Dynamically defining parallel steps in declarative jenkins pipeline

If you want to use dynamic parallel block with declarative pipeline script, you have to apply two changes to your Jenkinsfile:

1. You have to define running_set as a Map like ["task 1": { somefunc()}, "task 2": { somefunc2() }] - keys from this map are used as parallel stages names
2. You have to pass running_set to parallel method inside script {} block

Here is what updated Jenkinsfile could look like:

def somefunc() {    echo 'echo1'}def somefunc2() {    echo 'echo2'}running_set = [    "task1": {        somefunc()    },    "task2": {        somefunc2()    }]pipeline {    agent none    stages{        stage('Run') {            steps {                script {                    parallel(running_set)                }            }        }    }}

And here is what it looks like in Blue Ocean UI:

It is not obvious. But Szymon's way can be very straightforward.

pipeline {    agent none    stages{        stage('Run') {            steps {                script {                    parallel([                        'parallelTask1_Name': {                            any code you like                        },                        'parallelTask2_Name': {                            any other code you like                        },                        ... etc                    ])                }            }        }    }}