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statefulset.go
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statefulset.go
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// Copyright 2016 The prometheus-operator Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package prometheus
import (
"fmt"
"net/url"
"os"
"path"
"path/filepath"
"strings"
"github.com/prometheus-operator/prometheus-operator/pkg/webconfig"
appsv1 "k8s.io/api/apps/v1"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/intstr"
"github.com/blang/semver/v4"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/pkg/errors"
monitoringv1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1"
"github.com/prometheus-operator/prometheus-operator/pkg/k8sutil"
"github.com/prometheus-operator/prometheus-operator/pkg/operator"
)
const (
governingServiceName = "prometheus-operated"
defaultRetention = "24h"
defaultReplicaExternalLabelName = "prometheus_replica"
storageDir = "/prometheus"
confDir = "/etc/prometheus/config"
confOutDir = "/etc/prometheus/config_out"
webConfigDir = "/etc/prometheus/web_config"
tlsAssetsDir = "/etc/prometheus/certs"
rulesDir = "/etc/prometheus/rules"
secretsDir = "/etc/prometheus/secrets/"
configmapsDir = "/etc/prometheus/configmaps/"
configFilename = "prometheus.yaml.gz"
configEnvsubstFilename = "prometheus.env.yaml"
sSetInputHashName = "prometheus-operator-input-hash"
defaultPortName = "web"
)
var (
minShards int32 = 1
minReplicas int32 = 1
defaultMaxConcurrency int32 = 20
managedByOperatorLabel = "managed-by"
managedByOperatorLabelValue = "prometheus-operator"
managedByOperatorLabels = map[string]string{
managedByOperatorLabel: managedByOperatorLabelValue,
}
shardLabelName = "operator.prometheus.io/shard"
prometheusNameLabelName = "operator.prometheus.io/name"
probeTimeoutSeconds int32 = 3
)
func expectedStatefulSetShardNames(
p *monitoringv1.Prometheus,
) []string {
res := []string{}
shards := minShards
if p.Spec.Shards != nil && *p.Spec.Shards > 1 {
shards = *p.Spec.Shards
}
for i := int32(0); i < shards; i++ {
res = append(res, prometheusNameByShard(p.Name, i))
}
return res
}
func prometheusNameByShard(name string, shard int32) string {
base := prefixedName(name)
if shard == 0 {
return base
}
return fmt.Sprintf("%s-shard-%d", base, shard)
}
func makeStatefulSet(
name string,
p monitoringv1.Prometheus,
config *operator.Config,
ruleConfigMapNames []string,
inputHash string,
shard int32,
tlsAssetSecrets []string,
) (*appsv1.StatefulSet, error) {
// p is passed in by value, not by reference. But p contains references like
// to annotation map, that do not get copied on function invocation. Ensure to
// prevent side effects before editing p by creating a deep copy. For more
// details see https://github.com/prometheus-operator/prometheus-operator/issues/1659.
p = *p.DeepCopy()
promVersion := operator.StringValOrDefault(p.Spec.Version, operator.DefaultPrometheusVersion)
parsedVersion, err := semver.ParseTolerant(promVersion)
if err != nil {
return nil, errors.Wrap(err, "failed to parse prometheus version")
}
if p.Spec.PortName == "" {
p.Spec.PortName = defaultPortName
}
if p.Spec.Replicas == nil {
p.Spec.Replicas = &minReplicas
}
intZero := int32(0)
if p.Spec.Replicas != nil && *p.Spec.Replicas < 0 {
p.Spec.Replicas = &intZero
}
if p.Spec.Resources.Requests == nil {
p.Spec.Resources.Requests = v1.ResourceList{}
}
_, memoryRequestFound := p.Spec.Resources.Requests[v1.ResourceMemory]
memoryLimit, memoryLimitFound := p.Spec.Resources.Limits[v1.ResourceMemory]
if !memoryRequestFound && parsedVersion.Major == 1 {
defaultMemoryRequest := resource.MustParse("2Gi")
compareResult := memoryLimit.Cmp(defaultMemoryRequest)
// If limit is given and smaller or equal to 2Gi, then set memory
// request to the given limit. This is necessary as if limit < request,
// then a Pod is not schedulable.
