Docker Default Gateway Container
So, i have a problem where i need to setup all my docker container to a gateway that i have setup not to default gateway from docker network. After a few hours searching, i found it about how to Control and configuring docker with systemd. Why systemd? because the host is using systemd.
There are a number of ways to configure the daemon flags and environment variables for your Docker daemon. The recommended way is to use a systemd drop-in file (as described in the systemd.unit documentation). These are local files named something.conf in the /etc/systemd/system/docker.service.d directory. This could also be /etc/systemd/system/docker.service, which also works for overriding the defaults from /lib/systemd/system/docker.service.
In my case, i reconfigure /lib/systemd/system/docker.service file. In the line of
ExecStart=/usr/bin/dockerd -H fd://
change to
ExecStart=/usr/bin/dockerd -H fd:// –default-gateway=172.31.255.254
in this case, my gateway is 172.31.255.254.
Flush changes:
systemctl daemon-reload
Restart Docker
systemctl restart docker.service
Cheers, Moko who need a water.
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