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Update service_create.md 

More info on endpoint setting, and service discovery on swarm mode overlay network.

Signed-off-by: Richard Mathie <richard.mathie@amey.co.uk>
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Richard Mathie 2016-08-04 17:56:59 +01:00 committed by Tibor Vass
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@ -178,6 +178,45 @@ $ docker service create \
redis:3.0.6
```
### Container networking
The containers provisioned in docker swarm mode can be accessed in service discovery either via a Virtual IP (VIP) and routed through the docker swarm ingress overlay network. Or via a DNS round robbin (DNSRR). This configuration is set using the `--endpoint-mode [vip|dnsrr]` setting. Note that dnsrr is incompatible with `--published` ports.
### Service discovery
Discovering other service from within a container can be ac hived via DNS lookup, but you will get different results depending on whether you want the actual service IPs, or the VIP's.
```
~> nslookup service
Address: 10.255.0.7 # this is the VIP on the ingress network
~> nslookup tasks.service
Non-authoritative answer:
Name: tasks.service
Address: 10.255.0.26 # this is the real IP of a service on the ingress network
Name: tasks.service
Address: 10.255.0.27
Name: tasks.service
Address: 10.255.0.24
~> nslookup tasks.service.your_net
Name: tasks.service.your_net
Address: 10.0.0.29 # service 1 IP on your net
Name: tasks.service.your_net
Address: 10.0.0.26 # service 2 IP on your net
Name: tasks.service.your_net
Address: 10.0.0.28 # service 3 IP on your net
~> nslookup service.your_net
Non-authoritative answer:
Name: service.your_net
Address: 10.0.0.25 # VIP on your net
```
## Related information
* [service inspect](service_inspect.md)