if memoryLimitFound && compareResult <= 0 {
p.Spec.Resources.Requests[v1.ResourceMemory] = memoryLimit
} else {
p.Spec.Resources.Requests[v1.ResourceMemory] = defaultMemoryRequest
}
}
spec, err := makeStatefulSetSpec(p, config, shard, ruleConfigMapNames, tlsAssetSecrets, parsedVersion)
if err != nil {
return nil, errors.Wrap(err, "make StatefulSet spec")
}
boolTrue := true
// do not transfer kubectl annotations to the statefulset so it is not
// pruned by kubectl
annotations := make(map[string]string)
for key, value := range p.ObjectMeta.Annotations {
if !strings.HasPrefix(key, "kubectl.kubernetes.io/") {
annotations[key] = value
}
}
labels := make(map[string]string)
for key, value := range p.ObjectMeta.Labels {
labels[key] = value
}
labels[shardLabelName] = fmt.Sprintf("%d", shard)
labels[prometheusNameLabelName] = p.Name
statefulset := &appsv1.StatefulSet{
ObjectMeta: metav1.ObjectMeta{
Name: name,
Labels: config.Labels.Merge(labels),
Annotations: annotations,
OwnerReferences: []metav1.OwnerReference{
{
APIVersion: p.APIVersion,
BlockOwnerDeletion: &boolTrue,
Controller: &boolTrue,
Kind: p.Kind,
Name: p.Name,
UID: p.UID,
},
},
},
Spec: *spec,
}
if statefulset.ObjectMeta.Annotations == nil {
statefulset.ObjectMeta.Annotations = map[string]string{
sSetInputHashName: inputHash,
}
} else {
statefulset.ObjectMeta.Annotations[sSetInputHashName] = inputHash
}
if p.Spec.ImagePullSecrets != nil && len(p.Spec.ImagePullSecrets) > 0 {
statefulset.Spec.Template.Spec.ImagePullSecrets = p.Spec.ImagePullSecrets
}
storageSpec := p.Spec.Storage
if storageSpec == nil {
statefulset.Spec.Template.Spec.Volumes = append(statefulset.Spec.Template.Spec.Volumes, v1.Volume{
Name: volumeName(p.Name),
VolumeSource: v1.VolumeSource{
EmptyDir: &v1.EmptyDirVolumeSource{},
},
})
} else if storageSpec.EmptyDir != nil {
emptyDir := storageSpec.EmptyDir
statefulset.Spec.Template.Spec.Volumes = append(statefulset.Spec.Template.Spec.Volumes, v1.Volume{
Name: volumeName(p.Name),
VolumeSource: v1.VolumeSource{
EmptyDir: emptyDir,
},
})
} else if storageSpec.Ephemeral != nil {
ephemeral := storageSpec.Ephemeral
statefulset.Spec.Template.Spec.Volumes = append(statefulset.Spec.Template.Spec.Volumes, v1.Volume{
Name: volumeName(p.Name),
VolumeSource: v1.VolumeSource{
Ephemeral: ephemeral,
},
})
} else {
pvcTemplate := operator.MakeVolumeClaimTemplate(storageSpec.VolumeClaimTemplate)
if pvcTemplate.Name == "" {
pvcTemplate.Name = volumeName(p.Name)
}
if storageSpec.VolumeClaimTemplate.Spec.AccessModes == nil {
pvcTemplate.Spec.AccessModes = []v1.PersistentVolumeAccessMode{v1.ReadWriteOnce}
} else {
pvcTemplate.Spec.AccessModes = storageSpec.VolumeClaimTemplate.Spec.AccessModes
}
pvcTemplate.Spec.Resources = storageSpec.VolumeClaimTemplate.Spec.Resources
pvcTemplate.Spec.Selector = storageSpec.VolumeClaimTemplate.Spec.Selector
statefulset.Spec.VolumeClaimTemplates = append(statefulset.Spec.VolumeClaimTemplates, *pvcTemplate)
}
statefulset.Spec.Template.Spec.Volumes = append(statefulset.Spec.Template.Spec.Volumes, p.Spec.Volumes...)
