Private Docker registry

Topic: Containers core

Run a private Docker registry with the official registry image. Push and pull with docker tag and docker push. Use when you need to store images privately or in CI.

Intent: How-to

Quick answer

  • Run registry with docker run -d -p 5000:5000 registry:2. Use HTTPS and auth in production.
  • Tag image for registry then push. Pull from other hosts after docker login.
  • Use volume for storage. Configure TLS and authentication for production.

Prerequisites

Steps

  1. Run registry

    docker run -d -p 5000:5000 -v regdata:/var/lib/registry registry:2. Add TLS and auth for production.

  2. Push and pull

    docker tag app localhost:5000/app. docker push localhost:5000/app. From another host use hostname and login.

  3. Verify

    Pull image from registry and run. Confirm images listed in registry storage.

Summary

Run registry container; tag and push images; pull from other hosts. Use TLS and auth in production.

Prerequisites

Steps

Step 1: Run registry

Start registry with volume; add TLS and auth for production.

Step 2: Push and pull

Tag with registry host; push; pull from other hosts after login.

Step 3: Verify

Pull and run; confirm registry lists images.

Verification

  • Images push and pull; registry shows them.

Troubleshooting

Push denied — Configure auth. TLS errors — Use valid certs and hostname.

Next steps

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