Here we have compiled the most probable DevOps interview questions asked in the industry. You will learn about software version control, Git repository, reverting a commit in Git, Vagrant, continuous testing elements, and the importance of continuous integration, testing, and deployment. These questions are curated after discussing with many interviewers and DevOps Training experts.
You should restart the pipeline from the second job where it failed, by doing "restart from Stage".
The Cron Syntax, it is represented using five asterisks (* * * * *) each separated by a space. The Syntax is as follows [Minute] [Hours] [Day Of the Month] [Month] [Day Of the Week].
If you want to set up a cron for every Monday at 06 59 AM it would be 59 06 ** 1. Here 59 is a minute and 06 is hour and * represents all days of the month and another star represents all months and 1 denotes monday.
For your clear understanding of Cron Syntax:
MINUTE - Minutes within the hour (0–59)
HOUR - The hour of the day (0–23)
DOM - The day of the month (1–31)
MONTH - The month (1–12)
DOW - The day of the week (0–7) where 0 and 7 both are Sunday.
Devops is a culture followed by the company to collaborate, communicate, automate and integrate jobs of developers (dev team) and the IT operations. By making the whole product life cycle simpler. In order to improve speed and quality of release, Jenkins plays a Crucial role in DevOps, it automates code integration, automates builds, Tests and automates deployments.
Here are some Jenkins Environment variables used in shell script,
Multibranch pipeline creates a separate Jenkinsfile for each branch in a project. It means it will automatically create a pipeline for each branch and stores in SCM.
Different types of jobs/Projects are listed while creating a new job in Jenkins, and those are:
The minimum hardware requirements:
Pipeline is a group of jobs that are chained and integrated in sequence to execute. The automation of Pipeline jobs (to build, test, release) is CI/CD pipeline. The automated pipeline saves a lot of time in the builds.
|Jenkins is Open source.||Bamboo is very expensive.||TeamCity is a little expensive.|
|Very easy to set up and use.||Little complex to set up and use.||Setting up and using is easy but not as jenkins.|
|Has less built in features but there are lots of plugins to integrate.||Has more built in features than Jenkins but very less plugins to integrate.||Has advanced built in features than jenkins and bamboo, but has less plugins.|
|Supports cloud hosting.||Runs on local machine/ Bitbucket as cloud.||Runs on local machine.|
Triggers are defined as when and how pipelines should be executed. Jenkins polls SCM periodically at configured time, if it detects the new commit then triggers a build.
Ex: You can create jobs that polls the SCM and triggers when a change is pushed.
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