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Implemented docker postgres draft
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roles/docker-postgres/README.md
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roles/docker-postgres/README.md
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# Docker-Postgres Ansible Role
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## Overview
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This Ansible role is designed to deploy a PostgreSQL database using Docker. It includes tasks for setting up a Docker network, installing PostgreSQL in a Docker container, and initializing the database with a specified user and database.
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## Role Variables
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- `central_postgres_password`: The password for the PostgreSQL superuser (`postgres`).
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- `database_databasename`: Name of the database to be created.
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- `database_username`: Username for the database user.
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- `database_password`: Password for the database user.
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## Role Tasks
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1. **Create Docker network for PostgreSQL**: Sets up a Docker network for PostgreSQL communication.
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2. **Install PostgreSQL**: Deploys PostgreSQL in a Docker container, attaching it to the created network and setting the superuser password.
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3. **Run the docker_postgres tasks once**: Ensures that the tasks are only run once to avoid redundancy.
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## Handlers
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- **Create database**: Creates a new database with the specified name.
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- **Create database user**: Sets up a user with full privileges on the newly created database.
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## Usage
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1. Set the required variables in your playbook or inventory file.
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2. Include this role in your playbook.
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3. Run the playbook against the target host.
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## Notes
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- The PostgreSQL server is bound to `127.0.0.1:5432` on the host machine, making it accessible only from localhost.
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- Ensure that the provided passwords are secure and stored securely, preferably using Ansible Vault or another encryption method.
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roles/docker-postgres/handlers/main.yml
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roles/docker-postgres/handlers/main.yml
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- name: Create database
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postgresql_db:
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name: "{{ database_databasename }}"
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state: present
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login_user: postgres
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login_password: "{{ central_postgres_password }}"
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login_host: 127.0.0.1
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login_port: 5432
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listen: create database
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- name: Create database user
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postgresql_user:
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name: "{{ database_username }}"
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password: "{{ database_password }}"
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db: "{{ database_databasename }}"
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priv: ALL
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state: present
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login_user: postgres
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login_password: "{{ central_postgres_password }}"
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login_host: 127.0.0.1
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login_port: 5432
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listen: create database
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roles/docker-postgres/tasks/main.yml
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roles/docker-postgres/tasks/main.yml
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- name: Create Docker network for PostgreSQL
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docker_network:
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name: postgres_network
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state: present
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when: run_once_docker_postgres is not defined
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- name: Install PostgreSQL
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docker_container:
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name: postgres
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image: postgres:latest
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detach: yes
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env:
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POSTGRES_PASSWORD: "{{ central_postgres_password }}"
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networks:
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- name: postgres_network
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published_ports:
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- "127.0.0.1:5432:5432"
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when: run_once_docker_postgres is not defined
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- name: Run the docker_postgres tasks once
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set_fact:
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run_once_docker_postgres: true
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when: run_once_docker_postgres is not defined
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