Docker Cluster Installation Guide

In order to install a Docker cluster, you may need to install a "backend" such as Consul first. Assume that we have some following hosts:

host	IP	consul mode	docker mode
1	192.168.1.2	server	node
2	192.168.1.3	server	node
3	192.168.1.4	client	node
4	192.168.1.5	client	node
5	192.168.1.100	N/A	manager

The column "docker mode" means that we want to create a Docker cluster across first 4 nodes and the last node used for managing the cluster.

The column "consul mode" means that we are using the first 2 nodes as Consul servers and others as Consul clients.

All of these are forming a Consul cluster that will be used as a back-end of our Docker cluster

Install Consul cluster

The cluster is to be used as a back-end for Docker cluster

For each host [192.168.1.2 -> 192.168.1.5], check out and install Consul:

      cd ~/
      git clone https://github.com/nhantran/docker-cluster-installer.git
      cd docker-cluster-installler
      sudo ./installConsul --bootstrap-ip "192.168.1.2,192.168.1.3"

Verify the installation on any hosts [192.168.1.2 -> 192.168.1.5]

      consul members

Install Docker cluster

This cluster is using the recent installed Consul cluster above as back-end

For each host [192.168.1.2 -> 192.168.1.5], run the following command

      sudo ./installDocker --node --consul-ip 192.168.1.2

On the host [192.168.1.100], run the following command

      sudo ./installDocker --manager --consul-ip 192.168.1.2

Verify the installation on the "manager" host [192.168.1.100]

List cluster info

      docker -H :2385 info

List out containers on cluster:

     docker -H :2385 ps

View log from each Cassandra container/service

      docker -H :2385 logs <container-id>

Submit a "start nginx container" request

      docker -H :2385 run -d --name www -p 80:80 nginx:1.7.11

Verify registered services

      curl http://192.168.1.2:8500/v1/catalog/services | python -m json.tool
      curl http://192.168.1.2:8500/v1/catalog/service/nginx-80 | python -m json.tool