Procedure

1. Use the oc adm command to extract the image URL of the driver-toolkit corresponding to a certain release:

   • For an x86 image, enter the following command:

     $ oc adm release info quay.io/openshift-release-dev/ocp-release:4.12.z-x86_64 --image-for=driver-toolkit

   • For an ARM image, enter the following command:

     $ oc adm release info quay.io/openshift-release-dev/ocp-release:4.12.z-aarch64 --image-for=driver-toolkit

   Example output

   quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:0fd84aee79606178b6561ac71f8540f404d518ae5deff45f6d6ac8f02636c7f4

2. Obtain this image by using a valid pull secret, such as the pull secret required to install OpenShift Container Platform:

   $ podman pull --authfile=path/to/pullsecret.json quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:<SHA>

1. The YAML defines an ImageStream for storing the simple-kmod driver container image, and a BuildConfig for building the container. Save this YAML as 0000-buildconfig.yaml.template.

   apiVersion: image.openshift.io/v1
   kind: ImageStream
   metadata:
     labels:
       app: simple-kmod-driver-container
     name: simple-kmod-driver-container
     namespace: simple-kmod-demo
   spec: {}
   ---
   apiVersion: build.openshift.io/v1
   kind: BuildConfig
   metadata:
     labels:
       app: simple-kmod-driver-build
     name: simple-kmod-driver-build
     namespace: simple-kmod-demo
   spec:
     nodeSelector:
       node-role.kubernetes.io/worker: ""
     runPolicy: "Serial"
     triggers:
       - type: "ConfigChange"
       - type: "ImageChange"
     source:
       dockerfile: |
         ARG DTK
         FROM ${DTK} as builder
   
         ARG KVER
   
         WORKDIR /build/
   
         RUN git clone https://github.com/openshift-psap/simple-kmod.git
   
         WORKDIR /build/simple-kmod
   
         RUN make all install KVER=${KVER}
   
         FROM registry.redhat.io/ubi8/ubi-minimal
   
         ARG KVER
   
         # Required for installing `modprobe`
         RUN microdnf install kmod
   
         COPY --from=builder /lib/modules/${KVER}/simple-kmod.ko /lib/modules/${KVER}/
         COPY --from=builder /lib/modules/${KVER}/simple-procfs-kmod.ko /lib/modules/${KVER}/
         RUN depmod ${KVER}
     strategy:
       dockerStrategy:
         buildArgs:
           - name: KMODVER
             value: DEMO
             # $ oc adm release info quay.io/openshift-release-dev/ocp-release:<cluster version>-x86_64 --image-for=driver-toolkit
           - name: DTK
             value: quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:34864ccd2f4b6e385705a730864c04a40908e57acede44457a783d739e377cae
           - name: KVER
             value: 4.18.0-372.26.1.el8_6.x86_64
     output:
       to:
         kind: ImageStreamTag
         name: simple-kmod-driver-container:demo

2. Substitute the correct driver toolkit image for the OpenShift Container Platform version you are running in place of “DRIVER_TOOLKIT_IMAGE” with the following commands.

   $ OCP_VERSION=$(oc get clusterversion/version -ojsonpath={.status.desired.version})

   $ DRIVER_TOOLKIT_IMAGE=$(oc adm release info $OCP_VERSION --image-for=driver-toolkit)

   $ sed "s#DRIVER_TOOLKIT_IMAGE#${DRIVER_TOOLKIT_IMAGE}#" 0000-buildconfig.yaml.template > 0000-buildconfig.yaml

3. Create the image stream and build config with

   $ oc create -f 0000-buildconfig.yaml

4. After the builder pod completes successfully, deploy the driver container image as a DaemonSet.

   1. The driver container must run with the privileged security context in order to load the kernel modules on the host. The following YAML file contains the RBAC rules and the DaemonSet for running the driver container. Save this YAML as 1000-drivercontainer.yaml.

