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Hello hy_galen,
When you use network_mode=host
, your containers will use the underlying host's network namespace. Therefore, it is equivalent to running your application on an EC2 instance wrt networking.
If you do not specify the above parameter, your containers running in the swarm cluster will be connected to the underlying host's docker_gwbridge
network by default. I believe the issue could be related to the docker network setup in your swarm cluster.
Docker modifies the iptables on your nodes to provide network isolation. If you have configured docker daemon settings in /etc/docker/daemon.json
, make sure you have not set iptables=false
as this will break your container networking. For more info, refer this doc.
I found a stackoverflow issue that is similar to yours. Try to follow the steps provided and see if it helps in finding the root cause.
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