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Multiple Datacenter Documentation 

Updated the slightly confusing documentation on how to join the clusters over WAN. Also the inputs from #1656 is taken in account in this documentation update.
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sdinakar85 2016-10-07 14:12:37 +05:30 committed by GitHub
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website/source/docs/guides/datacenters.html.markdown
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@ -33,7 +33,7 @@ only contain server nodes. Client nodes send requests to a datacenter-local serv
so they do not participate in WAN gossip. Client requests are forwarded by local so they do not participate in WAN gossip. Client requests are forwarded by local
servers to a server in the target datacenter as necessary. servers to a server in the target datacenter as necessary.
The next step is to ensure that all the server nodes join the WAN gossip pool: The next step is to ensure that all the server nodes join the WAN gossip pool (include all the servers in all the datacenters):
```text ```text
$ consul join -wan <server 1> <server 2> ... $ consul join -wan <server 1> <server 2> ...
@ -65,6 +65,16 @@ $ curl http://localhost:8500/v1/catalog/nodes?dc=dc1
$ curl http://localhost:8500/v1/catalog/nodes?dc=dc2 $ curl http://localhost:8500/v1/catalog/nodes?dc=dc2
... ...
``` ```
In order to persist the `join` information, the following can be added to the `consul` configuration in each of the `server` nodes in the cluster. For example, in `dc1` server nodes:
```
...
"retry_join_wan":[
"dc2-server-1",
...
"dc2-server-N",
],
...
```
There are a few networking requirements that must be satisfied for this to There are a few networking requirements that must be satisfied for this to
work. Of course, all server nodes must be able to talk to each other. Otherwise, work. Of course, all server nodes must be able to talk to each other. Otherwise,