initial commit

2015-08-23 18:56:11 -04:00
commit 1fcd7dee4a
8 changed files with 517 additions and 0 deletions
--- a/.editorconfig
+++ b/.editorconfig
@@ -0,0 +1,16 @@
+root = true
+
+[*]
+insert_final_newline = true
+indent_style = space
+indent_size = 2
+
+[Makefile]
+insert_final_newline = true
+indent_style = tab
+indent_size = 4
+
+[*.mk]
+insert_final_newline = true
+indent_style = tab
+indent_size = 4
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -0,0 +1,7 @@
+Copyright (C) 2015 Jose Diaz-Gonzalez
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
--- a/README.md
+++ b/README.md
@@ -0,0 +1,95 @@
+# dokku mysql (beta)
+
+Official mysql plugin for dokku. Currently installs mysql 5.7.
+
+## requirements
+
+- dokku 0.3.25+
+- docker 1.6.x
+
+## installation
+
+```
+cd /var/lib/dokku/plugins
+git clone https://github.com/dokku/dokku-mysql-plugin.git mysql
+dokku plugins-install-dependencies
+dokku plugins-install
+```
+
+## commands
+
+```
+mysql:alias <name> <alias>     Set an alias for the docker link
+mysql:clone <name> <new-name>  NOT IMPLEMENTED
+mysql:connect <name>           Connect via mysql to a mysql service
+mysql:create <name>            Create a mysql service
+mysql:destroy <name>           Delete the service and stop its container if there are no links left
+mysql:export <name>            Export a dump of the mysql service database
+mysql:expose <name> <port>     NOT IMPLEMENTED
+mysql:import <name> <file>     NOT IMPLEMENTED
+mysql:info <name>              Print the connection information
+mysql:link <name> <app>        Link the mysql service to the app
+mysql:list                     List all mysql services
+mysql:logs <name> [-t]         Print the most recent log(s) for this service
+mysql:restart <name>           Graceful shutdown and restart of the service container
+mysql:unexpose <name> <port>   NOT IMPLEMENTED
+mysql:unlink <name> <app>      Unlink the mysql service from the app
+```
+
+## usage
+
+```shell
+# create a mysql service named lolipop
+dokku mysql:create lolipop
+
+# you can also specify the image and image
+# version to use for the service
+# it *must* be compatible with the
+# official mysql image
+export MYSQL_IMAGE="mysql"
+export MYSQL_IMAGE_VERSION="5.5"
+dokku mysql:create lolipop
+
+# get connection information as follows
+dokku mysql:info lolipop
+
+# lets assume the ip of our mysql service is 172.17.0.1
+
+# a mysql service can be linked to a
+# container this will use native docker
+# links via the docker-options plugin
+# here we link it to our 'playground' app
+# NOTE: this will restart your app
+dokku mysql:link lolipop playground
+
+# the above will expose the following environment variables
+#
+#   DATABASE_URL=mysql://mysql:SOME_PASSWORD@172.17.0.1:3306/lolipop
+#   DATABASE_NAME=/playground/DATABASE
+#   DATABASE_PORT=tcp://172.17.0.1:3306
+#   DATABASE_PORT_3306_TCP=tcp://172.17.0.1:3306
+#   DATABASE_PORT_3306_TCP_PROTO=tcp
+#   DATABASE_PORT_3306_TCP_PORT=3306
+#   DATABASE_PORT_3306_TCP_ADDR=172.17.0.1
+
+# you can customize the environment
+# variables through a custom docker link alias
+dokku mysql:alias lolipop MYSQL_DATABASE
+
+# you can also unlink a mysql service
+# NOTE: this will restart your app
+dokku mysql:unlink lolipop playground
+
+# you can tail logs for a particular service
+dokku mysql:logs lolipop
+dokku mysql:logs lolipop -t # to tail
+
+# finally, you can destroy the container
+dokku mysql:destroy playground
+```
+
+## todo
+
+- implement mysql:clone
+- implement mysql:expose
+- implement mysql:import
--- a/286
+++ b/286
@@ -0,0 +1,286 @@
