Finished lb and db

Signed-off-by: Tuan-Dat Tran <tuan-dat.tran@tudattr.dev>

roles/postgres/handlers/main.yml

@@ -0,0 +1,6 @@
+---
+- name: Restart postgres
+  systemd:
+    name: postgres
+    state: restarted
+  become: true

roles/postgres/tasks/ansible_deps.yml

@@ -0,0 +1,10 @@
+---
+- name: Update apt cache
+  apt:
+    update_cache: yes
+  become: true
+
+- name: Install ansible dependencies
+  apt:
+    name: "{{ ansible_dependencies }}"
+  become: true

roles/postgres/tasks/configuration.yml

@@ -0,0 +1,49 @@
+---
+- name: "Create postgres user: {{ db.user }}"
+  community.postgresql.postgresql_user:
+    state: present
+    name: "{{ db.user }}"
+    password: "{{ db.password }}"
+  become: true
+  become_user: "{{ db.default_user.user }}"
+  vars:
+    ansible_remote_temp: "/tmp/"
+
+- name: "Create database: {{ db.name }}"
+  community.postgresql.postgresql_db:
+    state: present
+    name: "{{ db.name }}"
+    encoding: UTF8
+    lc_collate: "en_US.UTF-8"
+    lc_ctype: "en_US.UTF-8"
+  become: yes
+  become_user: postgres
+  vars:
+    ansible_remote_temp: "/tmp/"
+
+- name: "Grant {{ db.user }} user access to db {{ db.name }}"
+  postgresql_privs:
+    type: database
+    database: "{{ db.name }}"
+    roles: "{{ db.user }}"
+    grant_option: no
+    privs: all
+  become: yes
+  become_user: postgres
+  vars:
+    ansible_remote_temp: "/tmp/"
+
+- name: "Allow md5 connection for the {{ db.user }} user"
+  postgresql_pg_hba:
+    dest: "~/15/main/pg_hba.conf"
+    contype: host
+    databases: all
+    method: md5
+    users: "{{ db.user }}"
+    create: true
+  become: yes
+  become_user: postgres
+  notify:
+    - Restart postgres
+  vars:
+    ansible_remote_temp: "/tmp/"

roles/postgres/tasks/installation.yml

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+---
+- name: Install postgres
+  apt:
+    name: "{{ postgres_packages }}"
+    state: present
+  become: true
+  register: postgres_install
+
+- name: Start and enable the service
+  systemd:
+    name: postgresql
+    state: started
+    enabled: true
+  become: true

roles/postgres/tasks/main.yml

@@ -0,0 +1,4 @@
+---
+- include_tasks: ansible_deps.yml
+- include_tasks: installation.yml
+- include_tasks: configuration.yml

roles/postgres/vars/main.yml

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+############################################
+############### CHANGE THESE ###############
+############################################
+db:
+  default_user:
+    user: "postgres"
+  name: "database"
+  user: "user"
+  password: "password"
+
+############################################
+# Don't change these (probably)
+ansible_dependencies:
+  - python3-pip
+  - python3-psycopg
+  - python3-pexpect
+  - acl
+
+postgres_packages:
+  - postgresql
+  - postgresql-client