WordPress, Prometheus and Grafana on docker using Ansible

Here's is the quick start on wordpress application setup using docker compose and setup on monitoring tools such as prometheus, grafana, cadvisor on docker container using docker compose. AWS instances are used and configured with help of ansible.

AWS Infra details

Ansible script is used to create and configure instances which are used to for the wordpress and monitoring application. Ansible playbook is created to launch the instance using auto-scaling group and launch configuration. Two instances are created one for the wordpress setup and another for the monitoring application setup.

Launch config code snippet :

  ec2_lc:
    name: "{{ lc_name }}"
    image_id: "{{ image_id }}"
    key_name: "{{ keypair }}"
    region: "{{ region }}"
    security_groups: "{{ security_groups }}"
    instance_type: "{{ type }}"

Autoscaling group code snippet :

  ec2_asg:
    name: "{{ asg_name }}"
    launch_config_name: "{{ lc_name }}"
    region: "{{ region }}"
    vpc_zone_identifier: "{{ asg_subnet_id }}"
    availability_zones: "{{ asg_az }}"
    health_check_period: 60
    health_check_type: EC2
    replace_all_instances: yes
    min_size: 1
    max_size: 1
    desired_capacity: 1

Wordpress

WordPress is a free and open-source content management system (CMS) based on PHP and MySQL. Numerous websites and blogs are created on WordPress platform. Here WordPress is hosted on docker container inside aws instance. Instance is configured using ansible playbook which install docker and docker compose. Docker compose uses the latest wordpress and mysql image from docker hub and build the container with configuration and then start it.

WordPress docker compose config

    image: wordpress:latest
    ports:
      - 80:80
    volumes:
      - ./wp-app:/var/www/html # Full wordpress project
    depends_on:
      - db

Mysql docker compose config

    image: mysql:latest
    ports:
      - 3306:3306
    volumes:
      - ./wp-data:/docker-entrypoint-initdb.d

Monitoring Applications

Prometheus along with grafana is configured to monitor docker and show it in the dashboard. Instance is configured using ansible playbook which install docker and docker compose. Applications are launched inside docker container using docker compose.

Prometheus docker compose config

    image: prom/prometheus
    container_name: prometheus
    ports:
      - 9090:9090

Grafana docker compose config

    image: grafana/grafana
    depends_on:
      - prometheus
    ports:
      - 3000:3000

Prometheus

Prometheus is an open-source systems monitoring and alerting toolkit originally built at SoundCloud. Prometheus is used to monitor and collect and store it in time series format. Prometheus configuration found here

Grafana

Grafana is an open source metric analytics & visualization suite. It is most commonly used for visualizing time series data for infrastructure and application analytics. Grafana dashboard found here

Steps to configure grafana dashboard

1. Select the datasource type to prometheus
2. Provide the prometheus URL default - http://localhost:9090
3. Set the datasource access type to Proxy
4. Import dashboard from json and select the prometheus datasource.

Sourcecode reference

+--playbook
|  +--instance-launch #launch aws ec2 instance via asg and lc
|  +--monitoring #Install docker and run docker compose for monitoring app
|  +--wordpress #Install docker and run docker compose for wordpress app
+--docker
|  +--monitoring #docker compose for prometheus, grafana, cadvisor
|  +--wordpress #docker compose for worpress and mysql
+--README.md

Reference

• http://docs.ansible.com/ansible/latest/list_of_cloud_modules.html
• http://docs.ansible.com/ansible/latest/list_of_commands_modules.html
• http://docs.aws.amazon.com/autoscaling/latest/userguide/LaunchConfiguration.html
• http://docs.aws.amazon.com/autoscaling/latest/userguide/asg-in-vpc.html
• https://docs.docker.com/engine/installation/linux/docker-ce/ubuntu/
• https://docs.docker.com/compose/install/
• https://docs.docker.com/samples/wordpress/
• https://prometheus.io/docs/introduction/overview/
• http://docs.grafana.org/
• https://grafana.com/dashboards/893