A little script for keeping very long running jobs online in Travis CI.
I run some complicated Packer builds to build AMIs in EC2. It can often take more than 10 minutes for Amazon
to assemble a simple AMI image. I also run Packer builds to test changes in pull requests and then use custom logic to
tear down the built AMIs until merged to
This script allows my Packer Travis builds to run as long as necessary.
As described in Travis CI documentation, if a Travis CI build goes longer than 10 minutes without emitting
any output, the build is killed by Travis. "It's okay," Travis docs tell us, "you can use the
travis_wait command for
long running builds."
Here are a few problems with
- It displays no output at all until the task has completed, and for long running builds, this is a deal breaker. If
one test case failed pretty early on in your build, you'll have to wait until the end of the build to see what went
- It isn't available in your deploy scripts, which still have the 10 minute timeout.
A janky Python script which executes any command and arguments passed to it, sending output directly to standard output and error, sending out the following message (by default) every nine minutes to rustle Travis' jimmies:
It works. Your builds will now stream your output back to you and will only time out after an hour. If you truly need
something that never ever times out, the
--max-timeout flag can be set to
0, which will cause your build to
last forever. Please don't use this unless you have a paid Travis CI account.
usage: travis-pls [-h] [-i INTERVAL] [-m MAX_TIMEOUT] command ... Periodically disturbs Travis to allow long-running builds with stalled output. positional arguments: command The command to run. args Arguments for the command. optional arguments: -h, --help show this help message and exit -i INTERVAL, --interval INTERVAL Disturbance interval. -m MAX_TIMEOUT, --max-timeout MAX_TIMEOUT The maximum allowed run time in order to be a good internet citizen.
travis-pls will time out after one hour of execution, and will interrupt every 9 minutes to keep the