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Merge pull request #36 from donnemartin/mad01-change-zookeeper-as-sd 

Update service discovery section to include consul, etcd, and additional details
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Donne Martin 2017-03-28 07:45:13 -04:00 committed by GitHub
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@ -729,7 +729,7 @@ Pinterest, for example, could have the following microservices: user profile, fo
### Service Discovery
Systems such as [Zookeeper](http://www.slideshare.net/sauravhaloi/introduction-to-apache-zookeeper) can help services find each other by keeping track of registered names, addresses, ports, etc.
Systems such as [Consul](https://www.consul.io/docs/index.html), [Etcd](https://coreos.com/etcd/docs/latest), and [Zookeeper](http://www.slideshare.net/sauravhaloi/introduction-to-apache-zookeeper) can help services find each other by keeping track of registered names, addresses, and ports. [Health checks](https://www.consul.io/intro/getting-started/checks.html) help verify service integrity and are often done using an [HTTP](#hypertext-transfer-protocol-http) endpoint. Both Consul and Etcd have a built in [key-value store](#key-value-store) that can be useful for storing config values and other shared data.
### Disadvantage(s): application layer