Can't enable images deletion from a private docker registry - docker

Question

all!!
I'm deploying private registry within K8S cluster with following yaml file:
kind: PersistentVolume
apiVersion: v1
metadata:
name: registry
labels:
type: local
spec:
capacity:
storage: 4Gi
accessModes:
- ReadWriteOnce
hostPath:
path: "/data/registry/"
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: registry-claim
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 4Gi
---
apiVersion: v1
kind: Service
metadata:
name: registry
labels:
app: registry
spec:
ports:
- port: 5000
targetPort: 5000
nodePort: 30400
name: registry
selector:
app: registry
tier: registry
type: NodePort
---
apiVersion: v1
kind: Service
metadata:
name: registry-ui
labels:
app: registry
spec:
ports:
- port: 8080
targetPort: 8080
name: registry
selector:
app: registry
tier: registry
type: NodePort
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: registry
labels:
app: registry
spec:
strategy:
type: Recreate
template:
metadata:
labels:
app: registry
tier: registry
spec:
containers:
- image: registry:2
name: registry
volumeMounts:
- name: docker
mountPath: /var/run/docker.sock
- name: registry-persistent-storage
mountPath: /var/lib/registry
ports:
- containerPort: 5000
name: registry
- name: registryui
image: hyper/docker-registry-web:latest
ports:
- containerPort: 8080
env:
- name: REGISTRY_URL
value: http://localhost:5000/v2
- name: REGISTRY_NAME
value: cluster-registry
volumes:
- name: docker
hostPath:
path: /var/run/docker.sock
- name: registry-persistent-storage
persistentVolumeClaim:
claimName: registry-claim
I'm just wondering that there is no option to delete docker images after pushing them to the local registry. I found the way how it suppose to work here: https://github.com/byrnedo/docker-reg-tool. I can list docker images inside local repository, see all tags via command line, but unable delete them. After reading the docker registry documentation, I've found that registry docker need to be run with following env: REGISTRY_STORAGE_DELETE_ENABLED=true.
I tried to add this variable into yaml file:
.........
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: registry
labels:
app: registry
spec:
strategy:
type: Recreate
template:
metadata:
labels:
app: registry
tier: registry
spec:
containers:
- image: registry:2
name: registry
volumeMounts:
- name: docker
mountPath: /var/run/docker.sock
- name: registry-persistent-storage
mountPath: /var/lib/registry
ports:
- containerPort: 5000
name: registry
env:
- name: REGISTRY_STORAGE_DELETE_ENABLED
value: true
But applying this yaml file with command kubectl apply -f manifests/registry.yaml return following error message:
Deployment in version "v1beta1" cannot be handled as a Deployment: v1beta1.Deployment.Spec: v1beta1.DeploymentSpec.Template: v1.PodTemplateSpec.Spec: v1.PodSpec.Containers: []v1.Container: v1.Container.Env: []v1.EnvVar: v1.EnvVar.Value: ReadString: expects " or n, but found t, error found in #10 byte of ...|,"value":true}],"ima|..., bigger context ...|"name":"REGISTRY_STORAGE_DELETE_ENABLED","value":true}],"image":"registry:2","name":"registry","port|...
After I find another suggestion:
The registry accepts configuration settings either via a file or via
environment variables. So the environment variable
REGISTRY_STORAGE_DELETE_ENABLED=true is equivalent to this in your
config file:
storage:
delete:
enabled: true
I've tried this option as well in my yaml file but still no luck...
Any suggestions how to enable docker images deletion in my yaml file are highly appreciated.

Answer 1

The value of true in yaml is parsed into a boolean data type and the syntax calls for a string. You'll need to explicitly quote it:
value: "true"