/
prometheus.go
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/
prometheus.go
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// Copyright 2018 The Cluster Monitoring 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 tasks
import (
"encoding/json"
"github.com/openshift/cluster-monitoring-operator/pkg/client"
"github.com/openshift/cluster-monitoring-operator/pkg/manifests"
"github.com/pkg/errors"
"k8s.io/klog/v2"
)
type PrometheusTask struct {
client *client.Client
factory *manifests.Factory
}
func NewPrometheusTask(client *client.Client, factory *manifests.Factory) *PrometheusTask {
return &PrometheusTask{
client: client,
factory: factory,
}
}
func (t *PrometheusTask) Run() error {
cacm, err := t.factory.PrometheusK8sServingCertsCABundle()
if err != nil {
return errors.Wrap(err, "initializing serving certs CA Bundle ConfigMap failed")
}
_, err = t.client.CreateIfNotExistConfigMap(cacm)
if err != nil {
return errors.Wrap(err, "creating serving certs CA Bundle ConfigMap failed")
}
kscm, err := t.client.GetConfigmap("openshift-config-managed", "kubelet-serving-ca")
if err != nil {
return errors.Wrap(err, "openshift-config-managed/kubelet-serving-ca")
}
cacm, err = t.factory.PrometheusK8sKubeletServingCABundle(kscm.Data)
if err != nil {
return errors.Wrap(err, "initializing kubelet serving CA Bundle ConfigMap failed")
}
err = t.client.CreateOrUpdateConfigMap(cacm)
if err != nil {
return errors.Wrap(err, "creating kubelet serving CA Bundle ConfigMap failed")
}
r, err := t.factory.PrometheusK8sRoute()
if err != nil {
return errors.Wrap(err, "initializing Prometheus Route failed")
}
err = t.client.CreateRouteIfNotExists(r)
if err != nil {
return errors.Wrap(err, "creating Prometheus Route failed")
}
host, err := t.client.WaitForRouteReady(r)
if err != nil {
return errors.Wrap(err, "waiting for Prometheus Route to become ready failed")
}
ps, err := t.factory.PrometheusK8sProxySecret()
if err != nil {
return errors.Wrap(err, "initializing Prometheus proxy Secret failed")
}
err = t.client.CreateIfNotExistSecret(ps)
if err != nil {
return errors.Wrap(err, "creating Prometheus proxy Secret failed")
}
gs, err := t.factory.GrafanaDatasources()
if err != nil {
return errors.Wrap(err, "initializing Grafana Datasources Secret failed")
}
gs, err = t.client.WaitForSecret(gs)
if err != nil {
return errors.Wrap(err, "waiting for Grafana Datasources Secret failed")
}
d := &manifests.GrafanaDatasources{}
err = json.Unmarshal(gs.Data["prometheus.yaml"], d)
if err != nil {
return errors.Wrap(err, "unmarshalling grafana datasource failed")
}
hs, err := t.factory.PrometheusK8sHtpasswdSecret(d.Datasources[0].BasicAuthPassword)
if err != nil {
return errors.Wrap(err, "initializing Prometheus htpasswd Secret failed")
}
err = t.client.CreateIfNotExistSecret(hs)
if err != nil {
return errors.Wrap(err, "creating Prometheus htpasswd Secret failed")
}
rs, err := t.factory.PrometheusRBACProxySecret()
if err != nil {
return errors.Wrap(err, "initializing Prometheus RBAC proxy Secret failed")
}
err = t.client.CreateIfNotExistSecret(rs)
if err != nil {
return errors.Wrap(err, "creating Prometheus RBAC proxy Secret failed")
}
sa, err := t.factory.PrometheusK8sServiceAccount()
if err != nil {
return errors.Wrap(err, "initializing Prometheus ServiceAccount failed")
}
err = t.client.CreateOrUpdateServiceAccount(sa)
if err != nil {
return errors.Wrap(err, "reconciling Prometheus ServiceAccount failed")
}
cr, err := t.factory.PrometheusK8sClusterRole()
if err != nil {
return errors.Wrap(err, "initializing Prometheus ClusterRole failed")
}
err = t.client.CreateOrUpdateClusterRole(cr)
if err != nil {
return errors.Wrap(err, "reconciling Prometheus ClusterRole failed")
