Allow docker to access all containers within host with firewall-cmd rich rule in Centos 7

firewall-cmd-rich-rule.md

firewall-cmd --permanent --zone=public --add-rich-rule='
  rule family="ipv4"
  source address="192.168.0.0/16"
  port protocol="tcp" port="8080" accept'

Source: https://major.io/2014/11/24/trust-ip-address-firewallds-rich-rules/

Add interface docker0 to zone trusted

firewall-cmd --permanent --zone=trusted --change-interface=docker0

Add rich rule

firewall-cmd --zone=trusted --add-rich-rule='rule family="ipv4" source address="172.17.0.0/16" accept'

Reload firewall-cmd

firewall-cmd --reload