roles/kube_prometheus_stack/tasks/main.yml

# Copyright (c) 2022 VEXXHOST, Inc.
#
# 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.

- name: Retrieve "etcd" CA certificate
  ansible.builtin.slurp:
    src: /etc/kubernetes/pki/etcd/ca.crt
  register: _etcd_ca_crt

- name: Retrieve "etcd" client certificate
  ansible.builtin.slurp:
    src: /etc/kubernetes/pki/etcd/healthcheck-client.crt
  register: _etcd_healthcheck_client_crt

- name: Retrieve "etcd" client key
  ansible.builtin.slurp:
    src: /etc/kubernetes/pki/etcd/healthcheck-client.key
  register: _etcd_healthcheck_client_key

- name: Create Secret with "etcd" TLS certificates
  kubernetes.core.k8s:
    state: present
    definition:
      apiVersion: v1
      kind: Secret
      metadata:
        name: kube-prometheus-stack-etcd-client-cert
        namespace: monitoring
      data:
        ca.crt: "{{ _etcd_ca_crt.content }}"
        healthcheck-client.crt: "{{ _etcd_healthcheck_client_crt.content }}"
        healthcheck-client.key: "{{ _etcd_healthcheck_client_key.content }}"

- name: Uninstall the legacy HelmRelease
  run_once: true
  block:
    - name: Suspend the existing HelmRelease
      failed_when: false
      kubernetes.core.k8s:
        state: patched
        api_version: helm.toolkit.fluxcd.io/v2beta1
        kind: HelmRelease
        name: "{{ kube_prometheus_stack_helm_release_name }}"
        namespace: "{{ kube_prometheus_stack_helm_release_namespace }}"
        definition:
          spec:
            suspend: true

    - name: Remove the existing HelmRelease
      failed_when: false
      kubernetes.core.k8s:
        state: absent
        api_version: helm.toolkit.fluxcd.io/v2beta1
        kind: HelmRelease
        name: "{{ kube_prometheus_stack_helm_release_name }}"
        namespace: "{{ kube_prometheus_stack_helm_release_namespace }}"

- name: Deploy Helm chart
  run_once: true
  kubernetes.core.helm:
    name: "{{ kube_prometheus_stack_helm_release_name }}"
    chart_ref: "{{ kube_prometheus_stack_helm_chart_ref }}"
    release_namespace: "{{ kube_prometheus_stack_helm_release_namespace }}"
    create_namespace: true
    kubeconfig: /etc/kubernetes/admin.conf
    values: "{{ _kube_prometheus_stack_helm_values | combine(kube_prometheus_stack_helm_values, recursive=True) }}"