Update to Ubuntu 26 and Mariadb 11
Shutdown current Container
cd Cacti
docker compose down
cd ..
mv Cacti/docker-compose.yml Cacti/docker-compose.bak
mv Cacti Cacti-old
git clone -b ubuntu_26.04 https://github.com/Its-egner/Cacti.git
mv Cacti-old/cacti_db Cacti
mv Cacti-old/cacti_log Cacti
mv Cacti-old/cacti_plugins Cacti
mv Cacti-old/cacti_rra Cacti
Copy your Passwords from Cacti-old//docker-compose.bak to Cacti/docker-compose.yml
cd Cacti
Edit docker-compose File, change Passwords! and bring Container up.
docker compose up -d