DNS role

This role facilitates the configuration of the domain name service (DNS). This role is abstracted for dellos9 and requires an SSH connection for connectivity to a Dell EMC Networking device. You can use any of the built-in OS connection variables.

Installation

ansible-galaxy install Dell-Networking.dellos-dns

Role variables

• Role is abstracted using the ansible_network_os variable that can take the dellos9 value
• If dellos_cfg_generate set to true, the variable generates the role configuration commands in a file
• Any role variable with a corresponding state variable set to absent negates the configuration of that variable
• Setting an empty value for any variable negates the corresponding configuration
• Variables and values are case-sensitive

dellos_dns keys

Key	Type	Description	Support
name_server	list	Configures DNS (see name_server.*)	dellos9
name_server.domain_lookup	boolean	Enables or disables domain name lookup	dellos9
name_server.ip	list	Configures the name server IP	dellos9
name_server.vrf	list	Configures VRF for each IP	dellos9
name_server.state	string: absent,present*	Deletes the name server IP if set to absent	dellos9

NOTE: Asterisk (*) denotes the default value if none is specified.

Connection variables

Ansible Dell EMC Networking roles require connection information to establish communication with the nodes in your inventory. This information can exist in the Ansible group_vars or host_vars directories or inventory, or in the playbook itself.

Key	Required	Choices	Description
ansible_host	yes		Specifies the hostname or address for connecting to the remote device over the specified transport
ansible_port	no		Specifies the port used to build the connection to the remote device; if value is unspecified, the ANSIBLE_REMOTE_PORT option is used; it defaults to 22
ansible_ssh_user	no		Specifies the username that authenticates the CLI login for the connection to the remote device; if value is unspecified, the ANSIBLE_REMOTE_USER environment variable value is used
ansible_ssh_pass	no		Specifies the password that authenticates the connection to the remote device
ansible_become	no	yes, no*	Instructs the module to enter privileged mode on the remote device before sending any commands; if value is unspecified, the ANSIBLE_BECOME environment variable value is used, and the device attempts to execute all commands in non-privileged mode
ansible_become_method	no	enable, sudo*	Instructs the module to allow the become method to be specified for handling privilege escalation; if value is unspecified, the ANSIBLE_BECOME_METHOD environment variable value is used
ansible_become_pass	no		Specifies the password to use if required to enter privileged mode on the remote device; if ansible_become is set to no this key is not applicable
ansible_network_os	yes	dellos6/dellos9/dellos10, null*	Loads the correct terminal and cliconf plugins to communicate with the remote device

NOTE: Asterisk (*) denotes the default value if none is specified.

Dependencies

The dellos-dns role is built on modules included in the core Ansible code. These modules were added in Ansible version 2.2.0.

Example playbook

This example uses the dellos.dellos-dns role to completely set up the DNS server configuration. The example creates a hosts file with the switch details and corresponding variables. The hosts file should define the ansible_network_os variable with corresponding Dell EMC networking OS name.

When dellos_cfg_generate is set to true, generates the configuration commands as a .part file in build_dir path. By default it is set to false. It writes a simple playbook that only references the dellos-dns role. By including the role, you automatically get access to all of the tasks to configure DNS.

Sample hosts file

leaf1 ansible_host= <ip_address> 

Sample host_vars/leaf1

hostname: leaf1
ansible_become: yes
ansible_become_method: xxxxx
ansible_become_pass: xxxxx
ansible_ssh_user: xxxxx
ansible_ssh_pass: xxxxx
ansible_network_os: dellos9
build_dir: ../temp/dellos9	  
dellos_dns:
   domain_lookup: true
   name_server:
	 - ip:
		- 1.1.1.1
		- 1.1.1.2
	   vrf:
		- test
		- management
	   state: absent
	 - ip:
		- 2.2.2.2
	 - ip:
		- 3.3.2.2
	   state: absent

Simple playbook to setup DNS - leaf.yaml

- hosts: leaf1
  roles:
     - Dell-Networking.dellos-dns

Run

ansible-playbook -i hosts leaf.yaml

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