := []v1.Container{}
for _, container := range in {
container.VolumeMounts = append(container.VolumeMounts, volumeMounts...)
env := []v1.EnvVar{
{
Name: "POD_NAME",
ValueFrom: &v1.EnvVarSource{
FieldRef: &v1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "metadata.name",
},
},
},
{
Name: "POD_NAMESPACE",
ValueFrom: &v1.EnvVarSource{
FieldRef: &v1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "metadata.namespace",
},
},
},
{
Name: "POSTGRES_USER",
Value: superUserName,
},
{
Name: "POSTGRES_PASSWORD",
ValueFrom: &v1.EnvVarSource{
SecretKeyRef: &v1.SecretKeySelector{
LocalObjectReference: v1.LocalObjectReference{
Name: credentialsSecretName,
},
Key: "password",
},
},
},
}
mergedEnv := append(env, container.Env...)
container.Env = deduplicateEnvVars(mergedEnv, container.Name, logger)
result = append(result, container)
}
return result
}
// Check whether or not we're requested to mount an shm volume,
// taking into account that PostgreSQL manifest has precedence.
func mountShmVolumeNeeded(opConfig config.Config, spec *acidv1.PostgresSpec) *bool {
if spec.ShmVolume != nil && *spec.ShmVolume {
return spec.ShmVolume
}
return opConfig.ShmVolume
}
func (c *Cluster) generatePodTemplate(
namespace string,
labels labels.Set,
annotations map[string]string,
spiloContainer *v1.Container,
initContainers []v1.Container,
sidecarContainers []v1.Container,
tolerationsSpec *[]v1.Toleration,
spiloRunAsUser *int64,
spiloRunAsGroup *int64,
spiloFSGroup *int64,
nodeAffinity *v1.Affinity,
schedulerName *string,
terminateGracePeriod int64,
podServiceAccountName string,
kubeIAMRole string,
priorityClassName string,
shmVolume *bool,
podAntiAffinity bool,
podAntiAffinityTopologyKey string,
additionalSecretMount string,
additionalSecretMountPath string,
additionalVolumes []acidv1.AdditionalVolume,
) (*v1.PodTemplateSpec, error) {
terminateGracePeriodSeconds := terminateGracePeriod
containers := []v1.Container{*spiloContainer}
containers = append(containers, sidecarContainers...)
securityContext := v1.PodSecurityContext{}
if spiloRunAsUser != nil {
securityContext.RunAsUser = spiloRunAsUser
}
if spiloRunAsGroup != nil {
securityContext.RunAsGroup = spiloRunAsGroup
}
if spiloFSGroup != nil {
securityContext.FSGroup = spiloFSGroup
}
podSpec := v1.PodSpec{
ServiceAccountName: podServiceAccountName,
TerminationGracePeriodSeconds: &terminateGracePeriodSeconds,
Containers: containers,
InitContainers: initContainers,
Tolerations: *tolerationsSpec,
SecurityContext: &securityContext,
}
if schedulerName != nil {
podSpec.SchedulerName = *schedulerName
}
if shmVolume != nil && *shmVolume {
addShmVolume(&podSpec)
}
if podAntiAffinity {
podSpec.Affinity = generatePodAffinity(labels, podAntiAffinityTopologyKey, nodeAffinity)
} else if nodeAffinity != nil {
podSpec.Affinity = nodeAffinity
}
if priorityClassName != "" {
podSpec.PriorityClassName = priorityClassName
}
if additionalSecretMount != "" {
addSecretVolume(&podSpec, additionalSecretMount, additionalSecretMountPath)
}
if additionalVolumes != nil {
c.addAdditionalVolumes(&podSpec, additionalVolumes)
}
template := v1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: labels,
Namespace: namespace,
Annotations: annotations,
},
