Mirantis Container Cloud (MCC) becomes part of Mirantis OpenStack for Kubernetes (MOSK)!

Starting with MOSK 25.2, the MOSK documentation set covers all product layers, including MOSK management (formerly Container Cloud). This means everything you need is in one place. Some legacy names may remain in the code and documentation and will be updated in future releases. The separate Container Cloud documentation site will be retired, so please update your bookmarks for continued easy access to the latest content.

OpenStack known issues

This section lists the OpenStack known issues with workarounds for the Mirantis OpenStack for Kubernetes release 22.3.

[26278] ‘l3-agent’ gets stuck during Neutron restart

Fixed in 22.4

During l3-agent restart, routers may not be initialized properly due to erroneous logic in Neutron code causing l3-agent to get stuck in the Not ready state. The readiness probe states that one of routers is not ready with the keepalived process not started.

Example output of the kubectl -n openstack describe pod <neutron-l3 agent pod name> command:

Warning  Unhealthy  109s (x476 over 120m)  kubelet, ti-rs-nhmrmiuyqzxl-2-2obcnor6vt24-server-tmtr5ajqjflf \
Readiness probe failed: /tmp/health-probe.py:259: \
ERROR:/tmp/health-probe.py:The router: 66a885b7-0c7c-463a-a574-bdb19733baf3 is not initialized.

Workaround:

  1. Remove the router from l3-agent:

    neutron l3-agent-router-remove <router-name> <l3-agent-name>

  2. Wait up to one minute.

  3. Add the router back to l3-agent:

    neutron l3-agent-router-add <router-name> <l3-agent-name>

[25594] Security groups shared through RBAC cannot be used to create instances

Fixed in 22.5

It is not possible to create an instance that uses a security group shared through role-based access control (RBAC) with only specifying the network ID when calling Nova. In such case, before creating a port in the given network, Nova verifies if the given security group exists in Neutron. However, Nova asks only for the security groups filtered by project_id. Therefore, it will not get the shared security group back from the Neutron API. For details, see the OpenStack known issue #1942615.

Workaround:

  1. Create a port in Neutron:

    openstack port create --network <NET> --security-group <SG_ID> shared-sg-port

  2. Pass the created port to Nova:

    openstack server create --image <IMAGE> --flavor <FLAVOR> --port shared-sg-port vm-with-shared-sg

Note

If security groups shared through RBAC are used, apply them to ports only, not to instances directly.

[22930] Octavia load balancers provisioning gets stuck

Fixed in 22.4

Octavia load balancers provisioning_status may get stuck in the ERROR, PENDING_UPDATE, PENDING_CREATE, or PENDING_DELETE state. Occasionally, the listeners or pools associated with these load balancers may also get stuck in the same state.

Workaround:

  • For administrative users that have access to the keystone-client pod:

    1. Log in to a keystone-client pod.

    2. Delete the affected load balancer:

      openstack loadbalancer delete <load_balancer_id> --force

  • For non-administrative users, access the Octavia API directly and delete the affected load balancer using the "force": true argument in the delete request:

    1. Access the Octavia API.

    2. Obtain the token:

      TOKEN=$(openstack token issue -f value -c id)

    3. Obtain the endpoint:

      ENDPOINT=$(openstack version show --service load-balancer --interface public --status CURRENT -f value -c Endpoint)

    4. Delete the affected load balancers:

      curl -H "X-Auth-Token: $TOKEN" -d '{"force": true}' -X DELETE $ENDPOINT/loadbalancers/<load_balancer_id>