[MESOS-6822] CNI reports confusing error message for failed interface setup.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.1.0
• Fix Version/s: 1.6.0
• Component/s: network
• Target Version/s: 1.6.0
• Sprint: Mesosphere Sprint 73
• Story Points: 2
• Assignee: Qian Zhang
• Reporter: Alex R
• Shepherd: Jie Yu
• Created: 20/Dec/16 16:01
• Updated: 25/Jan/18 00:55
• Resolved: 25/Jan/18 00:55

Description

Saw this today:

Failed to bring up the loopback interface in the new network namespace of pid 17067: Success

which is produced by this code: https://github.com/apache/mesos/blob/1e72605e9892eb4e518442ab9c1fe2a1a1696748/src/slave/containerizer/mesos/isolators/network/cni/cni.cpp#L1854-L1859

Note that ssh'ing into the machine confirmed that ifconfig is available in PATH.

Full log: http://pastebin.com/hVdNz6yk