Mellanox Switch

This guide explains how to set up Mellanox switches using Ansible's expect module.

This setup will also install the Python expect package on your local machine.

Requirements

Make sure the switches are set up to allow SSH access.

Role Variables

mellanox_switch_provider contains information for logging in, similar to the provider used in dellos modules. It should include:

• host: the IP address or hostname of the switch.
• username: the SSH username for accessing the switch.
• auth_pass: the password for login.

mellanox_switch_config is a list of commands to run on the switch. It starts as an empty list.

mellanox_switch_interface_config holds settings for each interface. It's a dictionary linking interface names to their configurations. Each entry can have:

• description: a label for the interface.
• config: a list of settings for that interface.

Dependencies

None

Example Playbook

This playbook configures switches in the mellanox-switches group. It expects variables that contain each switch's host, username, and password. It sets up global settings for VLAN 42 and enables two Ethernet ports in access mode.

---
- name: Ensure Mellanox switches are configured
  hosts: mellanox-switches
  gather_facts: no
  roles:
    - role: stackhpc.mellanox-switch
      mellanox_switch_provider:
        host: "{{ switch_host }}"
        username: "{{ switch_user }}"
        auth_pass: "{{ switch_auth_pass }}"
      mellanox_switch_config:
        - "vlan 42"
        - "exit"
      mellanox_switch_interface_config:
        ethernet 1/1:
          description: server-1
          config:
            - "no shutdown"
            - "switchport mode access"
        ethernet 1/2:
          description: server-2
          config:
            - "no shutdown"
            - "switchport mode access"

Author Information

• Mark Goddard (mark@stackhpc.com)