      apiVersion: v1
      kind: ServiceAccount
      metadata:
        name: simple-kmod-driver-container
      ---
      apiVersion: rbac.authorization.k8s.io/v1
      kind: Role
      metadata:
        name: simple-kmod-driver-container
      rules:
      - apiGroups:
        - security.openshift.io
        resources:
        - securitycontextconstraints
        verbs:
        - use
        resourceNames:
        - privileged
      ---
      apiVersion: rbac.authorization.k8s.io/v1
      kind: RoleBinding
      metadata:
        name: simple-kmod-driver-container
      roleRef:
        apiGroup: rbac.authorization.k8s.io
        kind: Role
        name: simple-kmod-driver-container
      subjects:
      - kind: ServiceAccount
        name: simple-kmod-driver-container
      userNames:
      - system:serviceaccount:simple-kmod-demo:simple-kmod-driver-container
      ---
      apiVersion: apps/v1
      kind: DaemonSet
      metadata:
        name: simple-kmod-driver-container
      spec:
        selector:
          matchLabels:
            app: simple-kmod-driver-container
        template:
          metadata:
            labels:
              app: simple-kmod-driver-container
          spec:
            serviceAccount: simple-kmod-driver-container
            serviceAccountName: simple-kmod-driver-container
            containers:
            - image: image-registry.openshift-image-registry.svc:5000/simple-kmod-demo/simple-kmod-driver-container:demo
              name: simple-kmod-driver-container
              imagePullPolicy: Always
              command: [sleep, infinity]
              lifecycle:
                postStart:
                  exec:
                    command: ["modprobe", "-v", "-a" , "simple-kmod", "simple-procfs-kmod"]
                preStop:
                  exec:
                    command: ["modprobe", "-r", "-a" , "simple-kmod", "simple-procfs-kmod"]
              securityContext:
                privileged: true
            nodeSelector:
              node-role.kubernetes.io/worker: ""

   2. Create the RBAC rules and daemon set:

      $ oc create -f 1000-drivercontainer.yaml

5. After the pods are running on the worker nodes, verify that the simple_kmod kernel module is loaded successfully on the host machines with lsmod.

   1. Verify that the pods are running:

      $ oc get pod -n simple-kmod-demo

      Example output

      NAME                                 READY   STATUS      RESTARTS   AGE
      simple-kmod-driver-build-1-build     0/1     Completed   0          6m
      simple-kmod-driver-container-b22fd   1/1     Running     0          40s
      simple-kmod-driver-container-jz9vn   1/1     Running     0          40s
      simple-kmod-driver-container-p45cc   1/1     Running     0          40s

   2. Execute the lsmod command in the driver container pod:

      $ oc exec -it pod/simple-kmod-driver-container-p45cc -- lsmod | grep simple

      Example output

      simple_procfs_kmod     16384  0
      simple_kmod            16384  0

Procedure

1. Create a namespace for the NFD Operator.

   1. Create the following Namespace custom resource (CR) that defines the openshift-nfd namespace, and then save the YAML in the nfd-namespace.yaml file:

      apiVersion: v1
      kind: Namespace
      metadata:
        name: openshift-nfd

   2. Create the namespace by running the following command:

      $ oc create -f nfd-namespace.yaml

2. Install the NFD Operator in the namespace you created in the previous step by creating the following objects:

   1. Create the following OperatorGroup CR and save the YAML in the nfd-operatorgroup.yaml file:

      apiVersion: operators.coreos.com/v1
      kind: OperatorGroup
      metadata:
        generateName: openshift-nfd-
        name: openshift-nfd
        namespace: openshift-nfd
      spec:
        targetNamespaces:
        - openshift-nfd

   2. Create the OperatorGroup CR by running the following command:

      $ oc create -f nfd-operatorgroup.yaml

   3. Create the following Subscription CR and save the YAML in the nfd-sub.yaml file:

      Example Subscription

      apiVersion: operators.coreos.com/v1alpha1
      kind: Subscription
      metadata:
        name: nfd
        namespace: openshift-nfd
      spec:
        channel: "stable"
        installPlanApproval: Automatic
        name: nfd
        source: redhat-operators
        sourceNamespace: openshift-marketplace

