在我的docker映像中,我有一个目录/opt/myapp/etc
,其中包含一些文件和目录。我想为我的应用创建statefulset。在该有状态集中,我将创建持久卷声明并附加到/opt/myapp/etc
。以下是Statefulset yaml
。有人可以告诉我在这种情况下如何将体积连接到容器吗?
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: statefulset
labels:
app: myapp
spec:
serviceName: myapp
replicas: 1
selector:
matchLabels:
app: myapp
template:
metadata:
labels:
app: myapp
spec:
containers:
- image: 10.1.23.5:5000/redis
name: redis
ports:
- containerPort: 6379
name: redis-port
- image: 10.1.23.5:5000/myapp:18.1
name: myapp
ports:
- containerPort: 8181
name: port
volumeMounts:
- name: data
mountPath: /opt/myapp/etc
volumeClaimTemplates:
- metadata:
name: data
spec:
accessModes: [ "ReadWriteOnce" ]
storageClassName: standard
resources:
requests:
storage: 5Gi
这是describe pod的输出
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning FailedScheduling 3m (x4 over 3m) default-scheduler pod has unbound PersistentVolumeClaims
Normal Scheduled 3m default-scheduler Successfully assigned controller-statefulset-0 to dev-k8s-2
Normal SuccessfulMountVolume 3m kubelet, dev-k8s-2 MountVolume.SetUp succeeded for volume "default-token-xpskd"
Normal SuccessfulAttachVolume 3m attachdetach-controller AttachVolume.Attach succeeded for volume "pvc-77d2cef8-a674-11e8-9358-fa163e3294c1"
Normal SuccessfulMountVolume 3m kubelet, dev-k8s-2 MountVolume.SetUp succeeded for volume "pvc-77d2cef8-a674-11e8-9358-fa163e3294c1"
Normal Pulling 2m kubelet, dev-k8s-2 pulling image "10.1.23.5:5000/redis"
Normal Pulled 2m kubelet, dev-k8s-2 Successfully pulled image "10.1.23.5:5000/redis"
Normal Created 2m kubelet, dev-k8s-2 Created container
Normal Started 2m kubelet, dev-k8s-2 Started container
Normal Pulled 1m (x4 over 2m) kubelet, dev-k8s-2 Container image "10.1.23.5:5000/myapp:18.1" already present on machine
Normal Created 1m (x4 over 2m) kubelet, dev-k8s-2 Created container
Normal Started 1m (x4 over 2m) kubelet, dev-k8s-2 Started container
Warning BackOff 1m (x7 over 2m) kubelet, dev-k8s-2 Back-off restarting failed container
存储类定义
kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
name: standard
namespace: controller
provisioner: kubernetes.io/cinder
reclaimPolicy: Retain
parameters:
availability: nova
答案 0 :(得分:2)
检查集群中是否定义了存储类。
kubectl get storageclass
如果您使用默认存储类作为主机路径(在minikube的情况下),则无需在模板中包括存储类。
volumeClaimTemplates:
- metadata:
name: data
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 5Gi
通过不指定任何存储类,k8将继续进行操作,并使用默认存储类(在minikube情况下为主机路径)来调度持久卷,并确保/opt/myapp/etc
存在于要调度pod的节点上。 / p>
答案 1 :(得分:0)
Kubernetes不允许将2个卷挂载到同一目录。第二次安装将覆盖第一次创建的文件。 在我的情况下,docker映像在etc目录中有一些文件,这些文件在装入卷后被删除。使用子路径解决了问题。