[MESOS-1740] Bad error message when docker containerizer isn't enabled

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.20.1
• Component/s: containerization
• Labels: docker
• Target Version/s: 0.20.1
• Assignee: Timothy Chen
• Reporter: Jay Buffington
• Created: 27/Aug/14 20:04
• Updated: 17/Nov/15 12:44
• Resolved: 11/Sep/14 19:01

Description

If I set container in TaskInfo's executor (aka DockerInfo) but I do not start the slave with --containerizer=docker,... then I get this error message in the log:

E0827 17:53:16.422735 20090 slave.cpp:2491] Container 'xxx' for executor 'yyy' of framework 'zzz' failed to start: TaskInfo/ExecutorInfo not supported

A better error message would have been:

No enabled containerizers could create a container for the provided TaskInfo/ExecutorInfo message.  Enabled containerizers are: mesos.

An even better error message would have been:

DockerInfo was sent, but docker containerizer is not enabled.  Try adding --containerizer=docker,... to command line args