Fluentd stopped collecting logs after upgrade to RHEL 7.4
Issue
After upgrading to RHEL 7.4, Fluentd pods are showing the following error and no logs are sent to Elasticsearch:
umount: /var/lib/docker/containers/02f45678b6251443d593d5e94c5a5647d8c64f44399f45288cc9237d50872630/shm: not mounted
Environment
- OpenShift 3.4 and later
- RHEL 7.4
- Docker 1.12.6
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