add backup db.sh

backup_db.sh

@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+
+# usage: <script> <container-name> <database-type>
+# 
+# exports the database of a running docker container in a dump in $BACKUP_DIR/$CONTAINER_NAME/
+
+BACKUP_DIR=/DATA/BACKUP/dbdumps
+
+# Check container existence
+
+CONTAINER="$1"
+
+if ! docker ps | grep -q "$CONTAINER"
+then
+  echo "The container $CONTAINER doesn't exist or doesn't run"
+  exit 1
+fi
+
+# Check database type
+
+TYPE="$2"
+
+COMMAND=""
+
+case "$TYPE" in
+  postgresql)
+    POSTGRES_USER=$(docker exec "$CONTAINER" env | grep POSTGRES_USER | cut -d= -f2)
+    COMMAND="pg_dumpall -c -U $POSTGRES_USER"
+    EXTENSION=sql
+    ;;
+  mariadb)
+    MARIADB_USER=$(docker exec "$CONTAINER" env | grep MYSQL_USER | cut -d= -f2)
+    MARIADB_PASSWORD=$(docker exec "$CONTAINER" env | grep MYSQL_PASSWORD | cut -d= -f2)
+    COMMAND="mariadb-dump -u $MARIADB_USER --password=$MARIADB_PASSWORD --all-databases"
+    EXTENSION=sql
+    ;;
+  mongodb)
+    COMMAND="mongodump --archive"
+    EXTENSION=mongodump
+    ;;
+  ldap-config)
+    COMMAND="slapcat -n 0"
+    EXTENSION=config.ldif
+    ;;
+  ldap-content)
+    COMMAND="slapcat -n 1"
+    EXTENSION=content.ldif
+    ;;
+  *)
+    echo "I don't know $TYPE database type."
+    exit 1
+esac
+
+# Ensure directory exists
+
+mkdir -p "$BACKUP_DIR/$CONTAINER"
+
+# Export database
+
+docker exec "$CONTAINER" $COMMAND > "$BACKUP_DIR/$CONTAINER/dump.$EXTENSION"
+exit $?