Docker Squid Proxy

This is an Squid-Proxy that acts as a 'transparent-proxy' to accelerate the docker-image reconstruction.

This solution is based on squid-in-a-can project, developed by ©Jérôme Petazzoni.

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• Docker Image
• Requirements
• Limitations
• How-to
• To-Do

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Docker Image

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Requirements

• docker-engine >= 1.12
• docker-compose >= 1.8.1
• docker run need --privileged and --network host flag.

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Limitations

• Can't handle HTTPS for now.

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How-to

Manually (with docker run)

You can manually run these commands:

docker run -d --privileged --network host mgvazquez/squid-proxy

Run via docker-compose

There is a docker-compose.yml file to enable launching via docker compose. To use this you will need a local checkout of this repo and have docker and compose installed.

Run the following command in the same directory as the docker-compose.yml file:

 docker-compose up

You can customize the docker-compose.yml:

version: '2'

volumes:
  squid_cache:

services:
  squid-proxy:
    image: mgvazquez/squid-proxy
    hostname: squid-proxy
    container_name: squid-proxy
    network_mode: host
    privileged: true
    volumes:
      - squid_cache:/var/cache/squid
      - /etc/localtime:/etc/localtime
    environment:
      - SQUID_LISTEN_PORT=3128
      - SQUID_MAX_CACHE_SIZE=5000
      - SQUID_MAX_CACHE_OBJECT=1024

Tuning

The docker image can be tuned using environment variables.

SQUID_LISTEN_PORT

Squid listening port. Use the -e SQUID_LISTEN_PORT=1024 to set the listening port.

SQUID_MAX_CACHE_OBJECT

Squid has a maximum object cache size. Often when caching debian packages vs standard web content it is valuable to increase this size. Use the -e SQUID_MAX_CACHE_OBJECT=1024 to set the max object size (in MB).

SQUID_MAX_CACHE_SIZE

The squid disk cache size can be tuned. Use -e SQUID_MAX_CACHE_SIZE=5000 to set the disk cache size (in MB).

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To-Do

• To handle HTTPS requests with custom trusted certificates.

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