endpoint-mode dnsrr not working?

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
32/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
docker, go
Domain
networking

Research direction

Start by reproducing the docker service create command with --endpoint-mode dnsrr on the stated Docker 1.12.0-rc2 environment, then inspect why the service reports 0/2 replicas. Done means the service reaches 2/2 replicas and the containers are accessible through node-ip:8000 while using dnsrr.

Written by the indexing model from the issue text.

Description

When I create the service as follows:

docker service create --replicas 2 --network mynet --name whoami -p 8000:8000 --endpoint-mode dnsrr jwilder/whoami

I cannot access the containers using node-ip:8000. docker service always shows 0 replicas running.

$ docker service ls
ID NAME REPLICAS IMAGE COMMAND
8t2el9i65b3b whoami 0/2 jwilder/whoami

Things work just fine when I don't use --endpoint-mode parameter?

I am testing with 1.12.0-rc2.

I don't particularly care for the vip option as I only wanted to expose a service externally. Any ideas what could be amiss?

Dominant language
Go
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