Working Behind a Network Proxy: Difference between revisions

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This page lists some configuration tips for working behind a proxy.
= Background =
The Yocto Project build system provides the tools and environment to build the packages that comprise a bootable Linux image. All the sources for the packages must be fetched through various means, including wget, git, and others. You need to configure your system to work with your corporate proxies and there are two options for doing this
# '''Environment variables and configuration files''' - this is the traditional and least intrusive option but involves a number of steps and it can fail in some situations.
# '''Chameleonsocks''' - this is [https://github.com/darkk/redsocks Redsocks] auto-configured in a [https://www.docker.com/ docker] container, the Yocto team's favorite option. If in doubt, go with this option.
 
= Option 1: Environment Variables and Configuration Files =


== HTTP/HTTPS/FTP Setup ==
== HTTP/HTTPS/FTP Setup ==
Set the following environment variables in your <tt>~/.bashrc</tt> file. This example uses the same proxy server and port number for all three protocols.
Set the following environment variables in your <tt>~/.bashrc</tt> file. This example uses the same proxy server and port number for all three protocols.


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  export https_proxy='https://myproxy.example.com:1080/'
  export https_proxy='https://myproxy.example.com:1080/'
  export ftp_proxy='http://myproxy.example.com:1080/'
  export ftp_proxy='http://myproxy.example.com:1080/'
export ALL_PROXY='socks://myproxy.example.com:1080/'
export all_proxy='socks://myproxy.example.com:1080/'
  export no_proxy='.example.com'
  export no_proxy='.example.com'


== Git Setup==
== Git Proxy Configuration ==
Ensure you have socat installed, copy <tt>scripts/oe-git-proxy</tt> to a directory included in your PATH and set the following in your configuration:
Git allows you to specify a command via GIT_PROXY_COMMAND to proxy its network communications. The script, [http://git.yoctoproject.org/cgit/cgit.cgi/poky/plain/scripts/oe-git-proxy oe-git-proxy], uses socat and standard proxy environment variables. Make sure socat is installed otherwise oe-git-proxy will fail silently.
 
Copy [http://git.yoctoproject.org/cgit/cgit.cgi/poky/plain/scripts/oe-git-proxy oe-git-proxy] to a location in your PATH, typically ~/bin/ is a good choice. /usr/local/bin is another common option. oe-git-proxy is provided in poky/scripts/oe-git-proxy, but use the link below to get you bootstrapped. Replacing it with the latest from the poky git repository is recommended.
 
$ sudo apt-get install socat
$ wget http://git.yoctoproject.org/cgit/cgit.cgi/poky/plain/scripts/oe-git-proxy
$ cp oe-git-proxy ~/bin
$ chmod +x ~/bin/oe-git-proxy


GIT_PROXY_COMMAND ?= "oe-git-proxy"
Update your .bashrc to setup the GIT_PROXY_COMMAND variable. You also need to set the '''NO_PROXY''' variable as oe-git-proxy does no recognize '''no_proxy'''
# Two possible examples - delete the one that doesn't apply:
ALL_PROXY ?= "socks://socks.example.com:1080"
ALL_PROXY ?= "https://proxy.example.com:8080"


If you wish to use certain hosts without the proxy, specify them in NO_PROXY. See the script for details on syntax.
export GIT_PROXY_COMMAND="oe-git-proxy"
export NO_PROXY=$no_proxy
 
Be sure to '''log out and back in''' for the settings to take effect.


== Wget Proxy Configuration ==
== Wget Proxy Configuration ==
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  use_proxy = on
  use_proxy = on


== Subversion Setup ==
= Option 2: Chameleonsocks =
 
Chameleonsocks is a containerized proxy solution that is very easy to set up.
You'll need to have the following in your <tt>~/.subversion/servers</tt> file:
* Get files from https://github.com/crops/chameleonsocks
 
* Follow instructions in [https://github.com/crops/chameleonsocks/blob/master/README.MD README]
[global]
http-proxy-exceptions = *.exception.com, www.internal-site.org
http-proxy-host = myproxy.example.com
http-proxy-port = 1080
 
You can also set ''http-proxy-username'' and ''http-proxy-password'' if your proxy requires authentication.
 
== CVS Setup (this seems useless since we don't have any recipe requiring cvs now) ==
 
For CVS checkouts to work correctly, you need to add some options in your Poky ''local.conf'' file.
 
CVS_PROXY_HOST = "myproxy.example.com"
CVS_PROXY_PORT = "1080"

Revision as of 23:52, 2 August 2016

Background

The Yocto Project build system provides the tools and environment to build the packages that comprise a bootable Linux image. All the sources for the packages must be fetched through various means, including wget, git, and others. You need to configure your system to work with your corporate proxies and there are two options for doing this

  1. Environment variables and configuration files - this is the traditional and least intrusive option but involves a number of steps and it can fail in some situations.
  2. Chameleonsocks - this is Redsocks auto-configured in a docker container, the Yocto team's favorite option. If in doubt, go with this option.

Option 1: Environment Variables and Configuration Files

HTTP/HTTPS/FTP Setup

Set the following environment variables in your ~/.bashrc file. This example uses the same proxy server and port number for all three protocols. 

export http_proxy='http://myproxy.example.com:1080/'
export https_proxy='https://myproxy.example.com:1080/'
export ftp_proxy='http://myproxy.example.com:1080/'
export ALL_PROXY='socks://myproxy.example.com:1080/'
export all_proxy='socks://myproxy.example.com:1080/'
export no_proxy='.example.com'

Git Proxy Configuration

Git allows you to specify a command via GIT_PROXY_COMMAND to proxy its network communications. The script, oe-git-proxy, uses socat and standard proxy environment variables. Make sure socat is installed otherwise oe-git-proxy will fail silently.

Copy oe-git-proxy to a location in your PATH, typically ~/bin/ is a good choice. /usr/local/bin is another common option. oe-git-proxy is provided in poky/scripts/oe-git-proxy, but use the link below to get you bootstrapped. Replacing it with the latest from the poky git repository is recommended. 

$ sudo apt-get install socat
$ wget http://git.yoctoproject.org/cgit/cgit.cgi/poky/plain/scripts/oe-git-proxy
$ cp oe-git-proxy ~/bin
$ chmod +x ~/bin/oe-git-proxy

Update your .bashrc to setup the GIT_PROXY_COMMAND variable. You also need to set the NO_PROXY variable as oe-git-proxy does no recognize no_proxy 

export GIT_PROXY_COMMAND="oe-git-proxy"
export NO_PROXY=$no_proxy

Be sure to log out and back in for the settings to take effect.

Wget Proxy Configuration

Proxy environment variables are not propagated to all stages of the Yocto build process so sometimes wget cannot pick them up. To workaround this add the following to ~/.wgetrc. 

https_proxy = http://socks.example.com:1080
http_proxy = http://socks.example.com:1080
ftp_proxy = http://socks.example.com:1080
no_proxy = .example.com:1080;127.0.0.1
use_proxy = on

Option 2: Chameleonsocks

Chameleonsocks is a containerized proxy solution that is very easy to set up.

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