diff --git a/docs/operations/migrating/docker/postgresql-migration.md b/docs/operations/migrating/docker/postgresql-migration.md
index b4017f1864..771a3af150 100644
--- a/docs/operations/migrating/docker/postgresql-migration.md
+++ b/docs/operations/migrating/docker/postgresql-migration.md
@@ -1,6 +1,6 @@
 # Migrating your Docker OpenProject database to PostgreSQL
 
-This guide will migrate your docker-based MySQL installation to a PostgreSQL installation using [pgloader](https://github.com/dimitri/pgloader). 
+This guide will migrate your docker-based MySQL installation to a PostgreSQL installation using [pgloader](https://github.com/dimitri/pgloader).
 
 ## Backing up
 
@@ -112,3 +112,17 @@ docker run -it \
 
 
 This will perform all necessary steps to perform the migration. Afterwards, simply remove the `MYSQL_DATABASE_URL`environment variable again and start your container as usual.
+
+### Migrating from an old MySQL database
+
+The script described above reuqires at least OpenProject 8 to work properly.
+If you are still on an older OpenProject version you have to migrate to OpenProject 8 first.
+
+To make this easier there is a script which automates that too.
+It's included in the docker image itself but will want to run it directly on the docker host.
+To do that you can either copy it onto your system from `/app/script/migration/migrate-from-pre-8.sh`
+or simpy download it [here](https://github.com/opf/openproject/tree/release/10.3/script/migration/migrate-from-pre-8.sh).
+
+All the script needs is a docker installation. It will start containers as required for the migration and clean them up afterwards.
+The result of the migration will be a SQL dump of OpenProject in the current version (10.3).
+This can then be imported into the actual OpenProject setup.
diff --git a/script/migration/migrate-from-pre-8.sh b/script/migration/migrate-from-pre-8.sh
new file mode 100644
index 0000000000..2349c3bbf6
--- /dev/null
+++ b/script/migration/migrate-from-pre-8.sh
@@ -0,0 +1,232 @@
+#!/bin/bash
+
+# This script is used to migrate an OpenProject (<= 8) database in MySQL to 10.x in Postgres.
+# All that's needed is docker. The result will be a SQL dump to the current directory.
+#
+# We do the MySQL-to-Postgres migration because in the old OpenProject packages MySQL
+# used to be the standard database. If you are already running on Postgres this script won't work as it is.
+# For it to work it you will have to use postgres in every step and remove the line
+# containing MYSQL_DATABASE_URL.
+#
+# We may adapt the script in the future so it supports both scenarios out-of-the-box.
+
+if [[ -z "$1" ]] || [[ -z "$2" ]]; then
+  echo
+  echo "  usage: bash migrate-from-pre-8.sh <docker host IP> <MySQL dump>"
+  echo
+  echo "  example: bash migrate-from-pre-8.sh 192.168.1.42 /var/db/openproject/backups/dump.sql"
+  echo
+  exit 1
+fi
+
+SECONDS=0
+
+DOCKER_HOST_IP=$1
+MYSQL_DUMP_FILE=$2
+
+MYSQL_CONTAINER=opmysql
+POSTGRES_CONTAINER=oppostgres
+OP7_CONTAINER=op7
+OP8_CONTAINER=op8
+OP10_CONTAINER=op10
+
+REMOVE_CONTAINERS=true
+
+POSTGRES_PORT=5439
+MYSQL_PORT=3305 # has to be free on localhost
+MYSQL_USER=root
+export MYSQL_PWD=root # export to be used by mysql client
+DATABASE=fitopenproject
+
+SKIP_STEP_1=false
+MIGRATION_TIMEOUT_S=600 # wait at most 10 minutes for the migration from 8 to 10 to finish
+
+if [[ ! "$SKIP_STEP_1" = "true" ]]; then
+  # STEP 1: Migrate from current (7) to 8 still in a MySQL database
+  echo
+  echo "1) Migrate to 8 in MySQL"
+
+  echo
+  echo "1.1) Starting mysql database..."