return statefulset, nil
}
func makeEmptyConfigurationSecret(p *monitoringv1.Prometheus, config operator.Config) (*v1.Secret, error) {
s := makeConfigSecret(p, config)
s.ObjectMeta.Annotations = map[string]string{
"empty": "true",
}
return s, nil
}
func makeConfigSecret(p *monitoringv1.Prometheus, config operator.Config) *v1.Secret {
boolTrue := true
return &v1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: configSecretName(p.Name),
Labels: config.Labels.Merge(managedByOperatorLabels),
OwnerReferences: []metav1.OwnerReference{
{
APIVersion: p.APIVersion,
BlockOwnerDeletion: &boolTrue,
Controller: &boolTrue,
Kind: p.Kind,
Name: p.Name,
UID: p.UID,
},
},
},
Data: map[string][]byte{
configFilename: {},
},
}
}
func makeStatefulSetService(p *monitoringv1.Prometheus, config operator.Config) *v1.Service {
p = p.DeepCopy()
if p.Spec.PortName == "" {
p.Spec.PortName = defaultPortName
}
svc := &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: governingServiceName,
OwnerReferences: []metav1.OwnerReference{
{
Name: p.GetName(),
Kind: p.Kind,
APIVersion: p.APIVersion,
UID: p.GetUID(),
},
},
Labels: config.Labels.Merge(map[string]string{
"operated-prometheus": "true",
}),
},
Spec: v1.ServiceSpec{
ClusterIP: "None",
Ports: []v1.ServicePort{
{
Name: p.Spec.PortName,
Port: 9090,
TargetPort: intstr.FromString(p.Spec.PortName),
},
},
Selector: map[string]string{
"app.kubernetes.io/name": "prometheus",
},
},
}
if p.Spec.Thanos != nil {
svc.Spec.Ports = append(svc.Spec.Ports, v1.ServicePort{
Name: "grpc",
Port: 10901,
TargetPort: intstr.FromString("grpc"),
})
}
return svc
}
func makeStatefulSetSpec(p monitoringv1.Prometheus, c *operator.Config, shard int32, ruleConfigMapNames []string,
tlsAssetSecrets []string, version semver.Version) (*appsv1.StatefulSetSpec, error) {
prometheusImagePath, err := operator.BuildImagePath(
operator.StringPtrValOrDefault(p.Spec.Image, ""),
operator.StringValOrDefault(p.Spec.BaseImage, c.PrometheusDefaultBaseImage),
p.Spec.Version,
p.Spec.Tag,
p.Spec.SHA,
)
if err != nil {
return nil, err
}
if version.Major != 2 {
return nil, errors.Errorf("unsupported Prometheus major version %s", version)
}
// TODO(slashpai): Refactor the code to cover logging for all components
logger := log.NewLogfmtLogger(log.NewSyncWriter(os.Stderr))
promArgs := []string{
"-web.console.templates=/etc/prometheus/consoles",
"-web.console.libraries=/etc/prometheus/console_libraries",
}
retentionTimeFlag := "-storage.tsdb.retention="
if version.GTE(semver.MustParse("2.7.0")) {
retentionTimeFlag = "-storage.tsdb.retention.time="
if p.Spec.Retention == "" && p.Spec.RetentionSize == "" {
promArgs = append(promArgs, retentionTimeFlag+defaultRetention)
} else {
if p.Spec.Retention != "" {
promArgs = append(promArgs, retentionTimeFlag+p.Spec.Retention)
}
if p.Spec.RetentionSize != "" {
promArgs = append(promArgs,
fmt.Sprintf("-storage.tsdb.retention.size=%s", p.Spec.RetentionSize),
)
}
}
} else {
if p.Spec.Retention == "" {
promArgs = append(promArgs, retentionTimeFlag+defaultRetention)
} else {
promArgs = append(promArgs, retentionTimeFlag+p.Spec.Retention)
}
}
promArgs = append(promArgs,
fmt.Sprintf("-config.file=%s", path.Join(confOutDir, configEnvsubstFilename)),
fmt.Sprintf("-storage.tsdb.path=%s", storageDir),
"-web.enable-lifecycle",
)
if p.Spec.Query != nil && p.Spec.Query.LookbackDelta != nil {
promArgs = append(promArgs,
fmt.Sprintf("-query.lookback-delta=%s", *p.Spec.Query.LookbackDelta),
)
}
if version.Minor >= 4 {
if p.Spec.Rules.Alert.ForOutageTolerance != "" {
promArgs = append(promArgs, "-rules.alert.for-outage-tolerance="+p.Spec.Rules.Alert.ForOutageTolerance)
}
