Improve README; check-masterha
Monitor MasterHA status.
+## Synopsis
+```
+check-masterha status --all
+```
+
+## Installation
+
+First, build this program.
+
+```
+go get github.com/mackerelio/go-check-plugins
+cd $(go env GOPATH)/src/github.com/mackerelio/go-check-plugins/check-masterha
+go install
+```
+
+Or you can use this program by installing the official Mackerel package. See [Using the official check plugin pack for check monitoring - Mackerel Docs](https://mackerel.io/docs/entry/howto/mackerel-check-plugins).
+
+
+Next, you can execute this program :-)
+
+```
+check-masterha status --all
+check-masterha repl --conf /path/to/masterha_cluster.cnf
+check-masterha ssh --conf /path/to/masterha_cluster.cnf
+```
+
+
+## Setting for mackerel-agent
+
+If there are no problems in the execution result, add s setting in mackerel-agent.conf .
+
+```
+[plugin.checks.check-masterha-sample]
+command = ["check-masterha", "status", "--all"]
+```
+
## Usage
+### Subcommands
```
-$ check-masterha --conf /path/to/masterha
+ repl check to masterha_check_repl
+ ssh check to masterha_check_ssh
+ status check to masterha_check_status
+```
+
+### Options
+#### `repl` subcommand
+```
+ -c, --conf= target config file
+ --confdir= config directory (default: /usr/local/masterha/conf)
+ -a, --all use all config file for target
+ --seconds_behind_master= seconds_behind_master option for masterha_check_repl
```
-## Setting
+#### `ssh` subcommand
```
-[plugin.checks.masterha-status]
-command = "/path/to/check-masterha status --all"
+ -c, --conf= target config file
+ --confdir= config directory (default: /usr/local/masterha/conf)
+ -a, --all use all config file for target
+```
-[plugin.checks.masterha-repl]
-command = "/path/to/check-masterha repl --conf /path/to/masterha_cluster.cnf"
+#### `status` subcommand
-[plugin.checks.masterha-ssh]
-command = "/path/to/check-masterha ssh --conf /path/to/masterha_cluster.cnf"
```
+ -c, --conf= target config file
+ --confdir= config directory (default: /usr/local/masterha/conf)
+ -a, --all use all config file for target
+```
+
+## For more information
-## Other
+Please execute `check-masterha -h` and you can get command line options.
-* [Master HA Manager](https://code.google.com/p/mysql-master-ha/)
+## References
+- [Master HA Manager](https://code.google.com/p/mysql-master-ha/)
