Full functionality build, producing a heavy-weight image.
Future refinement shold include scripting the build and then stripping all ephemeral dependencies.
This commit is contained in:
Will Rouesnel
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25fd7172cc
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# Squid4 with SSL proxying
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This dockerfile builds a Squid 4.0.7 instance and includes all the necessary
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tooling to run it as a MITM (man-in-the-middle) SSL proxy.
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There's a number of reasons to do this - the big one being optimizing caching
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and delivery of objects during docker builds which might be downloading them
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from SSL protected endpoints.
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It will require you to generate your own CA and set it as trusted.
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The resulting docker image uses the following configuration environment
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variables:
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* `HTTP_PORT`
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Default: `3128`
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* `ICP_PORT`
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If set, enables ICP on the given port for all users.
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* `HTCP_PORT`
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If set, enables HTCP on the given port for all users.
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* `MITM_PROXY`
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If set, tries to enable MITM SSL proxy functionality (requires CERT and KEY)
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* `MITM_CERT`
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If set, the given PEM certificate is copied and used as the CA authority for
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MITM'ing connections.
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* `MITM_KEY`
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If set, the given PEM certificate is copied and used as the signing key for
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the MITM CA.
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* `VISIBLE_HOSTNAME`
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Default: `docker-squid4`
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Should be set to a unique value if you are chaining multiple proxy servers.
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* `MAX_CACHE_SIZE`
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Default: `40000`
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Cache size in megabytes. The cache defaults to `/var/cache/squid4`. You
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should mount a volume here to make it persistent.
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* `MAX_OBJECT_SIZE`
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Default `"1536 MB"`
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Maximum object size to store in the cache. This is set high as one of my
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typical use cases is proxying distribution images.
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* `MEM_CACHE_SIZE`
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Default: `"128 MB"`
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Default memory cache size. I've no real clue what this should be, but RAM
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is plentiful so I like to keep it fairly large.
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FROM debian:jessie
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RUN sed s:deb:deb-src: /etc/apt/sources.list >> /etc/apt/sources.list
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RUN apt-get update && apt-get build-dep -y squid3 && apt-get install -y wget tar xz-utils libssl-dev
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RUN mkdir /src \
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&& cd /src \
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&& wget http://www.squid-cache.org/Versions/v4/squid-4.0.7.tar.xz \
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&& tar -xvvf squid-4.0.7.tar.xz
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RUN cd /src/squid-4.0.7 && \
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./configure \
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--prefix=/usr \
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--datadir=/usr/share/squid4 \
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--sysconfdir=/etc/squid4 \
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--localstatedir=/var \
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--mandir=/usr/share/man \
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--enable-inline \
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--enable-async-io=8 \
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--enable-storeio="ufs,aufs,diskd,rock" \
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--enable-removal-policies="lru,heap" \
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--enable-delay-pools \
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--enable-cache-digests \
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--enable-underscores \
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--enable-icap-client \
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--enable-follow-x-forwarded-for \
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--enable-auth-basic="DB,fake,getpwnam,LDAP,NCSA,NIS,PAM,POP3,RADIUS,SASL,SMB" \
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--enable-auth-digest="file,LDAP" \
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--enable-auth-negotiate="kerberos,wrapper" \
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--enable-auth-ntlm="fake" \
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--enable-external-acl-helpers="file_userip,kerberos_ldap_group,LDAP_group,session,SQL_session,unix_group,wbinfo_group" \
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--enable-url-rewrite-helpers="fake" \
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--enable-eui \
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--enable-esi \
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--enable-icmp \
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--enable-zph-qos \
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--with-openssl \
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--enable-ssl \
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--enable-ssl-crtd \
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--disable-translation \
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--with-swapdir=/var/spool/squid4 \
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--with-logdir=/var/log/squid4 \
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--with-pidfile=/var/run/squid4.pid \
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--with-filedescriptors=65536 \
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--with-large-files \
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--with-default-user=proxy
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ARG CONCURRENCY=1
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RUN cd /src/squid-4.0.7 && \
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make -j$CONCURRENCY && \
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make install
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# Download p2cli dependency
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RUN wget -O /usr/local/bin/p2 \
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https://github.com/wrouesnel/p2cli/releases/download/r1/p2 && \
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chmod +x /usr/local/bin/p2
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COPY squid.conf.p2 /squid.conf.p2
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COPY squid.bsh /squid.bsh
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# Configuration environment
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ENV HTTP_PORT=3128 ICP_PORT= HTCP_PORT= MITM_PROXY= MITM_CERT= MITM_KEY= VISIBLE_HOSTNAME=docker-squid4 MAX_CACHE_SIZE=40000 MAX_OBJECT_SIZE="1536 MB" MEM_CACHE_SIZE="128 MB"
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EXPOSE 3128
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CMD /squid.bsh
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#!/bin/bash
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# Setup the ssl_cert directory
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if [ ! -d /etc/squid4/ssl_cert ]; then
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mkdir /etc/squid4/ssl_cert
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fi
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chown -R proxy:proxy /etc/squid4
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chmod 700 /etc/squid4/ssl_cert
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# Setup the squid cache directory
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if [ ! -d /var/cache/squid4 ]; then
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mkdir -p /var/cache/squid4
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fi
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chown -R proxy: /var/cache/squid4
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chmod -R 750 /var/cache/squid4
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if [ ! -z $MITM_KEY ]; then
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echo "Copying $MITM_KEY as MITM key..."
