---
# Ensures Grafana is deployed and connected to UWM Prometheus data source.
- name: See if the Grafana project is there.
  kubernetes.core.k8s_info:
    kubeconfig: tmp/kubeconfig-ocp4
    validate_certs: no
    api_version: v1
    kind: namespace
    name: grafana
  register: grafana_ns

- name: Fail if not so.
  ansible.builtin.assert:
    that:
      - grafana_ns.resources is defined
      - grafana_ns.resources | length == 1
    success_msg: "OK, grafana namespace found."
    fail_msg: "FATAL: grafana namespace is missing. Ensure the operator is deployed before proceeding."

- name: See if the Grafana CSV is there as well.
  kubernetes.core.k8s_info:
    kubeconfig: tmp/kubeconfig-ocp4
    validate_certs: no
    api_version: operators.coreos.com/v1alpha1
    kind: clusterserviceversion
    namespace: grafana
    label_selectors:
      - operators.coreos.com/grafana-operator.grafana=
  register: grafana_csv

- name: Fail if not so.
  ansible.builtin.assert:
    that:
      - grafana_csv.resources is defined
      - grafana_csv.resources | length > 0
    success_msg: "OK, grafana CSV found."
    fail_msg: "FATAL: grafana CSV is missing. Ensure the operator is deployed before proceeding."

# https://github.com/rh-mobb/helm-charts/blob/main/charts/grafana-cr/templates/grafana.yaml
# https://rhthsa.github.io/openshift-demo/application-metrics.html
# https://rhthsa.github.io/openshift-demo/manifests/frontend-v1-and-backend-v1-JVM.yaml
- name: Ensure a Grafana instance is there.
  kubernetes.core.k8s:
    kubeconfig: tmp/kubeconfig-ocp4
    validate_certs: no
    api_version: grafana.integreatly.org/v1beta1
    kind: grafana
    namespace: grafana
    name: dashboards
    resource_definition:
      metadata:
        labels:
          dashboards: dashboards
      spec:
        route:
          spec:
            host: dashboards-grafana.apps.ocp4.example.com
            port:
              targetPort: 3000
            tls:
              termination: edge
            to:
              kind: Service
              name: dashboards-service
              weight: 100
            wildcardPolicy: None

- name: Give the service account permission to collect metrics.
  kubernetes.core.k8s:
    kubeconfig: tmp/kubeconfig-ocp4
    validate_certs: no
    api_version: rbac.authorization.k8s.io/v1
    kind: clusterrolebinding
    name: grafana-dashboards-sa
    resource_definition:
      roleRef:
        apiGroup: rbac.authorization.k8s.io
        kind: ClusterRole
        name: cluster-monitoring-view
      subjects:
      - kind: ServiceAccount
        name: dashboards-sa
        namespace: grafana

- name: Ensure there is a token secret.
  kubernetes.core.k8s:
    kubeconfig: tmp/kubeconfig-ocp4
    validate_certs: no
    api_version: v1
    kind: secret
    namespace: grafana
    name: dashboards-sa-token
    resource_definition:
      type: kubernetes.io/service-account-token
      metadata:
        annotations:
          kubernetes.io/service-account.name: dashboards-sa

- name: Obtain the token from the secret.
  kubernetes.core.k8s_info:
    kubeconfig: tmp/kubeconfig-ocp4
    validate_certs: no
    api_version: v1
    kind: secret
    namespace: grafana
    name: dashboards-sa-token
  register: sa_token_secret

- name: Register the token as a fact (grafana_token).
  ansible.builtin.set_fact:
    grafana_token: "{{ sa_token_secret.resources[0].data.token | b64decode }}"

- name: Ensure a GrafanaDataSource is defined.
  kubernetes.core.k8s:
    kubeconfig: tmp/kubeconfig-ocp4
    validate_certs: no
    api_version: grafana.integreatly.org/v1beta1
    kind: grafanadatasource
    namespace: grafana
    name: user-workload-monitoring
    resource_definition:
      spec:
        instanceSelector:
          matchLabels:
            dashboards: dashboards
        datasource:
          name: UserMetrics
          type: prometheus
          url: 'https://thanos-querier.openshift-monitoring.svc:9091'
          access: proxy
          editable: false
          isDefault: true
          jsonData:
            httpHeaderName1: 'Authorization'
            timeInterval: 5s
            tlsSkipVerify: true
          secureJsonData:
            httpHeaderValue1: 'Bearer {{grafana_token}}'

...