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Hossam Radwan
Hossam Radwan

Reputation: 15

How to extract command output from the multi lines shell in Jenkins

How to get the output of kubectl describe deployment nginx | grep Image in an environment variable?

My code:

stage('Deployment'){
    script {                                   
        sh """
        export KUBECONFIG=/tmp/kubeconfig
        kubectl describe deployment nginx | grep Image"""
    }
}

Upvotes: 0

Views: 135

Answers (2)

jinxx_
jinxx_

Reputation: 1

You can use the syntax:

someVariable = sh(returnStdout: true, script: some_script).trim()

Upvotes: 0

Matthew Schuchard
Matthew Schuchard

Reputation: 28884

In this situation, you can access the environment variables in the pipeline scope within the env object, and assign values to its members to initialize new environment variables. You can also utilize the optional returnStdout parameter to the sh step method to return the stdout of the method, and therefore assign it to a Groovy variable (because it is within the script block in the pipeline).

script {             
  env.IMAGE = sh(script: 'export KUBECONFIG=/tmp/kubeconfig && kubectl describe deployment nginx | grep Image', returnStdout: true).trim()
}

Note you would also want to place the KUBECONFIG environment variable within the environment directive at the pipeline scope instead (unless the kubeconfig will be different in different scopes):

pipeline {
  environment { KUBECONFIG = '/tmp/kubeconfig' }
}

Upvotes: 1

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