+#!/usr/bin/env bash
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+source "$(dirname "$0")/../common/functions"
+source "$(dirname "$0")/functions"
+
+MYSQL_IMAGE=${MYSQL_IMAGE:="mysql"}
+MYSQL_IMAGE_VERSION=${MYSQL_IMAGE_VERSION:="5.7"}
+MYSQL_ROOT=/var/lib/dokku/services/mysql
+
+PLUGIN_COMMAND_PREFIX="mysql"
+PLUGIN_DATA_ROOT=$MYSQL_ROOT
+PLUGIN_SERVICE="MySQL"
+PLUGIN_IMAGE=$MYSQL_IMAGE
+PLUGIN_IMAGE_VERSION=$MYSQL_IMAGE_VERSION
+
+if [[ ! -d $PLUGIN_DATA_ROOT ]]; then
+  dokku_log_fail "$PLUGIN_SERVICE: Please run: sudo dokku plugins-install"
+fi
+
+if ! command -v mysql &>/dev/null; then
+  dokku_log_fail "$PLUGIN_SERVICE: Please run: sudo dokku plugins-install-dependencies"
+fi
+
+if ! command -v mysqldump &>/dev/null; then
+  dokku_log_fail "$PLUGIN_SERVICE: Please run: sudo dokku plugins-install-dependencies"
+fi
+
+case "$1" in
+  $PLUGIN_COMMAND_PREFIX:alias)
+    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
+    [[ -z $3 ]] && dokku_log_fail "Please specify an alias for the service"
+    verify_service_name "$2"
+    SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"; ALIAS_FILE="$SERVICE_ROOT/ALIAS"
+
+    mkdir -p "$SERVICE_ROOT" || dokku_log_fail "Unable to create service directory"
+    touch "$ALIAS_FILE"
+    echo "$3" > "$ALIAS_FILE"
+    ;;
+
+  $PLUGIN_COMMAND_PREFIX:create)
+    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
+    [[ ! -d "$PLUGIN_DATA_ROOT/$2" ]] || dokku_log_fail "$PLUGIN_SERVICE service $2 already exists"
+    SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"; LINKS_FILE="$SERVICE_ROOT/LINKS"
+
+    if ! docker images | grep -e "^$PLUGIN_IMAGE " | grep -q " $PLUGIN_IMAGE_VERSION " ; then
+      dokku_log_fail "$PLUGIN_SERVICE image $PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION not found"
+    fi
+
+    mkdir -p "$SERVICE_ROOT" || dokku_log_fail "Unable to create service directory"
+    mkdir -p "$SERVICE_ROOT/data" || dokku_log_fail "Unable to create service data directory"
+    rootpassword=$(date +%s | sha256sum | base64 | head -c 16)
+    password=$(date +%s | sha256sum | base64 | head -c 16)
+    echo "$rootpassword" > "$SERVICE_ROOT/ROOTPASSWORD"
+    echo "$password" > "$SERVICE_ROOT/PASSWORD"
+    touch "$LINKS_FILE"
+
+    dokku_log_info1 "Starting container"
+    ID=$(docker run --name "dokku.mysql.$SERVICE" -v "$SERVICE_ROOT/data:/var/lib/mysql" -e "MYSQL_ROOT_PASSWORD=$rootpassword" -e MYSQL_USER=mysql -e "MYSQL_PASSWORD=$password" -e "MYSQL_DATABASE=$SERVICE" -d "$PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION")
+    echo "$ID" > "$SERVICE_ROOT/ID"
+
+    dokku_log_verbose_quiet "Waiting for container to be ready"
+    sleep 10
+
+    dokku_log_info2 "$PLUGIN_SERVICE container created: $SERVICE"
+    dokku "$PLUGIN_COMMAND_PREFIX:info" "$SERVICE"
+    ;;
+
+  $PLUGIN_COMMAND_PREFIX:destroy)
+    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
+    verify_service_name "$2"
+    SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"; LINKS_FILE="$SERVICE_ROOT/LINKS"
+
+    [[ -s "$LINKS_FILE" ]] && dokku_log_fail "Cannot delete linked service"
+
+    [[ "$3" == "force" ]] && DOKKU_APPS_FORCE_DELETE=1
+    if [[ -z "$DOKKU_APPS_FORCE_DELETE" ]]; then
+      dokku_log_warn "WARNING: Potentially Destructive Action"
+      dokku_log_warn "This command will destroy $SERVICE $PLUGIN_SERVICE service."
+      dokku_log_warn "To proceed, type \"$SERVICE\""
+      echo ""
+
+      read -p "> " service_name
+      if [[ "$service_name" != "$SERVICE" ]]; then
+        dokku_log_warn "Confirmation did not match $SERVICE. Aborted."
