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docs: use systemd drop-ins instead of copying

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Copying the entire docker service file isn't necessary to add an
environment variable, instead use a drop-in configuration file. The nice
side-effect is that the user gets any vendor updates to the
docker.service file.

Signed-off-by: Brandon Philips <brandon.philips@coreos.com>
This commit is contained in:
Brandon Philips 2014-12-07 18:44:07 -08:00
parent e0792e7ece
commit 2d51d71561
1 changed files with 6 additions and 2 deletions
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8
docs/sources/articles/systemd.md
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@ -71,10 +71,14 @@ This example overrides the default `docker.service` file.
If you are behind a HTTP proxy server, for example in corporate settings,
you will need to add this configuration in the Docker systemd service file.
Copy file `/usr/lib/systemd/system/docker.service` to `/etc/systemd/system/docker/service`.
First, create a systemd drop-in directory for the docker service:
Add the following to the `[Service]` section in the new file:
mkdir /etc/systemd/system/docker.service.d
Now create a file called `/etc/systemd/system/docker.service.d/http-proxy.conf`
that adds the `HTTP_PROXY` environment variable:
[Service]
Environment="HTTP_PROXY=http://proxy.example.com:80/"
If you have internal Docker registries that you need to contact without