Httpd Proxypreservehost

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  1. Apache Httpd Proxypreservehost
  2. Httpd.conf Proxypreservehost

Apache's HTTP Server ('httpd') is typically used to make the applications available on their proper URLs, hiding the port number and context path. This is done by configuring virtual hosts. In effect Apache HTTP Server then acts as a reverse proxy.

  1. ProxyPreserveHost On をつけておくと、HTTPヘッダのHostが引き継がれる。 さて、別のホスト名 fugafuga.com でアクセスしたときも同様に web01 へプロキシしたい。.
  2. When ProxyPreserveHost is set to OFF in Apache HTTPd's configuration, several issues can ensue: Rich Text editor does not display - CONF-13942 (fixed in 2.10.1) Some configurations with Trusted Applications may not work (if the server base URL differs). ProxyPreserveHost is set to OFF in Apache's configuration.
  3. Avoid ProxyPreserveHost On it is almost always wrong, useless and almost always breaks ProxyPassReverse. As a side note ProxyRequests off is the default, thus redundant. – kubanczyk Dec 6 '16 at 16:55.

Estimated reading time: 4 minutes

This page contains information about hosting your own registry using theopen source Docker Registry. For information about Docker Hub, which offers ahosted registry with additional features such as teams, organizations, webhooks, automated builds, etc, see Docker Hub.

Use-case

People already relying on an apache proxy to authenticate their users to other services might want to leverage it and have Registry communications tunneled through the same pipeline.

Usually, that includes enterprise setups using LDAP/AD on the backend and a SSO mechanism fronting their internal http portal.

Alternatives

If you just want authentication for your registry, and are happy maintaining users access separately, you should really consider sticking with the native basic auth registry feature.

Solution

With the method presented here, you implement basic authentication for docker engines in a reverse proxy that sits in front of your registry.

While we use a simple htpasswd file as an example, any other apache authentication backend should be fairly easy to implement once you are done with the example.

We also implement push restriction (to a limited user group) for the sake of the example. Again, you should modify this to fit your mileage.

Gotchas

While this model gives you the ability to use whatever authentication backend you want through the secondary authentication mechanism implemented inside your proxy, it also requires that you move TLS termination from the Registry to the proxy itself.

Furthermore, introducing an extra http layer in your communication pipeline adds complexity when deploying, maintaining, and debugging.

Setting things up

Read again the requirements.

Ready?

Apache Httpd Proxypreservehost

Run the following script:

Starting and stopping

Now, start your stack:

Log in with a “push” authorized user (using testuserpush and testpasswordpush), then tag and push your first image:

Now, log in with a “pull-only” user (using testuser and testpassword), then pull back the image:

ProxypreservehostProxypreservehost

Verify that the “pull-only” can NOT push:

registry, on-prem, images, tags, repository, distribution, authentication, proxy, apache, httpd, TLS, recipe, advanced

Estimated reading time: 4 minutes

This page contains information about hosting your own registry using theopen source Docker Registry. For information about Docker Hub, which offers ahosted registry with additional features such as teams, organizations, webhooks, automated builds, etc, see Docker Hub.

Use-case

People already relying on an apache proxy to authenticate their users to other services might want to leverage it and have Registry communications tunneled through the same pipeline.

Usually, that includes enterprise setups using LDAP/AD on the backend and a SSO mechanism fronting their internal http portal.

Alternatives

Proxypreservehost

If you just want authentication for your registry, and are happy maintaining users access separately, you should really consider sticking with the native basic auth registry feature.

Solution

With the method presented here, you implement basic authentication for docker engines in a reverse proxy that sits in front of your registry.

While we use a simple htpasswd file as an example, any other apache authentication backend should be fairly easy to implement once you are done with the example.

We also implement push restriction (to a limited user group) for the sake of the example. Again, you should modify this to fit your mileage.

Gotchas

While this model gives you the ability to use whatever authentication backend you want through the secondary authentication mechanism implemented inside your proxy, it also requires that you move TLS termination from the Registry to the proxy itself.

Furthermore, introducing an extra http layer in your communication pipeline adds complexity when deploying, maintaining, and debugging.

Setting things up

Read again the requirements.

Ready?

Run the following script:

Starting and stopping

Now, start your stack:

Httpd.conf Proxypreservehost

Log in with a “push” authorized user (using testuserpush and testpasswordpush), then tag and push your first image:

Now, log in with a “pull-only” user (using testuser and testpassword), then pull back the image:

Verify that the “pull-only” can NOT push:

Httpdregistry, on-prem, images, tags, repository, distribution, authentication, proxy, apache, httpd, TLS, recipe, advanced