if p.Spec.Rules.Alert.ForGracePeriod != "" {
promArgs = append(promArgs, "-rules.alert.for-grace-period="+p.Spec.Rules.Alert.ForGracePeriod)
}
if p.Spec.Rules.Alert.ResendDelay != "" {
promArgs = append(promArgs, "-rules.alert.resend-delay="+p.Spec.Rules.Alert.ResendDelay)
}
}
if version.Minor >= 5 {
if p.Spec.Query != nil && p.Spec.Query.MaxSamples != nil {
promArgs = append(promArgs,
fmt.Sprintf("-query.max-samples=%d", *p.Spec.Query.MaxSamples),
)
}
}
if p.Spec.Query != nil {
if p.Spec.Query.MaxConcurrency != nil {
if *p.Spec.Query.MaxConcurrency < 1 {
p.Spec.Query.MaxConcurrency = &defaultMaxConcurrency
}
promArgs = append(promArgs,
fmt.Sprintf("-query.max-concurrency=%d", *p.Spec.Query.MaxConcurrency),
)
}
if p.Spec.Query.Timeout != nil {
promArgs = append(promArgs,
fmt.Sprintf("-query.timeout=%s", *p.Spec.Query.Timeout),
)
}
}
if p.Spec.Web != nil && p.Spec.Web.PageTitle != nil {
promArgs = append(promArgs,
fmt.Sprintf("-web.page-title=%s", *p.Spec.Web.PageTitle),
)
}
if p.Spec.EnableAdminAPI {
promArgs = append(promArgs, "-web.enable-admin-api")
}
if p.Spec.EnableRemoteWriteReceiver {
if version.GTE(semver.MustParse("2.33.0")) {
promArgs = append(promArgs, "-web.enable-remote-write-receiver")
} else {
level.Warn(logger).Log("msg", fmt.Sprintf("ignoring \"enableRemoteWriteReceiver\" not supported by Prometheus version=%s minimum_version=2.33.0", version))
}
}
if len(p.Spec.EnableFeatures) > 0 {
promArgs = append(promArgs, "-enable-feature="+strings.Join(p.Spec.EnableFeatures[:], ","))
}
if p.Spec.ExternalURL != "" {
promArgs = append(promArgs, "-web.external-url="+p.Spec.ExternalURL)
}
webRoutePrefix := "/"
if p.Spec.RoutePrefix != "" {
webRoutePrefix = p.Spec.RoutePrefix
}
promArgs = append(promArgs, "-web.route-prefix="+webRoutePrefix)
if p.Spec.LogLevel != "" && p.Spec.LogLevel != "info" {
promArgs = append(promArgs, fmt.Sprintf("-log.level=%s", p.Spec.LogLevel))
}
if version.GTE(semver.MustParse("2.6.0")) {
if p.Spec.LogFormat != "" && p.Spec.LogFormat != "logfmt" {
promArgs = append(promArgs, fmt.Sprintf("-log.format=%s", p.Spec.LogFormat))
}
}
if version.GTE(semver.MustParse("2.11.0")) && p.Spec.WALCompression != nil {
if *p.Spec.WALCompression {
promArgs = append(promArgs, "-storage.tsdb.wal-compression")
} else {
promArgs = append(promArgs, "-no-storage.tsdb.wal-compression")
}
}
if version.GTE(semver.MustParse("2.8.0")) && p.Spec.AllowOverlappingBlocks {
promArgs = append(promArgs, "-storage.tsdb.allow-overlapping-blocks")
}
var ports []v1.ContainerPort
if p.Spec.ListenLocal {
promArgs = append(promArgs, "-web.listen-address=127.0.0.1:9090")
} else {
ports = []v1.ContainerPort{
{
Name: p.Spec.PortName,
ContainerPort: 9090,
Protocol: v1.ProtocolTCP,
},
}
}
for i, a := range promArgs {
promArgs[i] = "-" + a
}
assetsVolume := v1.Volume{
Name: "tls-assets",
VolumeSource: v1.VolumeSource{
Projected: &v1.ProjectedVolumeSource{
Sources: []v1.VolumeProjection{},
},
},
}
for _, assetShard := range tlsAssetSecrets {
assetsVolume.Projected.Sources = append(assetsVolume.Projected.Sources,
v1.VolumeProjection{
Secret: &v1.SecretProjection{
LocalObjectReference: v1.LocalObjectReference{Name: assetShard},
},
})
}
volumes := []v1.Volume{
{
Name: "config",
VolumeSource: v1.VolumeSource{
Secret: &v1.SecretVolumeSource{
SecretName: configSecretName(p.Name),
},
},
},
assetsVolume,
{
Name: "config-out",
VolumeSource: v1.VolumeSource{
EmptyDir: &v1.EmptyDirVolumeSource{},
},
},
}
if p.Spec.QueryLogFile != "" && filepath.Dir(p.Spec.QueryLogFile) == "." {
volumes = append(volumes, v1.Volume{
Name: "query-log-file",
VolumeSource: v1.VolumeSource{
EmptyDir: &v1.EmptyDirVolumeSource{},
},
})
}
