vagrant-swarm

Description

Vagrantfile to create a three node Docker Swarm cluster using ScaleIO and Rex-Ray.

Usage

This Vagrant setup will automatically deploy three CentOS 7.2 nodes, download the ScaleIO 2.0 software and install a full ScaleIO cluster. Furthermore a Docker Swarm cluster is created and support for persistent storage is added using Rex-Ray!

To use this, you'll need to complete a few steps:

1. git clone https://github.com/vchrisb/vagrant-swarm.git
2. Run vagrant up
3. Login into one node: vagrant ssh node1
4. Login into ScaleIO: scli --mdm_ip 192.168.100.11,192.168.100.12 --login --username admin --password Scaleio123 --approve_certificate
5. Validate ScaleIO; scli --mdm_ip 192.168.100.11,192.168.100.12 --query_all
6. Validate docker swarm: docker node ls
7. Validate RexRay: docker volume ls

Example workload

Running stateful Wordpress:

1. Create network for communication between wordpress and mariadb: docker network create --driver overlay wp_nw
2. Create volume for mariadb: docker volume create -d scaleio --name wp_db
3. Create volume for wordpress: docker volume create -d scaleio --name wp_content
4. Start mariadb: docker service create --name wordpress_db --network wp_nw --mount type=volume,volume-driver=scaleio,source="wp_db",target=/var/lib/mysql -e MYSQL_ROOT_PASSWORD=Passw0rd mariadb
5. Start wordpress: docker service create --name wordpress --network wp_nw --mount type=volume,volume-driver=scaleio,source="wp_content",target=/var/www/html/wp-content -e WORDPRESS_DB_HOST=wordpress_db -e WORDPRESS_DB_PASSWORD=Passw0rd -p 80:80 wordpress
6. Access wordpress on any of the nodes: http://192.168.100.11
7. Create some sample content

Test failure:

1. Remove wordpress docker service rm wordpress
2. Remove mariadb docker service rm wordpress_db
3. Start mariadb: docker service create --name wordpress_db --network wp_nw --mount type=volume,volume-driver=scaleio,source="wp_db",target=/var/lib/mysql -e MYSQL_ROOT_PASSWORD=Passw0rd mariadb
4. Start wordpress: docker service create --name wordpress --network wp_nw --mount type=volume,volume-driver=scaleio,source="wp_content",target=/var/www/html/wp-content -e WORDPRESS_DB_HOST=wordpress_db -e WORDPRESS_DB_PASSWORD=Passw0rd -p 80:80 wordpress
5. Access wordpress on any of the nodes: http://192.168.100.11 and validate that it kept your content!

Troubleshooting

If anything goes wrong during the deployment, run vagrant destroy -f to remove all the VMs and then vagrant up again to restart the deployment.