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Last active August 15, 2022 18:34
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This gist explains how to integrate ServiceNow with Tanzu Application Platform Supply Chain
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snow_tap.md

Problem Statement

Tanzu Application Platform leverages Cartographer's Supply chain to orchestrate the CI/CD Process. However TAP works with tools installed within the TAP Cluster like Tekton, Flux, Grype etc. In this Gist, we will look at integrating TAP with external tools like ServiceNow.

Note

For the purpose of this Demo - We took the liberty to integrate TAP Supply chain with the Snow's Incident module. However integrating with other modules like ChangeRequest, RITM, Task follows the same pattern. The only change would be to update the API call to point to the other modules.

Prerequisites

  • K8s Cluster with Tanzu Application Platform 1.2 Installed

  • Running SNOW Dev Instance - A Dev Instance can be spun up here.

Does this work for other integrations ?

Yes, this integration is not limited to just ServiceNow - the tekton scripts attached to gist will work with any rest api. All thats required is to update the respective API before kicking off the supply chain.

How does External Integrations work with Tanzu Application Platform ?

Tanzu Application Plaform uses Tekton to get any custom integrations accomplished. As of this gist, there is no other plugin that integrates external tools.

In order to create a custom integration - below is the order in which different templates need to be created

# supplychain 
#     clustersourcetemplate
#           runnable
#                 ref: clusterruntemplate
#                           pipelinerun
#                                  pipeline

  • A custom supply chain that references the clustersourcetemplate in the steps.

  • A clustersourcetemplate that references the runnable and clusterruntemplate specific to the SNOW Integreation

  • A Tekton PipelineRun that references the selector labels of the pipeline.

  • A pipeline that does the actually integration itself.

The above scripts are available in the github repo linked here.

Test the Integration

  • Submit the workload pointing to the label selector of the new custom supply chain referencing the snow integration. Link on how to submit your first workload is here.

  • Access the tap-gui to see if the step is waiting for the snow approval

  • Navigate to the snow portal and approve/resolve the ticket.

  • Verify if the supply chain picked the changes up and deployed to the code to the respective environment upon approval/resolution.

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