Variables in a Jenkinsfile can be defined by using the def keyword. Such variables should be defined before the pipeline block starts. When variable is defined, it can be called from the Jenkins declarative pipeline using ${…} syntax.
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Jenkins Pipeline: Conditionally Define Variables – Groovy Script
The Groovy scripting language supports conditional structures, that can be used in Jenkins pipelines. Assume that you have a parametrized Jenkins job and in a Jenkinsfile you have a variable that should be defined depending on provided parameters. Here is an example of how to conditionally define variables in a Jenkins pipeline using the Groovy […]
Install Jenkins – Ubuntu, CentOS
What is Jenkins? Jenkins is a well-known open source CI/CD (Continuous Integration and Continuous Delivery) automation server written in Java. In this tutorial i will show how to install Jenkins on Ubuntu-18.04, 16.04 and Centos-7, 6 and how to perform initial Jenkins configuration. Jenkins requires Java, so firstly it needs to install OpenJDK-8 JRE/JDK (Java […]