113 lines
3.9 KiB
Markdown
113 lines
3.9 KiB
Markdown
page_title: Running an apt-cacher-ng service
|
||
page_description: Installing and running an apt-cacher-ng service
|
||
page_keywords: docker, example, package installation, networking, debian, ubuntu
|
||
|
||
# Apt-Cacher-ng Service
|
||
|
||
> **Note**:
|
||
>
|
||
> - This example assumes you have Docker running in daemon mode. For
|
||
> more information please see [*Check your Docker
|
||
> install*](../hello_world/#running-examples).
|
||
> - **If you don’t like sudo** then see [*Giving non-root
|
||
> access*](../../installation/binaries/#dockergroup).
|
||
> - **If you’re using OS X or docker via TCP** then you shouldn’t use
|
||
> sudo.
|
||
|
||
When you have multiple Docker servers, or build unrelated Docker
|
||
containers which can’t make use of the Docker build cache, it can be
|
||
useful to have a caching proxy for your packages. This container makes
|
||
the second download of any package almost instant.
|
||
|
||
Use the following Dockerfile:
|
||
|
||
#
|
||
# Build: docker build -t apt-cacher .
|
||
# Run: docker run -d -p 3142:3142 --name apt-cacher-run apt-cacher
|
||
#
|
||
# and then you can run containers with:
|
||
# docker run -t -i --rm -e http_proxy http://dockerhost:3142/ debian bash
|
||
#
|
||
FROM ubuntu
|
||
MAINTAINER SvenDowideit@docker.com
|
||
|
||
VOLUME ["/var/cache/apt-cacher-ng"]
|
||
RUN apt-get update ; apt-get install -yq apt-cacher-ng
|
||
|
||
EXPOSE 3142
|
||
CMD chmod 777 /var/cache/apt-cacher-ng ; /etc/init.d/apt-cacher-ng start ; tail -f /var/log/apt-cacher-ng/*
|
||
|
||
To build the image using:
|
||
|
||
$ sudo docker build -t eg_apt_cacher_ng .
|
||
|
||
Then run it, mapping the exposed port to one on the host
|
||
|
||
$ sudo docker run -d -p 3142:3142 --name test_apt_cacher_ng eg_apt_cacher_ng
|
||
|
||
To see the logfiles that are ‘tailed’ in the default command, you can
|
||
use:
|
||
|
||
$ sudo docker logs -f test_apt_cacher_ng
|
||
|
||
To get your Debian-based containers to use the proxy, you can do one of
|
||
three things
|
||
|
||
1. Add an apt Proxy setting
|
||
`echo 'Acquire::http { Proxy "http://dockerhost:3142"; };' >> /etc/apt/conf.d/01proxy`
|
||
|
||
2. Set an environment variable:
|
||
`http_proxy=http://dockerhost:3142/`
|
||
3. Change your `sources.list` entries to start with
|
||
`http://dockerhost:3142/`
|
||
|
||
**Option 1** injects the settings safely into your apt configuration in
|
||
a local version of a common base:
|
||
|
||
FROM ubuntu
|
||
RUN echo 'Acquire::http { Proxy "http://dockerhost:3142"; };' >> /etc/apt/apt.conf.d/01proxy
|
||
RUN apt-get update ; apt-get install vim git
|
||
|
||
# docker build -t my_ubuntu .
|
||
|
||
**Option 2** is good for testing, but will break other HTTP clients
|
||
which obey `http_proxy`, such as `curl`, `wget` and others:
|
||
|
||
$ sudo docker run --rm -t -i -e http_proxy=http://dockerhost:3142/ debian bash
|
||
|
||
**Option 3** is the least portable, but there will be times when you
|
||
might need to do it and you can do it from your `Dockerfile`
|
||
too.
|
||
|
||
Apt-cacher-ng has some tools that allow you to manage the repository,
|
||
and they can be used by leveraging the `VOLUME`
|
||
instruction, and the image we built to run the service:
|
||
|
||
$ sudo docker run --rm -t -i --volumes-from test_apt_cacher_ng eg_apt_cacher_ng bash
|
||
|
||
$$ /usr/lib/apt-cacher-ng/distkill.pl
|
||
Scanning /var/cache/apt-cacher-ng, please wait...
|
||
Found distributions:
|
||
bla, taggedcount: 0
|
||
1. precise-security (36 index files)
|
||
2. wheezy (25 index files)
|
||
3. precise-updates (36 index files)
|
||
4. precise (36 index files)
|
||
5. wheezy-updates (18 index files)
|
||
|
||
Found architectures:
|
||
6. amd64 (36 index files)
|
||
7. i386 (24 index files)
|
||
|
||
WARNING: The removal action may wipe out whole directories containing
|
||
index files. Select d to see detailed list.
|
||
|
||
(Number nn: tag distribution or architecture nn; 0: exit; d: show details; r: remove tagged; q: quit): q
|
||
|
||
Finally, clean up after your test by stopping and removing the
|
||
container, and then removing the image.
|
||
|
||
$ sudo docker stop test_apt_cacher_ng
|
||
$ sudo docker rm test_apt_cacher_ng
|
||
$ sudo docker rmi eg_apt_cacher_ng
|