for _, name := range ruleConfigMapNames {
volumes = append(volumes, v1.Volume{
Name: name,
VolumeSource: v1.VolumeSource{
ConfigMap: &v1.ConfigMapVolumeSource{
LocalObjectReference: v1.LocalObjectReference{
Name: name,
},
},
},
})
}
volName := volumeName(p.Name)
if p.Spec.Storage != nil {
if p.Spec.Storage.VolumeClaimTemplate.Name != "" {
volName = p.Spec.Storage.VolumeClaimTemplate.Name
}
}
promVolumeMounts := []v1.VolumeMount{
{
Name: "config-out",
ReadOnly: true,
MountPath: confOutDir,
},
{
Name: "tls-assets",
ReadOnly: true,
MountPath: tlsAssetsDir,
},
{
Name: volName,
MountPath: storageDir,
SubPath: subPathForStorage(p.Spec.Storage),
},
}
promVolumeMounts = append(promVolumeMounts, p.Spec.VolumeMounts...)
for _, name := range ruleConfigMapNames {
promVolumeMounts = append(promVolumeMounts, v1.VolumeMount{
Name: name,
MountPath: rulesDir + "/" + name,
})
}
if p.Spec.QueryLogFile != "" && filepath.Dir(p.Spec.QueryLogFile) == "." {
promVolumeMounts = append(promVolumeMounts, v1.VolumeMount{
Name: "query-log-file",
ReadOnly: false,
MountPath: "/var/log/prometheus",
})
}
// Mount web config and web TLS credentials as volumes.
// We always mount the web config file for versions greater than 2.24.0.
// With this we avoid redeploying prometheus when reconfiguring between
// HTTP and HTTPS and vice-versa.
if version.GTE(semver.MustParse("2.24.0")) {
var webTLSConfig *monitoringv1.WebTLSConfig
if p.Spec.Web != nil {
webTLSConfig = p.Spec.Web.TLSConfig
}
webConfig, err := webconfig.New(webConfigDir, WebConfigSecretName(p.Name), webTLSConfig)
if err != nil {
return nil, err
}
confArg, configVol, configMount := webConfig.GetMountParameters()
promArgs = append(promArgs, confArg)
volumes = append(volumes, configVol...)
promVolumeMounts = append(promVolumeMounts, configMount...)
}
// Mount related secrets
for _, s := range p.Spec.Secrets {
volumes = append(volumes, v1.Volume{
Name: k8sutil.SanitizeVolumeName("secret-" + s),
VolumeSource: v1.VolumeSource{
Secret: &v1.SecretVolumeSource{
SecretName: s,
},
},
})
promVolumeMounts = append(promVolumeMounts, v1.VolumeMount{
Name: k8sutil.SanitizeVolumeName("secret-" + s),
ReadOnly: true,
MountPath: secretsDir + s,
})
}
for _, c := range p.Spec.ConfigMaps {
volumes = append(volumes, v1.Volume{
Name: k8sutil.SanitizeVolumeName("configmap-" + c),
VolumeSource: v1.VolumeSource{
ConfigMap: &v1.ConfigMapVolumeSource{
LocalObjectReference: v1.LocalObjectReference{
Name: c,
},
},
},
})
promVolumeMounts = append(promVolumeMounts, v1.VolumeMount{
Name: k8sutil.SanitizeVolumeName("configmap-" + c),
ReadOnly: true,
MountPath: configmapsDir + c,
})
}
probeHandler := func(probePath string) v1.ProbeHandler {
probePath = path.Clean(webRoutePrefix + probePath)
handler := v1.ProbeHandler{}
if p.Spec.ListenLocal {
handler.Exec = &v1.ExecAction{
Command: []string{
"sh",
"-c",
fmt.Sprintf(`if [ -x "$(command -v curl)" ]; then exec curl %[1]s; elif [ -x "$(command -v wget)" ]; then exec wget -q -O /dev/null %[1]s; else exit 1; fi`, fmt.Sprintf("http://localhost:9090%s", probePath)),
},
}
} else {
handler.HTTPGet = &v1.HTTPGetAction{
Path: probePath,
Port: intstr.FromString(p.Spec.PortName),
}
if p.Spec.Web != nil && p.Spec.Web.TLSConfig != nil && version.GTE(semver.MustParse("2.24.0")) {
handler.HTTPGet.Scheme = v1.URISchemeHTTPS
}
}
return handler
}
// The /-/ready handler returns OK only after the TSDB initialization has
// completed. The WAL replay can take a significant time for large setups
// hence we enable the startup probe with a generous failure threshold (15
// minutes) to ensure that the readiness probe only comes into effect once
// Prometheus is effectively ready.
