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+# Manual and Help
+
+## Upgrade Postgrs to newer Version (i.e. 15 to 16)
+
+
+### 1. Copy Service 
+
+1.1 Copy whole service definition in docker-compose.yaml  
+1.2 Rename old service to *-old  
+1.3 Move path from new service to i.e postgres16  
+1.4 Set postgres version explicit to new version
+
+Example:
+```
+  databasedb-old:
+    image: postgres:${POSTGRES_VERSION}
+    volumes:
+      - ${VOLUMES_PATH}/databasedb:/var/lib/postgresql/data
+    environment:
+      - POSTGRES_DB=${POSTGRES_DB}
+      - POSTGRES_USER=${POSTGRES_USER}
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
+
+  databasedb:
+    image: postgres:16
+    volumes:
+      - ${VOLUMES_PATH}/databasedb16:/var/lib/postgresql/data
+    environment:
+      - POSTGRES_DB=${POSTGRES_DB}
+      - POSTGRES_USER=${POSTGRES_USER}
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
+```
+
+### 2. Move data
+Backup data from service one to new servic with the following command: 
+```
+docker exec old-service pg_dumpall -U dbuser | docker exec -i new-service psql -U dbuser -d database
+```
+
+### 3. Set password
+```
+docker exec -i monitoring-databasedb-1 psql -U dbuser -d database -c "ALTER USER \"dbuser\" PASSWORD 'secret';"
+```
+
+### 4. Test
+```docker compose up -d``` and check if service is correctly running.
+
+### 5. Cleanup
+5.1 Remove old service in docker-compose.yaml  
+5.2 Set explicit version again to ${POSTGRES_VERSION} and adopt .env file  
+5.4 remove old volume dir
+
+
+### 6. May be move Data dir
+6.1. ```docker compose down```  
+6.2 ```mv /mnt/dockervolumes/databasedb16 /mnt/dockervolumes/databasedb```  
+6.3 docker-compose.yaml anpassen  
+6.1. ```docker compose up -d```
+
+
+
+