Docker agent build script wrapper

[Oleksandr Rudak]

Hi,

We are building scientific model running and testing environment product. 
We use Jenkins as a core building, integration and model running tool. Now 
our users are scientist and have little technological background so we look 
to fold our current Jenkinsfile into something more compact and 
transparent. We've tried few things. SimpleBuildStep, which is too basic to 
handle agent/docker stuff. Step is too complicated as it involved 
distributed execution parallelism. Also we tried 'load' to load Jenkinsfile 
generated in the working directory. All ways have pros/cons but none 
provides in full what we try to accomplish.

Any ideas how to do such wrapping? I think about custom `agent` which would 
provide docker context and will imply the rest of the configuration and 
hide it from user. Possibly some workflow extension or something like this. 
Any thoughts are welcome.

Below is the anticipated Jenkinsfile how it would ideally look. Attached is 
the original Jenkins with detailed steps we want to cloak from user.

node {
    stage ('setup') {
        setupEnv (dockerImage:'dockerImage123')
    }
    stage ('train') {
        runNotebook (notebookPath:'notebookPath212')
        // { prepare, run, archive, legion }
        // runNotebook (notebookPath:'notebookPath213')
    }
    stage ('deploy') {
        deployModel ()
    }
    stage ('test') {
        testModel ()
    }
}



Thanks
Alex

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pipeline {
        agent { 
                docker {
                        image 'drun.kharlamov.biz/drun/base-python-image:latest'
                        args '-v drun:/drun -u 0:0 --network=drun_drun_root -e 
"DOCKER_TLS_VERIFY=1" -e "DOCKER_HOST=${DOCKER_HOST}" -e 
"DOCKER_CERT_PATH=${DOCKER_CERT_PATH}" -e 
"MODEL_SERVER_URL=${DRUN_MODEL_SERVER_URL}"'
                }
        }
        stages {
                stage('clone'){
                    steps {
                                sh '''
                                pip install -i https://drun.kharlamov.biz/pypi/ 
drun
                                '''
                        }
                }
                stage('run notebook'){
                        steps {
                                sh '''
                                jupyter nbconvert --execute 
"Digit-Recognition/Recognizing digits.ipynb"
                                cp "Digit-Recognition/Recognizing digits.html" 
notebook.html
                                mkdir -p release-models
                                cp -rf /drun/* release-models/
                                '''
                        }
                }
                stage('archive notebook artifacts'){
                        steps {
                                archiveArtifacts 
'release-models/image_recognize.model'
                                archiveArtifacts 'Digit-Recognition/*.html'
                                archiveArtifacts 'notebook.html'
                        }
                }
                stage('deploy to legion'){
                        steps {
                                sh '''
                                legion build 
release-models/image_recognize.model
                                legion deploy --model-id recognize_digits
                                '''
                                sleep time: 20, unit: 'SECONDS'
                        }
                }
                stage('run tests'){
                    steps {
                        sh '''
                        cd "Digit-Recognition/tests"
                        nosetests --with-xunit
                        '''
                        junit 'Digit-Recognition/tests/nosetests.xml'
                    }
                }
        }
}