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 namespace
  kubernetes.core.k8s:
    state: present
    definition:
      apiVersion: v1
      kind: Namespace
      metadata:
        name: monitoring

- 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: Create CRDs for Prometheus Operator
  kubernetes.core.k8s:
    state: present
    definition: "{{ lookup('ansible.builtin.url', 'https://raw.githubusercontent.com/prometheus-operator/prometheus-operator/v0.57.0/example/prometheus-operator-crd/monitoring.coreos.com_' ~ item ~ '.yaml', split_lines=false) | regex_replace('- =$', '- \"=\"', multiline=True) | from_yaml_all }}" # yamllint disable-line rule:line-length
    apply: true
    server_side_apply:
      field_manager: Atmosphere
      force_conflicts: true
  loop:
    - alertmanagerconfigs
    - alertmanagers
    - podmonitors
    - probes
    - prometheuses
    - prometheusrules
    - servicemonitors
    - thanosrulers
  # NOTE(mnaser): We replace `- =` with `- "="` to avoid a YAML error, this also
  #               breaks idempotency so we flip to `changed_when: false`.
  #               See: https://github.com/yaml/pyyaml/issues/619
  changed_when: false

- name: Deploy Helm chart
  kubernetes.core.helm:
    name: kube-prometheus-stack
    chart_ref: prometheus-community/kube-prometheus-stack
    chart_version: 36.2.0
    release_namespace: monitoring
    kubeconfig: /etc/kubernetes/admin.conf
    values: "{{ _kube_prometheus_stack_values | combine(kube_prometheus_stack_values, recursive=True) }}"
    wait: true