EOS Platform Options

Arista EOS supports multiple connections. This page offers details on how each connection works in Ansible and how to use it.

Topics

• EOS Platform Options

  • Connections Available

  • Using CLI in Ansible

    • Example CLI group_vars/eos.yml

    • Example CLI Task

  • Using eAPI in Ansible

    • Enabling eAPI

    • Example eAPI group_vars/eos.yml

    • Example eAPI Task

    • eAPI examples with connection: local

Connections Available

	CLI	eAPI
Protocol	SSH	HTTP(S)
Credentials	uses SSH keys / SSH-agent if present accepts -u myuser -k if using password	uses HTTPS certificates if present
Indirect Access	via a bastion (jump host)	via a web proxy
Connection Settings	ansible_connection: network_cli	* ansible_connection: httpapi OR * ansible_connection: local with transport: eapi in the provider dictionary
Enable Mode (Privilege Escalation)	supported - use ansible_become: yes with ansible_become_method: enable	supported: * httpapi uses ansible_become: yes with ansible_become_method: enable * local uses authorize: yes and auth_pass: in the provider dictionary
Returned Data Format	stdout[0].	stdout[0].messages[0].

For legacy playbooks, EOS still supports ansible_connection: local. We recommend modernizing to use ansible_connection: network_cli or ansible_connection: httpapi as soon as possible.

Using CLI in Ansible

Example CLI group_vars/eos.yml

ansible_connection: network_cli
ansible_network_os: eos
ansible_user: myuser
ansible_password: !vault...
ansible_become: yes
ansible_become_method: enable
ansible_become_password: !vault...
ansible_ssh_common_args: '-o ProxyCommand="ssh -W %h:%p -q bastion01"'

• If you are using SSH keys (including an ssh-agent) you can remove the ansible_password configuration.

• If you are accessing your host directly (not through a bastion/jump host) you can remove the ansible_ssh_common_args configuration.

• If you are accessing your host through a bastion/jump host, you cannot include your SSH password in the ProxyCommand directive. To prevent secrets from leaking out (for example in ps output), SSH does not support providing passwords via environment variables.

Example CLI Task

- name: Backup current switch config (eos)
  eos_config:
    backup: yes
  register: backup_eos_location
  when: ansible_network_os == 'eos'

Using eAPI in Ansible

Enabling eAPI

Before you can use eAPI to connect to a switch, you must enable eAPI. To enable eAPI on a new switch via Ansible, use the eos_eapi module via the CLI connection. Set up group_vars/eos.yml just like in the CLI example above, then run a playbook task like this:

- name: Enable eAPI
   eos_eapi:
       enable_http: yes
       enable_https: yes
   become: true
   become_method: enable
   when: ansible_network_os == 'eos'

You can find more options for enabling HTTP/HTTPS connections in the eos_eapi module documentation.

Once eAPI is enabled, change your group_vars/eos.yml to use the eAPI connection.

Example eAPI group_vars/eos.yml

ansible_connection: httpapi
ansible_network_os: eos
ansible_user: myuser
ansible_password: !vault...
ansible_become: yes
ansible_become_method: enable
proxy_env:
  http_proxy: http://proxy.example.com:8080

• If you are accessing your host directly (not through a web proxy) you can remove the proxy_env configuration.

• If you are accessing your host through a web proxy using https, change http_proxy to https_proxy.

Example eAPI Task

- name: Backup current switch config (eos)
  eos_config:
    backup: yes
  register: backup_eos_location
  environment: "{{ proxy_env }}"
  when: ansible_network_os == 'eos'

In this example the proxy_env variable defined in group_vars gets passed to the environment option of the module in the task.

eAPI examples with connection: local

group_vars/eos.yml:

ansible_connection: local
ansible_network_os: eos
ansible_user: myuser
ansible_password: !vault...
eapi:
  host: "{{ inventory_hostname }}"
  transport: eapi
  authorize: yes
  auth_pass: !vault...
proxy_env:
  http_proxy: http://proxy.example.com:8080

eAPI task:

- name: Backup current switch config (eos)
  eos_config:
    backup: yes
    provider: "{{ eapi }}"
  register: backup_eos_location
  environment: "{{ proxy_env }}"
  when: ansible_network_os == 'eos'

In this example two variables defined in group_vars get passed to the module of the task:

• the eapi variable gets passed to the provider option of the module

• the proxy_env variable gets passed to the environment option of the module

Warning

Never store passwords in plain text. We recommend using SSH keys to authenticate SSH connections. Ansible supports ssh-agent to manage your SSH keys. If you must use passwords to authenticate SSH connections, we recommend encrypting them with Ansible Vault.