srv-scripts/sbin/vol-compress

#!/bin/bash

#
# Run this script as root inside a service directory.
#

if [ ! -d "volumes" ]; then
  echo 'There is no data to archive ! Make sure you are in a service directory with persistent data (ie. must be a "volumes" directory there).'
  exit
fi

# Dump mysql
if [ -d "volumes/mysql" ]; then
  CONTAINER_NAME=$(echo ${PWD##*/} | sed -e 's/\.//g')_mariadb
  DB_USER=$(nerdctl exec $CONTAINER_NAME bash -c 'echo "$MYSQL_USER"')
  DB_PASSWORD=$(nerdctl exec $CONTAINER_NAME bash -c 'echo "$MYSQL_PASSWORD"')
  DB_NAME=$(nerdctl exec $CONTAINER_NAME bash -c 'echo "$MYSQL_DATABASE"')
  DUMP_NAME=$CONTAINER_NAME.sql
  nerdctl exec -e MYSQL_PWD=$DB_PASSWORD $CONTAINER_NAME mariadb-dump -u $DB_USER $DB_NAME > volumes/$DUMP_NAME
fi

# Dump postgres
if [ -d "volumes/postgres" ]; then
  CONTAINER_NAME=$(echo ${PWD##*/} | sed -e 's/\.//g')_postgres
  DB_USER=$(nerdctl exec $CONTAINER_NAME bash -c 'echo "$POSTGRES_USER"')
  DB_PASSWORD=$(nerdctl exec $CONTAINER_NAME bash -c 'echo "$POSTGRES_PASSWORD"')
  DB_NAME=$(nerdctl exec $CONTAINER_NAME bash -c 'echo "$POSTGRES_DATABASE"')
  DUMP_NAME=$CONTAINER_NAME.sql
  nerdctl exec -e PGPASSWORD=$DB_PASSWORD $CONTAINER_NAME pg_dump -U $DB_USER $DB_NAME > volumes/$DUMP_NAME
fi

# Compress all volumes excerpt mysql and postgres
BACKUP=${PWD##*/}.tar.zst
tar --zstd -cf /tmp/$BACKUP -C volumes .

# Put it into the storage box (pubkey needed)
STORAGE_BOX=u442569@u442569.your-storagebox.de
TODAY=$(date +%F)
ssh -p23 $STORAGE_BOX "mkdir -p $TODAY"
scp -P 23 /tmp/$BACKUP $STORAGE_BOX:/home/$TODAY

# Clean
if [ -f "volumes/$DUMP_NAME" ]; then
  rm volumes/$DUMP_NAME
fi
rm /tmp/$BACKUP