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Arctera InfoScale™ for Kubernetes 8.0.400 - Linux

Last Published: 2025-02-25

Product(s): InfoScale & Storage Foundation (8.0.400)

Platform: Linux

Configuring Arctera Oracle Data Manager (VRTSodm)

Arctera Oracle Data Manager (VRTSodm) is offered as a part of InfoScale suite. With VRTSodm, Oracle Applications bypass caching and locks of the file system thus enabling a faster connection.

VRTSodm is enabled by the linking libodm.so with the Oracle Application. The I/O calls from Oracle Application are then routed through the ODM kernel module.

Following changes are needed to the Oracle database yaml file to enable it to run with Arctera ODM:

Update the VxFS Data Volume (<vxfs pvc>) in the following code and add it to the .yaml.
Note:
Oracle Container image requires the data volume to be mounted at /opt/oracle/oradata. This volume also needs to be writable by the 'oracle' (uid: 54321) user inside the container. VxFS data volume must be mounted at this path by using a PVC. To handle this permissions issue, the following initContainer can be used.
```
initContainers:
- name: fix-volume-permission
  image: ubuntu
  command:
  - sh
  - -c
  - mkdir -p /opt/oracle/oradata 
    && chown -R 54321:54321 /opt/oracle/oradata 
    && chmod 0700 /opt/oracle/oradata
  volumeMounts:
  - name: <vxfs pvc>
  mountPath: /opt/oracle/oradata
  readOnly: false
```

Add the following to your .yaml to disable DNFS.

args:
- sh
- -c
- cd /opt/oracle/product/19c/dbhome_1/rdbms/lib/ &&
 make -f ins_rdbms.mk dnfs_off && cd $WORKDIR &&
 $ORACLE_BASE/$RUN_FILE

Create a hostpath volume devodm in the .yaml, and mount at /dev/odm.
Note:
On selinux-enabled systems (including OpenShift), the Oracle database container must be run as privileged.
Use the libodm.so that Arctera provides. Run the following commands on the bastion/master nodes.
- oc/kubectl cp <infoscalepod>:/opt/VRTSodm/lib64/libodm.so.
- oc/kubectl create configmap libodm --from-file libodm.so.
- Mount libodm.so inside the oracle container as under:
```
- name: libodm-cmapvol
  mountPath: /opt/oracle/product/19c/dbhome_1/rdbms/lib/odm/libodm.so
  subPath: libodm.so

volumes:
- name: libodm-cmapvol
  configMap:
    name: libodm
    items:
    - key: libodm.so
      path: libodm.so
```

Run your .yaml on the bastion mode of the OpenShift cluster or the master node of the Kubernetes cluster.

Alternatively, copy the following content and create a new file oracle-odm.yaml.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: oracle-odm
  labels:
    app: oracledb
spec:
  replicas: 1
  selector:
    matchLabels:
      app: oracledb
  template:
    metadata:
      labels:
        app: oracledb
    spec:
      initContainers:
      - name: fix-volume-permission
        image: ubuntu
        command:
        - sh
        - -c
        - mkdir -p /opt/oracle/oradata && chown -R 54321:54321 
          /opt/oracle/oradata && chmod 0700 /opt/oracle/oradata 
        volumeMounts:
        - name: oracle-datavol
          mountPath: /opt/oracle/oradata
          readOnly: false
      containers:
      - name: oracle-app
        securityContext:
          privileged: true
        image:#replace this with the link for patched oracle container image
        imagePullPolicy: IfNotPresent
        # Modification to the args to disable dnfs before starting database
        args:
        - sh
        - -c
        - cd /opt/oracle/product/19c/dbhome_1/rdbms/lib/ && make -f 
             ins_rdbms.mk dnfs_off && cd $WORKDIR && $ORACLE_BASE/$RUN_FILE
        resources:
          requests:
            memory: 8Gi
        env:
        - name: ORACLE_SID
          value: "orainst1"
        - name: ORACLE_PDB
          value: orapdb1
        - name: ORACLE_PWD
          value: oracle
        ports:
        - name: listener
          containerPort: 1521
          hostPort: 1521
        volumeMounts:
        - name: oracle-datavol
          mountPath: /opt/oracle/oradata
          readOnly: false
        - name: devodm
          mountPath: /dev/odm
        - name: libodm-cmapvol
         mountPath: /opt/oracle/product/19c/dbhome_1/rdbms/lib/odm/libodm.so
          subPath: libodm.so
      volumes:
      - name: oracle-datavol
        persistentVolumeClaim:
          claimName: oracle-data-pvc
      - name: devodm
        hostPath:
          path: /dev/odm
          type: Directory
      - name: libodm-cmapvol
        configMap:
          name: libodm
          items:
          - key: libodm.so
            path: libodm.so
---
apiVersion: v1
kind: Service
metadata:
  name: ora-listener
  namespace: default
  labels:
    app: oracledb
spec:
  selector:
    app: oracledb
  type: NodePort
  ports:
  - name: ora-listener
    protocol: TCP
    port: 1521
    targetPort: 1521

Save the file.

Run the file on the bastion mode of the OpenShift cluster or the master node of the Kubernetes cluster to enable a faster connection.