   4. Create the subscription object by running the following command:

      $ oc create -f nfd-sub.yaml

   5. Change to the openshift-nfd project:

      $ oc project openshift-nfd

Procedure

1. In the OpenShift Container Platform web console, click Operators → OperatorHub.
2. Choose Node Feature Discovery from the list of available Operators, and then click Install.
3. On the Install Operator page, select A specific namespace on the cluster, and then click Install. You do not need to create a namespace because it is created for you.

1. Navigate to the Operators → Installed Operators page.

2. Ensure that Node Feature Discovery is listed in the openshift-nfd project with a Status of InstallSucceeded.

   Note

   During installation an Operator might display a Failed status. If the installation later succeeds with an InstallSucceeded message, you can ignore the Failed message.

1. Navigate to the Operators → Installed Operators page and inspect the Operator Subscriptions and Install Plans tabs for any failure or errors under Status.
2. Navigate to the Workloads → Pods page and check the logs for pods in the openshift-nfd project.

Procedure

1. Create the following NodeFeatureDiscovery Custom Resource (CR), and then save the YAML in the NodeFeatureDiscovery.yaml file:

   apiVersion: nfd.openshift.io/v1
   kind: NodeFeatureDiscovery
   metadata:
     name: nfd-instance
     namespace: openshift-nfd
   spec:
     instance: "" # instance is empty by default
     topologyupdater: false # False by default
     operand:
       image: registry.redhat.io/openshift4/ose-node-feature-discovery:v4.12
       imagePullPolicy: Always
     workerConfig:
       configData: |
         core:
         #  labelWhiteList:
         #  noPublish: false
           sleepInterval: 60s
         #  sources: [all]
         #  klog:
         #    addDirHeader: false
         #    alsologtostderr: false
         #    logBacktraceAt:
         #    logtostderr: true
         #    skipHeaders: false
         #    stderrthreshold: 2
         #    v: 0
         #    vmodule:
         ##   NOTE: the following options are not dynamically run-time configurable
         ##         and require a nfd-worker restart to take effect after being changed
         #    logDir:
         #    logFile:
         #    logFileMaxSize: 1800
         #    skipLogHeaders: false
         sources:
           cpu:
             cpuid:
         #     NOTE: whitelist has priority over blacklist
               attributeBlacklist:
                 - "BMI1"
                 - "BMI2"
                 - "CLMUL"
                 - "CMOV"
                 - "CX16"
                 - "ERMS"
                 - "F16C"
                 - "HTT"
                 - "LZCNT"
                 - "MMX"
                 - "MMXEXT"
                 - "NX"
                 - "POPCNT"
                 - "RDRAND"
                 - "RDSEED"
                 - "RDTSCP"
                 - "SGX"
                 - "SSE"
                 - "SSE2"
                 - "SSE3"
                 - "SSE4.1"
                 - "SSE4.2"
                 - "SSSE3"
               attributeWhitelist:
           kernel:
             kconfigFile: "/path/to/kconfig"
             configOpts:
               - "NO_HZ"
               - "X86"
               - "DMI"
           pci:
             deviceClassWhitelist:
               - "0200"
               - "03"
               - "12"
             deviceLabelFields:
               - "class"
     customConfig:
       configData: |
             - name: "more.kernel.features"
               matchOn:
               - loadedKMod: ["example_kmod3"]

1. Create the NodeFeatureDiscovery CR instance by running the following command:

   $ oc create -f NodeFeatureDiscovery.yaml

Procedure

1. Navigate to the Operators → Installed Operators page.
2. Find Node Feature Discovery and see a box under Provided APIs.
3. Click Create instance.
4. Edit the values of the NodeFeatureDiscovery CR.
5. Click Create.

