Error message "MySQL server is not available. Waiting 5 seconds" fresh docker install

[still_at_work]

Hi,

I'm new with Zabbix

I'm trying to replace my old PRTG with a new instance of Zabbix. I made installation with this documentation : 5 Installation from containers (zabbix.com) but I have an error...

When I launch this command :

docker compose -f ./docker-compose_v3_alpine_mysql_latest.yaml up

It stuck on :

zabbix-docker-zabbix-server-1           | **** MySQL server is not available. Waiting 5 seconds...
zabbix-docker-zabbix-web-nginx-mysql-1  | **** MySQL server is not available. Waiting 5 seconds...
zabbix-docker-zabbix-server-1           | **** MySQL server is not available. Waiting 5 seconds...
zabbix-docker-zabbix-web-nginx-mysql-1  | **** MySQL server is not available. Waiting 5 seconds...
zabbix-docker-zabbix-server-1           | **** MySQL server is not available. Waiting 5 seconds...
zabbix-docker-zabbix-web-nginx-mysql-1  | **** MySQL server is not available. Waiting 5 seconds...​

I also try with alpine+pgsql, same result...

What is wrong ? I searched on forum, but no luck for the moment...

Thank you for your help !

[still_at_work]

Hi, some new after few days...

I found that firewalld blocked traffic between dockers...

I uninstalled firewalld, installed ufw, reboot and all is OK now !