原文地址: https://www.elastic.co/guide/en/elasticsearch/reference/7.7/cat-master.html, 原文档版权归 www.elastic.co 所有
IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
cat master APIedit
Returns information about the master node, including the ID, bound IP address, and name.
Requestedit
GET /_cat/master
Query parametersedit
-
format - (Optional, string) Short version of the HTTP accept header. Valid values include JSON, YAML, etc.
-
h - (Optional, string) Comma-separated list of column names to display.
-
help -
(Optional, boolean) If
true, the response includes help information. Defaults tofalse. -
local -
(Optional, boolean) If
true, the request retrieves information from the local node only. Defaults tofalse, which means information is retrieved from the master node. -
master_timeout -
(Optional, time units) Specifies the period of time to wait for
a connection to the master node. If no response is received before the timeout
expires, the request fails and returns an error. Defaults to
30s. -
s - (Optional, string) Comma-separated list of column names or column aliases used to sort the response.
-
v -
(Optional, boolean) If
true, the response includes column headings. Defaults tofalse.
Examplesedit
GET /_cat/master?v
The API returns the following response:
id host ip node YzWoH_2BT-6UjVGDyPdqYg 127.0.0.1 127.0.0.1 YzWoH_2
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:
% 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