Question

我正在尝试在gcloud kubernetes中运行Oracle DB企业（来自docker存储的最新OEM映像）。但是，我找不到这个运行的示例，而且我是一个菜鸟，遇到很多错误。

使用以下部署代码，我可以部署映像，但是当容器启动并尝试设置数据库时遇到问题，当尝试设置数据库默认值（u01文件系统）时，从容器日志中获得了权限被拒绝等等）。然后，这意味着容器进入无限启动循环，试图自动建立自身。我可以使镜像在docker中正常运行并作为默认部署（没有持久性存储，即仅按原样部署图像），但是问题是当我尝试安装持久性存储卷时。就像我说的那样，我是一个完整的NOOB，所以我只是想根据我在其他DB yaml示例中看到的内容创建一个工作脚本。我了解了概念，但无法使脚本正常工作。下面也有注释掉的代码，它们也不会在gcloud中运行（它可以从kubectl进行验证和运行，但是gcloud在尝试配置时会挂起）。

请帮助。

apiVersion: "v1"
kind: "Namespace"
metadata:
  name: "oracle"
---
apiVersion: "extensions/v1beta1"
kind: "Deployment"
metadata:
  name: "oracledb2"
  namespace: "oracle"
  labels:
    app: "oracledb2"
spec:
  replicas: 1
  selector:
    matchLabels:
      app: "oracledb2"
  template:
    metadata:
      labels:
        app: "oracledb2"
    spec:
      containers:
      - name: "oracledb"
        image: "eu.gcr.io/leafy-envelope-212213/oracledb:latest"
        ports:
            - containerPort: 1521
            - containerPort: 5500
        volumeMounts:
            - name: "oracledb2-v"
              mountPath: "/ORCL"
      volumes:
      - name: "oracledb2-v"
        persistentVolumeClaim:
          claimName: "nfs-pvc"      

# apiVersion: v1
# kind: "PersistentVolume"
# metadata:
  # name: "nfs-pv"
  # namespace: "oracle"
  # labels:
    # app: "oracledb2"  
# spec:
  # capacity:
    # storage: "10Gi"
  # accessModes:
    # - "ReadWriteOnce"
  # gcePersistentDisk:
    # pdName: "gce-nfs-disk"
    # fsType: "ext4"
# ---
# apiVersion: v1
# kind: "PersistentVolumeClaim"
# metadata:
  # name: "nfs-pvc"
  # annotations:
    # volume.alpha.kubernetes.io/storage-class: faster
  # namespace: "oracle"
  # labels:
    # app: "oracledb2"
# spec:
  # accessModes:
    # - "ReadWriteOnce"
  # storageClassName: "faster" 
  # resources:
    # requests:
      # storage: "10Gi"
  # selector:
    # matchLabels:
      # app: "oracledb2"
---
kind: "StorageClass"
apiVersion: "storage.k8s.io/v1"
metadata:
  name: "faster"
  namespace: "oracle"
provisioner: "kubernetes.io/gce-pd"
parameters:
  type: "pd-ssd"
  zone: "europe-west1-b"
  fsType: "ext4"
---  
apiVersion: v1
kind: "PersistentVolumeClaim"
metadata:
  name: "nfs-pvc"
  namespace: "oracle"
  labels:
    name: "oracledb2"
  annotations:
    volume.alpha.kubernetes.io/storage-class: faster
spec:
  storageClassName: faster
  accessModes: [ReadWriteOnce]
  resources:
    requests:
      storage: 10Gi
---
apiVersion: "v1"
kind: "Service"
metadata:
  name: "oracledb2-service"
  namespace: "oracle"
  labels:
    app: "oracledb2"
spec:
  ports:
  - name: "1521-to-1521-tcp"
    protocol: "TCP"
    port: 1521
    targetPort: 1521
  - name: "5500-to-5500-tcp"
    protocol: "TCP"
    port: 5500
    targetPort: 5500
  selector:
    app: "oracledb2"
  type: "LoadBalancer"
  loadBalancerIP: ""
---
apiVersion: "autoscaling/v1"
kind: "HorizontalPodAutoscaler"
metadata:
  name: "oracledb2-hpa"
  namespace: "oracle"
  labels:
    app: "oracledb2"
spec:
  scaleTargetRef:
    kind: "Deployment"
    name: "oracledb2"
    apiVersion: "apps/v1beta1"
  minReplicas: 1
  maxReplicas: 5
  targetCPUUtilizationPercentage: 80

Answer 1

您将希望本similar question-and-answer exchange中所述的initContainer:确保容器用于oracle的UID拥有NFS目录。严格来说，实际上我只希望您只需要执行一次，但是只要您不像我一样使用chown -R（也许错误），在Pod启动时运行它就不会有任何伤害。在该答案中建议。对于只有几个文件的卷来说可以，但是如果该卷中填充了数百个文件，则可能会拖累Pod的开始时间。

另外，我已经相当一段时间没有使用oracle了，但是对于尝试在NFS上运行数据库我要非常谨慎。 gce-pd更有可能表现出您希望的行为，尤其是在GCE提供像AWS一样的预配置IOPS的情况下。

最后，请不要对Oracle使用Deployment：您要使用StatefulSet，因为Pod的身份很可能在启动时与附加的文件系统紧密耦合

gcloud运行OracleDB Docker映像的永久卷的问题（权限被拒绝）

1 个答案: