After upgrading Overcloud MTU of amphora's mgmt network in Octavia is randomly changed from MTU 8950 to 1500
Issue
- Suddenly after upgrade some loadbalancers ended up in error state.
- Failing loadbalancer over didn't fix anything. The loadbalancer ended up in
pending_updatestate and some amphora instances went inerrorstate. - After upgrading Overcloud to OSP 16.2.2-16.2.6, Octavia loadbalancers ended up in error state.
- Octavia management network interface o-hm0 randomly changed from a configured jumbo frame supported MTU of 8950 to 1500.
Environment
- Red Hat OpenStack Platform 16.2.2,16.2.6
- Red Hat OpenStack Platform 17.1
- Jumbo Frame supported
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