Implements: blueprint Implement a database container set

Previously, the database container was configured for use with
Kubernetes. This patch removed any k8s dependencies, adds a script
to manage mysql server.cnf settings and splits data and app
containers. Splitting the containers provides additional
portability and operational efficiencies compared to host mounts.

Change-Id: I80656450c02dda5f2959d187eec20d5877dc54a2

compose/mariadb.yml

@@ -0,0 +1,14 @@
+mariadbdata:
+  image: kollaglue/centos-rdo-mariadb-data
+  volumes:
+    - /var/lib/mysql:/var/lib/mysql
+  net: "host"
+  privileged: true
+mariadbapp:
+  image: kollaglue/centos-rdo-mariadb-app
+  env_file:
+    - openstack.env
+  volumes_from:
+    - mariadbdata
+  net: "host"
+  privileged: true

docker/mariadb-app/Dockerfile

@@ -0,0 +1,18 @@
+FROM %%KOLLA_NAMESPACE%%/%%KOLLA_PREFIX%%base
+MAINTAINER Kolla Project (https://launchpad.net/kolla)
+
+# Install packages
+# TODO check if hostname pkg is needed.
+RUN yum -y install mariadb \
+    mariadb-server \
+    MySQL-python \
+    hostname \
+    && yum clean all
+
+# Add mysql configuration scripts
+ADD config-mysql.sh /opt/kolla/config-mysql.sh
+ADD mysql-entrypoint.sh /opt/kolla/mysql-entrypoint.sh
+
+# start mysql
+ENTRYPOINT ["/opt/kolla/mysql-entrypoint.sh"]
+CMD ["mysqld_safe"]

docker/mariadb-app/config-mysql.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+. /opt/kolla/kolla-common.sh
+
+: ${BIND_ADDRESS:=$PUBLIC_IP}
+: ${DB_ROOT_PASSWORD:=$DB_ROOT_PASSWORD}
+: ${DEFAULT_STORAGE_ENGINE:=innodb}
+: ${COLLATION_SERVER:=utf8_general_ci}
+: ${INIT_CONNECT:=SET NAMES utf8}
+: ${CHAR_SET_SERVER:=utf8}
+: ${INNODB_FILE_PER_TABLE:=true}
+: ${DATADIR:=/var/lib/mysql}
+: ${TEMP_FILE:='/tmp/mysql-first-time.sql'}
+
+server_cnf=/etc/my.cnf.d/server.cnf
+
+crudini --set $server_cnf mysqld bind-address $BIND_ADDRESS
+crudini --set $server_cnf mysqld default-storage-engine $DEFAULT_STORAGE_ENGINE
+crudini --set $server_cnf mysqld collation-server $COLLATION_SERVER
+crudini --set $server_cnf mysqld init-connect "'${INIT_CONNECT}'"
+crudini --set $server_cnf mysqld character-set-server $CHAR_SET_SERVER
+if [ "${INNODB_FILE_PER_TABLE}" == "true" ] || ["${INNODB_FILE_PER_TABLE}" == "True" ] ; then
+  crudini --set $server_cnf mysqld innodb_file_per_table 1
+fi

docker/mariadb-app/mysql-entrypoint.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+set -e
+
+# Configure MySQL settings
+. /opt/kolla/config-mysql.sh
+
+if [ -z "$(ls -A /var/lib/mysql)" -a "${1%_safe}" = 'mysqld' ]; then
+        PATH=/usr/libexec:$PATH
+        export PATH
+
+        if [ -z "$MARIADB_ROOT_PASSWORD" ]; then
+                echo >&2 'error: database is uninitialized and MARIADB_ROOT_PASSWORD not set'
+                echo >&2 '  Did you forget to add -e MARIADB_ROOT_PASSWORD=... ?'
+                exit 1
+        fi
+
+        mysql_install_db --user=mysql --datadir="$DATADIR"
+
+        # These statements _must_ be on individual lines, and _must_ end with
+        # semicolons (no line breaks or comments are permitted).
+        # TODO proper SQL escaping on ALL the things D:
+        TEMP_FILE='/tmp/mysql-first-time.sql'
+        cat > "$TEMP_FILE" <<-EOSQL
+		DELETE FROM mysql.user ;
+		CREATE USER 'root'@'%' IDENTIFIED BY '${MARIADB_ROOT_PASSWORD}' ;
+		GRANT ALL ON *.* TO 'root'@'%' WITH GRANT OPTION ;
+		DROP DATABASE IF EXISTS test ;
+	EOSQL
+
+        if [ "$MARIADB_DATABASE" ]; then
+                echo "CREATE DATABASE IF NOT EXISTS $MARIADB_DATABASE ;" >> "$TEMP_FILE"
+        fi
+
+        if [ "$MARIADB_USER" -a "$MARIADB_PASSWORD" ]; then
+                echo "CREATE USER '$MARIADB_USER'@'%' IDENTIFIED BY '$MARIADB_PASSWORD' ;" >> "$TEMP_FILE"
+
+                if [ "$MARIADB_DATABASE" ]; then
+                        echo "GRANT ALL ON $MARIADB_DATABASE.* TO '$MARIADB_USER'@'%' ;" >> "$TEMP_FILE"
+                fi
+        fi
+
+        echo 'FLUSH PRIVILEGES ;' >> "$TEMP_FILE"
+
+        set -- "$@" --init-file="$TEMP_FILE"
+fi
+
+chown -R mysql:mysql "$DATADIR"
+
+exec "$@"

