Solve Zabbix “Too many connections”

If you’re running Zabbix in Docker, and you see the Database error “Too many connections”, edit your docker-compose.yml as follows:

nano docker-compose.yml

Under the mysql-server section under volumes, add the following volume:

- /zabbix_folder_on_disk/zabbix-mysql-conf:/etc/mysql/conf.d:rw

nano /zabbix_folder_on_disk/zabbix-mysql-conf/10_my_tweaks.cnf

Paste the following:

[mysqld]
max_connections = 5000

Restart the mysql container:

docker restart zabbix-mysql-server-1