// We don't want to use the /-/healthy handler here because it returns OK as
// soon as the web server is started (irrespective of the WAL replay).
startupProbe := &v1.Probe{
ProbeHandler: probeHandler("/-/ready"),
TimeoutSeconds: probeTimeoutSeconds,
PeriodSeconds: 15,
FailureThreshold: 60,
}
livenessProbe := &v1.Probe{
ProbeHandler: probeHandler("/-/healthy"),
TimeoutSeconds: probeTimeoutSeconds,
PeriodSeconds: 5,
FailureThreshold: 6,
}
readinessProbe := &v1.Probe{
ProbeHandler: probeHandler("/-/ready"),
TimeoutSeconds: probeTimeoutSeconds,
PeriodSeconds: 5,
FailureThreshold: 3,
}
podAnnotations := map[string]string{}
podLabels := map[string]string{
"app.kubernetes.io/version": version.String(),
}
// In cases where an existing selector label is modified, or a new one is added, new sts cannot match existing pods.
// We should try to avoid removing such immutable fields whenever possible since doing
// so forces us to enter the 'recreate cycle' and can potentially lead to downtime.
// The requirement to make a change here should be carefully evaluated.
podSelectorLabels := map[string]string{
"app.kubernetes.io/name": "prometheus",
"app.kubernetes.io/managed-by": "prometheus-operator",
"app.kubernetes.io/instance": p.Name,
"prometheus": p.Name,
shardLabelName: fmt.Sprintf("%d", shard),
prometheusNameLabelName: p.Name,
}
if p.Spec.PodMetadata != nil {
if p.Spec.PodMetadata.Labels != nil {
for k, v := range p.Spec.PodMetadata.Labels {
podLabels[k] = v
}
}
if p.Spec.PodMetadata.Annotations != nil {
for k, v := range p.Spec.PodMetadata.Annotations {
podAnnotations[k] = v
}
}
}
for k, v := range podSelectorLabels {
podLabels[k] = v
}
podAnnotations["kubectl.kubernetes.io/default-container"] = "prometheus"
finalSelectorLabels := c.Labels.Merge(podSelectorLabels)
finalLabels := c.Labels.Merge(podLabels)
var additionalContainers, operatorInitContainers []v1.Container
disableCompaction := p.Spec.DisableCompaction
prometheusURIScheme := "http"
if p.Spec.Web != nil && p.Spec.Web.TLSConfig != nil {
prometheusURIScheme = "https"
}
if p.Spec.Thanos != nil {
thanosImage, err := operator.BuildImagePath(
operator.StringPtrValOrDefault(p.Spec.Thanos.Image, ""),
operator.StringPtrValOrDefault(p.Spec.Thanos.BaseImage, c.ThanosDefaultBaseImage),
operator.StringPtrValOrDefault(p.Spec.Thanos.Version, operator.DefaultThanosVersion),
operator.StringPtrValOrDefault(p.Spec.Thanos.Tag, ""),
operator.StringPtrValOrDefault(p.Spec.Thanos.SHA, ""),
)
if err != nil {
return nil, errors.Wrap(err, "failed to build image path")
}
bindAddress := "" // Listen to all available IP addresses by default
if p.Spec.Thanos.ListenLocal {
bindAddress = "127.0.0.1"
}
thanosArgs := []string{"sidecar",
fmt.Sprintf("--prometheus.url=%s://%s:9090%s", prometheusURIScheme, c.LocalHost, path.Clean(webRoutePrefix)),
fmt.Sprintf("--grpc-address=%s:10901", bindAddress),
fmt.Sprintf("--http-address=%s:10902", bindAddress),
}
if p.Spec.Thanos.GRPCServerTLSConfig != nil {
tls := p.Spec.Thanos.GRPCServerTLSConfig
if tls.CertFile != "" {
thanosArgs = append(thanosArgs, "--grpc-server-tls-cert="+tls.CertFile)
}
if tls.KeyFile != "" {
thanosArgs = append(thanosArgs, "--grpc-server-tls-key="+tls.KeyFile)
}
if tls.CAFile != "" {
thanosArgs = append(thanosArgs, "--grpc-server-tls-client-ca="+tls.CAFile)
}
}
boolFalse := false
boolTrue := true
