Create Docker Local Repository (insecure registry)

In this demo I am using "CentOS Linux release 7.7.1908 (Core)". 

Local registry host name: mylocalregistry.local

Step 1

Add local DNS record for /etc/hosts file

vi /etc/hosts

Step 2

Install and enable docker service in each servers

yum install docker-ce docker-ce-cli containerd.io

systemctl enable docker

systemctl start docker

Step 3

Disable SELinux

setenforce 0

Also change the "/etc/selinux/config" to make it permanent.

Step 4

Edit the daemon.json file, whose default location is /etc/docker/daemon.json on each docker host servers.

{

  "insecure-registries" : ["mylocalregistry.local:5000"]

}

Note: Once you done the change restart the docker service.

Step 5

Generate self sigh certificate

mkdir -p /certs

openssl req \

  -newkey rsa:4096 -nodes -sha256 -keyout /certs/mylocalregistry.local.key \

  -x509 -days 365 -out /certs/mylocalregistry.local.crt

 

Copy mylocalregistry.local.crt to /etc/pki/ca-trust/source/anchors/

Update trust certificate list.

Step 6

Create local registry

Execute below command 

docker run -d --restart=always --name my-docker-registry -v /certs:/certs -e REGISTRY_HTTP_ADDR=0.0.0.0:443 -e REGISTRY_HTTP_TLS_CERTIFICATE=/certs/mylocalregistry.local.crt -e REGISTRY_HTTP_TLS_KEY=/certs/mylocalregistry.local.key -p 443:443 -p 5000:5000 registry:2

To verify the docker repo running