Ansible can be used to deploy the same configuration to multiple network devices with a single playbook. YAML is used to define variables, hosts, roles, tasks and other elements. For example, a playbook is shown that uses the Juniper.junos role to load and merge a configuration file to switches, prompting for username and password and checking the connection before installing the configuration. The playbook also saves configuration diffs and logs of the process.

1. Ansible: ease your config-job
Deploy same config on multiple boxes with just one shot!
Akhmad Zaimi – IP Netop Manager
Telekomunikasi Indonesia International (TELIN)

2. Requirement
• Software:
• Python 2.7
• ansible
• Roles:
 Juniper.junos
• Port Enable on network: Netconf

3. Lets learn YAML
• Start with --- end with …
• Member of list are lines beginning at the same indentation level starting with a "- " (a
dash and a space), example:
Fruits:
- apple
- orange
• Dictionary represented with simple key: value form
Martin:
name: Akhmad Zaimi
job: engineer
• List and Dictionary in other format:
---
martin: {name: Martin D'vloper, job: Developer, skill: Elite}
fruits: ['Apple', 'Orange', 'Strawberry', 'Mango']

4. Work Environment
• Platform on tested: Juniper router and switches
• List target hosts on /etc/ansible/hosts
• Roles saved in /etc/ansible/roles/
• Run on CLI:
• Ansible-playbook junos-install-config.yml
• Further, Ansible uses “{{ var }}” for variables. If a
value after a colon starts with a “{”, YAML will think it
is a dictionary, so you must quote it, like so:
/etc/ansible/hosts

5. Sample playbook
• Name file: junos-install-config.yml
---
- name: Load merge a configuration to a device running Junos OS
hosts: switches
roles:
- Juniper.junos
connection: local
gather_facts: yes
vars_prompt:
- name: USRNM
prompt: u
private: no
- name: PWOD
prompt: p
private: no
# - name: HOSTS
# prompt: h
# private: no
tasks:
- name: Checking NETCONF connectivity
wait_for: host={{ inventory_hostname }} port=830 timeout=5
- name: Retrieve info from Junos device
junos_install_config:
host: "{{ inventory_hostname }}"
# host: "{{ HOSTS }}"
user: "{{ USRNM }}"
passwd: "{{ PWOD }}"
logfile: junos-install-config.log
savedir : "/home/user1/ansible-pb/config/"
comment: "add remote backup to ssh server"
#confirm: 0
replace: 1
overwrite: 0
diffs_file: "/home/user1/ansible-pb/config/{{
inventory_hostname }}.diff"
file: /home/user1/ansible-pb/tmp_config/junos-sw-
archive-remote.conf

6. Sample: Junos config to be added
• Purpose: auto backup config after committing configuration on
remote server

7. Lets run it!
Recap:
- Open connection success –
authentication success
- Success

8. Sample: Config changes diff
• Purpose: to log any diff between old and new config change
• Help during network audit!
• Junos also has feature to track last 50 changes!

9. Sample: Script Log
• Purpose: to log the script process