Jenkins job can be triggered in many ways using poll SCM, webhooks. Well, you can also trigger a Jenkins job from Slack as well. We will be leveraging Slash commands feature from Slack.
Slash Commands allow users to invoke your app by typing a string into the message composer box.
Pre-requistes:
Make sure you have already created a channel in Slack.
Steps in Jenkins:
Create a Token for the build job you want to trigger from Slack
Go to Jenkins --> Click on the Job you would like to trigger from Slack --> Configure
Go to build triggers section.
We will be using the following URL to trigger builds from Slack
http://jenkins_dns_name/job/jobName/build?token=myToken
Allow anonymous read only access
Go to Manage Jenkins --> Configure Global security, click on Allow anonymous read only access.
Apply, Save.
Steps in Slack:
1. Go to the channel from where you would like to trigger builds.
2. Channel settings --> Click on More --> Click Add apps
Type slash commands and add it
Click on view in app directory
Click on Add to Slack
Enter a command - single word something like /build (it should be one word no spaces or characters)
Click on Add Slash command integration
Enter Jenkins URL, like mentioned above -
http://jenkins_dns_name/job/jobName/build?token=myToken
Method as GET
and scroll down click on the check box like below
And click Save Integration
Go to channel, enter the command as shown below:
/build
and press enter
Now your build job should run instantly in Jenkins.
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