Remove prometheus operator from Kubespray (#2658)

Kubespray should not install any helm charts. This is a task
that a user should do on his/her own through ansible or another
tool. It opens the door to wrapping installation of any helm
chart.

inventory/sample/group_vars/k8s-cluster.yml

@@ -162,15 +162,9 @@ dashboard_enabled: true
 # Monitoring apps for k8s
 efk_enabled: false
 
-# Helm deployment. Needs for Prometheus Operator, k8s metrics.
+# Helm deployment
 helm_enabled: false
 
-# Prometheus Operator. Needs for k8s metrics. Installed Helm is required.
-prometheus_operator_enabled: false
-
-# K8s cluster metrics. Installed Helm and Prometheus Operator are required.
-k8s_metrics_enabled: false
-
 # Istio deployment
 istio_enabled: false
 

roles/kubernetes-apps/meta/main.yml

@@ -27,12 +27,6 @@ dependencies:
       - apps
       - registry
 
-  - role: kubernetes-apps/metrics
-    when: prometheus_operator_enabled
-    tags:
-      - apps
-      - metrics
-
   # istio role should be last because it takes a long time to initialize and
   # will cause timeouts trying to start other addons.
   - role: kubernetes-apps/istio

roles/kubernetes-apps/metrics/defaults/main.yml

----
-# Prometheus Operator. Needs for k8s metrics. Installed Helm is required.
-prometheus_operator_enabled: false
-
-# K8s cluster metrics. Installed Helm and Prometheus Operators are required.
-k8s_metrics_enabled: false
-
-# Separate namespace for monitoring/metrics
-monitoring_namespace: "monitoring"

roles/kubernetes-apps/metrics/tasks/main.yml

----
-- name: Metrics | Make sure Helm is installed
-  command: "{{ bin_dir }}/helm version"
-  register: helm_ready_result
-  until: helm_ready_result|succeeded
-  retries: 4
-  delay: 5
-  when:
-    - prometheus_operator_enabled
-    - inventory_hostname == groups['kube-master'][0]
-
-- name: Metrics | Add coreos repo
-  command: "{{ bin_dir }}/helm repo add coreos https://s3-eu-west-1.amazonaws.com/coreos-charts/stable/"
-  when:
-    - prometheus_operator_enabled
-    - inventory_hostname == groups['kube-master'][0]
-  run_once: true
-
-- name: Metrics | Install Prometheus Operator
-  command: "{{ bin_dir }}/helm upgrade --install prometheus-operator coreos/prometheus-operator --namespace {{ monitoring_namespace }}"
-  when:
-    - prometheus_operator_enabled
-    - inventory_hostname == groups['kube-master'][0]
-  run_once: true
-
-- name: Metrics | Install K8s cluster metrics
-  command: "{{ bin_dir }}/helm upgrade --install kube-prometheus     coreos/kube-prometheus     --namespace {{ monitoring_namespace }}"
-  when:
-    - prometheus_operator_enabled
-    - k8s_metrics_enabled
-    - inventory_hostname == groups['kube-master'][0]
-  run_once: true

tests/files/gce_centos7-flannel-addons.yml

@@ -16,7 +16,5 @@ deploy_netchecker: true
 kubedns_min_replicas: 1
 cloud_provider: gce
 kube_encrypt_secret_data: true
-prometheus_operator_enabled: true
-k8s_metrics_enabled: true
 ingress_nginx_enabled: true
 cert_manager_enabled: true