Question

Program to execute Dockerfile using Jenkins declarative pipeline at a particular stage.

Precondition - a) Dockerfile name is different b) Dockerfile dir is different not in Jenkins workspace c)Both Jenkins and Docker are on same machine

Comments

Can you please provide more details

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My objective is to pull the docker image from docker hub using dockerfile.I am looking to achieve this using Jenkins declarative pileline.

Q1.What is the code behind this?

Q2.My docker file name is "hellodocker.txt" so what is the code to execute this docker file

Q3.My docker file is in a different directory and not in not in Jenkins workspace /var/lib/jenkins/workspace hence what is the code to pickup the file from other directory

Q4.What is the code to put a tag/label to the docker image?

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Are you trying to achieve all of this using the Jenkins pipeline?

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yes I am trying to achieve via the jenkins pipeline (Declarative)

Answer 1

Hey @Nishant, you can use something like this in your pipeline and in pull the docker image in your Dockerfile.

agent {
    // Equivalent to "docker build -f Dockerfile.build --build-arg version=1.0.2 ./build/
    dockerfile {
        filename 'Dockerfile.build'
        dir 'build'
        label 'my-defined-label'
        additionalBuildArgs  '--build-arg version=1.0.2'
          }
}

Basically, when you use agent as Dockerfile, it assumes that it has to execute the dockerfile. In the filename parameter specify the dockerfile name, in dir mention the directory, add a label to it using label.