fix(operator): Use safe bearer token authentication to scrape operator metrics (#12164)

operator/CHANGELOG.md

@@ -1,5 +1,6 @@
 ## Main
 
+- [12164](https://github.com/grafana/loki/pull/12164) **periklis**: Use safe bearer token authentication to scrape operator metrics
 - [12216](https://github.com/grafana/loki/pull/12216) **xperimental**: Fix duplicate operator metrics due to ServiceMonitor selector
 - [12212](https://github.com/grafana/loki/pull/12212) **xperimental**: Keep credentialMode in status when updating schemas
 - [12165](https://github.com/grafana/loki/pull/12165) **JoaoBraveCoding**: Change attribute value used for CCO-based credential mode

operator/bundle/community-openshift/manifests/loki-operator-controller-manager-metrics-reader_v1_serviceaccount.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  creationTimestamp: null
+  labels:
+    app.kubernetes.io/instance: loki-operator-v0.5.0
+    app.kubernetes.io/managed-by: operator-lifecycle-manager
+    app.kubernetes.io/name: loki-operator
+    app.kubernetes.io/part-of: loki-operator
+    app.kubernetes.io/version: 0.5.0
+  name: loki-operator-controller-manager-metrics-reader

operator/bundle/community-openshift/manifests/loki-operator-controller-manager-metrics-token_v1_secret.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  annotations:
+    kubernetes.io/service-account.name: loki-operator-controller-manager-metrics-reader
+  labels:
+    app.kubernetes.io/instance: loki-operator-v0.5.0
+    app.kubernetes.io/managed-by: operator-lifecycle-manager
+    app.kubernetes.io/name: loki-operator
+    app.kubernetes.io/part-of: loki-operator
+    app.kubernetes.io/version: 0.5.0
+  name: loki-operator-controller-manager-metrics-token
+type: kubernetes.io/service-account-token

operator/bundle/community-openshift/manifests/loki-operator-controller-manager-read-metrics_rbac.authorization.k8s.io_v1_clusterrolebinding.yaml

@@ -0,0 +1,19 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  creationTimestamp: null
+  labels:
+    app.kubernetes.io/instance: loki-operator-v0.5.0
+    app.kubernetes.io/managed-by: operator-lifecycle-manager
+    app.kubernetes.io/name: loki-operator
+    app.kubernetes.io/part-of: loki-operator
+    app.kubernetes.io/version: 0.5.0
+  name: loki-operator-controller-manager-read-metrics
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: loki-operator-metrics-reader
+subjects:
+- kind: ServiceAccount
+  name: loki-operator-controller-manager-metrics-reader
+  namespace: kubernetes-operators

operator/bundle/community-openshift/manifests/loki-operator-metrics-monitor_monitoring.coreos.com_v1_servicemonitor.yaml

@@ -11,14 +11,21 @@ metadata:
   name: loki-operator-metrics-monitor
 spec:
   endpoints:
-  - bearerTokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
+  - authorization:
+      credentials:
+        key: token
+        name: loki-operator-controller-manager-metrics-token
+      type: bearer
     interval: 30s
     path: /metrics
     scheme: https
     scrapeTimeout: 10s
     targetPort: 8443
     tlsConfig:
-      caFile: /etc/prometheus/configmaps/serving-certs-ca-bundle/service-ca.crt
+      ca:
+        secret:
+          key: service-ca.crt
+          name: loki-operator-controller-manager-metrics-token
       serverName: loki-operator-controller-manager-metrics-service.kubernetes-operators.svc
   selector:
     matchLabels:

operator/bundle/community-openshift/manifests/loki-operator.clusterserviceversion.yaml

@@ -1678,7 +1678,7 @@ spec:
           - subjectaccessreviews
           verbs:
           - create
-        serviceAccountName: default
+        serviceAccountName: loki-operator-controller-manager
       deployments:
       - label:
           app.kubernetes.io/instance: loki-operator-v0.5.0
@@ -1779,6 +1779,7 @@ spec:
                 runAsNonRoot: true
                 seccompProfile:
                   type: RuntimeDefault
+              serviceAccountName: loki-operator-controller-manager
               terminationGracePeriodSeconds: 10
               volumes:
               - configMap:
@@ -1812,7 +1813,7 @@ spec:
           verbs:
           - create
           - patch
-        serviceAccountName: default
+        serviceAccountName: loki-operator-controller-manager
     strategy: deployment
   installModes:
   - supported: false

operator/bundle/community/manifests/loki-operator-controller-manager-metrics-reader_v1_serviceaccount.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  creationTimestamp: null
+  labels:
+    app.kubernetes.io/instance: loki-operator-v0.5.0
+    app.kubernetes.io/managed-by: operator-lifecycle-manager
+    app.kubernetes.io/name: loki-operator
+    app.kubernetes.io/part-of: loki-operator
+    app.kubernetes.io/version: 0.5.0
+  name: loki-operator-controller-manager-metrics-reader

operator/bundle/community/manifests/loki-operator-controller-manager-read-metrics_rbac.authorization.k8s.io_v1_clusterrolebinding.yaml

