The rabbitmq chart requests a 256Mi PV for operational storage. With
CentOS 7.5 and 7.6 kernels, a jbd2 kernel thread hang is observed after
a long soak period. Once this occurs, a host reboot is required to
recover access to the PV.
We have been able to reliably recreate this using the stock upstream
CentOS 7.6 kernel and the latest Ceph Jewel LTS (10.2.11) version using
fsstress. This is currently pointing to a race condition in the
With a reliable test available for this, other scenarios to characterize
this have been performed including using different volume sizes and
using different ext4 filesystem formatting options.
We've been unable to cause the hang using a 1Gi PV over an extended soak
period so we'll update the stx-openstack manifest to request a 1Gi PV
until the root cause and fix has been addressed in the kernel.
Signed-off-by: Robert Church <email@example.com>