How to upgrade postgresql database from 10 to 12 without losing data for openproject

Question

My OpenProject management software is installed with default postgresql 10. Currently the postgresql DB is 12, It is having lot of new features.

I want to upgrade my Pos

Answer 1

1. Backup the database
   

   psql --version sudo -u postgres psql pg_dumpall > alldbs.sql
   

   (this command will backup all databases from the postgresql db)

Then exit from postgres user, and:

2. Inside a terminal run these commands:

   sudo systemctl stop postgres
   sudo apt-get install -y postgresql-12 postgresql-server-dev-12 postgresql-contrib-12 libpq-dev postgresql-12-hypopg
   sudo pg_dropcluster 12 main --stop
   sudo pg_upgradecluster 10 main
   sudo pg_dropcluster 10 main --stop
   

3. restart the postgresql service:

   sudo systemctl restart postgresql
   

4. login to the postgres:

   su - postgres
   

5. to check the version:

   psql --version
   

I have done using the above steps and I could update the DBand restore all data.