+  if [[ ! `docker ps | grep $MYSQL_CONTAINER` ]]; then
+    docker run -p $MYSQL_PORT:3306 -d --name $MYSQL_CONTAINER -e MYSQL_ROOT_PASSWORD=$MYSQL_PWD mysql:5.6
+    if [[ $? -gt 0 ]]; then exit 1; fi
+    sleep 10
+    echo "  database started"
+  else
+    echo "  already running"
+  fi
+
+  echo
+  echo "1.2) Starting OpenProject 7"
+  if [[ ! `docker ps | grep $OP7_CONTAINER` ]]; then
+    docker run -d --name $OP7_CONTAINER openproject/community:7 # can use `run -it` directly because the image doesn't support it yet in version 8
+    if [[ $? -gt 0 ]]; then exit 1; fi
+    echo "  OpenProject started"
+  else
+    echo "  OpenProject already running"
+  fi
+
+  echo
+  echo "1.3) Starting OpenProject 8"
+  if [[ ! `docker ps | grep $OP8_CONTAINER` ]]; then
+    docker run -d --name $OP8_CONTAINER openproject/community:8 # can use `run -it` directly because the image doesn't support it yet in version 8
+    if [[ $? -gt 0 ]]; then exit 1; fi
+    echo "  OpenProject started"
+  else
+    echo "  OpenProject already running"
+  fi
+
+  echo
+  echo "1.4) Creating MySQL database for migration from OP 7 to 8"
+  echo "drop database if exists $DATABASE; create database $DATABASE;" | mysql -uroot -h 127.0.0.1 -P $MYSQL_PORT
+
+  if [[ $? -gt 0 ]]; then
+    echo "  Could not create database"
+    exit 1
+  else
+    echo "  Created database"
+  fi
+
+  echo
+  echo "1.5) Importing MySQL dump ($MYSQL_DUMP_FILE)"
+
+  cat $MYSQL_DUMP_FILE | mysql -uroot -h 127.0.0.1 -P $MYSQL_PORT $DATABASE
+
+  if [[ $? -gt 0 ]]; then
+    echo "  Could not import database"
+    exit 1
+  else
+    echo "  Imported database"
+  fi
+
+  echo
+  echo "1.6) Migrating database from 6 to 7 ... (NOOP if already on 7)"
+
+  docker exec -it $OP7_CONTAINER /bin/sh -c "DATABASE_URL=mysql2://$MYSQL_USER:$MYSQL_PWD@$DOCKER_HOST_IP:$MYSQL_PORT/$DATABASE bundle exec rake db:migrate"
+
+  if [[ $? -gt 0 ]]; then
+    echo "  Could not migrate database"
+    exit 1
+  else
+    echo "  Migrated database"
+  fi
+
+  # Sometimes very old databases may not have all schema migrations recorded
+  # even though the respective migrations were executed. If this is the case
+  # you can uncomment this step and adjust it to insert the missing versions.
+  #
+  # echo
+  # echo "1.6.1) Fixing schema migrations"
+  #
+  # echo '
+  # INSERT INTO schema_migrations (version) VALUES
+  #   (20110224000000), (20110226120112)
+  # ;
+  # ' | mysql -uroot -h 127.0.0.1 -P $MYSQL_PORT $DATABASE
+  #
+  # if [[ $? -gt 0 ]]; then
+  #   echo "  Could not fix schema migrations"
+  #   exit 1
+  # else
+  #   echo "  Fixed schema migrations"
+  # fi
+
+  echo
+  echo "1.7) Migrating database from 7 to 8 ... (NOOP if already on 8)"
+
+  docker exec -it $OP8_CONTAINER /bin/sh -c "DATABASE_URL=mysql2://$MYSQL_USER:$MYSQL_PWD@$DOCKER_HOST_IP:$MYSQL_PORT/$DATABASE bundle exec rake db:migrate"
+
+  if [[ $? -gt 0 ]]; then
+    echo "  Could not migrate database"
+    exit 1
+  else
+    echo "  Migrated database"
+  fi
+
+  echo
+  echo "1.8) Dumping intermediate database in version 8 ..."
