CODEWITHSUNDEEP
dockercloud-foundryswisscomdevappcloud
jz22
jz22

Reputation: 2638

Docker container crashes after execution of python script

After deploying a Python Docker container and successfully executing a script the container crashes and restarts in a loop after showing the following error message:

2017-06-19 13:22:49 [APP/PROC/WEB/0] OUT Exit status 0
2017-06-19 13:22:49 [CELL/0] OUT Exit status 0
2017-06-19 13:22:49 [CELL/0] OUT Destroying container
2017-06-19 13:22:49 [API/0] OUT Process has crashed with type: "web"
2017-06-19 13:22:49 [API/0] OUT App instance exited with guid 85e7922e-5a0c-4430-994a-324e5abc0c14 payload: {"instance"=>"", "index"=>0, "reason"=>"CRASHED", "exit_description"=>"2 error(s) occurred:\n\n* Codependent step exited\n* cancelled", "crash_count"=>1, "crash_timestamp"=>1497871369566402154, "version"=>"b9800e3a-b057-4cc5-b7e4-c01f9b3c6594"}

Executing the same docker image locally it does not throw any errors. The Python script I execute is doing a simple print command and I even implemented a handler for the SIGTERM signal that is sent into the container after execution.

Upvotes: 1

Views: 1405

Answers (1)

Sandro Mathys
Sandro Mathys

Reputation: 474

In CF, applications are not supposed to finish. But if your script only just prints something, it'll perform an exit 0 afterwards. Thus the app container is stopped and CF registers a "crash", and will then restart the application in accordance with the app lifecycle: https://docs.cloudfoundry.org/devguide/deploy-apps/app-lifecycle.html

Upvotes: 3

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