+        exit 1
+      fi
+    fi
+
+    dokku_log_info1 "Deleting $SERVICE"
+    if [[ -f "$SERVICE_ROOT/ID" ]]; then
+      ID=$(cat "$SERVICE_ROOT/ID")
+
+      dokku_log_verbose_quiet "Deleting container data"
+      docker exec -it "$ID" chmod -R 777 /var/lib/mysql
+
+      dokku_log_verbose_quiet "Stopping container"
+      docker stop "$ID" > /dev/null
+      docker kill "$ID" > /dev/null
+      sleep 1
+
+      dokku_log_verbose_quiet "Removing container"
+      docker rm -v "$ID" > /dev/null
+      sleep 1
+    fi
+
+    dokku_log_verbose_quiet "Removing data"
+    rm -rf "$SERVICE_ROOT"
+
+    dokku_log_info2 "$PLUGIN_SERVICE container deleted: $SERVICE"
+    ;;
+
+  $PLUGIN_COMMAND_PREFIX:link)
+    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
+    [[ -z $3 ]] && dokku_log_fail "Please specify an app to run the command on"
+    verify_app_name "$3"
+    verify_service_name "$2"
+    APP="$3"; SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"; LINKS_FILE="$SERVICE_ROOT/LINKS"
+
+    mkdir -p "$SERVICE_ROOT" || dokku_log_fail "Unable to create service directory"
+    touch "$LINKS_FILE"
+    echo "$APP" >> "$LINKS_FILE"
+    sort "$LINKS_FILE" -u -o "$LINKS_FILE"
+
+    dokku_log_info1 "Restarting app $APP"
+    dokku ps:restart "$APP"
+    ;;
+
+  $PLUGIN_COMMAND_PREFIX:unlink)
+    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
+    [[ -z $3 ]] && dokku_log_fail "Please specify an app to run the command on"
+    verify_app_name "$3"
+    verify_service_name "$2"
+    APP="$3"; SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"; LINKS_FILE="$SERVICE_ROOT/LINKS"
+
+    mkdir -p "$SERVICE_ROOT" || dokku_log_fail "Unable to create service directory"
+    touch "$LINKS_FILE"
+    sed -i "/^$3\$/d" "$LINKS_FILE"
+    sort "$LINKS_FILE" -u -o "$LINKS_FILE"
+
+    dokku_log_info1 "Restarting app $APP"
+    dokku ps:restart "$APP"
+    ;;
+
+  $PLUGIN_COMMAND_PREFIX:export)
+    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
+    verify_service_name "$2"
+    SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
+
+    PASSWORD=$(cat "$SERVICE_ROOT/PASSWORD")
+    IP=$(get_container_ip "$ID")
+
+    mysqldump --host "$IP" --port 3306 --user mysql --password "$PASSWORD" "$SERVICE"
+    ;;
+
+  $PLUGIN_COMMAND_PREFIX:import)
+    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
+    verify_service_name "$2"
+    SERVICE="$2"
+
+    dokku_log_fail "Not yet implemented"
+    ;;
+
+  $PLUGIN_COMMAND_PREFIX:logs)
+    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
+    verify_service_name "$2"
+    SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
+
+    ID=$(cat "$SERVICE_ROOT/ID")
+
+    if [[ $3 == "-t" ]]; then
+      DOKKU_LOGS_ARGS="--follow"
+    else
+      DOKKU_LOGS_ARGS="--tail 100"
+    fi
+
+    docker logs "$DOKKU_LOGS_ARGS" "$ID"
+    ;;
+
+  $PLUGIN_COMMAND_PREFIX:restart)
+    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
+    verify_service_name "$2"
+    SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
+
+    ID=$(cat "$SERVICE_ROOT/ID")
+
+    docker restart --time=10 "$ID"
+    dokku_log_info1 "Please call dokku ps:restart on all linked apps"
+    ;;
+
+  $PLUGIN_COMMAND_PREFIX:connect)
+    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
+    verify_service_name "$2"
