[ANSIBLE] Generate helm values file for kube-prometheus stack

Default values file is provided and any of it's contents can be
overriden by setting relevant keys in 'kube_prometheus_helm_values'
dict on provisioner run time.

Change-Id: I1655d64704e1ad6e9cd9650622ae1a92de902a8f
Issue-ID: INT-1926
Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>

diff --git a/ansible/roles/kube-prometheus-stack/defaults/main.yml b/ansible/roles/kube-prometheus-stack/defaults/main.yml
index e9bcc6a..f84fd0a 100644 (file)
--- a/ansible/roles/kube-prometheus-stack/defaults/main.yml
+++ b/ansible/roles/kube-prometheus-stack/defaults/main.yml
@@ -3,3 +3,20 @@ kube_prometheus_stack:
   k8s_namespace: kube-prometheus
   helm_release_name: kube-prometheus-stack
   helm_timeout: "60s"
+  helm_values_file: "{{ app_data_path }}/kube_prometheus_values.yaml"
+  helm_values:
+    grafana:
+      adminPassword: admin
+    prometheus:
+      prometheusSpec:
+        scrapeInterval: 60s
+        storageSpec:
+          disableMountSubPath: true
+          volumeClaimTemplate:
+            spec:
+              storageClassName: kube-prometheus
+              accessModes: ["ReadWriteOnce"]
+              resources:
+                requests:
+                  storage: 6Gi
+            selector: {}

diff --git a/ansible/roles/kube-prometheus-stack/tasks/main.yml b/ansible/roles/kube-prometheus-stack/tasks/main.yml
index b7f314e..596e4b5 100644 (file)
--- a/ansible/roles/kube-prometheus-stack/tasks/main.yml
+++ b/ansible/roles/kube-prometheus-stack/tasks/main.yml
@@ -5,12 +5,18 @@
   register: kube_prometheus_package_stat
   failed_when: not kube_prometheus_package_stat.stat.exists
 
+- name: Generate helm values file
+  copy:
+    dest: "{{ kube_prometheus_stack.helm_values_file }}"
+    content: "{{ kube_prometheus_stack.helm_values | combine(kube_prometheus_helm_values | default({}), recursive=True) | to_nice_yaml }}"
+
 - name: "Install Helm release {{ kube_prometheus_stack.helm_release_name }}"
   community.kubernetes.helm:
     release_name: "{{ kube_prometheus_stack.helm_release_name }}"
     release_namespace: "{{ kube_prometheus_stack.k8s_namespace }}"
     create_namespace: True
     chart_ref: "{{ app_data_path }}/downloads/kube-prometheus-stack-{{ kube_prometheus_stack_version }}.tgz"
+    values_files: "{{ kube_prometheus_stack.helm_values_file }}"
     wait: True
     wait_timeout: "{{ kube_prometheus_stack.helm_timeout }}"
   tags: molecule-notest