Tungsten Fabric known issues and limitations¶
This section lists the Tungsten Fabric known issues with workarounds for the Mirantis OpenStack for Kubernetes release 21.2.
Tungsten Fabric does not provide the following functionality:
Automatic generation of network port records in DNSaaS (Designate) as Neutron with Tungsten Fabric as a back end is not integrated with DNSaaS. As a workaround, you can use the Tungsten Fabric built-in DNS service that enables virtual machines to resolve each other names.
Secret management (Barbican). You cannot use the certificates stored in Barbican to terminate HTTPs in a load balancer.
Role Based Access Control (RBAC) for Neutron objects.
Modification of custom vRouter DaemonSets based on the SR-IOV definition in the
 tf-control does not refresh IP addresses of Cassandra pods¶
tf-control service resolves the DNS names of Cassandra pods at startup
and does not update them if Cassandra pods got new IP addresses, for example,
in case of a restart. As a workaround, to refresh the IP addresses of
Cassandra pods, restart the
tf-control pods one by one:
Before restarting the
Verify that the new pods are successfully spawned.
Verify that no vRouters are connected to only one
tf-controlpod that will be restarted.
kubectl -n tf delete pod tf-control-<hash>
 TF pods switch to CrashLoopBackOff after a simultaneous reboot¶
Rebooting all Cassandra cluster
maintenance, or other circumstances that cause the Cassandra pods to
start simultaneously may cause a broken Cassandra
TFAnalytics cluster. In this case, Cassandra nodes do not join the
ring and do not update the IPs of the neighbor nodes. As a result, the
TF services cannot operate Cassandra cluster(s).
To verify that a Cassandra cluster is affected:
Run the nodetool status command specifying the
analytics cluster and the replica number:
kubectl -n tf exec -it tf-cassandra-<config/analytics>-dc1-rack1-<replica number> -c cassandra -- nodetool status
Example of system response with outdated IP addresses:
Datacenter: DC1 =============== Status=Up/Down |/ State=Normal/Leaving/Joining/Moving -- Address Load Tokens Owns (effective) Host ID Rack DN <outdated ip> ? 256 64.9% a58343d0-1e3f-4d54-bcdf-9b9b949ca873 r1 DN <outdated ip> ? 256 69.8% 67f1d07c-8b13-4482-a2f1-77fa34e90d48 r1 Datacenter: dc1 =============== Status=Up/Down |/ State=Normal/Leaving/Joining/Moving -- Address Load Tokens Owns (effective) Host ID Rack UN <actual ip> 3.84 GiB 256 65.2% 7324ebc4-577a-425f-b3de-96faac95a331 rack1
Manually delete a Cassandra pod from the failed
cluster to re-initiate the bootstrap process for one of the Cassandra nodes:
kubectl -n tf delete pod tf-cassandra-<config/analytics>-dc1-rack1-<replica number>