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Create ServiceMonitor for operator metrics programmatically (#3371)
* Create ServiceMonitor for operator metrics programmatically Signed-off-by: Israel Blancas <[email protected]> * Apply changes requested in CR Signed-off-by: Israel Blancas <[email protected]> * Apply changes requested in CR Signed-off-by: Israel Blancas <[email protected]> --------- Signed-off-by: Israel Blancas <[email protected]>
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| # One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix' | ||
| change_type: enhancement | ||
|
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| # The name of the component, or a single word describing the area of concern, (e.g. collector, target allocator, auto-instrumentation, opamp, github action) | ||
| component: operator | ||
|
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| # A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`). | ||
| note: Programmatically create the `ServiceMonitor` for the operator metrics endpoint, ensuring correct namespace handling and dynamic configuration. | ||
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| # One or more tracking issues related to the change | ||
| issues: [3370] | ||
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| # (Optional) One or more lines of additional information to render under the primary note. | ||
| # These lines will be padded with 2 spaces and then inserted directly into the document. | ||
| # Use pipe (|) for multiline entries. | ||
| subtext: | | ||
| Previously, the `ServiceMonitor` was created statically from a manifest file, causing failures when the | ||
| operator was deployed in a non-default namespace. This enhancement ensures automatic adjustment of the | ||
| `serverName` and seamless metrics scraping. |
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2 changes: 2 additions & 0 deletions
2
...shift/manifests/opentelemetry-operator-controller-manager-metrics-service_v1_service.yaml
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24 changes: 24 additions & 0 deletions
24
...ests/opentelemetry-operator-prometheus-rules_monitoring.coreos.com_v1_prometheusrule.yaml
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| apiVersion: monitoring.coreos.com/v1 | ||
| kind: PrometheusRule | ||
| metadata: | ||
| labels: | ||
| app.kubernetes.io/managed-by: operator-lifecycle-manager | ||
| app.kubernetes.io/name: opentelemetry-operator | ||
| app.kubernetes.io/part-of: opentelemetry-operator | ||
| name: opentelemetry-operator-prometheus-rules | ||
| spec: | ||
| groups: | ||
| - name: opentelemetry-operator-monitoring.rules | ||
| rules: | ||
| - expr: sum by (type) (opentelemetry_collector_receivers) | ||
| record: type:opentelemetry_collector_receivers:sum | ||
| - expr: sum by (type) (opentelemetry_collector_exporters) | ||
| record: type:opentelemetry_collector_exporters:sum | ||
| - expr: sum by (type) (opentelemetry_collector_processors) | ||
| record: type:opentelemetry_collector_processors:sum | ||
| - expr: sum by (type) (opentelemetry_collector_extensions) | ||
| record: type:opentelemetry_collector_extensions:sum | ||
| - expr: sum by (type) (opentelemetry_collector_connectors) | ||
| record: type:opentelemetry_collector_connectors:sum | ||
| - expr: sum by (type) (opentelemetry_collector_info) | ||
| record: type:opentelemetry_collector_info:sum |
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15
...nshift/manifests/opentelemetry-operator-prometheus_rbac.authorization.k8s.io_v1_role.yaml
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| apiVersion: rbac.authorization.k8s.io/v1 | ||
| kind: Role | ||
| metadata: | ||
| name: opentelemetry-operator-prometheus | ||
| rules: | ||
| - apiGroups: | ||
| - "" | ||
| resources: | ||
| - services | ||
| - endpoints | ||
| - pods | ||
| verbs: | ||
| - get | ||
| - list | ||
| - watch |
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...manifests/opentelemetry-operator-prometheus_rbac.authorization.k8s.io_v1_rolebinding.yaml
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| apiVersion: rbac.authorization.k8s.io/v1 | ||
| kind: RoleBinding | ||
| metadata: | ||
| name: opentelemetry-operator-prometheus | ||
| roleRef: | ||
| apiGroup: rbac.authorization.k8s.io | ||
| kind: Role | ||
| name: opentelemetry-operator-prometheus | ||
| subjects: | ||
| - kind: ServiceAccount | ||
| name: prometheus-k8s | ||
| namespace: openshift-monitoring |
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29 changes: 29 additions & 0 deletions
29
config/overlays/openshift/manager_auth_proxy_tls_patch.yaml
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| apiVersion: apps/v1 | ||
| kind: Deployment | ||
| metadata: | ||
| name: controller-manager | ||
| namespace: system | ||
| spec: | ||
| template: | ||
| spec: | ||
| containers: | ||
| - name: manager # without this line, kustomize reorders the containers, making kube-rbac-proxy the default container | ||
| - name: kube-rbac-proxy | ||
| args: | ||
| - "--secure-listen-address=0.0.0.0:8443" | ||
| - "--upstream=http://127.0.0.1:8080/" | ||
| - "--logtostderr=true" | ||
| - "--v=0" | ||
| - "--tls-cert-file=/var/run/tls/server/tls.crt" | ||
| - "--tls-private-key-file=/var/run/tls/server/tls.key" | ||
| - "--tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_128_CBC_SHA256" | ||
| - "--tls-min-version=VersionTLS12" | ||
| volumeMounts: | ||
| - mountPath: /var/run/tls/server | ||
| name: opentelemetry-operator-metrics-cert | ||
| volumes: | ||
| - name: opentelemetry-operator-metrics-cert | ||
| secret: | ||
| defaultMode: 420 | ||
| # secret generated by the 'service.beta.openshift.io/serving-cert-secret-name' annotation on the metrics-service | ||
| secretName: opentelemetry-operator-metrics |
