使用helm部署mysql发行版

Question

你好，我是k8s和helm生态系统的新手。

我用EC2构建了自己的EC2集群(我可以使用EKS，但为了实践的目的)，下一步是使用helm。

我正在尝试将mysql图表部署到我的k8s集群中。

我的env

• 一个主节点和三个节点的k8s集群(它们都是ec2 t2.小实例)
• 使用https://github.com/helm/charts/tree/master/stable/mysql中的mysql图表

# storage class manifest
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: local-storage
provisioner: kubernetes.io/no-provisioner
#volumeBindingMode: WaitForFirstConsumer

# values.yaml from mysql chart
## Persist data to a persistent volume
persistence:
  enabled: true
  ## database data Persistent Volume Storage Class
  ## If defined, storageClassName: <storageClass>
  ## If set to "-", storageClassName: "", which disables dynamic provisioning
  ## If undefined (the default) or set to null, no storageClassName spec is
  ##   set, choosing the default provisioner.  (gp2 on AWS, standard on
  ##   GKE, AWS & OpenStack)
  ##
  storageClass: "local-storage"  # <-- Changed this to use my own storage class
  accessMode: ReadWriteOnce
  size: 1Gi                      # <-- Changed this since only 2.5GB is available on each node
  annotations: {}
...

问题

pvc上有个错误。下面是相关日志。

ubuntu@nodec1:~/charts/stable/mysql$ kubectl describe pvc/mysqlserver
Name:          mysqlserver
Namespace:     default
StorageClass:  local-storage
Status:        Pending
Volume:
Labels:        app=mysqlserver
               app.kubernetes.io/managed-by=Helm
               chart=mysql-1.6.9
               heritage=Helm
               release=mysqlserver
Annotations:   meta.helm.sh/release-name: mysqlserver
               meta.helm.sh/release-namespace: default
Finalizers:    [kubernetes.io/pvc-protection]
Capacity:
Access Modes:
VolumeMode:    Filesystem
Mounted By:    mysqlserver-5d5cfcd5f8-922k4
Events:
  Type     Reason              Age               From                         Message
  ----     ------              ----              ----                         -------
  Warning  ProvisioningFailed  6s (x3 over 21s)  persistentvolume-controller  no volume plugin matched name: kubernetes.io/no-provisioner

我不知道为什么pvc不能使用我自己的kubernetes.io/no-provisioner存储库中的local-storage插件。有人能在这个问题上提供帮助吗？

Answer 1

此错误意味着由于您没有使用动态卷提供程序(这将自动为您创建卷)，您需要自己创建此卷。

查看k8s文档以获得如何执行此操作的示例：https://kubernetes.io/docs/concepts/storage/volumes/#local

为了进行简单的测试，并检查这是否是问题所在，您可以应用以下yaml：

apiVersion: v1
kind: PersistentVolume
metadata:
  name: example-pv
spec:
  capacity:
    storage: 10Gi
  volumeMode: Filesystem
  accessModes:
  - ReadWriteOnce
  persistentVolumeReclaimPolicy: Delete
  storageClassName: local-storage
  local:
    path: /mnt/asd
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: Exist