Procedure

1. Log in to the OpenShift Container Platform web console.

2. Install the Kernel Module Management Operator:

   1. In the OpenShift Container Platform web console, click Operators → OperatorHub.
   2. Select Kernel Module Management Operator from the list of available Operators, and then click Install.
   3. On the Install Operator page, select the Installation mode as A specific namespace on the cluster.
   4. From the Installed Namespace list, select the openshift-kmm namespace.
   5. Click Install.

1. Navigate to the Operators → Installed Operators page.

2. Ensure that Kernel Module Management Operator is listed in the openshift-kmm project with a Status of InstallSucceeded.

   Note

   During installation, an Operator might display a Failed status. If the installation later succeeds with an InstallSucceeded message, you can ignore the Failed message.

Troubleshooting

1. To troubleshoot issues with Operator installation:

   1. Navigate to the Operators → Installed Operators page and inspect the Operator Subscriptions and Install Plans tabs for any failure or errors under Status.
   2. Navigate to the Workloads → Pods page and check the logs for pods in the openshift-kmm project.

Procedure

1. Install KMM in the openshift-kmm namespace:

   1. Create the following Namespace CR and save the YAML file, for example, kmm-namespace.yaml:

      apiVersion: v1
      kind: Namespace
      metadata:
        name: openshift-kmm

   2. Create the following OperatorGroup CR and save the YAML file, for example, kmm-op-group.yaml:

      apiVersion: operators.coreos.com/v1
      kind: OperatorGroup
      metadata:
        name: kernel-module-management
        namespace: openshift-kmm

   3. Create the following Subscription CR and save the YAML file, for example, kmm-sub.yaml:

      apiVersion: operators.coreos.com/v1alpha1
      kind: Subscription
      metadata:
        name: kernel-module-management
        namespace: openshift-kmm
      spec:
        channel: release-1.0
        installPlanApproval: Automatic
        name: kernel-module-management
        source: redhat-operators
        sourceNamespace: openshift-marketplace
        startingCSV: kernel-module-management.v1.0.0

   4. Create the subscription object by running the following command:

      $ oc create -f kmm-sub.yaml

Procedure

1. Install KMM in the openshift-kmm namespace:

   1. Create the following Namespace CR and save the YAML file, for example, kmm-namespace.yaml file:

      apiVersion: v1
      kind: Namespace
      metadata:
        name: openshift-kmm

   2. Create the following SecurityContextConstraint object and save the YAML file, for example, kmm-security-constraint.yaml:

      allowHostDirVolumePlugin: false
      allowHostIPC: false
      allowHostNetwork: false
      allowHostPID: false
      allowHostPorts: false
      allowPrivilegeEscalation: false
      allowPrivilegedContainer: false
      allowedCapabilities:
        - NET_BIND_SERVICE
      apiVersion: security.openshift.io/v1
      defaultAddCapabilities: null
      fsGroup:
        type: MustRunAs
      groups: []
      kind: SecurityContextConstraints
      metadata:
        name: restricted-v2
      priority: null
      readOnlyRootFilesystem: false
      requiredDropCapabilities:
        - ALL
      runAsUser:
        type: MustRunAsRange
      seLinuxContext:
        type: MustRunAs
      seccompProfiles:
        - runtime/default
      supplementalGroups:
        type: RunAsAny
      users: []
      volumes:
        - configMap
        - downwardAPI
        - emptyDir
        - persistentVolumeClaim
        - projected
        - secret

   3. Bind the SecurityContextConstraint object to the Operator’s ServiceAccount by running the following commands:

      $ oc apply -f kmm-security-constraint.yaml

      $ oc adm policy add-scc-to-user kmm-security-constraint -z kmm-operator-controller-manager -n openshift-kmm

   4. Create the following OperatorGroup CR and save the YAML file, for example, kmm-op-group.yaml:

      apiVersion: operators.coreos.com/v1
      kind: OperatorGroup
      metadata:
        name: kernel-module-management
        namespace: openshift-kmm