Spec: podSpec,
}
if kubeIAMRole != "" {
if template.Annotations == nil {
template.Annotations = make(map[string]string)
}
template.Annotations[constants.KubeIAmAnnotation] = kubeIAMRole
}
return &template, nil
}
// generatePodEnvVars generates environment variables for the Spilo Pod
func (c *Cluster) generateSpiloPodEnvVars(uid types.UID, spiloConfiguration string, cloneDescription *acidv1.CloneDescription, standbyDescription *acidv1.StandbyDescription, customPodEnvVarsList []v1.EnvVar) []v1.EnvVar {
envVars := []v1.EnvVar{
{
Name: "SCOPE",
Value: c.Name,
},
{
Name: "PGROOT",
Value: constants.PostgresDataPath,
},
{
Name: "POD_IP",
ValueFrom: &v1.EnvVarSource{
FieldRef: &v1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "status.podIP",
},
},
},
{
Name: "POD_NAMESPACE",
ValueFrom: &v1.EnvVarSource{
FieldRef: &v1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "metadata.namespace",
},
},
},
{
Name: "PGUSER_SUPERUSER",
Value: c.OpConfig.SuperUsername,
},
{
Name: "KUBERNETES_SCOPE_LABEL",
Value: c.OpConfig.ClusterNameLabel,
},
{
Name: "KUBERNETES_ROLE_LABEL",
Value: c.OpConfig.PodRoleLabel,
},
{
Name: "PGPASSWORD_SUPERUSER",
ValueFrom: &v1.EnvVarSource{
SecretKeyRef: &v1.SecretKeySelector{
LocalObjectReference: v1.LocalObjectReference{
Name: c.credentialSecretName(c.OpConfig.SuperUsername),
},
Key: "password",
},
},
},
{
Name: "PGUSER_STANDBY",
Value: c.OpConfig.ReplicationUsername,
},
{
Name: "PGPASSWORD_STANDBY",
ValueFrom: &v1.EnvVarSource{
SecretKeyRef: &v1.SecretKeySelector{
LocalObjectReference: v1.LocalObjectReference{
Name: c.credentialSecretName(c.OpConfig.ReplicationUsername),
},
Key: "password",
},
},
},
{
Name: "PAM_OAUTH2",
Value: c.OpConfig.PamConfiguration,
},
{
Name: "HUMAN_ROLE",
Value: c.OpConfig.PamRoleName,
},
}
if c.OpConfig.EnablePgVersionEnvVar {
envVars = append(envVars, v1.EnvVar{Name: "PGVERSION", Value: c.GetDesiredMajorVersion()})
}
// Spilo expects cluster labels as JSON
if clusterLabels, err := json.Marshal(labels.Set(c.OpConfig.ClusterLabels)); err != nil {
envVars = append(envVars, v1.EnvVar{Name: "KUBERNETES_LABELS", Value: labels.Set(c.OpConfig.ClusterLabels).String()})
} else {
envVars = append(envVars, v1.EnvVar{Name: "KUBERNETES_LABELS", Value: string(clusterLabels)})
}
if spiloConfiguration != "" {
envVars = append(envVars, v1.EnvVar{Name: "SPILO_CONFIGURATION", Value: spiloConfiguration})
}
if c.patroniUsesKubernetes() {
envVars = append(envVars, v1.EnvVar{Name: "DCS_ENABLE_KUBERNETES_API", Value: "true"})
} else {
envVars = append(envVars, v1.EnvVar{Name: "ETCD_HOST", Value: c.OpConfig.EtcdHost})
}
if c.patroniKubernetesUseConfigMaps() {
envVars = append(envVars, v1.EnvVar{Name: "KUBERNETES_USE_CONFIGMAPS", Value: "true"})
}
if cloneDescription != nil && cloneDescription.ClusterName != "" {
envVars = append(envVars, c.generateCloneEnvironment(cloneDescription)...)
}
if c.Spec.StandbyCluster != nil {
envVars = append(envVars, c.generateStandbyEnvironment(standbyDescription)...)
}
// add vars taken from pod_environment_configmap and pod_environment_secret first
// (to allow them to override the globals set in the operator config)
if len(customPodEnvVarsList) > 0 {
envVars = append(envVars, customPodEnvVarsList...)
