[[cat-master]]
== cat master

`master` doesn't have any extra options. It simply displays the
master's node ID, bound IP address, and node name. For example:

[source,js]
--------------------------------------------------
GET /_cat/master?v
--------------------------------------------------
// CONSOLE

might respond:

[source,txt]
--------------------------------------------------
id                     host      ip        node
YzWoH_2BT-6UjVGDyPdqYg 127.0.0.1 127.0.0.1 YzWoH_2
--------------------------------------------------
// TESTRESPONSE[s/YzWoH_2.+/.+/ non_json]

This information is also available via the `nodes` command, but this
is slightly shorter when all you want to do, for example, is verify
all nodes agree on the master:

[source,sh]
--------------------------------------------------
% pssh -i -h list.of.cluster.hosts curl -s localhost:9200/_cat/master
[1] 19:16:37 [SUCCESS] es3.vm
Ntgn2DcuTjGuXlhKDUD4vA 192.168.56.30 H5dfFeA
[2] 19:16:37 [SUCCESS] es2.vm
Ntgn2DcuTjGuXlhKDUD4vA 192.168.56.30 H5dfFeA
[3] 19:16:37 [SUCCESS] es1.vm
Ntgn2DcuTjGuXlhKDUD4vA 192.168.56.30 H5dfFeA
--------------------------------------------------
// NOTCONSOLE