Dockerfile

FROM debian:stretch-slim

# add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
RUN groupadd -r mysql && useradd -r -g mysql mysql

RUN apt-get update && apt-get install -y --no-install-recommends gnupg dirmngr && rm -rf /var/lib/apt/lists/*

# add gosu for easy step-down from root
ENV GOSU_VERSION 1.7
RUN set -x \
	&& apt-get update && apt-get install -y --no-install-recommends ca-certificates wget && rm -rf /var/lib/apt/lists/* \
	&& wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture)" \
	&& wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture).asc" \
	&& export GNUPGHOME="$(mktemp -d)" \
	&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
	&& gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu \
	&& gpgconf --kill all \
	&& rm -rf "$GNUPGHOME" /usr/local/bin/gosu.asc \
	&& chmod +x /usr/local/bin/gosu \
	&& gosu nobody true \
	&& apt-get purge -y --auto-remove ca-certificates wget

RUN mkdir /docker-entrypoint-initdb.d

RUN apt-get update && apt-get install -y --no-install-recommends \
# for MYSQL_RANDOM_ROOT_PASSWORD
		pwgen \
# FATAL ERROR: please install the following Perl modules before executing /usr/local/mysql/scripts/mysql_install_db:
# File::Basename
# File::Copy
# Sys::Hostname
# Data::Dumper
		perl \
# mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory
		libaio1 \
# mysql: error while loading shared libraries: libncurses.so.5: cannot open shared object file: No such file or directory
		libncurses5 \
	&& rm -rf /var/lib/apt/lists/*

ENV MYSQL_MAJOR 5.5
ENV MYSQL_VERSION 5.5.61

RUN apt-get update && apt-get install -y ca-certificates wget --no-install-recommends && rm -rf /var/lib/apt/lists/* \
	&& wget "https://cdn.mysql.com/Downloads/MySQL-$MYSQL_MAJOR/mysql-$MYSQL_VERSION-linux-glibc2.12-x86_64.tar.gz" -O mysql.tar.gz \
	&& wget "https://cdn.mysql.com/Downloads/MySQL-$MYSQL_MAJOR/mysql-$MYSQL_VERSION-linux-glibc2.12-x86_64.tar.gz.asc" -O mysql.tar.gz.asc \
	&& apt-get purge -y --auto-remove ca-certificates wget \
	&& export GNUPGHOME="$(mktemp -d)" \
# gpg: key 5072E1F5: public key "MySQL Release Engineering <mysql-build@oss.oracle.com>" imported
	&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys A4A9406876FCBD3C456770C88C718D3B5072E1F5 \
	&& gpg --batch --verify mysql.tar.gz.asc mysql.tar.gz \
	&& gpgconf --kill all \
	&& rm -rf "$GNUPGHOME" mysql.tar.gz.asc \
	&& mkdir /usr/local/mysql \
	&& tar -xzf mysql.tar.gz -C /usr/local/mysql --strip-components=1 \
	&& rm mysql.tar.gz \
	&& rm -rf /usr/local/mysql/mysql-test /usr/local/mysql/sql-bench \
	&& rm -rf /usr/local/mysql/bin/*-debug /usr/local/mysql/bin/*_embedded \
	&& find /usr/local/mysql -type f -name "*.a" -delete \
	&& apt-get update && apt-get install -y binutils && rm -rf /var/lib/apt/lists/* \
	&& { find /usr/local/mysql -type f -executable -exec strip --strip-all '{}' + || true; } \
	&& apt-get purge -y --auto-remove binutils
ENV PATH $PATH:/usr/local/mysql/bin:/usr/local/mysql/scripts

# replicate some of the way the APT package configuration works
# this is only for 5.5 since it doesn't have an APT repo, and will go away when 5.5 does
RUN mkdir -p /etc/mysql/conf.d \
	&& { \
		echo '[mysqld]'; \
		echo 'skip-host-cache'; \
		echo 'skip-name-resolve'; \
		echo 'datadir = /var/lib/mysql'; \
		echo '!includedir /etc/mysql/conf.d/'; \
	} > /etc/mysql/my.cnf

RUN mkdir -p /var/lib/mysql /var/run/mysqld \
	&& chown -R mysql:mysql /var/lib/mysql /var/run/mysqld \
# ensure that /var/run/mysqld (used for socket and lock files) is writable regardless of the UID our mysqld instance ends up having at runtime
	&& chmod 777 /var/run/mysqld

VOLUME /var/lib/mysql

COPY docker-entrypoint.sh /usr/local/bin/
RUN ln -s usr/local/bin/docker-entrypoint.sh /entrypoint.sh # backwards compat
ENTRYPOINT ["docker-entrypoint.sh"]

EXPOSE 3306
CMD ["mysqld"]