如何在crunchydata postgres操作符中使用nfs存储

Question

我正在试用CrunchyData postgres-操作符(Helm)和NFS Helm图表。我无法使用NFS创建集群。执行以下配置：

安装NFS舵机图表回购

helm install nfs-abc stable/nfs-server-provisioner

设置postgres存储值文档

backrest_storage: 'nfsstorage'
backup_storage: 'nfsstorage'
primary_storage: 'nfsstorage'
replica_storage: 'nfsstorage'

设置存储配置文档

export CCP_SECURITY_CONTEXT='"supplementalGroups": [65534]'
export CCP_STORAGE_PATH=/nfsfileshare
export CCP_NFS_IP=data-nfs-dravoka-nfs-server-provisioner-0.default.svc.cluster.local
export CCP_STORAGE_MODE=ReadWriteMany
export CCP_STORAGE_CAPACITY=400M

创建PGO集群

pgo create cluster -n pgo dravoka --storage-config='nfsstorage' --pgbackrest-storage-config='nfsstorage' --pvc-size='2Gi'

PVC描述：

kubectl describe -n pgo pvc dravoka
Name:          dravoka
Namespace:     pgo
StorageClass:  standard
Status:        Pending
Volume:
Labels:        pg-cluster=dravoka
               pgremove=true
               vendor=crunchydata
Annotations:   volume.beta.kubernetes.io/storage-provisioner: kubernetes.io/gce-pd
Finalizers:    [kubernetes.io/pvc-protection]
Capacity:
Access Modes:
VolumeMode:    Filesystem
Mounted By:    <none>
Events:
  Type     Reason              Age                    From                         Message
  ----     ------              ----                   ----                         -------
  Warning  ProvisioningFailed  112s (x10 over 7m45s)  persistentvolume-controller  Failed to provision volume with StorageClass "standard": invalid AccessModes [ReadWriteMany]: only AccessModes [ReadWriteOnce ReadOnlyMany] are supported

豆荚描述：

kubectl describe -n pgo pod dravoka-backrest-shared-repo-9fdd77886-j2mjv
Name:           dravoka-backrest-shared-repo-9fdd77886-j2mjv
Namespace:      pgo
Priority:       0
Node:           <none>
Labels:         name=dravoka-backrest-shared-repo
                pg-cluster=dravoka
                pg-pod-anti-affinity=preferred
                pgo-backrest-repo=true
                pod-template-hash=9fdd77886
                service-name=dravoka-backrest-shared-repo
                vendor=crunchydata
Annotations:    <none>
Status:         Pending
IP:
IPs:            <none>
Controlled By:  ReplicaSet/dravoka-backrest-shared-repo-9fdd77886
Containers:
  database:
    Image:      registry.developers.crunchydata.com/crunchydata/pgo-backrest-repo:centos7-4.4.1
    Port:       2022/TCP
    Host Port:  0/TCP
    Requests:
      memory:  48Mi
    Environment:
      PGBACKREST_STANZA:           db
      SSHD_PORT:                   2022
      PGBACKREST_DB_PATH:          /pgdata/dravoka
      PGBACKREST_REPO_PATH:        /backrestrepo/dravoka-backrest-shared-repo
      PGBACKREST_PG1_PORT:         5432
      PGBACKREST_LOG_PATH:         /tmp
      PGBACKREST_PG1_SOCKET_PATH:  /tmp
      PGBACKREST_DB_HOST:          dravoka
    Mounts:
      /backrestrepo from backrestrepo (rw)
      /sshd from sshd (ro)
Conditions:
  Type           Status
  PodScheduled   False
Volumes:
  sshd:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  dravoka-backrest-repo-config
    Optional:    false
  backrestrepo:
    Type:        PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace)
    ClaimName:   dravoka-pgbr-repo
    ReadOnly:    false
QoS Class:       Burstable
Node-Selectors:  <none>
Tolerations:     node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
                 node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
  Type     Reason            Age                  From               Message
  ----     ------            ----                 ----               -------
  Warning  FailedScheduling  76s (x7 over 9m58s)  default-scheduler  pod has unbound immediate PersistentVolumeClaims (repeated 2 times)

我是遗漏了一些也是配置好的东西，还是做错了什么？我的目的是使用NFS作为postgres存储。任何帮助都将不胜感激。

Answer 1

未能提供StorageClass“标准”卷:无效的AccessModes ReadWriteMany:仅支持AccessModes ReadWriteOnce ReadOnlyMany

这就是问题的根本原因。您正在使用不支持所需AccessModes的存储类(即ReadWriteMany )提供pvc。

看一下文档，似乎您有了这样的配置

storage3_name: 'nfsstorage'
storage3_access_mode: 'ReadWriteMany'
storage3_size: '1G'
storage3_type: 'create'
storage3_supplemental_groups: 65534

其中storage3_access_mode表示access_mode是ReadWriteMany，但这是不支持的。

请尝试将其更改为ReadWriteOnce

Anw，Postgres需要块存储才能工作，所以即使NFS设置正确，Postgres集群也不会运行。更多解释这里