+
+  mysqldump -uroot -h 127.0.0.1 -P $MYSQL_PORT $DATABASE > $DATABASE-dump-8.sql
+
+  if [[ $? -gt 0 ]]; then
+    echo "  Could not dump database"
+    exit 1
+  else
+    echo "  Dumped database"
+  fi
+fi
+
+# STEP 2: Migrate from 8 to 10 (latest)
+echo
+echo "2) Migrate from 8 to 10 and from MySQL to Postgres"
+
+echo
+echo "2.1) Starting postgres database"
+
+if [[ ! `docker ps | grep $POSTGRES_CONTAINER` ]]; then
+  docker run -p $POSTGRES_PORT:5432 -d --name $POSTGRES_CONTAINER -e POSTGRES_PASSWORD=postgres postgres:9.6
+  if [[ $? -gt 0 ]]; then exit 1; fi
+  sleep 10
+  echo "  database started"
+else
+  echo "  database already running"
+fi
+
+echo
+echo "2.2) Migrating from MySQL to Postgres (and 8 to 10)"
+
+docker run \
+  --rm \
+  --name migrate8to10 \
+  -e MYSQL_DATABASE_URL="mysql2://$MYSQL_USER:$MYSQL_PWD@$DOCKER_HOST_IP:$MYSQL_PORT/$DATABASE" \
+  -e DATABASE_URL="postgresql://postgres:postgres@$DOCKER_HOST_IP:$POSTGRES_PORT/$DATABASE" \
+  -e FORCE_YES=true \
+  -t openproject/community:b007c71494a76924396ad0b168ba733471e3e326 \
+  > migration.log &
+
+# wait for migration to finish...
+( timeout --preserve-status $MIGRATION_TIMEOUT_S tail -f -n0 migration.log & ) | grep -q "completed"
+MIGRATION_STATUS=$?
+
+if [[ $MIGRATION_STATUS -gt 0 ]]; then
+  echo "  migration unsuccessful. Please check migration.log"
+  exit 1
+else
+  echo "  migration SUCCESSFUL!"
+fi
+
+echo
+echo "2.3) Dumping migrated database to $DATABASE-migrated.sql"
+
+# using the running docker image to dump the database to ensure we use the same
+# postgres client version and also so that a postgres client is not necessary to run this script
+docker exec -e PGPASSWORD=postgres -it migrate8to10 pg_dump \
+  -h $DOCKER_HOST_IP \
+  -p $POSTGRES_PORT \
+  -U postgres \
+  -d $DATABASE \
+  > $DATABASE-migrated.sql
+
+if [[ $? -gt 0 ]]; then
+  echo "  Could not dump database"
+  exit 1
+else
+  echo "  Dumped database"
+fi
+
+if [[ ! "$REMOVE_CONTAINERS" = "false" ]]; then
+  echo
+  echo "Cleaning up used docker containers..."
+
+  # ... and then kill it (there is no one-off command for the migration in the docker container yet
+  # and running it via docker run doesn't work since the user has to be root and not the app user)
+  docker stop migrate8to10
+
+  docker stop $MYSQL_CONTAINER && docker rm $MYSQL_CONTAINER
+  docker stop $OP7_CONTAINER && docker rm $OP7_CONTAINER
+  docker stop $OP8_CONTAINER && docker rm $OP8_CONTAINER
+  docker stop $POSTGRES_CONTAINER && docker rm $POSTGRES_CONTAINER
+fi
+
+echo "Finished after $(($SECONDS / 60)) minutes."