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Preprocess Tanzu Artifacts to Match Supported Types

Currently, this feature is behind the Feature Flag CF_CUSTOM_EXTRACTION. Contact Harness Support to enable the feature. Harness supports the most common Tanzu Application Services (formerly PCF) artifact package types.

If your artifact doesn't match the supported types, you can run a script to preprocess the artifact (unzip, untar, etc). Preprocessing occurs when setting up the app during deployment.

Before You Begin​

Limitations​

  • Preprocessing is for non-Docker artifacts.

Review: Supported Artifact Types​

Harness supports the following TAS artifact servers/types.

Metadata-only Sources:

  • Jenkins
  • AWS (Amazon Web Services) S3
  • Artifactory (includes Docker)
  • Nexus
  • Bamboo

File-based Sources:

  • Docker Registry
  • Artifactory (Tgz files)
  • Nexus (Tgz files)
  • Google Container Service (GCS)
  • AWS Elastic Container Registry (ECR)
  • SMB
  • SFTP
  • Custom Repository

Harness supports any single file (non-folder) deployed using cf push. TAR, WAR, JAR, ZIP, and Docker are supported.

Step 1: Select Preprocessing in App Setup Step​

This step assumes you've created a TAS Workflow before. If not, see:

Open the App Setup step in the Workflow.

Select Pre-Process Package for TAS Deployment. The script option appears.

Step 2: Add Preprocessing Script​

Enter a script to perform preprocessing on the downloaded artifact before deployment.

Reference the downloaded artifact using the expression ${downloadedArtifact}.

For example:

tar -xvf ${downloadedArtifact}

Copy the processed artifact to a directory using ${processedArtifactDir}.

For example:

cp myfolder/helloworld.war ${processedArtifactDir}

The entire preprocessing script might look like this:

tar -xvf ${downloadedArtifact}  
  
cp myfolder/helloworld.war ${processedArtifactDir}

Let's look at another example:

Let's say you have a zip archive that contains a folder named myArtifact. Inside the myArtifact folder is an artifact named myArtifact.war.

You unzip the archive:

unzip ${downloadedArtifact}

Once you unzip the archive the result is myArtifact/myArtifact.war.

Next, you need to copy myArtifact.war to a directory. The directory is identified using the expression ${processedArtifactDir}.

For example:

cp myArtifact/myArtifact.war ${processedArtifactDir}

Step 3: View the Preprocessing in the Deployment Logs​

When you deploy the Workflow the preprocessing is shown in the logs for the App Setup step.

Here's an example:

# Executing artifact processing script:   
._package2  
package2/  
package2/._index.js  
package2/index.js  
package2/._package.json  
package2/package.json  
SUCCESS

See Also​