+    SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
+
+    ID=$(cat "$SERVICE_ROOT/ID")
+    IP=$(get_container_ip "$ID")
+    PASSWORD=$(cat "$SERVICE_ROOT/PASSWORD")
+    mysql --host "$IP" --port 3306 --user mysql -password "$PASSWORD"
+    ;;
+
+  $PLUGIN_COMMAND_PREFIX:info)
+    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
+    verify_service_name "$2"
+    SERVICE="$2"; SERVICE_URL=$(service_url "$SERVICE")
+
+    echo "       DSN: $SERVICE_URL"
+    ;;
+
+  $PLUGIN_COMMAND_PREFIX:list)
+    CONTAINERS=$(ls $PLUGIN_DATA_ROOT 2> /dev/null)
+    if [[ -z $CONTAINERS ]]; then
+        echo "There are no $PLUGIN_SERVICE services"
+    else
+        echo "$PLUGIN_SERVICE services:"
+        for CONTAINER in $CONTAINERS; do
+            echo "  - $CONTAINER"
+        done
+    fi
+    ;;
+
+  $PLUGIN_COMMAND_PREFIX:clone)
+    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
+    verify_service_name "$2"
+    SERVICE="$2"
+
+    dokku_log_fail "Not yet implemented"
+    ;;
+
+  $PLUGIN_COMMAND_PREFIX:expose)
+    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
+    verify_service_name "$2"
+    SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"; PORT_FILE="$SERVICE_ROOT/PORT"; DESTINATION_FILE="$SERVICE_ROOT/IPTABLES_DESTINATION"
+
+    [[ -f "$PORT_FILE" ]] && PORT=$(cat "$PORT_FILE") && dokku_log_fail "Service $SERVICE already exposed on port $PORT"
+
+    ID=$(cat "$SERVICE_ROOT/ID")
+    IP=$(get_container_ip "$ID")
+    PORT=$(get_random_port)
+    echo "$PORT" > "$PORT_FILE"
+    echo "$IP:3306" > "$DESTINATION_FILE"
+
+    iptables -t nat -A DOCKER -p tcp --dport "$PORT" -j DNAT --to-destination "$IP:3306"
+    dokku_log_info1 "Service $SERVICE exposed on port $PORT"
+    ;;
+
+  $PLUGIN_COMMAND_PREFIX:unexpose)
+    [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
+    verify_service_name "$2"
+    SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"; PORT_FILE="$SERVICE_ROOT/PORT"; DESTINATION_FILE="$SERVICE_ROOT/IPTABLES_DESTINATION"
+
+    [[ ! -f "$PORT_FILE" ]] && dokku_log_fail "Service not exposed"
+
+    ID=$(cat "$SERVICE_ROOT/ID")
+    IP=$(get_container_ip "$ID")
+    PORT=$(cat "$PORT_FILE")
+    DESTINATION=$(cat "$DESTINATION_FILE")
+
+    iptables -t nat -D DOCKER -p tcp --dport "$PORT" -j DNAT --to-destination "$DESTINATION"
+    rm -rf "$PORT_FILE"
+    ;;
+
+  help)
+    cat && cat<<EOF
+    $PLUGIN_COMMAND_PREFIX:alias <name> <alias>, Set an alias for the docker link
+    $PLUGIN_COMMAND_PREFIX:create <name>, Create a $PLUGIN_SERVICE service
+    $PLUGIN_COMMAND_PREFIX:destroy <name>, Delete the $PLUGIN_SERVICE service and stop its container if there are no links left
+    $PLUGIN_COMMAND_PREFIX:link <name> <app>, Link the $PLUGIN_SERVICE service to the app
+    $PLUGIN_COMMAND_PREFIX:unlink <name> <app>, Unlink the $PLUGIN_SERVICE service from the app
+    $PLUGIN_COMMAND_PREFIX:export <name>, Export a dump of the $PLUGIN_SERVICE service database
+    $PLUGIN_COMMAND_PREFIX:import <name> <file>, NOT IMPLEMENTED
+    $PLUGIN_COMMAND_PREFIX:connect <name>, Connect via mysql to a $PLUGIN_SERVICE service
+    $PLUGIN_COMMAND_PREFIX:logs <name> [-t], Print the most recent log(s) for this service
+    $PLUGIN_COMMAND_PREFIX:restart <name>, Graceful shutdown and restart of the service container
+    $PLUGIN_COMMAND_PREFIX:info <name>, Print the connection information
