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I have a Jenkins job to stop a node application, deploy code, and start the application.
The start/stop is done with an Upstart script.
I use initctl stop node-App
If the job is running, this works great. But if the app has died or is in a stopped state, the output is initctl: Unknown instance:
This causes the Jenkins job to fail and not proceed to the next steps.
Is there a way to check if the job is started before issuing the start command? Or is there a way for Jenkins to not consider that an error and fail the job?
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Upstart is an event-based replacement for the /sbin/init daemon which handles starting of tasks and services during boot, stopping them during shutdown and supervising them while the system is running.
Description. initctl allows a system administrator to communicate and interact with the Upstart init(8) daemon. When run as initctl, the first non-option argument is the COMMAND. Global options may be specified before or after the command. You may also create symbolic or hard links to initctl named after commands.
A colleague came up with a great solution
if ( initctl status node-App | grep start ); then
initctl stop node-App
fi
Very simple and works properly when run from Jenkins
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