Docker Compose Demo

This is an example of how Docker can be used to compose a complete environment. The containers used in this demo are:

• dockerui: Container that exposes DOcker UI dashboard.
• apache: Apache HTTPD used as a front of JBoss.
• jboss: App "task-viewer" running on Jboss 5.1.0GA with Java 6. The image is based on Centos 6.7. The application is downloaded from "https://github.com/yannart/task-viewer.git" and compiled with Maven when the Docker image is built.
• webapp: App "task-manager-app" running as an executable jar with an embedded Tomcat server on Java 8. The image is based on last version available of Centos 6.7. The application is downloaded from "https://github.com/yannart/task-manager-app.git" and compiled with Maven when the Docker image is built.
• mysql: MySQL server based on official Docker image, loads initial SQL script at first execution to prepare the schema required by the applications.
• elasticsearch and elasticsearchbis: Elasticsearch containers using the last Elasticsearch official image. The two containers are used to form an Elasticsearch cluster.
• activemq: Last version available of webcenter/activemq Docker image.

Installation

Windows

Install Docker Toolbox

Download and install Docker Toolbox (require >= 1.9.1c): https://www.docker.com/docker-toolbox

Add these lines in "C:\Windows\System32\drivers\etc\hosts":

DOCKER_HOST_IP mysql
DOCKER_HOST_IP docker.host

Where DOCKER_HOST_IP is the IP of Docker VM.

Create / start the Docker host VM

• Open the bash console included with Git and move to the project location.

• If you want to specify a specific location to store the Docker VM, use the environment variable MACHINE_STORAGE_PATH:

  export MACHINE_STORAGE_PATH=/path/to/vm
  

• Create the docker host virtual machine:

  docker-machine create ggdocker --driver virtualbox --virtualbox-cpu-count "4" --virtualbox-memory "4096" --virtualbox-no-share
  docker-machine stop ggdocker
  

Where:

• --virtualbox-cpu-count number of CPUs for the machine (-1 to use the number of CPUs available)
• --virtualbox-memory size of memory for host in MB
• --virtualbox-no-share Disable the mount of your home directory

Full options:

docker-machine create --driver virtualbox --help

• In VirtualBox, modify the ggdocker VM to:

  • Setup a shared folder "container_data" checking the option "auto-mount". The selected folder in Windows will contain the data and logs of the containers.

• Start the VM docker-machine start ggdocker

• Execute the commands to share the folder:

  docker-machine.exe ssh ggdocker 'sudo mkdir --parents //container_data'
  docker-machine.exe ssh ggdocker 'sudo mount -t vboxsf container_data //container_data'
  

• Update the Docker environment

  eval "$(docker-machine env ggdocker)"
  export DOCKER_HOST_IP=`docker-machine ip ggdocker`
  

  It can be required, if asked, to regenerate the certificates used to communicate with docker daemon:

  docker-machine regenerate-certs ggdocker
  

Linux

Install Docker & Docker compose

Follow the installation instructions in https://docs.docker.com/engine/installation/ and https://docs.docker.com/compose/install/.

Add these lines in "/etc/hosts":

DOCKER_HOST_IP mysql
DOCKER_HOST_IP docker.host

Where DOCKER_HOST_IP is the IP of Docker VM.

Run the containers

docker-compose up -d

• Access to the web consoles (Be sure you added "docker.host" to your "hosts" file):

  • Webapp Task Management: http://docker.host:8090/home
  • ActiveMQ: http://docker.host:8161/admin/
  • Apache:
    • Root: http://docker.host
    • Task Viewer: http://docker.host/task-viewer/
  • Elasticsearch:
    • HTTP API: http://docker.host:9200 and http://docker.host:9201
    • Kopf dashboard: http://docker.host:9200/_plugin/kopf/ and http://docker.host:9201/_plugin/kopf/
    • Cluster nodes information: http://docker.host:9200/_nodes/http?pretty and http://docker.host:9201/_nodes/http?pretty
  • Docker UI: http://docker.host:9000
  • JBoss:
    • Management (if port 8080 is exposed): http://docker.host:8080
    • Task Viewer (if port 8080 is exposed): http://docker.host:8080/task-viewer

• Other commands: To execute a bash inside an image:

  docker exec -i IMAGEID bash
  

To force to rebuild a project:

docker-compose build --no-cache apache