[YARN-8027] Setting hostname of docker container breaks for --net=host in docker 1.13

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.1.0, 3.0.3
• Component/s: yarn
• Labels: Docker
• Hadoop Flags: Reviewed
• Assignee: Jim Brennan
• Reporter: Jim Brennan
• Created: 12/Mar/18 21:56
• Updated: 17/Aug/18 00:46
• Resolved: 12/Apr/18 21:06

Description

In DockerLinuxContainerRuntime:launchContainer, we are adding the --hostname argument to the docker run command to set the hostname in the container to something like:  ctr-e84-1520889172376-0001-01-000001.

This does not work when combined with the --net=host command line option in Docker 1.13.1. It causes multiple failures when the client tries to resolve the hostname and it fails.

We haven't seen this before because we were using docker 1.12.6 which seems to ignore --hostname when you are using --net=host.

Issue Links

• is caused by: YARN-6804 Allow custom hostname for docker containers in native services
• relates to: YARN-8675 Setting hostname of docker container breaks with "host" networking mode for Apps which do not run as a YARN service