container := v1.Container{
Name: "thanos-sidecar",
Image: thanosImage,
TerminationMessagePolicy: v1.TerminationMessageFallbackToLogsOnError,
Args: thanosArgs,
SecurityContext: &v1.SecurityContext{
AllowPrivilegeEscalation: &boolFalse,
ReadOnlyRootFilesystem: &boolTrue,
Capabilities: &v1.Capabilities{
Drop: []v1.Capability{"ALL"},
},
},
Ports: []v1.ContainerPort{
{
Name: "http",
ContainerPort: 10902,
},
{
Name: "grpc",
ContainerPort: 10901,
},
},
Resources: p.Spec.Thanos.Resources,
}
for _, thanosSideCarVM := range p.Spec.Thanos.VolumeMounts {
container.VolumeMounts = append(container.VolumeMounts, v1.VolumeMount{
Name: thanosSideCarVM.Name,
MountPath: thanosSideCarVM.MountPath,
})
}
if p.Spec.Thanos.ObjectStorageConfig != nil || p.Spec.Thanos.ObjectStorageConfigFile != nil {
if p.Spec.Thanos.ObjectStorageConfigFile != nil {
container.Args = append(container.Args, "--objstore.config-file="+*p.Spec.Thanos.ObjectStorageConfigFile)
} else {
container.Args = append(container.Args, "--objstore.config=$(OBJSTORE_CONFIG)")
container.Env = append(container.Env, v1.EnvVar{
Name: "OBJSTORE_CONFIG",
ValueFrom: &v1.EnvVarSource{
SecretKeyRef: p.Spec.Thanos.ObjectStorageConfig,
},
})
}
container.Args = append(container.Args, fmt.Sprintf("--tsdb.path=%s", storageDir))
container.VolumeMounts = append(
container.VolumeMounts,
v1.VolumeMount{
Name: volName,
MountPath: storageDir,
SubPath: subPathForStorage(p.Spec.Storage),
},
)
// NOTE(bwplotka): As described in https://thanos.io/components/sidecar.md/ we have to turn off compaction of Prometheus
// to avoid races during upload, if the uploads are configured.
disableCompaction = true
}
if p.Spec.Thanos.TracingConfig != nil || len(p.Spec.Thanos.TracingConfigFile) > 0 {
if len(p.Spec.Thanos.TracingConfigFile) > 0 {
container.Args = append(container.Args, "--tracing.config-file="+p.Spec.Thanos.TracingConfigFile)
} else {
container.Args = append(container.Args, "--tracing.config=$(TRACING_CONFIG)")
container.Env = append(container.Env, v1.EnvVar{
Name: "TRACING_CONFIG",
ValueFrom: &v1.EnvVarSource{
SecretKeyRef: p.Spec.Thanos.TracingConfig,
},
})
}
}
if p.Spec.Thanos.LogLevel != "" {
container.Args = append(container.Args, "--log.level="+p.Spec.Thanos.LogLevel)
} else if p.Spec.LogLevel != "" {
container.Args = append(container.Args, "--log.level="+p.Spec.LogLevel)
}
if p.Spec.Thanos.LogFormat != "" {
container.Args = append(container.Args, "--log.format="+p.Spec.Thanos.LogFormat)
} else if p.Spec.LogFormat != "" {
container.Args = append(container.Args, "--log.format="+p.Spec.LogFormat)
}
if p.Spec.Thanos.MinTime != "" {
container.Args = append(container.Args, "--min-time="+p.Spec.Thanos.MinTime)
}
if p.Spec.Thanos.ReadyTimeout != "" {
container.Args = append(container.Args, "--prometheus.ready_timeout="+p.Spec.Thanos.ReadyTimeout)
}
additionalContainers = append(additionalContainers, container)
}
if disableCompaction {
promArgs = append(promArgs, "--storage.tsdb.max-block-duration=2h")
promArgs = append(promArgs, "--storage.tsdb.min-block-duration=2h")
}
var watchedDirectories []string
configReloaderVolumeMounts := []v1.VolumeMount{
{
Name: "config",
MountPath: confDir,
},
{
Name: "config-out",
MountPath: confOutDir,
},
}
if len(ruleConfigMapNames) != 0 {
for _, name := range ruleConfigMapNames {
mountPath := rulesDir + "/" + name