docker/mariadb-data/Dockerfile

@@ -0,0 +1,6 @@
+FROM %%KOLLA_NAMESPACE%%/%%KOLLA_PREFIX%%base
+MAINTAINER Kolla Project (https://launchpad.net/kolla)
+
+# Command needed to start the data container.
+# Note: data containers do not need to be persistent.
+CMD ["/bin/sh"]

docker/mariadb-data/build

@@ -0,0 +1 @@
+../../tools/build-docker-image

docker/mariadb/Dockerfile

@@ -1,13 +0,0 @@
-FROM %%KOLLA_NAMESPACE%%/%%KOLLA_PREFIX%%base
-MAINTAINER Kolla Project (https://launchpad.net/kolla)
-
-RUN yum -y install mariadb-galera-server hostname; yum clean all
-ADD /entrypoint.sh /entrypoint.sh
-
-VOLUME /var/lib/mysql
-VOLUME /var/log/mariadb
-
-EXPOSE 3306
-
-ENTRYPOINT ["/entrypoint.sh"]
-CMD ["mysqld_safe"]

docker/mariadb/entrypoint.sh

@@ -1,47 +0,0 @@
-#!/bin/bash
-set -e
-
-: ${MYSQL_ROOT_PASSWORD:=$DB_ROOT_PASSWORD}
-
-if [ -z "$(ls -A /var/lib/mysql)" -a "${1%_safe}" = 'mysqld' ]; then
-	PATH=/usr/libexec:$PATH
-	export PATH
-
-	if [ -z "$MYSQL_ROOT_PASSWORD" ]; then
-		echo >&2 'error: database is uninitialized and MYSQL_ROOT_PASSWORD not set'
-		echo >&2 '  Did you forget to add -e MYSQL_ROOT_PASSWORD=... ?'
-		exit 1
-	fi
-	
-	mysql_install_db --user=mysql --datadir=/var/lib/mysql
-	
-	# These statements _must_ be on individual lines, and _must_ end with
-	# semicolons (no line breaks or comments are permitted).
-	# TODO proper SQL escaping on ALL the things D:
-	TEMP_FILE='/tmp/mysql-first-time.sql'
-	cat > "$TEMP_FILE" <<-EOSQL
-		DELETE FROM mysql.user ;
-		CREATE USER 'root'@'%' IDENTIFIED BY '${MYSQL_ROOT_PASSWORD}' ;
-		GRANT ALL ON *.* TO 'root'@'%' WITH GRANT OPTION ;
-		DROP DATABASE IF EXISTS test ;
-	EOSQL
-	
-	if [ "$MYSQL_DATABASE" ]; then
-		echo "CREATE DATABASE IF NOT EXISTS $MYSQL_DATABASE ;" >> "$TEMP_FILE"
-	fi
-	
-	if [ "$MYSQL_USER" -a "$MYSQL_PASSWORD" ]; then
-		echo "CREATE USER '$MYSQL_USER'@'%' IDENTIFIED BY '$MYSQL_PASSWORD' ;" >> "$TEMP_FILE"
-		
-		if [ "$MYSQL_DATABASE" ]; then
-			echo "GRANT ALL ON $MYSQL_DATABASE.* TO '$MYSQL_USER'@'%' ;" >> "$TEMP_FILE"
-		fi
-	fi
-	
-	echo 'FLUSH PRIVILEGES ;' >> "$TEMP_FILE"
-	
-	set -- "$@" --init-file="$TEMP_FILE"
-fi
-
-chown -R mysql:mysql /var/lib/mysql
-exec "$@"