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| apiVersion: v1 | ||
| kind: Service | ||
| metadata: | ||
| annotations: | ||
| service.beta.openshift.io/serving-cert-secret-name: opentelemetry-operator-metrics | ||
| name: controller-manager-metrics-service | ||
| namespace: system |
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| // Copyright The OpenTelemetry 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. | ||
|
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| package operatormetrics | ||
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| import ( | ||
| "context" | ||
| "fmt" | ||
| "os" | ||
|
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| monitoringv1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1" | ||
| corev1 "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/runtime" | ||
| "k8s.io/apimachinery/pkg/util/intstr" | ||
| "k8s.io/client-go/rest" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| "sigs.k8s.io/controller-runtime/pkg/manager" | ||
| ) | ||
|
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| var ( | ||
| // namespaceFile is the path to the namespace file for the service account. | ||
| namespaceFile = "/var/run/secrets/kubernetes.io/serviceaccount/namespace" | ||
|
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| // caBundleConfigMap declares the name of the config map for the CA bundle. | ||
| caBundleConfigMap = "serving-certs-ca-bundle" | ||
|
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| // prometheusCAFile declares the path for prometheus CA file for service monitors in OpenShift. | ||
| prometheusCAFile = fmt.Sprintf("/etc/prometheus/configmaps/%s/service-ca.crt", caBundleConfigMap) | ||
|
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| // nolint #nosec | ||
| // bearerTokenFile declares the path for bearer token file for service monitors. | ||
| bearerTokenFile = "/var/run/secrets/kubernetes.io/serviceaccount/token" | ||
|
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| // openshiftInClusterMonitoringNamespace declares the namespace for the OpenShift in-cluster monitoring. | ||
| openshiftInClusterMonitoringNamespace = "openshift-monitoring" | ||
| ) | ||
|
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| var _ manager.Runnable = &OperatorMetrics{} | ||
|
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| type OperatorMetrics struct { | ||
| kubeClient client.Client | ||
| } | ||
|
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| func NewOperatorMetrics(config *rest.Config, scheme *runtime.Scheme) (OperatorMetrics, error) { | ||
| kubeClient, err := client.New(config, client.Options{Scheme: scheme}) | ||
| if err != nil { | ||
| return OperatorMetrics{}, err | ||
| } | ||
|
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| return OperatorMetrics{ | ||
| kubeClient: kubeClient, | ||
| }, nil | ||
| } | ||
|
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| func (om OperatorMetrics) Start(ctx context.Context) error { | ||
| rawNamespace, err := os.ReadFile(namespaceFile) | ||
| if err != nil { | ||
| return fmt.Errorf("error reading namespace file: %w", err) | ||
| } | ||
| namespace := string(rawNamespace) | ||
|
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| var tlsConfig *monitoringv1.TLSConfig | ||
|
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| if om.caConfigMapExists() { | ||
| serviceName := fmt.Sprintf("opentelemetry-operator-controller-manager-metrics-service.%s.svc", namespace) | ||
|
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| tlsConfig = &monitoringv1.TLSConfig{ | ||
| CAFile: prometheusCAFile, | ||
| SafeTLSConfig: monitoringv1.SafeTLSConfig{ | ||
| ServerName: &serviceName, | ||
| }, | ||
| } | ||
| } else { | ||
| t := true | ||
| tlsConfig = &monitoringv1.TLSConfig{ | ||
| SafeTLSConfig: monitoringv1.SafeTLSConfig{ | ||
| // kube-rbac-proxy uses a self-signed cert by default | ||
| InsecureSkipVerify: &t, | ||
| }, | ||
| } | ||
| } | ||
|
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| sm := monitoringv1.ServiceMonitor{ | ||
| ObjectMeta: metav1.ObjectMeta{ | ||
| Name: "opentelemetry-operator-metrics-monitor", | ||
| Namespace: namespace, | ||
| Labels: map[string]string{ | ||
| "app.kubernetes.io/name": "opentelemetry-operator", | ||
| "app.kubernetes.io/part-of": "opentelemetry-operator", | ||
| "control-plane": "controller-manager", | ||
| }, | ||
| }, | ||
| Spec: monitoringv1.ServiceMonitorSpec{ | ||
| Selector: metav1.LabelSelector{ | ||
| MatchLabels: map[string]string{ | ||
| "app.kubernetes.io/name": "opentelemetry-operator", | ||
| }, | ||
| }, | ||
| Endpoints: []monitoringv1.Endpoint{ | ||
| { | ||
| BearerTokenFile: bearerTokenFile, | ||
| Interval: "30s", | ||
| Path: "/metrics", | ||
| Scheme: "https", | ||
| ScrapeTimeout: "10s", | ||
| TargetPort: &intstr.IntOrString{IntVal: 8443}, | ||
| TLSConfig: tlsConfig, | ||
| }, | ||
| }, | ||
| }, | ||
| } | ||
|
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| err = om.kubeClient.Create(ctx, &sm) | ||
| if err != nil { | ||
| return fmt.Errorf("error creating service monitor: %w", err) | ||
| } | ||
|
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| <-ctx.Done() | ||
|
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| return om.kubeClient.Delete(ctx, &sm) | ||
| } | ||
|
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| func (om OperatorMetrics) NeedLeaderElection() bool { | ||
| return true | ||
| } | ||
|
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| func (om OperatorMetrics) caConfigMapExists() bool { | ||
| return om.kubeClient.Get(context.Background(), client.ObjectKey{ | ||
| Name: caBundleConfigMap, | ||
| Namespace: openshiftInClusterMonitoringNamespace, | ||
| }, &corev1.ConfigMap{}, | ||
| ) == nil | ||
| } |
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