We have a networking problem in Docker-swarm. The problem is below;
- we have virtualized environment over wmware ( vsphere 6.02)
- our servers are created from vmware say server1 and server2
- we have a docker compose file defining a couple of services
- we have an overlay-network definition within docker-compose for docker-swarm
- when we deploy system using docker-swarm deployment is finished successfully, all containers gets ip from overlay network range.
- But the problem is if 2 containers (say cnt1 and cnt2) are deployed to different servers they can not ping each other
- I check tcpdump and see that ARP communication is successfull so they know each other mac correctly
- But when you try to ping to container, ICMP Echo messages are send but are not delivered to second machine..
Where should I check, any advices?
server-1:~$ docker version
Client:
Version: 17.03.0-ce
API version: 1.26
Go version: go1.7.5
Git commit: 3a232c8
Built: Tue Feb 28 08:01:32 2017
OS/Arch: linux/amd64
Server:
Version: 17.03.0-ce
API version: 1.26 (minimum version 1.12)
Go version: go1.7.5
Git commit: 3a232c8
Built: Tue Feb 28 08:01:32 2017
OS/Arch: linux/amd64
Experimental: true
Any help will be appriciated, thanks.