docs/database-container-set.md

@@ -0,0 +1,50 @@
+MariaDB Container Set
+=====================
+
+The MariaDB database application has been organized into two containers,
+known as a [container-set][] within the Kolla project. One container runs
+the MariaDB application and the other stores the actual data.
+
+Operational efficiencies and service stability is provided by
+separating the application from the stored data. For example, stored data
+can be backed-up or restored without touching the MariaDB application
+component.
+
+The containers work in a cooperative fashion by using [docker-compose][]
+(aka Fig) to ensure the containers are co-located on the same host.
+With docker-compose, you can manage the containers collectively
+as a single unit.
+
+Here is a sample docker-compose yaml file for using both MariaDB containers:
+
+```
+mariadbdata:
+  image: kollaglue/centos-rdo-mariadb-data
+  volumes:
+    - /var/lib/mysql:/var/lib/mysql
+    - /var/log/mariadb:/var/log/mariadb
+  net: "host"
+  privileged: true
+mariadbapp:
+  image: kollaglue/centos-rdo-mariadb-app
+  env_file:
+    - openstack.env
+  volumes_from:
+    - mariadbdata
+  net: "host"
+  ports:
+    - "3306:3306"
+  privileged: true
+```
+
+In addition to the MariaDB application being organized across two containers, the data
+container follows the [data-only container][] design pattern. In this design pattern,
+a dedicated container is used to perform a host mount and separate application
+container(s) mount volumes from the data-only container instead of performing the host
+mount directly. In the example above, the MariaDbApp container mounts the /var/lib/mysql
+and /var/log/mariadb volumes through the MariaDbData container instead of mounting
+these directly to the Docker host.
+
+[docker-compose]: http://www.fig.sh/
+[container-set]: https://review.openstack.org/#/c/153798/
+[data-only container]: http://www.tech-d.net/2013/12/16/persistent-volumes-with-docker-container-as-volume-pattern/

docs/integration-guide.md

@@ -42,7 +42,6 @@ all containers.  This allows a simple method of ensuring every type of node
 ### Environment Variable KEY/VALUE pairs
 
     ADMIN_TENANT_NAME=<admin> - tenant name
-    DB_ROOT_PASSWORD=<mysql root password> - defines the MYSQL root password
     FLAT_INTERFACE=<nova or neutron networking flat interface device name>
     GLANCE_API_SERVICE_HOST=<IP> - address where glance API is running>
     GLANCE_DB_NAME=<glance> - DB name of glance service
@@ -58,8 +57,8 @@ all containers.  This allows a simple method of ensuring every type of node
     KEYSTONE_AUTH_PROTOCOL=<http> - The keystone authentication protocol
     KEYSTONE_DB_PASSWORD=<password> - The password used to access Keystone in the DB
     KEYSTONE_PUBLIC_SERVICE_HOST=<IP> - The IP address where Keystone is running
-    MARIADB_SERVICE_HOST=<IP> - The IP Address where mariadb is running
-    MYSQL_ROOT_PASSWORD=<password> - The MYSQL password
+    MARIADB_ROOT_PASSWORD=<mariadb root password> - defines the MariaDB root password
+    MARIADB_SERVICE_HOST=<IP> - The IP Address where Mariadb is running
     NETWORK_MANAGER=<nova|neutron> - Use Nova or Neutron networking
     NOVA_API_SERVICE_HOST=<IP> - The IP Address where the Nova API Service is hosted
     NOVA_DB_NAME=<nova> - The name of the nova entry in the database

tools/genenv

@@ -21,7 +21,7 @@ echo MY_DEV=$MY_DEV
 
 # Database
 HOST_IP=$MY_IP
-MYSQL_ROOT_PASSWORD=kolla
+MARIADB_ROOT_PASSWORD=kolla
 PASSWORD=12345
 
 # Host
@@ -72,7 +72,7 @@ EOF
 cat > ./compose/openstack.env <<EOF
 ADMIN_TENANT_NAME=$ADMIN_TENANT_NAME
 CONFIG_NETWORK=$CONFIG_NETWORK
-DB_ROOT_PASSWORD=$MYSQL_ROOT_PASSWORD
+DB_ROOT_PASSWORD=$MARIADB_ROOT_PASSWORD
 FLAT_INTERFACE=$NOVA_FLAT_INTERFACE
 GLANCE_API_SERVICE_HOST=$GLANCE_API_SERVICE_HOST
 GLANCE_DB_NAME=$GLANCE_DB_NAME
@@ -89,7 +89,7 @@ KEYSTONE_AUTH_PROTOCOL=$KEYSTONE_AUTH_PROTOCOL
 KEYSTONE_DB_PASSWORD=$KEYSTONE_DB_PASSWORD
 KEYSTONE_PUBLIC_SERVICE_HOST=$KEYSTONE_PUBLIC_SERVICE_HOST
 MARIADB_SERVICE_HOST=$HOST_IP
-MYSQL_ROOT_PASSWORD=$MYSQL_ROOT_PASSWORD
+MARIADB_ROOT_PASSWORD=$MARIADB_ROOT_PASSWORD
 NETWORK_MANAGER=nova
 NOVA_API_SERVICE_HOST=$NOVA_API_SERVICE_HOST
 NOVA_DB_NAME=$NOVA_DB_NAME