Verifying the Multus networking

Verify that the Multus networking in configured in your Fusion Data Foundation cluster.

About this task

Based on your network configuration choices, the Fusion Data Foundation operator will do one of the following:

If only a single NetworkAttachmentDefinition (for example, ocs-public-cluster) was selected for the Public Network Interface, then the traffic between the application pods and the Fusion Data Foundation cluster will happen on this network. Additionally the cluster will be self configured to also use this network for the replication and rebalancing traffic between OSDs.
If both NetworkAttachmentDefinitions (for example, ocs-public and ocs-cluster) were selected for the Public Network Interface and the Cluster Network Interface respectively during the Storage Cluster installation, then client storage traffic will be on the public network and cluster network for the replication and rebalancing traffic between OSDs.

To verify the network configuration is correct, complete the following:

Procedure

In the Red Hat® OpenShift® Container Platform web console, go to Storage > Data Foundation > Storage System.
From the Action menu, select Edit Storage System.

In the YAML tab, search for network in the spec section and ensure the configuration is correct for your network interface choices.

This example is for separating the client storage traffic from the storage replication traffic.

Sample output:

[..]
spec:
  [..]
  network:
    ipFamily: IPv4
    provider: multus
    selectors:
      cluster: openshift-storage/ocs-cluster
      public: openshift-storage/ocs-public
  [..]

To verify the network configuration is correct using the command line interface, run the following commands:

oc get storagecluster ocs-storagecluster \
-n openshift-storage \
-o=jsonpath='{.spec.network}{"\n"}'

Sample output:

{"ipFamily":"IPv4","provider":"multus","selectors":{"cluster":"openshift-storage/ocs-cluster","public":"openshift-storage/ocs-public"}}

Confirm the OSD pods are using correct network.

In the openshift-storage namespace use one of the OSD pods to verify the pod has connectivity to the correct networks.

Note: Only the OSD pods will connect to both Multus public and cluster networks if both are created. All other OCS pods will connect to the Multus public network.

This example is for separating the client storage traffic from the storage replication traffic.

oc get -n openshift-storage $(oc get pods -n openshift-storage -o name -l app=rook-ceph-osd | grep 'osd-0') -o=jsonpath='{.metadata.annotations.k8s\.v1\.cni\.cncf\.io/network-status}{"\n"}'

Sample output:

[{
    "name": "openshift-sdn",
    "interface": "eth0",
    "ips": [
        "10.129.2.30"
    ],
    "default": true,
    "dns": {}
},{
    "name": "openshift-storage/ocs-cluster",
    "interface": "net1",
    "ips": [
        "192.168.2.1"
    ],
    "mac": "e2:04:c6:81:52:f1",
    "dns": {}
},{
    "name": "openshift-storage/ocs-public",
    "interface": "net2",
    "ips": [
        "192.168.1.1"
    ],
    "mac": "ee:a0:b6:a4:07:94",
    "dns": {}
}]

To confirm the OSD pods are using correct network using the command line interface, run the following command (requires the jq utility):

oc get -n openshift-storage $(oc get pods -n openshift-storage -o name -l app=rook-ceph-osd | grep 'osd-0') -o=jsonpath='{.metadata.annotations.k8s\.v1\.cni\.cncf\.io/network-status}{"\n"}' | jq -r '.[].name'

Sample output:

openshift-sdn
openshift-storage/ocs-cluster
openshift-storage/ocs-public