I have a question very similar to this one: Iptables rule-set so that a docker container can access a service on a host IP where my containers are not being allowed to access the host. The problem with the linked stackoverflow accepted answer is that when i run iptables -I INPUT -i docker0 -j Accept
my containers are still not given access to the host.
when running dc up
docker compose creates a bridged adapter like so:
br-ddc5c71a14aa: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
link/ether 02:42:5e:11:84:5b brd ff:ff:ff:ff:ff:ff
inet 172.20.0.1/16 brd 172.20.255.255 scope global br-ddc5c71a14aa
valid_lft forever preferred_lft forever
inet6 fe80::42:5eff:fe11:845b/64 scope link
valid_lft forever preferred_lft forever
and the iptables are adjusted like so:
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
11722 1171K DOCKER-USER all -- * * 0.0.0.0/0 0.0.0.0/0
11722 1171K DOCKER-ISOLATION-STAGE-1 all -- * * 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- * docker0 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED
0 0 DOCKER all -- * docker0 0.0.0.0/0 0.0.0.0/0
Chain DOCKER (2 references)
pkts bytes target prot opt in out source destination
0 0 ACCEPT tcp -- !br-ddc5c71a14aa br-ddc5c71a14aa 0.0.0.0/0 172.20.0.2 tcp dpt:5432
0 0 ACCEPT tcp -- !br-ddc5c71a14aa br-ddc5c71a14aa 0.0.0.0/0 172.20.0.3 tcp dpt:443
0 0 ACCEPT tcp -- !br-ddc5c71a14aa br-ddc5c71a14aa 0.0.0.0/0 172.20.0.3 tcp dpt:80
Chain DOCKER-ISOLATION-STAGE-1 (1 references)
pkts bytes target prot opt in out source destination
0 0 DOCKER-ISOLATION-STAGE-2 all -- docker0 !docker0 0.0.0.0/0 0.0.0.0/0
5006 280K DOCKER-ISOLATION-STAGE-2 all -- br-ddc5c71a14aa !br-ddc5c71a14aa 0.0.0.0/0 0.0.0.0/0
The only thing that I seem to be able to do to get the containers to access the host is to accept packets from the bridged adapter iptables -I INPUT -i br-ddc5c71a14aa -j ACCEPT
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I'm running fedora 28, Docker version 18.06.1-ce, build e68fc7a, and docker-compose version 1.22.0, build f46880fe. What do i need to do so that docker/docker compose can automatically adjust the iptables to have the host accept packets from the containers?