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Tim Hockin
2015-07-17 15:35:41 -07:00
parent aacc4c864c
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docs/user-guide/connecting-applications.md
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@@ -30,6 +30,7 @@ Documentation for other releases can be found at
<!-- END STRIP_FOR_RELEASE -->
<!-- END MUNGE: UNVERSIONED_WARNING -->
# Kubernetes User Guide: Managing Applications: Connecting applications
**Table of Contents**
@@ -161,6 +162,7 @@ You should now be able to curl the nginx Service on `10.0.116.146:80` from any n
Kubernetes supports 2 primary modes of finding a Service - environment variables and DNS. The former works out of the box while the latter requires the [kube-dns cluster addon](../../cluster/addons/dns/README.md).
### Environment Variables
When a Pod is run on a Node, the kubelet adds a set of environment variables for each active Service. This introduces an ordering problem. To see why, inspect the environment of your running nginx pods:
```shell
@@ -186,6 +188,7 @@ NGINXSVC_SERVICE_PORT=80
```
### DNS
Kubernetes offers a DNS cluster addon Service that uses skydns to automatically assign dns names to other Services. You can check if it’s running on your cluster:
```shell