MicroK8s : Enable Registry2021/04/07

To enable MicroK8s built-in Registry, Configure like follows.

[1]	Enable built-in Registry on primary Node. After enabling, [kube-proxy] listens on [0.0.0.0:32000].

# enable registry with backend storage size 30G

# default size is 20G if it's not specified

# possible to specify the size on MicroK8s 1.18.3 or later

[root@dlp ~]#

microk8s enable registry:size=30Gi

Addon storage is already enabled.
Enabling the private registry
Applying registry manifest
namespace/container-registry created
persistentvolumeclaim/registry-claim created
deployment.apps/registry created
service/registry created
configmap/local-registry-hosting configured
The registry is enabled
The size of the persistent volume is 30Gi

# [registry] pod starts

[root@dlp ~]#

microk8s kubectl get pods -A

NAMESPACE            NAME                                         READY   STATUS    RESTARTS   AGE
kube-system          metrics-server-8bbfb4bdb-h6hsr               1/1     Running   0          31m
kube-system          calico-kube-controllers-847c8c99d-cglw5      1/1     Running   1          154m
kube-system          calico-node-nlzz4                            1/1     Running   0          51m
kube-system          coredns-86f78bb79c-nvfqr                     1/1     Running   0          31m
kube-system          kubernetes-dashboard-7ffd448895-hp574        1/1     Running   0          31m
kube-system          dashboard-metrics-scraper-6c4568dc68-fzngj   1/1     Running   0          31m
kube-system          hostpath-provisioner-5c65fbdb4f-7kxjw        1/1     Running   0          10m
container-registry   registry-9b57d9df8-kfv9x                     1/1     Running   0          19s

[2]	After enabling Registry, it's possible to use it with common operation.

[root@dlp ~]#

vi /etc/containers/registries.conf

# line 48 : add your [insecure registry]

[registries.insecure]
registries = [

'localhost', '127.0.0.1', 'dlp.srv.world'

]

[root@dlp ~]#

podman images

REPOSITORY                  TAG     IMAGE ID      CREATED       SIZE
registry.centos.org/centos  latest  2f3766df23b6  3 months ago  217 MB

# tag and push

[root@dlp ~]#

podman tag 2f3766df23b6 localhost:32000/my-centos:registry

[root@dlp ~]#

podman push localhost:32000/my-centos:registry

Getting image source signatures
...
...
Writing manifest to image destination
Storing signatures

[root@dlp ~]#

podman images

REPOSITORY                  TAG       IMAGE ID      CREATED       SIZE
registry.centos.org/centos  latest    2f3766df23b6  3 months ago  217 MB
localhost:32000/my-centos   registry  2f3766df23b6  3 months ago  217 MB

[3]	To use Registry from other Nodes, it's the same usage.

[root@node01 ~]#

vi /etc/containers/registries.conf

# line 48 : add your [insecure registry]

[registries.insecure]
registries = [

'dlp.srv.world'

]

[root@node01 ~]#

podman pull dlp.srv.world:32000/my-centos:registry

Trying to pull dlp.srv.world:32000/my-centos:registry...
Getting image source signatures
...
...
Writing manifest to image destination
Storing signatures
2f3766df23b6b238987b29a0cec50a9974f97948ea2e6569035d374289ca2da2

[root@node01 ~]#

podman images

REPOSITORY                     TAG       IMAGE ID      CREATED       SIZE
dlp.srv.world:32000/my-centos  registry  2f3766df23b6  3 months ago  217 MB

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