@@ -0,0 +1,19 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  creationTimestamp: null
+  labels:
+    app.kubernetes.io/instance: loki-operator-v0.5.0
+    app.kubernetes.io/managed-by: operator-lifecycle-manager
+    app.kubernetes.io/name: loki-operator
+    app.kubernetes.io/part-of: loki-operator
+    app.kubernetes.io/version: 0.5.0
+  name: loki-operator-controller-manager-read-metrics
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: loki-operator-metrics-reader
+subjects:
+- kind: ServiceAccount
+  name: loki-operator-controller-manager-metrics-reader
+  namespace: loki-operator

operator/bundle/community/manifests/loki-operator.clusterserviceversion.yaml

@@ -1658,7 +1658,7 @@ spec:
           - subjectaccessreviews
           verbs:
           - create
-        serviceAccountName: default
+        serviceAccountName: loki-operator-controller-manager
       deployments:
       - label:
           app.kubernetes.io/instance: loki-operator-v0.5.0
@@ -1748,6 +1748,7 @@ spec:
                 kubernetes.io/os: linux
               securityContext:
                 runAsNonRoot: true
+              serviceAccountName: loki-operator-controller-manager
               terminationGracePeriodSeconds: 10
               volumes:
               - name: webhook-cert
@@ -1780,7 +1781,7 @@ spec:
           verbs:
           - create
           - patch
-        serviceAccountName: default
+        serviceAccountName: loki-operator-controller-manager
     strategy: deployment
   installModes:
   - supported: false

operator/bundle/openshift/manifests/loki-operator-controller-manager-metrics-reader_v1_serviceaccount.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  creationTimestamp: null
+  labels:
+    app.kubernetes.io/instance: loki-operator-0.1.0
+    app.kubernetes.io/managed-by: operator-lifecycle-manager
+    app.kubernetes.io/name: loki-operator
+    app.kubernetes.io/part-of: cluster-logging
+    app.kubernetes.io/version: 0.1.0
+  name: loki-operator-controller-manager-metrics-reader

operator/bundle/openshift/manifests/loki-operator-controller-manager-metrics-token_v1_secret.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  annotations:
+    kubernetes.io/service-account.name: loki-operator-controller-manager-metrics-reader
+  labels:
+    app.kubernetes.io/instance: loki-operator-0.1.0
+    app.kubernetes.io/managed-by: operator-lifecycle-manager
+    app.kubernetes.io/name: loki-operator
+    app.kubernetes.io/part-of: cluster-logging
+    app.kubernetes.io/version: 0.1.0
+  name: loki-operator-controller-manager-metrics-token
+type: kubernetes.io/service-account-token

operator/bundle/openshift/manifests/loki-operator-controller-manager-read-metrics_rbac.authorization.k8s.io_v1_clusterrolebinding.yaml

@@ -0,0 +1,19 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  creationTimestamp: null
+  labels:
+    app.kubernetes.io/instance: loki-operator-0.1.0
+    app.kubernetes.io/managed-by: operator-lifecycle-manager
+    app.kubernetes.io/name: loki-operator
+    app.kubernetes.io/part-of: cluster-logging
+    app.kubernetes.io/version: 0.1.0
+  name: loki-operator-controller-manager-read-metrics
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: loki-operator-metrics-reader
+subjects:
+- kind: ServiceAccount
+  name: loki-operator-controller-manager-metrics-reader
+  namespace: openshift-operators-redhat

operator/bundle/openshift/manifests/loki-operator-metrics-monitor_monitoring.coreos.com_v1_servicemonitor.yaml

@@ -11,14 +11,21 @@ metadata:
   name: loki-operator-metrics-monitor
 spec:
   endpoints:
-  - bearerTokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
+  - authorization:
+      credentials:
+        key: token
+        name: loki-operator-controller-manager-metrics-token
+      type: bearer
     interval: 30s
     path: /metrics
     scheme: https
     scrapeTimeout: 10s
     targetPort: 8443
     tlsConfig:
-      caFile: /etc/prometheus/configmaps/serving-certs-ca-bundle/service-ca.crt
+      ca:
+        secret:
+          key: service-ca.crt
+          name: loki-operator-controller-manager-metrics-token
       serverName: loki-operator-controller-manager-metrics-service.openshift-operators-redhat.svc
   selector:
     matchLabels:

