OpenShift v4.x – NFS PV Mount 옵션 사용

Persistence Volume(PV)를 NFS 방식으로 사용시 Mount Options은 아래와 같이 사용 가능하다.
다만, Storage Class 방식으로 사용하려면 Storage 벤더사에서 CSI(Container Storage Interface)를 지원해야 사용가능 하다.

사용가능한 옵션을 조회 한다.

[root@bastion ~]# mount -t nfs -o [tab][tab]
_netdev        acregmin=      context=       dirsync        hard           mounthost=     nfsvers=       nodev          noiversion     nostrictatime  rdirplus       retry=         sharecache     timeo=
ac             actimeo=       cto            exec           intr           mountport=     noac           nodiratime     nomand         nosuid         rdma           ro             soft           udp
acdirmax=      async          defaults       fg             iversion       mountproto=    noacl          noexec         nordirplus     nouser         relatime       rootcontext=   strictatime    user
acdirmin=      atime          defcontext=    fsc            lookupcache=   mountvers=     noatime        nofail         norelatime     owner          remount        rsize=         suid           users
acl            auto           dev            fscontext=     loop           namlen=lock    noauto         nofsc          noresvport     port=          resvport       rw             sync           vers=
acregmax=      bg             diratime       group          mand           namlen=nolock  nocto          nointr         nosharecache   proto=         retrans=       sec=           tcp            wsize=

PV 내용중 spec.mountOptions을 통해서 정의 한다.

[root@bastion ~]# vi ybkim-test-pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
  name: ybkim-pv
  labels:
    app: httpd-24
spec:
  capacity:
    storage: 100Gi
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Retain
  mountOptions:
    - vers=4.1
    - noac
    - noatime
  nfs:
    path: /data/nfs/ybkim/test
    server: 200.200.250.1
[root@bastion ~]# oc create -f ybkim-test-pv.yaml

[root@bastion ~]# vi ybkim-test-pvc.yaml
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: ybkim-test-pvc
  namespace: ybkim
  labels:
    app: httpd-24
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 100Gi
  volumeName: ybkim-pv
  volumeMode: Filesystem
[root@bastion ~]# oc create -f ybkim-test-pvc.yaml

namespace(ybkim)에 볼륨명(volume-test)과 PVC(ybkim-test-pvc)를 정의하고 Pod에서 마운트 될 경로(/mnt)를 지정 한다.

[root@bastion ~]# oc get deployment -n ybkim
NAME       READY   UP-TO-DATE   AVAILABLE   AGE
httpd-24   1/1     1            1           62m

[root@bastion ~]# oc set volumes deployment/httpd-24 \
--add --name=volume-test \
-t pvc --claim-name=ybkim-test-pvc --mount-path=/mnt \
--overwrite -n ybkim

[root@bastion ~]# oc get pod -n ybkim
NAME                        READY   STATUS    RESTARTS   AGE
httpd-24-765578d576-w42fc   1/1     Running   0          47s
[root@bastion ~]# oc exec -it httpd-24-765578d576-w42fc \
-- cat /proc/mounts | grep nfs | grep --color -E 'vers|noac|noatime'
200.200.250.1:/data/nfs/ybkim/test /mnt nfs4 rw,sync,noatime,vers=4.1,rsize=1048576,wsize=1048576,namlen=255,acregmin=0,acregmax=0,acdirmin=0,acdirmax=0,hard,noac,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=200.200.250.50,local_lock=none,addr=200.200.250.1 0 0

Deployment에서 마운트 된 Volume을 삭제할 경우 수행.

[root@bastion ~]# oc set volumes deployment/httpd-24 --remove --name=volume-test -n ybkim

[1]: Manpage: NFS
[2]: Kubernetes: Persistent Volumes
[3]: OpenShift Docs: Persistent Volume API
[4]: RedHat Knowledge Base: Edit options for persistent volume and storage class mounts in OCP 4
[5]: OpenShift Docs: CSI drivers supported by OpenShift Container Platform

끝.