the worlds gone mad

we've lost the hope we had

Posted on 9 October 2021   13 min read

Nornir: Tasks, Plugins and Templates

building and running tasks

Nornir tasks are run against all or a subset of inventory members with the result formatted into a framework structured to show what was run against whom and the results. Tasks can be custom built python code or pre-built plugins that have been installed and imported.

Posted on 23 March 2021   14 min read

Automate Leaf and Spine Deployment - Part6

post validation

The 6th post in the ‘Automate Leaf and Spine Deployment’ series goes through the validation of the fabric once deployment has been completed. A desired state validation file is built from the contents of the variable files and compared against the devices actual state to determine whether the fabric and all the services that run on top of it comply.

Posted on 20 March 2021   25 min read

Automate Leaf and Spine Deployment - Part5

fabric services: tenant, interface, route

The 5th post in the ‘Automate Leaf and Spine Deployment’ series goes through the deployment of the services that run on top of the fabric. These services are grouped into 3 categories, tenant, interface and routing. Services are configured only on the leaf and border switches, the spines have no need for them as they just route the VXLAN encapsulated packets with no knowledge or care of what is within them.

Posted on 13 February 2021   15 min read

Automate Leaf and Spine Deployment - Part3

fabric variables and dynamic inventory

The 3rd post in the ‘Automate Leaf and Spine Deployment’ series goes the through the variables from which the core fabric declaration is made and how this transposes into a dynamic inventory. This uses only the base and fabric roles to create the fabric ready for the service sub-roles (tenant, interface and route) to be deployed on top of the fabric at a later stage.
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