使用patch_namespaced_deployment不工作从部署中删除卷

Question

我正在尝试使用以下参数使用patch_namespaced_deployment(https://github.com/kubernetes-client/python)修补部署并删除其卷，但它不起作用。

patch_namespaced_deployment(
name=deployment_name,
namespace='default',
body={"spec": {"template": {
"spec": {"volumes": None,
"containers": [{'name': container_name, 'volumeMounts': None}]
}
}
}
},
pretty='true'
)

如何复制:

创建文件app.yaml

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: myclaim
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Gi
---
apiVersion: v1
kind: PersistentVolume
metadata:
annotations:
pv.kubernetes.io/bound-by-controller: "yes"
finalizers:
- kubernetes.io/pv-protection
labels:
volume: pv0001
name: pv0001
resourceVersion: "227035"
selfLink: /api/v1/persistentvolumes/pv0001
spec:
accessModes:
- ReadWriteOnce
capacity:
storage: 5Gi
claimRef:
apiVersion: v1
kind: PersistentVolumeClaim
name: myclaim
namespace: default
resourceVersion: "227033"
hostPath:
path: /mnt/pv-data/pv0001
type: ""
persistentVolumeReclaimPolicy: Recycle
volumeMode: Filesystem
status:
phase: Bound
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: pv-deploy
spec:
replicas: 1
selector:
matchLabels:
app: mypv
template:
metadata:
labels:
app: mypv
spec:
containers:
- name: shell
image: centos:7
command:
- "bin/bash"
- "-c"
- "sleep 10000"
volumeMounts:
- name: mypd
mountPath: "/tmp/persistent"
volumes:
- name: mypd
persistentVolumeClaim:
claimName: myclaim

- kubectl apply -f app.yaml
- kubectl describe deployment.apps/pv-deploy (to check the volumeMounts and Volumes)
- kubectl patch deployment.apps/pv-deploy --patch '{"spec": {"template": {"spec": {"volumes": null, "containers": [{"name": "shell", "volumeMounts": null}]}}}}'
- kubectl describe deployment.apps/pv-deploy (to check the volumeMounts and Volumes)
- Delete the application now: kubectl delete -f app.yaml
- kubectl create -f app.yaml
- Patch the deployment using the python library function as stated above. The *VolumeMounts* section is removed but the Volumes still exist.

编辑**kubectl patch命令运行正常。但在执行Python脚本并运行describe deployment命令后，persistentvolumecclaim将被替换为如下所示的emptyDir

Volumes:
mypd:
Type:       EmptyDir (a temporary directory that shares a pod's lifetime)
Medium:     
SizeLimit:  <unset>

Answer 1

你要做的是所谓的战略合并补丁(https://kubernetes.io/docs/tasks/manage-kubernetes-objects/update-api-object-kubectl-patch/)。正如您在文档中看到的，使用战略性合并补丁，列表将根据其补丁策略被替换或合并所以这可能就是你看到这种行为的原因。

我认为你应该用代替https://jamesdefabia.github.io/docs/user-guide/kubectl/kubectl_replace/，而不是试图管理部署对象的一部分，将其替换为一个新的。