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README: Add explanation about official vs legacy ports
Add a note about 2379/2380 vs 4001/7001. I believe this is as far as we can go just yet, because we have not fully deprecated the old ports, and still want to configure them in some instances. Related #3480.
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@@ -62,6 +62,12 @@ curl -L http://127.0.0.1:2379/v2/keys/mykey
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You have successfully started an etcd and written a key to the store.
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### etcd TCP ports
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The [official etcd ports][iana-ports] are 2379 for client requests, and 2380 for peer communication. To maintain compatibility, some etcd configuration and documentation continues to refer to the legacy ports 4001 and 7001, but all new etcd use and discussion should adopt the IANA-assigned ports. The legacy ports 4001 and 7001 will be fully deprecated, and support for their use removed, in future etcd releases.
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[iana-ports]: https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=etcd
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### Running local etcd cluster
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First install [goreman](https://github.com/mattn/goreman), which manages Procfile-based applications.
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