SquidをDocker&docker-composeで立ち上げ

docker-composeでproxyサーバを立ち上げる手順です。作成したDockefileは公開しています。

🚜 Dockerfile

まずはSquidのDockerfileです。

FROM ubuntu:14.04

MAINTAINER morizyun <@zyunnosuke>

ENV SQUID_USERNAME squiddummyuser
ENV SQUID_PASSWORD squiddummypassword
ENV SQUID_LOCALNET 10.0.0.0/8
ENV SQUID_CACHE_PEER ""
#ENV SQUID_NEVER_DIRECT "allow all"

ENV CACHE_MAX_SIZE 100
ENV CACHE_MAX_OBJECT_SIZE 4
ENV CACHE_MAX_MEM 256

RUN apt-get update && \
    apt-get install -y squid3 apache2-utils m4 && \
    mv /etc/squid3/squid.conf /etc/squid3/squid.conf.dist && \
    apt-get clean

ADD squid.conf.m4 /etc/squid3/squid.conf.m4
ADD start /start

EXPOSE 3128

VOLUME ["/var/spool/squid3"]

ENTRYPOINT ["/start"]

👽 startコマンド

続いてSquidを立ち上げるためのコマンドです。

#!/bin/bash -ue

# Write the configuration
m4 -DCACHE_MAX_SIZE="{{${CACHE_MAX_SIZE:-100}}}" \
   -DCACHE_MAX_OBJECT_SIZE="{{${CACHE_MAX_OBJECT_SIZE:-4}}}" \
   -DCACHE_MAX_MEM="{{${CACHE_MAX_MEM:-256}}}" \
   -DSQUID_LOCALNET="{{${SQUID_LOCALNET:-127.0.0.1/32}}}" \
   -DSQUID_CACHE_PEER="{{${SQUID_CACHE_PEER:-}}}" \
   -DSQUID_NEVER_DIRECT="{{${SQUID_NEVER_DIRECT:-}}}" \
   /etc/squid3/squid.conf.m4 > /etc/squid3/squid.conf

#		acssions on the log dir
sudo -u proxy -H mkdir -p /var/log/squid3
chmod -R 755 /var/log/squid3
chown -R proxy:proxy /var/log/squid3

# fix permissions on the cache dir
sudo -u proxy -H mkdir -p /var/spool/squid3
chown -R proxy:proxy /var/spool/squid3

# initialize the cache_dir
if [ ! -d /var/spool/squid3/00 ]; then
  /usr/sbin/squid3 -N -f /etc/squid3/squid.conf -z
fi

if [ -n "${SQUID_USERNAME:-}" ] && [ -n "${SQUID_PASSWORD:-}" ]; then
  htpasswd -bc /etc/squid3/passwd "${SQUID_USERNAME}" "${SQUID_PASSWORD}"
fi

# -X verbose debug logging
# -N Don't run in daemon mode - important for docker

exec /usr/sbin/squid3 -N -X -Y -C -f /etc/squid3/squid.conf $@

🍄 docker-compose.yml

docker-compose.ymlです。こちらを作成後、docker-compose upとするとSquidサーバが立ち上がります。

version: '2'
services:
  Squid:
    image: morizyun/squid-docker
    environment:
      SQUID_PASSWORD: squiddummypassword
      SQUID_USERNAME: squiddummyuser
    volumes:
    - /srv/docker/squid/cache:/var/spool/squid3
    ports:
    - 3128:3128/tcp
    labels:
      io.rancher.container.pull_image: always

🐯 補足：Squidのキャッシュを無効にする

Squidのキャッシュやログの保持を無効にする場合はsquid.confに次の内容を追記します。

# No Cache
acl NOCACHE src all
cache deny NOCACHE
cache_dir null /dev/null

# No Log
cache_access_log /dev/null
cache_store_log none
cache_log /dev/null