}
crb, err := t.factory.PrometheusK8sClusterRoleBinding()
if err != nil {
return errors.Wrap(err, "initializing Prometheus ClusterRoleBinding failed")
}
err = t.client.CreateOrUpdateClusterRoleBinding(crb)
if err != nil {
return errors.Wrap(err, "reconciling Prometheus ClusterRoleBinding failed")
}
rc, err := t.factory.PrometheusK8sRoleConfig()
if err != nil {
return errors.Wrap(err, "initializing Prometheus Role config failed")
}
err = t.client.CreateOrUpdateRole(rc)
if err != nil {
return errors.Wrap(err, "reconciling Prometheus Role config failed")
}
rl, err := t.factory.PrometheusK8sRoleList()
if err != nil {
return errors.Wrap(err, "initializing Prometheus Role failed")
}
for _, r := range rl.Items {
err = t.client.CreateOrUpdateRole(&r)
if err != nil {
return errors.Wrapf(err, "reconciling Prometheus Role %q failed", r.Name)
}
}
rbl, err := t.factory.PrometheusK8sRoleBindingList()
if err != nil {
return errors.Wrap(err, "initializing Prometheus RoleBinding failed")
}
for _, rb := range rbl.Items {
err = t.client.CreateOrUpdateRoleBinding(&rb)
if err != nil {
return errors.Wrapf(err, "reconciling Prometheus RoleBinding %q failed", rb.Name)
}
}
rbc, err := t.factory.PrometheusK8sRoleBindingConfig()
if err != nil {
return errors.Wrap(err, "initializing Prometheus config RoleBinding failed")
}
err = t.client.CreateOrUpdateRoleBinding(rbc)
if err != nil {
return errors.Wrap(err, "reconciling Prometheus config RoleBinding failed")
}
// TODO(paulfantom): Can be removed after OpenShift 4.7 and earlier are no longer supported
err = t.client.DeletePrometheusRuleByNamespaceAndName(t.client.Namespace(), "prometheus-k8s-rules")
if err != nil {
return errors.Wrap(err, "removing old Prometheus rules PrometheusRule failed")
}
pm, err := t.factory.PrometheusK8sPrometheusRule()
if err != nil {
return errors.Wrap(err, "initializing Prometheus rules PrometheusRule failed")
}
err = t.client.CreateOrUpdatePrometheusRule(pm)
if err != nil {
return errors.Wrap(err, "reconciling Prometheus rules PrometheusRule failed")
}
svc, err := t.factory.PrometheusK8sService()
if err != nil {
return errors.Wrap(err, "initializing Prometheus Service failed")
}
err = t.client.CreateOrUpdateService(svc)
if err != nil {
return errors.Wrap(err, "reconciling Prometheus Service failed")
}
svc, err = t.factory.PrometheusK8sServiceThanosSidecar()
if err != nil {
return errors.Wrap(err, "initializing Thanos sidecar Service failed")
}
err = t.client.CreateOrUpdateService(svc)
if err != nil {
return errors.Wrap(err, "reconciling Thanos sidecar Service failed")
}
grpcTLS, err := t.factory.GRPCSecret()
if err != nil {
return errors.Wrap(err, "initializing Prometheus GRPC secret failed")
}
grpcTLS, err = t.client.WaitForSecret(grpcTLS)
if err != nil {
return errors.Wrap(err, "waiting for Prometheus GRPC secret failed")
}
s, err := t.factory.PrometheusK8sGrpcTLSSecret()
if err != nil {
return errors.Wrap(err, "error initializing Prometheus Client GRPC TLS secret")
}
s, err = t.factory.HashSecret(s,
"ca.crt", string(grpcTLS.Data["ca.crt"]),
"server.crt", string(grpcTLS.Data["prometheus-server.crt"]),
"server.key", string(grpcTLS.Data["prometheus-server.key"]),
)
if err != nil {
return errors.Wrap(err, "error hashing Prometheus Client GRPC TLS secret")
}
err = t.client.CreateOrUpdateSecret(s)
if err != nil {
return errors.Wrap(err, "error creating Prometheus Client GRPC TLS secret")
}
err = t.client.DeleteHashedSecret(
s.GetNamespace(),
"prometheus-k8s-grpc-tls",
string(s.Labels["monitoring.openshift.io/hash"]),
)
if err != nil {
return errors.Wrap(err, "error creating Prometheus Client GRPC TLS secret")
}
{
// Create trusted CA bundle ConfigMap.
