Ansible role to manage and run the elasticsearch docker container.

This role has only been tested on Ubuntu 14.04. Since this uses Ansible's docker module, you will need to ensure that a recent-ish version of docker-py and docker are installed.

Install this module from Ansible Galaxy into the './roles' directory:

ansible-galaxy install wangsha.docker-elasticsearch -p ./roles

Use it in a playbook as follows, assuming you already have docker setup:

- hosts: 'servers'
  roles:
    - role: angstwad.docker_ubuntu
      become: true
    - role: wangsha.docker-elasticsearch
      become: true

Have a look at the defaults/main.yml for role variables that can be overridden.

If you need a playbook to set Docker itself, have a look at angstwad.docker_ubuntu Galaxy role.

To enable mlockall on docker container, follow this post to configure docker deamon. Top section of the file /etc/init/docker.conf looks like:

description "Docker daemon"

start on (filesystem and net-device-up IFACE!=lo)
stop on runlevel [!2345]
limit nofile 524288 1048576
limit nproc 524288 1048576
limit memlock unlimited unlimited
respawn

...

Docker allows mounting a host directory or a host file as data volume. This role mounts host directories to persist container data and host files to configure container behavior. docker_elasticsearch_directory_volumes and docker_elasticsearch_file_volumes are the two variables to control volume mappings. If you wish to customize the mapping, please follow <host directory>:<container directory>:<mapping mode> format to ensure host directories are correctly created before launching containers.

To customize host file mappings, update docker_elasticsearch_file_volumes. This role will automatically create file parent directories and copy the template to host machine. The naming convention for template is <host_file_name>.<host_file_extension>.j2. To copy template from your own ansible diretories, set docker_elasticsearch_template_path.

Example Config:

docker_elasticsearch_file_volumes:
  - '/opt/myapp/conf/settings.conf:/etc/myapp/conf/settings.conf:ro'
docker_elasticsearch_template_path: /path/to/ansible/project/templates/
# make sure file /path/to/ansible/project/templates//settings.conf.j2 exists. 

• default docker image

MIT

• wangsha