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Nodepool - Static

The static driver allows you to use existing compute resources, such as real hardware or long-lived virtual machines, with nodepool.

Node Requirements

Any nodes you setup for nodepool (either real or virtual) must meet the following requirements:

  • Must be reachable by Zuul executors and have SSH access enabled.
  • Must have a user that Zuul can use for SSH.
  • Must have Python 2 installed for Ansible.
  • Must be reachable by Zuul executors over TCP port 19885 (console log streaming).

When setting up your nodepool.yaml file, you will need the host keys for each node for the host-key value. This can be obtained with the command:

ssh-keyscan -t ed25519 <HOST>

Nodepool Configuration

Below is a sample Nodepool configuration file that sets up static nodes. Place this file in /etc/nodepool/nodepool.yaml:

sudo bash -c "cat > /etc/nodepool/nodepool.yaml <<EOF
zookeeper-servers:
  - host: localhost

labels:
  - name: ubuntu-xenial

providers:
  - name: static-vms
    driver: static
    pools:
      - name: main
        nodes:
          - name: 192.168.1.10
            labels: ubuntu-xenial
            host-key: "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGXqY02bdYqg1BcIf2x08zs60rS6XhlBSQ4qE47o5gb"
            username: zuul
          - name: 192.168.1.11
            labels: ubuntu-xenial
            host-key: "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGXqY02bdYqg1BcIf2x08zs60rS6XhlBSQ5sE47o5gc"
            username: zuul
EOF"

Make sure that username, host-key, IP addresses and label names are customized for your environment.