}
if c.OpConfig.WALES3Bucket != "" {
envVars = append(envVars, v1.EnvVar{Name: "WAL_S3_BUCKET", Value: c.OpConfig.WALES3Bucket})
envVars = append(envVars, v1.EnvVar{Name: "WAL_BUCKET_SCOPE_SUFFIX", Value: getBucketScopeSuffix(string(uid))})
envVars = append(envVars, v1.EnvVar{Name: "WAL_BUCKET_SCOPE_PREFIX", Value: ""})
}
if c.OpConfig.WALGSBucket != "" {
envVars = append(envVars, v1.EnvVar{Name: "WAL_GS_BUCKET", Value: c.OpConfig.WALGSBucket})
envVars = append(envVars, v1.EnvVar{Name: "WAL_BUCKET_SCOPE_SUFFIX", Value: getBucketScopeSuffix(string(uid))})
envVars = append(envVars, v1.EnvVar{Name: "WAL_BUCKET_SCOPE_PREFIX", Value: ""})
}
if c.OpConfig.GCPCredentials != "" {
envVars = append(envVars, v1.EnvVar{Name: "GOOGLE_APPLICATION_CREDENTIALS", Value: c.OpConfig.GCPCredentials})
}
if c.OpConfig.LogS3Bucket != "" {
envVars = append(envVars, v1.EnvVar{Name: "LOG_S3_BUCKET", Value: c.OpConfig.LogS3Bucket})
envVars = append(envVars, v1.EnvVar{Name: "LOG_BUCKET_SCOPE_SUFFIX", Value: getBucketScopeSuffix(string(uid))})
envVars = append(envVars, v1.EnvVar{Name: "LOG_BUCKET_SCOPE_PREFIX", Value: ""})
}
return envVars
}
// deduplicateEnvVars makes sure there are no duplicate in the target envVar array. While Kubernetes already
// deduplicates variables defined in a container, it leaves the last definition in the list and this behavior is not
// well-documented, which means that the behavior can be reversed at some point (it may also start producing an error).
// Therefore, the merge is done by the operator, the entries that are ahead in the passed list take priority over those
// that are behind, and only the name is considered in order to eliminate duplicates.
func deduplicateEnvVars(input []v1.EnvVar, containerName string, logger *logrus.Entry) []v1.EnvVar {
result := make([]v1.EnvVar, 0)
names := make(map[string]int)
for i, va := range input {
if names[va.Name] == 0 {
names[va.Name]++
result = append(result, input[i])
} else if names[va.Name] == 1 {
names[va.Name]++
// Some variables (those to configure the WAL_ and LOG_ shipping) may be overwritten, only log as info
if strings.HasPrefix(va.Name, "WAL_") || strings.HasPrefix(va.Name, "LOG_") {
logger.Infof("global variable %q has been overwritten by configmap/secret for container %q",
va.Name, containerName)
} else {
logger.Warningf("variable %q is defined in %q more than once, the subsequent definitions are ignored",
va.Name, containerName)
}
}
}
return result
}
// Return list of variables the pod recieved from the configured ConfigMap
func (c *Cluster) getPodEnvironmentConfigMapVariables() ([]v1.EnvVar, error) {
configMapPodEnvVarsList := make([]v1.EnvVar, 0)
if c.OpConfig.PodEnvironmentConfigMap.Name == "" {
return configMapPodEnvVarsList, nil
}
cm, err := c.KubeClient.ConfigMaps(c.OpConfig.PodEnvironmentConfigMap.Namespace).Get(
context.TODO(),
c.OpConfig.PodEnvironmentConfigMap.Name,
metav1.GetOptions{})
if err != nil {
// if not found, try again using the cluster's namespace if it's different (old behavior)
if k8sutil.ResourceNotFound(err) && c.Namespace != c.OpConfig.PodEnvironmentConfigMap.Namespace {
cm, err = c.KubeClient.ConfigMaps(c.Namespace).Get(
context.TODO(),
c.OpConfig.PodEnvironmentConfigMap.Name,
metav1.GetOptions{})
}
if err != nil {
return nil, fmt.Errorf("could not read PodEnvironmentConfigMap: %v", err)
}
}
for k, v := range cm.Data {
configMapPodEnvVarsList = append(configMapPodEnvVarsList, v1.EnvVar{Name: k, Value: v})
}
return configMapPodEnvVarsList, nil
}
// Return list of variables the pod received from the configured Secret
func (c *Cluster) getPodEnvironmentSecretVariables() ([]v1.EnvVar, error) {
secretPodEnvVarsList := make([]v1.EnvVar, 0)
