In a previous post, I talked about how you can use Ansible to automate Cisco IOS device upgrades. In this post I will show you how easily you can do the same thing on Junos. 

With Cisco IOS, I had to use several modules in my playbook to be able to automate the upgrade process because there was not a single module available that could handle all the tasks.  

As I was trying to expand my Ansible knowledge, I began looking at the available Ansible networking modules that run on Juniper devices. It turns out junos_package is a core module (comes installed with Ansible) and can take care of the entire process: copy the package to the device flash, install the package, commit, and reboot.

My Setup:

– Python 2.7.6 and Ansible 2.2 running on Ubuntu 14.4.5 LTS (codename: Trusty)

– Juniper vSRX running version 12.1X47-D10.4

Requirements:

– You need to have Ansible and Junos PyEZ installed. Junos PyEZ is a Python library to manage remotely and automate Junos devices.

– Netconf and SSH enabled on the Junos device. 

 The following playbook consists of few tasks: Ansible collects first device facts. Then the junos_package module compares the running version on the Junos device with the version defined in the “package” variable and upgrades the device if there is a mismatch. Once the device reboots with the new package, Ansible will wait until that device becomes reachable via Netconf and then attempts to ping a root DNS from the device to check internet connectivity. If the destination is not reachable, Ansible will generate a “ping failed” error.

You can of course expand this playbook to include tasks to verify that routing protocols have come up after the reboot. 

 


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