70 lines
2.6 KiB
Markdown
70 lines
2.6 KiB
Markdown
<!--[metadata]>
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+++
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title = "Insecure Registry"
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description = "Deploying an insecure Registry"
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keywords = ["registry, images, repository"]
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+++
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<![end-metadata]-->
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# Insecure Registry
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While it's highly recommended to secure your registry using a TLS certificate issued by a known CA, you may alternatively decide to use self-signed certificates, or even use your registry over plain http.
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You have to understand the downsides in doing so, and the extra burden in configuration.
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## Deploying a plain HTTP registry
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> :warning: it's not possible to use an insecure registry with basic authentication
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This basically tells Docker to entirely disregard security for your registry.
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1. edit the file `/etc/default/docker` so that there is a line that reads: `DOCKER_OPTS="--insecure-registry myregistrydomain.com:5000"` (or add that to existing `DOCKER_OPTS`)
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2. restart your Docker daemon: on ubuntu, this is usually `service docker stop && service docker start`
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**Pros:**
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- easy to configure
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**Cons:**
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- very insecure
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- you have to configure every docker daemon that wants to access your registry
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## Using self-signed certificates
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> :warning: using this along with basic authentication requires to **also** trust the certificate into the OS cert store for some versions of docker
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Generate your own certificate:
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mkdir -p certs && openssl req \
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-newkey rsa:4096 -nodes -sha256 -keyout certs/domain.key \
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-x509 -days 365 -out certs/domain.crt
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Be sure to use the name `myregistrydomain.com` as a CN.
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Stop and restart your registry.
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Then you have to instruct every docker daemon to trust that certificate. This is done by copying the `domain.crt` file to `/etc/docker/certs.d/myregistrydomain.com:5000/ca.crt` (don't forget to restart docker after doing so).
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Stop and restart all your docker daemons.
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**Pros:**
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- more secure than the insecure registry solution
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**Cons:**
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- you have to configure every docker daemon that wants to access your registry
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## Failing...
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Failing to configure docker and trying to pull from a registry that is not using TLS will result in the following message:
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```
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FATA[0000] Error response from daemon: v1 ping attempt failed with error:
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Get https://myregistrydomain.com:5000/v1/_ping: tls: oversized record received with length 20527.
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If this private registry supports only HTTP or HTTPS with an unknown CA certificate,please add
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`--insecure-registry myregistrydomain.com:5000` to the daemon's arguments.
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In the case of HTTPS, if you have access to the registry's CA certificate, no need for the flag;
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simply place the CA certificate at /etc/docker/certs.d/myregistrydomain.com:5000/ca.crt
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```
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