Centos VM with Docker getting host unreachable when trying to connect to itself
FYI, I resolved the problem on centos by using the default "bridged" containers provided by Docker, but adding the following to my firewalld configuration:
firewall-cmd --permanent --zone=trusted --add-interface=docker0firewall-cmd --reloadservice firewalld restartYou might also need to open up a port to allow external communication, like so:
firewall-cmd --zone=public --add-port=8080/tcp --permanent
My solution was to switch to an Ubuntu VM, because switching my docker compose to the default "bridged" network broke my aliases, which I really needed
The only remaining question here is why after configuring firewalld, a user-configured network on docker-compose cannot access the external IP, forcing us to switch to the default bridged network