   5. Create the following Subscription CR and save the YAML file, for example, kmm-sub.yaml:

      apiVersion: operators.coreos.com/v1alpha1
      kind: Subscription
      metadata:
        name: kernel-module-management
        namespace: openshift-kmm
      spec:
        channel: release-1.0
        installPlanApproval: Automatic
        name: kernel-module-management
        source: redhat-operators
        sourceNamespace: openshift-marketplace
        startingCSV: kernel-module-management.v1.0.0

   6. Create the subscription object by running the following command:

      $ oc create -f kmm-sub.yaml

1. List all nodes matching .spec.selector.
2. Build a set of all kernel versions running on those nodes.

3. For each kernel version:

   1. Go through .spec.moduleLoader.container.kernelMappings and find the appropriate container image name. If the kernel mapping has build or sign defined and the container image does not already exist, run the build, the signing job, or both, as needed.
   2. Create a module loader daemon set with the container image determined in the previous step.
   3. If .spec.devicePlugin is defined, create a device plugin daemon set using the configuration specified under .spec.devicePlugin.container.

4. Run garbage-collect on:

   1. Existing daemon set resources targeting kernel versions that are not run by any node in the cluster.
   2. Successful build jobs.
   3. Successful signing jobs.

Procedure

1. To generate modules.dep and .map files for a specific kernel version, run depmod -b /opt ${KERNEL_VERSION}.

1. Build the kernel modules.
2. Copy the .ko files into a smaller end-user image such as ubi-minimal.

3. To leverage DTK in your in-cluster build, use the DTK_AUTO build argument. The value is automatically set by KMM when creating the Build resource. See the following example.

   ARG DTK_AUTO
   FROM ${DTK_AUTO} as builder
   ARG KERNEL_VERSION
   WORKDIR /usr/src
   RUN ["git", "clone", "https://github.com/rh-ecosystem-edge/kernel-module-management.git"]
   WORKDIR /usr/src/kernel-module-management/ci/kmm-kmod
   RUN KERNEL_SRC_DIR=/lib/modules/${KERNEL_VERSION}/build make all
   FROM registry.redhat.io/ubi8/ubi-minimal
   ARG KERNEL_VERSION
   RUN microdnf install kmod
   COPY --from=builder /usr/src/kernel-module-management/ci/kmm-kmod/kmm_ci_a.ko /opt/lib/modules/${KERNEL_VERSION}/
   COPY --from=builder /usr/src/kernel-module-management/ci/kmm-kmod/kmm_ci_b.ko /opt/lib/modules/${KERNEL_VERSION}/
   RUN depmod -b /opt ${KERNEL_VERSION}

Procedure

1. Check to ensure the public key secret is set correctly:

   $ oc get secret -o yaml <certificate secret name> | awk '/cert/{print $2; exit}' | base64 -d  | openssl x509 -inform der -text

   This should display a certificate with a Serial Number, Issuer, Subject, and more.

2. Check to ensure the private key secret is set correctly:

   $ oc get secret -o yaml <private key secret name> | awk '/key/{print $2; exit}' | base64 -d

   This should display the key enclosed in the -----BEGIN PRIVATE KEY----- and -----END PRIVATE KEY----- lines.

Procedure

1. Use the Machine Config Operator to create a MachineConfig custom resource (CR) that contains the /var/lib/firmware path:

   apiVersion: machineconfiguration.openshift.io/v1
   kind: MachineConfig
   metadata:
     labels:
       machineconfiguration.openshift.io/role: worker 1
     name: 99-worker-kernel-args-firmware-path
   spec:
     kernelArguments:
       - 'firmware_class.path=/var/lib/firmware'

   1

   You can configure the label based on your needs. In the case of single-node OpenShift, use either control-pane or master objects.

2. By applying the MachineConfig CR, the nodes are automatically rebooted.