configReloaderVolumeMounts = append(configReloaderVolumeMounts, v1.VolumeMount{
Name: name,
MountPath: mountPath,
})
watchedDirectories = append(watchedDirectories, mountPath)
}
}
var (
minReadySeconds int32
terminationGracePeriod int64
)
if p.Spec.MinReadySeconds != nil {
minReadySeconds = int32(*p.Spec.MinReadySeconds)
}
if p.Spec.TerminationGracePeriodSeconds != nil {
terminationGracePeriod = int64(*p.Spec.TerminationGracePeriodSeconds)
}
operatorInitContainers = append(operatorInitContainers,
operator.CreateConfigReloader(
"init-config-reloader",
operator.ReloaderResources(c.ReloaderConfig),
operator.ReloaderRunOnce(),
operator.LogFormat(p.Spec.LogFormat),
operator.LogLevel(p.Spec.LogLevel),
operator.VolumeMounts(configReloaderVolumeMounts),
operator.ConfigFile(path.Join(confDir, configFilename)),
operator.ConfigEnvsubstFile(path.Join(confOutDir, configEnvsubstFilename)),
operator.WatchedDirectories(watchedDirectories),
operator.Shard(shard),
),
)
initContainers, err := k8sutil.MergePatchContainers(operatorInitContainers, p.Spec.InitContainers)
if err != nil {
return nil, errors.Wrap(err, "failed to merge init containers spec")
}
boolFalse := false
boolTrue := true
operatorContainers := append([]v1.Container{
{
Name: "prometheus",
Image: prometheusImagePath,
Ports: ports,
Args: promArgs,
VolumeMounts: promVolumeMounts,
StartupProbe: startupProbe,
LivenessProbe: livenessProbe,
ReadinessProbe: readinessProbe,
Resources: p.Spec.Resources,
TerminationMessagePolicy: v1.TerminationMessageFallbackToLogsOnError,
SecurityContext: &v1.SecurityContext{
ReadOnlyRootFilesystem: &boolTrue,
AllowPrivilegeEscalation: &boolFalse,
Capabilities: &v1.Capabilities{
Drop: []v1.Capability{"ALL"},
},
},
},
operator.CreateConfigReloader(
"config-reloader",
operator.ReloaderResources(c.ReloaderConfig),
operator.ReloaderURL(url.URL{
Scheme: prometheusURIScheme,
Host: c.LocalHost + ":9090",
Path: path.Clean(webRoutePrefix + "/-/reload"),
}),
operator.ListenLocal(p.Spec.ListenLocal),
operator.LocalHost(c.LocalHost),
operator.LogFormat(p.Spec.LogFormat),
operator.LogLevel(p.Spec.LogLevel),
operator.ConfigFile(path.Join(confDir, configFilename)),
operator.ConfigEnvsubstFile(path.Join(confOutDir, configEnvsubstFilename)),
operator.WatchedDirectories(watchedDirectories), operator.VolumeMounts(configReloaderVolumeMounts),
operator.Shard(shard),
),
}, additionalContainers...)
containers, err := k8sutil.MergePatchContainers(operatorContainers, p.Spec.Containers)
if err != nil {
return nil, errors.Wrap(err, "failed to merge containers spec")
}
// PodManagementPolicy is set to Parallel to mitigate issues in kubernetes: https://github.com/kubernetes/kubernetes/issues/60164
// This is also mentioned as one of limitations of StatefulSets: https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/#limitations
return &appsv1.StatefulSetSpec{
ServiceName: governingServiceName,
Replicas: p.Spec.Replicas,
PodManagementPolicy: appsv1.ParallelPodManagement,
UpdateStrategy: appsv1.StatefulSetUpdateStrategy{
Type: appsv1.RollingUpdateStatefulSetStrategyType,
},
MinReadySeconds: minReadySeconds,
Selector: &metav1.LabelSelector{
MatchLabels: finalSelectorLabels,
},
Template: v1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: finalLabels,
Annotations: podAnnotations,
},
Spec: v1.PodSpec{
Containers: containers,
InitContainers: initContainers,