Fortify Your Docker Local Private Registry with SSL Authentication: A Path to Enhanced Security

Hey Everyone, in our last article we setup the docker private registry, Now it's time to see how we can make the private registry more secure and resilient.

?? Are you ready to level up your Docker security game? Unlock the secrets of SSL authentication for your local private registry and discover a world of enhanced protection. Say goodbye to potential vulnerabilities and hello to peace of mind. It's time to fortify your Docker registry like never before! ??

How to Protect the Private Docker Registry with authentication?

The newly created private registry is insecure, as anyone can access it and push/pull images. We need to add the authentication feature to it to make it more secure.

To do this, use the?htpasswd?command with the?httpd?image. Use the credentials with the username?and password. Create and store the credentials in the?htpasswd?file under?auth directory. Finally, check the repositories list by executing an HTTP request for?GET .../v2/_catalog?endpoint.

Create a directory to store the user credentials

mkdir -p ~/registry/{certs,auth}        

Step 2: Next, store the user credentials in a password file. To do this, use the?htpasswd?command by passing the username?and password. The httpd image gets downloaded and creates the htpasswd file under the auth directory.

Step 3: Generate a self-singed certificate and key using openssl command

openssl req -newkey rsa:4096 -nodes -sha256 -addext "subjectAltName = DNS:cloudwell.online" -keyout ~/registry/certs/domain.key -x509 -days 365 -out ~/registry/certs/domain.crt        

Step 4: add the same DNS name mentioned in the command above in your /etc/hosts file assigning the private IP.

Step 5: Create a directory structure with the same name as hostname we assigned.

/etc/docker/cert.d/cloudwell.online

Copy crt file in the directory above

cp /root/registry/certs/domain.crt /etc/docker/certs.d/cloudwell.online/         

Step 6: Now run a docker container by mapping the certs and key using docker volume.

Step 7: Login to registry

Step 8: Check on browser.

Voila, it's working.

How to setup private registry (part-1): https://www.dhirubhai.net/posts/anurag-vashishth-7b7bb8156_docker-dockercontainer-dockerimage-activity-7071090738045829120-VvTy?utm_source=share&utm_medium=member_desktop