Improve README; check-elasticsearch
-check-elasticsearch
-==========
+# check-elasticsearch
+## Description
Check Elasticsearch Health with `/_cluster/health` API.
## Synopsis
-
-```shell
+```
check-elasticsearch [--scheme=<http|https>] [--host=<host>] [--port=<port>]
```
-## Setting
+## Installation
+
+First, build this program.
```
-[plugin.checks.elasticsearch]
-command = "/path/to/check-elasticsearch --host=127.0.0.1 --port=9200"
+go get github.com/mackerelio/go-check-plugins
+cd $(go env GOPATH)/src/github.com/mackerelio/go-check-plugins/check-elasticsearch
+go install
```
+
+Or you can use this program by installing the official Mackerel package. See [Using the official check plugin pack for check monitoring - Mackerel Docs](https://mackerel.io/docs/entry/howto/mackerel-check-plugins).
+
+
+Next, you can execute this program :-)
+
+```
+check-elasticsearch --host=127.0.0.1 --port=9200
+```
+
+
+## Setting for mackerel-agent
+
+If there are no problems in the execution result, add s setting in mackerel-agent.conf .
+
+```
+[plugin.checks.es-sample]
+command = ["check-elasticsearch", "--host", "127.0.0.1", "--port", "9200"]
+```
+
+## Usage
+### Options
+
+```
+ -s, --scheme= Elasticsearch scheme (default: http)
+ -H, --host= Elasticsearch host (default: localhost)
+ -p, --port= Elasticsearch port (default: 9200)
+```
+
+## For more information
+
+Please execute `check-elasticsearch -h` and you can get command line options.
