patroni-postgresql-cluster (#13)

* Описана инфрастуктура кластера

* Добавлена роль etcd

* Добавлена роль haproxy

* Добавлена роль keepalived

* Добавлена роль ntp_install

* Добавлена роль patroni

* Добавлена групповые переменные

---------

Co-authored-by: Fedor Batonogov <f.batonogov@yandex.ru>

ansible/roles/keepalived/defaults/main.yml

@@ -0,0 +1,3 @@
+---
+# defaults file for keepalived
+unit_file: keepalived.master.conf.j2

ansible/roles/keepalived/handlers/main.yml

@@ -0,0 +1,7 @@
+---
+- name: Перезапускаю keepalived.service
+  ansible.builtin.systemd:
+    name: keepalived.service
+    state: restarted
+    enabled: true
+    daemon_reload: true

ansible/roles/keepalived/tasks/config.yml

@@ -0,0 +1,7 @@
+- name: Наливаю конфигурацию keepalived
+  ansible.builtin.template:
+    src: "{{ unit_file }}"
+    dest: /etc/keepalived/keepalived.conf
+    mode: "644"
+  notify:
+    - Перезапускаю keepalived.service

ansible/roles/keepalived/tasks/install.yml

@@ -0,0 +1,7 @@
+---
+- name: Устанавливаю keepalived
+  ansible.builtin.apt:
+    name:
+      - keepalived
+    state: present
+    update_cache: true

ansible/roles/keepalived/tasks/main.yml

@@ -0,0 +1,10 @@
+---
+# tasks file for keepalived
+- name: Устанавливаю keepalived
+  ansible.builtin.import_tasks: install.yml
+
+- name: Наливаю конфигурацию
+  ansible.builtin.include_tasks: config.yml
+
+- name: Запускаю сервис
+  ansible.builtin.include_tasks: start.yml

ansible/roles/keepalived/tasks/start.yml

@@ -0,0 +1,5 @@
+- name: Настраиваю keepalived.service
+  ansible.builtin.systemd:
+    name: keepalived.service
+    state: started
+    enabled: true

ansible/roles/keepalived/templates/keepalived.backup.conf.j2

@@ -0,0 +1,14 @@
+vrrp_instance VI_1 {
+    state BACKUP
+    interface eth0
+    virtual_router_id {{ virtual_router_id }}
+    priority 100                        # PAY ATTENTION ON PRIORITY!!
+    authentication {
+        auth_type PASS
+        auth_pass {{ lookup('password', 'secrets/keepalived/' + virtual_ip + ' length=64') }}
+    }
+
+   virtual_ipaddress {
+       {{ virtual_ip }} dev eth0
+    }
+}

ansible/roles/keepalived/templates/keepalived.master.conf.j2

@@ -0,0 +1,14 @@
+vrrp_instance VI_1 {
+    state MASTER
+    interface eth0
+    virtual_router_id {{ virtual_router_id }}
+    priority 101                        # PAY ATTENTION ON PRIORITY!!
+    authentication {
+        auth_type PASS
+        auth_pass {{ lookup('password', 'secrets/keepalived/' + virtual_ip + ' length=64') }}
+    }
+
+   virtual_ipaddress {
+       {{ virtual_ip }} dev eth0
+    }
+}