OpenStack known issues¶

This section lists the OpenStack known issues with workarounds for the Mirantis OpenStack for Kubernetes release 23.2.

[25124] MPLSoGRE encapsulation has limited throughput¶

Multiprotocol Label Switching over Generic Routing Encapsulation (MPLSoGRE) provides limited throughput while sending data between VMs up to 38 Mbps, as per Mirantis tests.

As a workaround, switch the encapsulation type to VXLAN in the OpenStackDeployment custom resource:

spec:
  services:
    networking:
      neutron:
        values:
          conf:
            bagpipe_bgp:
              dataplane_driver_ipvpn:
                mpls_over_gre: "False"
                vxlan_encap: "True"

[31186,34132] Pods get stuck during MariaDB operations¶

Due to the upstream MariaDB issue, during MariaDB operations on a management cluster, Pods may get stuck in continuous restarts with the following example error:

[ERROR] WSREP: Corrupt buffer header: \
addr: 0x7faec6f8e518, \
seqno: 3185219421952815104, \
size: 909455917, \
ctx: 0x557094f65038, \
flags: 11577. store: 49, \
type: 49

Workaround:

Create a backup of the /var/lib/mysql directory on the mariadb-server Pod.
Verify that other replicas are up and ready.
Remove the galera.cache file for the affected mariadb-server Pod.
Remove the affected mariadb-server Pod or wait until it is automatically restarted.

After Kubernetes restarts the Pod, the Pod clones the database in 1-2 minutes and restores the quorum.

[34897] Machines are not available after Victoria to Wallaby update¶

Fixed in 23.3

After update of OpenStack from Victoria to Wallaby, the machines from nodes with DPDK become unavailable.

Workaround:

Search for the nodes with the OVS ports:

for i in $(kubectl -n openstack get pods |grep openvswitch-vswitchd | awk '{print $1}'); do kubectl -n openstack exec -it -c openvswitch-vswitchd $i -- ovs-vsctl show |grep -q "tag: 4095" && echo $i; done

Restart the neutron-ovs-agent agent on the affected nodes.