if c.OpConfig.PodEnvironmentSecret == "" {
return secretPodEnvVarsList, nil
}
secret, err := c.KubeClient.Secrets(c.Namespace).Get(
context.TODO(),
c.OpConfig.PodEnvironmentSecret,
metav1.GetOptions{})
if err != nil {
return nil, fmt.Errorf("could not read Secret PodEnvironmentSecretName: %v", err)
}
for k := range secret.Data {
secretPodEnvVarsList = append(secretPodEnvVarsList,
v1.EnvVar{Name: k, ValueFrom: &v1.EnvVarSource{
SecretKeyRef: &v1.SecretKeySelector{
LocalObjectReference: v1.LocalObjectReference{
Name: c.OpConfig.PodEnvironmentSecret,
},
Key: k,
},
}})
}
return secretPodEnvVarsList, nil
}
func getSidecarContainer(sidecar acidv1.Sidecar, index int, resources *v1.ResourceRequirements) *v1.Container {
name := sidecar.Name
if name == "" {
name = fmt.Sprintf("sidecar-%d", index)
}
return &v1.Container{
Name: name,
Image: sidecar.DockerImage,
ImagePullPolicy: v1.PullIfNotPresent,
Resources: *resources,
Env: sidecar.Env,
Ports: sidecar.Ports,
}
}
func getBucketScopeSuffix(uid string) string {
if uid != "" {
return fmt.Sprintf("/%s", uid)
}
return ""
}
func makeResources(cpuRequest, memoryRequest, cpuLimit, memoryLimit string) acidv1.Resources {
return acidv1.Resources{
ResourceRequests: acidv1.ResourceDescription{
CPU: cpuRequest,
Memory: memoryRequest,
},
ResourceLimits: acidv1.ResourceDescription{
CPU: cpuLimit,
Memory: memoryLimit,
},
}
}
func extractPgVersionFromBinPath(binPath string, template string) (string, error) {
var pgVersion float32
_, err := fmt.Sscanf(binPath, template, &pgVersion)
if err != nil {
return "", err
}
return fmt.Sprintf("%v", pgVersion), nil
}
func (c *Cluster) generateStatefulSet(spec *acidv1.PostgresSpec) (*appsv1.StatefulSet, error) {
var (
err error
initContainers []v1.Container
sidecarContainers []v1.Container
podTemplate *v1.PodTemplateSpec
volumeClaimTemplate *v1.PersistentVolumeClaim
additionalVolumes = spec.AdditionalVolumes
)
// Improve me. Please.
if c.OpConfig.SetMemoryRequestToLimit {
// controller adjusts the default memory request at operator startup
request := spec.Resources.ResourceRequests.Memory
if request == "" {
request = c.OpConfig.Resources.DefaultMemoryRequest
}
limit := spec.Resources.ResourceLimits.Memory
if limit == "" {
limit = c.OpConfig.Resources.DefaultMemoryLimit
}
isSmaller, err := util.IsSmallerQuantity(request, limit)
if err != nil {
return nil, err
}
if isSmaller {
c.logger.Warningf("The memory request of %v for the Postgres container is increased to match the memory limit of %v.", request, limit)
spec.Resources.ResourceRequests.Memory = limit
}
// controller adjusts the Scalyr sidecar request at operator startup
// as this sidecar is managed separately
// adjust sidecar containers defined for that particular cluster
for _, sidecar := range spec.Sidecars {
// TODO #413
sidecarRequest := sidecar.Resources.ResourceRequests.Memory
if request == "" {
request = c.OpConfig.Resources.DefaultMemoryRequest
}
sidecarLimit := sidecar.Resources.ResourceLimits.Memory
if limit == "" {
limit = c.OpConfig.Resources.DefaultMemoryLimit
}
isSmaller, err := util.IsSmallerQuantity(sidecarRequest, sidecarLimit)
if err != nil {
return nil, err
}
if isSmaller {
c.logger.Warningf("The memory request of %v for the %v sidecar container is increased to match the memory limit of %v.", sidecar.Resources.ResourceRequests.Memory, sidecar.Name, sidecar.Resources.ResourceLimits.Memory)
sidecar.Resources.ResourceRequests.Memory = sidecar.Resources.ResourceLimits.Memory
}
}
}
defaultResources := c.makeDefaultResources()
resourceRequirements, err := generateResourceRequirements(spec.Resources, defaultResources)
if err != nil {
return nil, fmt.Errorf("could not generate resource requirements: %v", err)
}