Use new -core packages for 8.0.1+

The packages mysql-community-client-core and mysql-community-server-core
contain only the binaries needed by the client and server, with no
configuration, services or debug binaries, making them significantly
smaller in size.

* Install -core packages instead of full mysql-server
  Images that build on this and install further packages that depend on
  MySQL may lose the size benefit if the dep is on "mysql-server", but
  should otherwise work as before.
* Add all config files, since core packages do not include any.
  Included the config files in git instead of generating them in the build
  script, to make it a bit easier to see exactly what the default config
  of the image is.

8.0/Dockerfile

@@ -1,5 +1,4 @@
 FROM debian:jessie
-
 # 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
 
@@ -54,19 +53,15 @@ RUN { \
 		echo mysql-community-server mysql-community-server/re-root-pass password ''; \
 		echo mysql-community-server mysql-community-server/remove-test-db select false; \
 	} | debconf-set-selections \
-	&& apt-get update && apt-get install -y mysql-server="${MYSQL_VERSION}" && rm -rf /var/lib/apt/lists/* \
+	&& apt-get update && apt-get install -y mysql-community-client-core="${MYSQL_VERSION}" mysql-community-server-core="${MYSQL_VERSION}" && rm -rf /var/lib/apt/lists/* \
 	&& rm -rf /var/lib/mysql && 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
 
-# comment out a few problematic configuration values
-# don't reverse lookup hostnames, they are usually another container
-RUN sed -Ei 's/^(bind-address|log)/#&/' /etc/mysql/mysql.conf.d/mysqld.cnf \
-	&& echo '[mysqld]\nskip-host-cache\nskip-name-resolve' > /etc/mysql/conf.d/docker.cnf
-
 VOLUME /var/lib/mysql
-
+# Config files
+COPY mysql/ /etc/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"]

8.0/mysql/conf.d/docker.cnf

@@ -0,0 +1,3 @@
+[mysqld]
+skip-host-cache
+skip-name-resolve

8.0/mysql/my.cnf

@@ -0,0 +1,17 @@
+# Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+
+!includedir /etc/mysql/conf.d/
+!includedir /etc/mysql/mysql.conf.d/

8.0/mysql/mysql.conf.d/mysqld.cnf

@@ -0,0 +1,28 @@
+# Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+
+#
+# The MySQL  Server configuration file.
+#
+# For explanations see
+# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
+
+[mysqld]
+pid-file        = /var/run/mysqld/mysqld.pid
+socket          = /var/run/mysqld/mysqld.sock
+datadir         = /var/lib/mysql
+secure-file-priv= NULL
+# Disabling symbolic-links is recommended to prevent assorted security risks
+symbolic-links=0