operator/bundle/openshift/manifests/loki-operator.clusterserviceversion.yaml

@@ -1663,7 +1663,7 @@ spec:
           - subjectaccessreviews
           verbs:
           - create
-        serviceAccountName: default
+        serviceAccountName: loki-operator-controller-manager
       deployments:
       - label:
           app.kubernetes.io/instance: loki-operator-0.1.0
@@ -1764,6 +1764,7 @@ spec:
                 runAsNonRoot: true
                 seccompProfile:
                   type: RuntimeDefault
+              serviceAccountName: loki-operator-controller-manager
               terminationGracePeriodSeconds: 10
               volumes:
               - configMap:
@@ -1797,7 +1798,7 @@ spec:
           verbs:
           - create
           - patch
-        serviceAccountName: default
+        serviceAccountName: loki-operator-controller-manager
     strategy: deployment
   installModes:
   - supported: false

operator/config/manager/manager.yaml

@@ -39,4 +39,5 @@ spec:
           periodSeconds: 10
       nodeSelector:
         kubernetes.io/os: linux
+      serviceAccountName: controller-manager
       terminationGracePeriodSeconds: 10

operator/config/overlays/community-openshift/prometheus_service_monitor_patch.yaml

@@ -6,12 +6,19 @@ metadata:
   name: metrics-monitor
 spec:
   endpoints:
-    - bearerTokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
-      path: /metrics
+    - path: /metrics
       targetPort: 8443
       scheme: https
       interval: 30s
       scrapeTimeout: 10s
+      authorization:
+        type: bearer
+        credentials:
+          key: token
+          name: loki-operator-controller-manager-metrics-token
       tlsConfig:
-        caFile: /etc/prometheus/configmaps/serving-certs-ca-bundle/service-ca.crt
+        ca:
+          secret:
+            key: service-ca.crt
+            name: loki-operator-controller-manager-metrics-token
         serverName: loki-operator-controller-manager-metrics-service.kubernetes-operators.svc

operator/config/overlays/openshift/kustomization.yaml

@@ -4,6 +4,7 @@ resources:
 - ../../manager
 - ../../webhook
 - ../../prometheus
+- manager_metrics_secret_token.yaml
 
 # Adds namespace to all resources.
 namespace: openshift-operators-redhat

operator/config/overlays/openshift/manager_metrics_secret_token.yaml

@@ -0,0 +1,7 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: controller-manager-metrics-token
+  annotations:
+    kubernetes.io/service-account.name: loki-operator-controller-manager-metrics-reader
+type: kubernetes.io/service-account-token

operator/config/overlays/openshift/prometheus_service_monitor_patch.yaml

@@ -6,12 +6,19 @@ metadata:
   name: metrics-monitor
 spec:
   endpoints:
-    - bearerTokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
-      path: /metrics
+    - path: /metrics
       targetPort: 8443
       scheme: https
       interval: 30s
       scrapeTimeout: 10s
+      authorization:
+        type: bearer
+        credentials:
+          key: token
+          name: loki-operator-controller-manager-metrics-token
       tlsConfig:
-        caFile: /etc/prometheus/configmaps/serving-certs-ca-bundle/service-ca.crt
+        ca:
+          secret:
+            key: service-ca.crt
+            name: loki-operator-controller-manager-metrics-token
         serverName: loki-operator-controller-manager-metrics-service.openshift-operators-redhat.svc

operator/config/rbac/auth_proxy_client_clusterrolebinding.yaml

@@ -0,0 +1,12 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: controller-manager-read-metrics
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: metrics-reader
+subjects:
+- kind: ServiceAccount
+  name: controller-manager-metrics-reader
+  namespace: system

operator/config/rbac/auth_proxy_client_serviceaccount.yaml

@@ -0,0 +1,5 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: controller-manager-metrics-reader
+  namespace: system

operator/config/rbac/auth_proxy_role_binding.yaml

@@ -8,5 +8,5 @@ roleRef:
   name: proxy-role
 subjects:
 - kind: ServiceAccount
-  name: default
+  name: controller-manager
   namespace: system

operator/config/rbac/kustomization.yaml

@@ -7,5 +7,8 @@ resources:
 - auth_proxy_role.yaml
 - auth_proxy_role_binding.yaml
 - auth_proxy_client_clusterrole.yaml
+- auth_proxy_client_clusterrolebinding.yaml
+- auth_proxy_client_serviceaccount.yaml
 - prometheus_role.yaml
 - prometheus_role_binding.yaml
+- serviceaccount.yaml

operator/config/rbac/leader_election_role_binding.yaml

@@ -8,5 +8,5 @@ roleRef:
   name: leader-election-role
 subjects:
 - kind: ServiceAccount
-  name: default
+  name: controller-manager
   namespace: system

operator/config/rbac/role_binding.yaml

@@ -8,5 +8,5 @@ roleRef:
   name: lokistack-manager
 subjects:
 - kind: ServiceAccount
-  name: default
+  name: controller-manager
   namespace: system

operator/config/rbac/serviceaccount.yaml

@@ -0,0 +1,5 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: controller-manager
+  namespace: system