trustedCA, err := t.factory.PrometheusK8sTrustedCABundle()
if err != nil {
return errors.Wrap(err, "initializing Prometheus CA bundle ConfigMap failed")
}
cbs := &caBundleSyncer{
client: t.client,
factory: t.factory,
prefix: "prometheus",
}
trustedCA, err = cbs.syncTrustedCABundle(trustedCA)
if err != nil {
return errors.Wrap(err, "syncing Prometheus trusted CA bundle ConfigMap failed")
}
secret, err := t.factory.AdditionalAlertManagerConfigs()
if err != nil {
return errors.Wrap(err, "initializing Prometheus additionalAlertManagerConfigs secret failed")
}
if secret != nil {
klog.V(4).Info("initializing Prometheus additionalAlertManagerConfigs secret")
err = t.client.CreateOrUpdateSecret(secret)
if err != nil {
return errors.Wrap(err, "reconciling Prometheus additionalAlertManagerConfigs secret failed")
}
}
klog.V(4).Info("initializing Prometheus object")
p, err := t.factory.PrometheusK8s(host, s, trustedCA)
if err != nil {
return errors.Wrap(err, "initializing Prometheus object failed")
}
klog.V(4).Info("reconciling Prometheus object")
err = t.client.CreateOrUpdatePrometheus(p)
if err != nil {
return errors.Wrap(err, "reconciling Prometheus object failed")
}
klog.V(4).Info("waiting for Prometheus object changes")
err = t.client.WaitForPrometheus(p)
if err != nil {
return errors.Wrap(err, "waiting for Prometheus object changes failed")
}
}
smp, err := t.factory.PrometheusK8sPrometheusServiceMonitor()
if err != nil {
return errors.Wrap(err, "initializing Prometheus Prometheus ServiceMonitor failed")
}
err = t.client.CreateOrUpdateServiceMonitor(smp)
if err != nil {
return errors.Wrap(err, "reconciling Prometheus Prometheus ServiceMonitor failed")
}
smt, err := t.factory.PrometheusK8sThanosSidecarServiceMonitor()
if err != nil {
return errors.Wrap(err, "initializing Prometheus Thanos sidecar ServiceMonitor failed")
}
err = t.client.CreateOrUpdateServiceMonitor(smt)
if err != nil {
return errors.Wrap(err, "reconciling Prometheus Thanos sidecar ServiceMonitor failed")
}
// Clean up the service monitors previously managed by the cluster monitoring operator.
// TODO(bison): Verify these are no longer needed and remove them after 4.8 release.
deprecatedServiceMonitors := []string{
"cluster-version-operator",
"kube-apiserver",
"kube-controller-manager",
"kube-scheduler",
"openshift-apiserver",
"prometheus", // Bug 1952744: Renamed to "prometheus-k8s" in #1044.
}
for _, name := range deprecatedServiceMonitors {
err := t.client.DeleteServiceMonitorByNamespaceAndName(t.client.Namespace(), name)
if err != nil {
return errors.Wrapf(err, "deleting Prometheus %s ServiceMonitor failed", name)
}
}
return nil
}