+    $PLUGIN_COMMAND_PREFIX:list, List all $PLUGIN_SERVICE services
+    $PLUGIN_COMMAND_PREFIX:clone <name> <new-name>, NOT IMPLEMENTED
+    $PLUGIN_COMMAND_PREFIX:expose <name> <port>, NOT IMPLEMENTED
+    $PLUGIN_COMMAND_PREFIX:unexpose <name> <port>, NOT IMPLEMENTED
+EOF
+    ;;
+
+  *)
+    exit "$DOKKU_NOT_IMPLEMENTED_EXIT"
+    ;;
+
+esac
--- a/14
+++ b/14
@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+
+case "$DOKKU_DISTRO" in
+  ubuntu)
+    export DEBIAN_FRONTEND=noninteractive
+    apt-get update
+    apt-get install -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" --force-yes -qq -y mysql-client-5.5
+    ;;
+
+  opensuse)
+    zypper -q in -y mysql-client
+    ;;
+esac
--- a/27
+++ b/27
@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+source "$(dirname "$0")/../common/functions"
+source "$(dirname "$0")/functions"
+
+STDIN=$(cat)
+APP="$1"
+PLUGIN_DATA_ROOT=/var/lib/dokku/services/mysql
+
+output=""
+for i in $PLUGIN_DATA_ROOT/*; do
+  [[ -d $i ]] || continue
+  SERVICE=$(echo "$i" | cut -d'/' -f 7)
+  LINKS_FILE="$PLUGIN_DATA_ROOT/$SERVICE/LINKS"
+  ALIAS="$(service_alias "$SERVICE")"
+  SERVICE_URL="$(service_url "$SERVICE")"
+  if [[ -f "$LINKS_FILE" ]]; then
+    while read line; do
+      if [[ "$line" == "$APP" ]]; then
+        output="$output --link dokku.mysql.$SERVICE:$ALIAS --env ${ALIAS}_URL=$SERVICE_URL"
+        break
+      fi
+    done < "$LINKS_FILE"
+  fi
+done
+
+echo "$STDIN$output"
--- a/54
+++ b/54
@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+
+PLUGIN_DATA_ROOT=/var/lib/dokku/services/mysql
+PLUGIN_SERVICE="MySQL"
+
+get_random_port() {
+  local port=$RANDOM
+  local quit=0
+
+  while [ "$quit" -ne 1 ]; do
+    netstat -a | grep $port >> /dev/null
+    if [ $? -gt 0 ]; then
+      quit=1
+    else
+      port=$((port + 1))
+    fi
+  done
+  echo $port
+}
+
+get_container_ip() {
+  docker inspect --format '{{ .NetworkSettings.IPAddress }}' "$1"
+}
+
+verify_service_name() {
+  local SERVICE="$1"
+  [[ ! -n "$SERVICE" ]] && dokku_log_fail "(verify_service_name) SERVICE must not be null"
+  [[ ! -d "$PLUGIN_DATA_ROOT/$SERVICE" ]] && dokku_log_fail "$PLUGIN_SERVICE service $SERVICE does not exist"
+  return 0
+}
+
+service_alias() {
+  local SERVICE="$1"
+  local ALIAS_FILE="$PLUGIN_DATA_ROOT/$SERVICE/ALIAS"
+
+  verify_service_name "$1"
+  if [[ -f "$ALIAS_FILE" ]]; then
+    cat "$ALIAS_FILE"
+  else
+    echo "DATABASE"
+  fi
+}
+
+service_url() {
+  local SERVICE="$1";
+  local SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
+  verify_service_name "$1"
+
+  local ID="$(cat "$SERVICE_ROOT/ID")"
+  local IP="$(get_container_ip "$ID")"
+  local PASSWORD="$(cat "$SERVICE_ROOT/PASSWORD")"
+  echo "mysql://mysql:$PASSWORD@$IP:3306/$SERVICE"
+}
--- a/18
+++ b/18
@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+
+MYSQL_IMAGE="mysql"
+MYSQL_IMAGE_VERSION=5.7
+MYSQL_ROOT=/var/lib/dokku/services/mysql
+
+PLUGIN_DATA_ROOT=$MYSQL_ROOT
+PLUGIN_SERVICE="MySQL"
+PLUGIN_IMAGE=$MYSQL_IMAGE
+PLUGIN_IMAGE_VERSION=$MYSQL_IMAGE_VERSION
+
+if ! docker images | grep -e "^$PLUGIN_IMAGE " | grep -q $PLUGIN_IMAGE_VERSION ; then
+  docker pull $PLUGIN_IMAGE:$PLUGIN_IMAGE_VERSION
+fi
+
+mkdir -p $PLUGIN_DATA_ROOT || echo "Failed to create $PLUGIN_SERVICE directory"
+chown dokku:dokku $PLUGIN_DATA_ROOT