Sock Shop deployed to Docker Swarm does not work

The Problem

As someone reported on the Weave Users Slack group, the deployment with Docker Swarm is broken.

Here’s a screenshot of how it looks when trying to access the shop via the browser:

To reproduce the error one simply needs to follow our official guide to deploy the Sock Shop to Docker Swarm

Setting up Docker Swarm, bundling the shop with Docker Compose and deploying the service works good. It’s only during runtime that one gets this error.

Errors

When querying the catalogue service, this is the response:

$ curl http://localhost:30000/catalogue?size=5
{"message":"getaddrinfo ENOTFOUND catalogue catalogue:80","error":{"code":"ENOTFOUND","errno":"ENOTFOUND","syscall":"getaddrinfo","hostname":"catalogue","host":"catalogue","port":80}}

A similar error is returned for the cart service

$ curl http://localhost:30000/cart
{"message":"getaddrinfo ENOTFOUND carts carts:80","error":{"code":"ENOTFOUND","errno":"ENOTFOUND","syscall":"getaddrinfo","hostname":"carts","host":"carts","port":80}}

Specs

My system:

macOS Sierra 10.12.4
$ docker version
Client:
 Version:      17.03.1-ce
 API version:  1.27
 Go version:   go1.7.5
 Git commit:   c6d412e
 Built:        Tue Mar 28 00:40:02 2017
 OS/Arch:      darwin/amd64

Server:
 Version:      17.03.1-ce
 API version:  1.27 (minimum version 1.12)
 Go version:   go1.7.5
 Git commit:   c6d412e
 Built:        Fri Mar 24 00:00:50 2017
 OS/Arch:      linux/amd64
 Experimental: true

[patrickse]

I´ve got the same behaviour with kubernetes… the carts and catalogue services can´t find their databases…

com.mongodb.MongoSocketException: carts-db: Try again
        at com.mongodb.ServerAddress.getSocketAddress(ServerAddress.java:188) ~[mongodb-driver-core-3.2.2.jar!/:na]
        at com.mongodb.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:50) ~[mongodb-driver-core-3.2.2.jar!/:na]
        at com.mongodb.connection.SocketStream.open(SocketStream.java:58) ~[mongodb-driver-core-3.2.2.jar!/:na]
        at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:114) ~[mongodb-driver-core-3.2.2.jar!/:na]
        at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:128) ~[mongodb-driver-core-3.2.2.jar!/:na]
        at java.lang.Thread.run(Thread.java:745) [na:1.8.0_111-internal]
Caused by: java.net.UnknownHostException: carts-db: Try again
        at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method) ~[na:1.8.0_111-internal]
        at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928) ~[na:1.8.0_111-internal]
        at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323) ~[na:1.8.0_111-internal]
        at java.net.InetAddress.getAllByName0(InetAddress.java:1276) ~[na:1.8.0_111-internal]
        at java.net.InetAddress.getAllByName(InetAddress.java:1192) ~[na:1.8.0_111-internal]
        at java.net.InetAddress.getAllByName(InetAddress.java:1126) ~[na:1.8.0_111-internal]
        at java.net.InetAddress.getByName(InetAddress.java:1076) ~[na:1.8.0_111-internal]
        at com.mongodb.ServerAddress.getSocketAddress(ServerAddress.java:186) ~[mongodb-driver-core-3.2.2.jar!/:na]
        ... 5 common frames omitted

ts=2017-06-13T11:49:03Z caller=main.go:108 Error="Unable to connect to Database" DSN=catalogue_user:default_password@tcp(catalogue-db:3306)/socksdb

[keltik85]

root@my-pc~# microk8s.enable dns made it work