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cp $MITM_KEY /etc/squid4/ssl_cert/mitm.pem
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chown root:proxy /etc/squid4/ssl_cert/mitm.pem
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fi
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if [ ! -z $MITM_CERT ]; then
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echo "Copying $MITM_CERT as MITM CA..."
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cp $MITM_CERT /etc/squid4/ssl_cert/mitm.crt
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chown root:proxy /etc/squid4/ssl_cert/mitm.crt
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fi
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if [ -z $MITM_CERT ] || [ -z $MITM_KEY ]; then
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echo "Must specify $MITM_CERT AND $MITM_KEY." 1>&2
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exit 1
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fi
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chown proxy: /dev/stdout
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chown proxy: /dev/stderr
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# Initialize the certificates database
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/usr/libexec/security_file_certgen -c -s /var/lib/ssl_db
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chown -R proxy: /var/lib/ssl_db
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#ssl_crtd -c -s
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#ssl_db
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# Set the configuration
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p2 -t /squid.conf.p2 > /etc/squid4/squid.conf
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squid -z -N
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squid -N
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# TEMPLATED CONFIGURATION FILE. UPDATED ON EACH RUN.
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# Default all logs to stdout and stderr
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logfile_rotate 0
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access_log stdio:/dev/stdout combined
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cache_store_log stdio:/dev/stdout
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cache_log /dev/stderr
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netdb_filename stdio:/var/cache/squid4/netdb.state
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# Visible hostname to allow multi-squid
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visible_hostname {{VISIBLE_HOSTNAME|default:"docker-squid4"}}
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# Cache directory is fixed since we'll bind mount.
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cache_dir aufs /var/cache/squid4 {{MAX_CACHE_SIZE|default:"40000"}} 16 256
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maximum_object_size {{MAX_OBJECT_SIZE|default:"1536 MB"}}
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cache_mem {{MEM_CACHE_SIZE|default:"128 MB"}}
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tls_outgoing_options capath=/etc/ssl/certs \
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options=NO_SSLv3,NO_TLSv1 \
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cipher=EECDH+ECDSA+AESGCM:EECDH+aRSA+AESGCM:EECDH+ECDSA+SHA384:EECDH+ECDSA+SHA256:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECDH+aRSA+RC4:EECDH:EDH+aRSA:!RC4:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!SRP:!DSS
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http_port {{HTTP_PORT}} {% if MITM_PROXY|default:"" == "yes" %} ssl-bump \
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generate-host-certificates=on \
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dynamic_cert_mem_cache_size=4MB \
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cert=/etc/squid4/ssl_cert/mitm.crt \
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key=/etc/squid4/ssl_cert/mitm.pem
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{% endif %}
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{% if MITM_PROXY|default:"" == "yes" %}
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ssl_bump server-first all
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{% endif %}
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{% if ICP_PORT|default:"" != "" %}
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icp_port {{ICP_PORT}}
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icp_access allow all
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{% endif %}
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{% if HTCP_PORT|default:"" != "" %}
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htcp_port {{HTCP_PORT}}
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htcp_access allow all
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{% endif %}
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http_access allow all
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