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Ben Edwards
Asked: 2020-05-04 04:33:59 +0800 CST

Geting docker to use secondary IP (specify which IP docker uses)

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I have 2 IPs on my server. The main one and an additional one. 

2: enp7s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 2c:4d:54:43:92:df brd ff:ff:ff:ff:ff:ff
inet 111.222.204.107/22 brd 213.171.207.255 scope global enp7s0
   valid_lft forever preferred_lft forever
inet 111.222.205.143/22 brd 213.171.207.255 scope global secondary enp7s0:0
   valid_lft forever preferred_lft forever
inet6 fe80::2e4d:54ff:fe43:92df/64 scope link
   valid_lft forever preferred_lft forever

(ive changed the first two parts of the IP for security)

Currently, docker is using the main IP (111.222.204.107 / enp7s0) but I would like it to use the secondary one (111.222.205.143/enp7s0:0).

How best to achieve this. Changing it 'globally' for docker would be great but if I could create docker network and specify the IP for this that would be fine. A third least good option would be to set the IP in docker-compose but would rather do it globaly or for a network.

By 'docker uses' I mean accepts traffic coming from/and sends traffic to the primary IP.

It would be also good to get advice on how to set up IP tables when I do this but I can cross that bridge when I get to it.

I've been struggling with this one for a few days.

docker

0 Answers