Worker Model OpenStack

CDS build using OVH.com OpenStack infrastructure

Create OpenStack user

In OVH manager, in cloud section, click on the menu on the Servers>OpenStack item.

You will be able to create a worker model OpenStack user, enter description (name and password will be generated).

Add OpenStack worker model

We need to define an OpenStack worker model to have OpenStack hatchery booting workers.

We will create a model called testopenstack:

With low hardware capacity (vps-ssd-1)
On Debian 8
With Docker ready to use
Git installed

You need to configure:

The image is your image on which you want to spawn your OpenStack VM
The flavor of your OpenStack VM
Pattern: if you aren’t an administrator you have to choose a configuration pattern in order to fill pre command, worker command and post command with a pattern that an administrator have already fill for you.
If you are an administrator:
- pre worker command: all scripts that need to be run before execute the worker binary (for example: set the right environment variables, install curl and other tools you need like Docker, …)
- main worker command: the command launched to run the worker with right flags thanks to the interpolate variables that CDS fill for you (more information click here).
- post worker command: the command launched after the execution of your worker. If you need to clean something and then shutdown the VM.

Via UI (inside settings section –> worker models):

For example:

Or via CLI with a yaml file:

$ cds worker model import my_worker_model.yml

name: testopenstack
type: openstack
description: "my worker model"
group: shared.infra
image: "Debian 7"
flavor: vps-ssd-1
pre_cmd: |
  #!/bin/bash
  set +e
  # Basic build binaries
  cd $HOME
  apt-get -y --force-yes update >> /tmp/user_data 2>&1
  apt-get -y --force-yes install curl git >> /tmp/user_data 2>&1
  apt-get -y --force-yes install binutils >> /tmp/user_data 2>&1
  # Docker installation (FOR DEBIAN)
  if [[ "x{{.FromWorkerImage}}" = "xtrue" ]]; then
    echo "$(date) - CDS_FROM_WORKER_IMAGE == true - no install docker required "
  else
    # Install Docker
    apt-get install -y --force-yes apt-transport-https ca-certificates >> /tmp/user_data 2>&1
    apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
    mkdir -p /etc/apt/sources.list.d
    sh -c "echo deb https://apt.dockerproject.org/repo debian-jessie main > /etc/apt/sources.list.d/docker.list"
    apt-get -y --force-yes update >> /tmp/user_data 2>&1
    apt-cache policy docker-engine >> /tmp/user_data 2>&1
    apt-get install -y --force-yes docker-engine >> /tmp/user_data 2>&1
    service docker start >> /tmp/user_data 2>&1
    # Non-root access
    groupadd docker >> /tmp/user_data 2>&1
    gpasswd -a ${USER} docker >> /tmp/user_data 2>&1
    service docker restart >> /tmp/user_data 2>&1
  fi;
  curl -L "{{.API}}/download/worker/linux/$(uname -m)" -o worker --retry 10 --retry-max-time 120 -C - >> /tmp/user_data 2>&1
  chmod +x worker  

cmd: "./worker --api={{.API}} --token={{.Token}} --basedir={{.BaseDir}} --model={{.Model}} --name={{.Name}} --hatchery={{.Hatchery}} --hatchery-name={{.HatcheryName}} --insecure={{.HTTPInsecure}} --single-use --force-exit"

post_cmd: sudo shutdown -h now