Jaycean / docker-hawk

Docker container with a cluster stack (Pacemaker, corosync, crmsh and Hawk)

HA cluster in a container

This repository contains the definition of a Docker container which contains the Pacemaker/corosync stack, with the crmsh command line interface and the Hawk web interface as tools for interacting with the cluster.

Run an instance of the Hawk container on each cluster node.

Getting the container

Either download it from the Docker Hub:

    docker pull krig/hawk

Or build it from a clone of this repository:

    docker build -t <username>/hawk .

Running the container

    docker run -d \
        --privileged \
        --net=host -p 7630:7630 \
        -v /sys/fs/cgroup:/sys/fs/cgroup \
        -v /etc/localtime:/etc/localtime:ro \
        -v /run/docker.sock:/run/docker.sock \
        -v /usr/bin/docker:/usr/bin/docker:ro \
        --name hawk krig/hawk

Then (if this is the first cluster node), initialize the cluster:

    docker exec -it hawk bash
    ha-cluster-init

Else join the cluster:

    docker exec -it hawk bash
    ha-cluster-join -c <any-cluster-node>

Hawk will be available at https://localhost:7630, and the default credentials are user: hacluster, password: linux.

You can then manage docker containers as cluster resources using the ocf:heartbeat:docker resource agent.

Note on STONITH

For STONITH, you may be able to use the fence_docker agent.

Hawk will warn about the lack of STONITH. For testing purposes, you can disable STONITH with the following command:

    docker exec -it hawk bash
    crm cfg property stonith-enabled=false

Credits

This container was largely based on the pcs version created by @pschiffe.