Added ability to customize database configurations in Docker images used in integration tests

debezium-ingest-mysql/src/test/docker/Dockerfile

@@ -2,9 +2,15 @@ FROM mysql/mysql-server:5.7
 
 MAINTAINER Debezium Community
 
-COPY * /docker-entrypoint-initdb.d/
-RUN rm /docker-entrypoint-initdb.d/Dockerfile && \
-    chmod 755 *.sh
+#
+# Add our scripts to the Docker entry point initialization directory
+#
+COPY init/* /docker-entrypoint-initdb.d/
+
+#
+# Overwrite the MySQL configuration file with ours
+#
+COPY mysql.cnf /etc/my.cnf
 
 ENTRYPOINT ["/entrypoint.sh"]
 CMD ["mysqld"]

debezium-ingest-mysql/src/test/docker/mysql.cnf

@@ -0,0 +1,32 @@
+# For advice on how to change settings please see
+# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
+
+[mysqld]
+#
+# Remove leading # and set to the amount of RAM for the most important data
+# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
+# innodb_buffer_pool_size = 128M
+#
+# Remove leading # to turn on a very important data integrity option: logging
+# changes to the binary log between backups.
+# log_bin
+#
+# Remove leading # to set options mainly useful for reporting servers.
+# The server defaults are faster for transactions and fast SELECTs.
+# Adjust sizes as needed, experiment to find the optimal values.
+# join_buffer_size = 128M
+# sort_buffer_size = 2M
+# read_rnd_buffer_size = 2M
+skip-host-cache
+skip-name-resolve
+datadir=/var/lib/mysql
+socket=/var/lib/mysql/mysql.sock
+secure-file-priv=/var/lib/mysql-files
+user=mysql
+
+# Disabling symbolic-links is recommended to prevent assorted security risks
+symbolic-links=0
+
+log-error=/var/log/mysqld.log
+pid-file=/var/run/mysqld/mysqld.pid
+

debezium-ingest-postgres/src/test/docker/Dockerfile

@@ -2,9 +2,14 @@ FROM postgres:9.4
 
 MAINTAINER Debezium Community
 
-COPY * /docker-entrypoint-initdb.d/
-RUN rm /docker-entrypoint-initdb.d/Dockerfile && \
-    chmod 755 *.sh
+#
+# Add our scripts to the Docker entry point initialization directory
+#
+COPY init/* /docker-entrypoint-initdb.d/
+
+#
+# Changes to the PostgreSQL configuration are made via the `00-alter-conf.sql` file.
+#
 
 ENTRYPOINT ["/docker-entrypoint.sh"]
 CMD ["postgres"]

debezium-ingest-postgres/src/test/docker/init/00-alter-conf.sql

@@ -0,0 +1,4 @@
+-- Change the system configuration
+
+ALTER SYSTEM SET max_replication_slots = 10;
+ALTER SYSTEM SET wal_level = 'logical';