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Docker Insecure Registries HTTP Configuration

#homelab#docker#registry

Intro

This post covers how to configure Docker to trust and authenticate with insecure HTTP registries.

Private Insecure Registries

In isolated networks where security overhead is minimal, running a private registry over plain HTTP can simplify setup. However, Docker requires explicit configuration to allow these connections.

Configure Insecure Registry

Add the registry to Docker’s configuration:

{
  "insecure-registries": ["192.168.1.50:5000"]
}

Save this to /etc/docker/daemon.json and restart Docker:

sudo systemctl restart docker

Connect to Insecure Registry

Once configured, login and pull:

docker login http://192.168.1.50:5000
docker pull 192.168.1.50:5000/myapp:latest

Security Considerations

This is convenient for internal development but only use this for truly isolated networks. For any registry exposed beyond your network boundary, use proper HTTPS and authentication.

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