gd2-testing

Just some scripts I wrote to automate setting up glusterd2 with external etcd in a test env. Haven't put much thought into generalizing yet. It was made with a brand new centos vm in mind, and a few things may be centos specific (like the glusterfs nightly repos)

There are 2 Stages (1 script/play each)

• Stage 1: Setup nodes using bash script
  • Installing dependencies
  • Downloading and installing gd2 from source
  • Copying over some convenience scripts for running/stopping gd2 in tmux (remote_scripts/)
• Stage 2: Deploy using ansible (which also runs some stuff from remote_scripts/)
  • Specifying one of the nodes to also run the external etcd
  • Reflecting that in gd2 configuration of all nodes
  • Starting etcd and gd2
  • Add all peers

Stage 1: run the setup_gd2.bash file on each of your 3 nodes [possibly more]:

bash --verbose setup_gd2.bash <hostname>

or

bash --verbose setup_gd2.bash <hostname> <password> (this sets up passwordless ssh with that host using sshpass)

Note: sometimes setting up passwordless ssh like this fails because the host fingerprint is not in known_hosts. I hadn't realized this because I use the following lines in my ~/.ssh/config for each test VM:

Host x.x.x.x some-optional-alias1
        Hostname x.x.x.x
        Port 22
        User root
        StrictHostKeyChecking no
        UserKnownHostsFile /dev/null
        LogLevel QUIET

I use this to setup a gd2 node after a fresh centos install. It eventually sets up a tmux session setup and connects you to it so you can watch the fireworks.

Stage 2: Go to the ansible/ directory, make an inventory file like the one below, and run the ansible play:

ansible-playbook -i inventory.yml etcd.yml

Example inventory.yml:

ghosts:
  hosts:
    host1.example.com:
    host2.example.com:

  children:
    etcd:
      hosts:
        host3.example.com:

Resources:

GD2 developement guide: https://github.com/gluster/glusterd2/blob/master/doc/development-guide.md

GD2 quickstart guide: https://github.com/gluster/glusterd2/blob/master/doc/quick-start-user-guide.md

ETCD config template lives in: ansibles/templates/