docker squid---but git proxy should specify by git config --global http.proxy http:...

Usage of loopback devices is strongly discouraged for production use. Either use `--storage-opt dm.thinpooldev` or use `--storage-opt dm.no_warn_on_loop_devices=true` to suppress this warning.

http://www.cnblogs.com/mchina/p/3812190.html

https://hub.docker.com/r/sameersbn/squid/

 https://github.com/sameersbn/docker-squid

docker pull sameersbn/squid:3.3.8-14

docker run --name squid -d --restart=always   --publish 3128:3128   --volume /srv/docker/squid/cache:/var/spool/squid3   sameersbn/squid:3.3.8-14

Configuration

Squid is a full featured caching proxy server and a large number of configuration parameters. To configure Squid as per your requirements edit the default squid.conf and volume mount it at/etc/squid3/squid.conf.

docker run --name squid -d --restart=always 
  --publish 3128:3128 
  --volume /path/to/squid.conf:/etc/squid3/squid.conf 
  --volume /srv/docker/squid/cache:/var/spool/squid3 
  sameersbn/squid:3.3.8-14

To reload the Squid configuration on a running instance you can send the HUP signal to the container.

docker kill -s HUP squid

Usage

Configure your web browser network/connection settings to use the proxy server which is available at172.17.42.1:3128

If you are using Linux then you can also add the following lines to your .bashrc file allowing command line applications to use the proxy server for outgoing connections.

export ftp_proxy=http://172.17.42.1:3128
export http_proxy=http://172.17.42.1:3128
export https_proxy=http://172.17.42.1:3128

To use Squid in your Docker containers add the following line to your Dockerfile.

ENV http_proxy=http://172.17.42.1:3128 
    https_proxy=http://172.17.42.1:3128 
    ftp_proxy=http://172.17.42.1:3128

Logs

To access the Squid logs, located at /var/log/squid3/, you can use docker exec. For example, if you want to tail the access logs:

docker exec -it squid tail -f /var/log/squid3/access.log

You can also mount a volume at /var/log/squid3/ so that the logs are directly accessible on the host.