Help Needed: Upgrading postgres version from postgres:14-alpine to postgres:16-alpine

[jaimedmp]

Is this a feature for the backend or frontend?

Backend

What would you like?

Hi, I need some help or suggestions.

Current Planka version: 1.24.1

In the Planka GitHub repository, the docker-compose.yml file specifies the image for PostgreSQL as:

image: postgres:16-alpine

However, on my premises, it's currently set to:

image: postgres:14-alpine

I would like to update my docker-compose.yml file to use postgres:16-alpine.

• Should I proceed with this update?
• Will Docker Compose handle the upgrade without any issues, or do I need to prepare or adjust anything beforehand?

Thank you for your guidance!

Why is this needed?

N/A

Other information

N/A

[meltyshev]

Hi! We'll add this to the docs soon.

[jaimedmp]

Thank you for your response.

[nbx3]

So these are the steps i followed that worked successfully -

1. Backup your database (x2 to be safe)

docker compose exec postgres pg_dump -U postgres -d planka -cC > upgrade_backup_pg14.sql

2. Shutdown database, create a backup volume and do a volume backup (you may have to adjust names)

docker compose down
docker volume create planka_database_backup
docker run --rm -v docker-planka_db-data:/from -v planka_database_backup:/to alpine sh -c 'cd /from && cp -a . /to'

3. Make sure step 2 is done and you have the sql and data volumes, then remove the old volume (why docker dont add a docker rename volume option..?)

docker volume rm docker-planka_db-data

4. Edit the docker-compose.yml and network_mode: none to the postgres config and change image: postgres:14-alpine to image: postgres:16-alpine

5. Pull the updated image, force recreate postgres database and apply your backup

docker compose pull
docker compose up --force-recreate -d postgres
cat upgrade_backup_pg14.sql | docker compose exec -T postgres psql -U postgres

6. Edit docker-compose.yml and remove the network_mode: none, then rerun the recreate

docker compose up --force-recreate -d

Test!

PS thanks for an awesome open source project

[jaimedmp]

Hi,

I am having an error when I try to run docker compose up --force-recreate -d postgres. I made sure that I follow the previous steps.

postgres-1 |
postgres-1 | PostgreSQL Database directory appears to contain a database; Skipping initialization
postgres-1 |
postgres-1 | 2025-03-02 23:57:08.965 UTC [1] FATAL: database files are incompatible with server
postgres-1 | 2025-03-02 23:57:08.965 UTC [1] DETAIL: The data directory was initialized by PostgreSQL version 14, which is not compatible with this version 16.8.
postgres-1 exited with code 1