Chapter 2. Deploying OpenShift sandboxed containers on bare metal

Procedure

1. Create the local volume resource. This resource must define the nodes and paths to the local volumes.

   Note

   Do not use different storage class names for the same device. Doing so creates multiple persistent volumes (PVs).

   Example: Block

   apiVersion: "local.storage.openshift.io/v1"
   kind: "LocalVolume"
   metadata:
     name: "local-disks"
     namespace: "openshift-local-storage" 

   1

   
   spec:
     nodeSelector: 

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       nodeSelectorTerms:
       - matchExpressions:
           - key: kubernetes.io/hostname
             operator: In
             values:
             - ip-10-0-136-143
             - ip-10-0-140-255
             - ip-10-0-144-180
     storageClassDevices:
       - storageClassName: "local-sc" 

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         forceWipeDevicesAndDestroyAllData: false 

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         volumeMode: Block
         devicePaths: 

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           - /path/to/device 

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   1

   The namespace where the Local Storage Operator is installed.

   2

   Optional: A node selector containing a list of nodes where the local storage volumes are attached. This example uses the node hostnames, obtained from oc get node. If a value is not defined, then the Local Storage Operator will attempt to find matching disks on all available nodes.

   3

   The name of the storage class to use when creating persistent volume objects.

   4

   This setting defines whether or not to call wipefs, which removes partition table signatures (magic strings) making the disk ready to use for Local Storage Operator provisioning. No other data besides signatures is erased. The default is "false" (wipefs is not invoked). Setting forceWipeDevicesAndDestroyAllData to "true" can be useful in scenarios where previous data can remain on disks that need to be re-used. In these scenarios, setting this field to true eliminates the need for administrators to erase the disks manually.

   5

   The path containing a list of local storage devices to choose from. You must use this path when enabling a node with a local block device to run OpenShift sandboxed containers workloads.

   6

   Replace this value with the filepath to your LocalVolume resource by-id, such as /dev/disk/by-id/wwn. PVs are created for these local disks when the provisioner is deployed successfully.

2. Create the local volume resource in your OpenShift Container Platform cluster. Specify the file you just created:

   $ oc apply -f <local-volume>.yaml

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3. Verify that the provisioner was created and that the corresponding daemon sets were created:

   $ oc get all -n openshift-local-storage

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   Example output

   NAME                                          READY   STATUS    RESTARTS   AGE
   pod/diskmaker-manager-9wzms                   1/1     Running   0          5m43s
   pod/diskmaker-manager-jgvjp                   1/1     Running   0          5m43s
   pod/diskmaker-manager-tbdsj                   1/1     Running   0          5m43s
   pod/local-storage-operator-7db4bd9f79-t6k87   1/1     Running   0          14m
   
   NAME                                     TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)             AGE
   service/local-storage-operator-metrics   ClusterIP   172.30.135.36   <none>        8383/TCP,8686/TCP   14m
   
   NAME                               DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR   AGE
   daemonset.apps/diskmaker-manager   3         3         3       3            3           <none>          5m43s
   
   NAME                                     READY   UP-TO-DATE   AVAILABLE   AGE
   deployment.apps/local-storage-operator   1/1     1            1           14m
   
   NAME                                                DESIRED   CURRENT   READY   AGE
   replicaset.apps/local-storage-operator-7db4bd9f79   1         1         1       14m

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   Note the desired and current number of daemon set processes. A desired count of 0 indicates that the label selectors were invalid.

4. Verify that the persistent volumes were created:

   $ oc get pv

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   Example output

   NAME                CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM   STORAGECLASS   REASON   AGE
   local-pv-1cec77cf   100Gi      RWO            Delete           Available           local-sc                88m
   local-pv-2ef7cd2a   100Gi      RWO            Delete           Available           local-sc                82m
   local-pv-3fa1c73    100Gi      RWO            Delete           Available           local-sc                48m

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Procedure

1. Create an nfd.yaml manifest file according to the following example:

   apiVersion: nfd.openshift.io/v1
   kind: NodeFeatureDiscovery
   metadata:
     name: nfd-kata
     namespace: openshift-nfd
   spec:
     workerConfig:
       configData: |
         sources:
           custom:
             - name: "feature.node.kubernetes.io/runtime.kata"
               matchOn:
                 - cpuId: ["SSE4", "VMX"]
                   loadedKMod: ["kvm", "kvm_intel"]
                 - cpuId: ["SSE4", "SVM"]
                   loadedKMod: ["kvm", "kvm_amd"]
   # ...

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2. Create the NodeFeatureDiscovery CR:

   $ oc create -f nfd.yaml

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   The NodeFeatureDiscovery CR applies the feature.node.kubernetes.io/runtime.kata=true label to all qualifying worker nodes.

1. Create a kata-config.yaml manifest file according to the following example:

   apiVersion: kataconfiguration.openshift.io/v1
   kind: KataConfig
   metadata:
     name: example-kataconfig
   spec:
     checkNodeEligibility: true

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2. Create the KataConfig CR:

   $ oc create -f kata-config.yaml

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