How to Safely Upgrade Nextcloud in Docker

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Recently, I upgraded my Nextcloud Hub 10 (31.0.7) running in Docker to 31.0.8. The process was smooth once I followed the right steps. Here’s a summary of the procedure, including backups, upgrade commands, and fixing common warnings.

1. Backup Everything

Before upgrading, always back up your database, config, and data:

# Backup the MariaDB database
docker exec -t nextcloud-stack-db-1 mysqldump -u nextcloud -p'YOURPASSWORD' nextcloud > nextcloud_backup.sql

# Backup Nextcloud config (requires sudo because of file ownership)
sudo tar -czvf nextcloud_config_backup.tar.gz ./nextcloud_config

# Backup Nextcloud data
sudo rsync -av /mnt/nextcloud_data/ /mnt/nextcloud_data_backup/

2. Update Nextcloud Container

# Stop containers
docker-compose down

# Pull the latest Nextcloud image
docker-compose pull nextcloud

# Start containers again
docker-compose up -d

3. Run the Upgrade

Run the database migrations and app updates inside the container:

docker exec -it -u www-data nextcloud-stack-nextcloud-1 php occ upgrade
docker exec -it -u www-data nextcloud-stack-nextcloud-1 php occ status

4. Fix Warnings: Missing Indices

If you see warnings like “Detected some missing optional indices”, fix them with:

docker exec -it -u www-data nextcloud-stack-nextcloud-1 php occ db:add-missing-indices

5. Clear Nextcloud Logs

If old errors remain in the admin panel, clear logs:

# Clear logs via occ
docker exec -it -u www-data nextcloud-stack-nextcloud-1 php occ log:manage --clear

# Or truncate the log file directly
sudo truncate -s 0 /mnt/nextcloud_data/nextcloud.log

Done!


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