I am trying to start a multihost swarm.on Centos using proxy
The containers are able to communicate with one another without any issues when they are on a single host. But if they are spread across the hosts, they fail to communicate.
However this failure is isolated to application related connectivity only.
I use docker-compose V3 to deploy a stack with multiple services on multihost setup.
If I have my tomcat container (C1) on host (H1) and my mysql container (C2) on host (H2). The the following works :
I am able to ping C2 from C1 using the service name specified in my docker-compose file. This properly resolves to the overlay network IP range
I am also able to telnet to port 3306 of C2 from C1 and am able to see the overlay IP of the foriegn host on my C2 netstat.
I have a test page on C1 which is accessible from C2 via curl on port 80
However the following doesnt work (unless I keep both containers C1 and C2 in the same host H1/H2)
I am unable to view the test page from C1 on C2 via port 443 (https using curl - also tried with -k )
The tomcat container (C1) is unable to communicate with mysql (C2) when jdbc tries the connection string.
Additonal Notes :
I am able to run the same multihost setup on another environment without proxy.
Hence is this an issue with proxy?
Does this have to do with enableing ipv6/ipv4 with relation to the proxy.
Any pointers will be helpful.