强制PersistentVolumeClaim和Deployment在同一可用区落地

Question

我在亚马逊网络服务中有一个kubernetes集群，在以下AZ中有ec2工作节点，在每个AZ中都有相应的PersistentVolumes。

us-west-2a
us-west-2b
us-west-2c
us-west-2d

我的问题是，我想创建一个具有引用PersistentVolumeClaim的卷装载的部署，并保证它们位于同一AZ中，因为现在幸运的是，部署和PersistentVolumeClaim是否都在同一AZ中。如果它们不在同一AZ中，则部署将无法找到卷挂载。

我通过在每个AZ中手动创建EBS卷并将ID复制到规范中来创建4个PersistentVolumes。

{
  "apiVersion": "v1",
  "kind": "PersistentVolume",
  "metadata": {
    "name": "pv-2"
  },
  "spec": {
    "capacity": {
      "storage": "1Gi"
    },
    "accessModes": [
      "ReadWriteOnce"
    ],
    "persistentVolumeReclaimPolicy": "Retain",
    "awsElasticBlockStore": {
      "volumeID": "vol-053f78f0c16e5f20e",
      "fsType": "ext4"
    }
  }
}

{
   "kind": "PersistentVolumeClaim",
   "apiVersion": "v1",
   "metadata": {
      "name": "mydata",
      "namespace": "staging"
   },
   "spec": {
      "accessModes": [
         "ReadWriteOnce"
      ],
      "resources": {
         "requests": {
            "storage": "10Mi"
         }
      }
   }
}

{
   "apiVersion": "extensions/v1beta1",
   "kind": "Deployment",
   "metadata": {
      "name": "myapp",
      "namespace": "default",
      "labels": {
         "app": "myapp"
      }
   },
   "spec": {
      "replicas": 1,
      "selector": {
         "matchLabels": {
            "app": "myapp"
         }
      },
      "template": {
         "metadata": {
            "labels": {
               "app": "myapp"
            }
         },
         "spec": {
            "containers": [
               {
                  "name": "hello",
                  "image": "centos:7",
                  "volumeMounts": [ {  
                        "name":"mydata",
                        "mountPath":"/etc/data/"
                     } ]
               }
            ],
            "volumes": [ {  
                  "name":"mydata",
                  "persistentVolumeClaim":{  
                     "claimName":"mydata"
                  }
               }]
         }
      }
   }
}

Answer 1

您可以尝试为region和AvailabilityZone设置注解，如here和here中所述