This article will help you get the mdadm plugin for sd-agent configured and returning metrics
Installing the mdadm plugin package
Install the mdadm plugin on Debian/Ubuntu:
sudo apt-get install sd-agent-mdadm
Install the mdadm plugin on RHEL/CentOS:
sudo yum install sd-agent-mdadm
Read more about agent plugins.
Configuring the agent to collect mdadm metrics
1. Configure /etc/sd-agent/conf.d/mdadm.yaml
# This check takes no initial configuration
init_config:
instances:
[{}]
2. Restart the agent
sudo /etc/init.d/sd-agent restart
or
sudo systemctl restart sd-agent
Verifying the configuration
Execute info to verify the configuration with the following:
sudo /etc/init.d/sd-agent info
or
/usr/share/python/sd-agent/agent.py info
If the agent has been configured correctly you'll see an output such as:
mdadm ----- - instance #0 [OK] - Collected * metrics
You can also view the metrics returned with the following command:
sudo -u sd-agent /usr/share/python/sd-agent/agent.py check mdadm
Configuring graphs
Click the name of your server from the Devices list in your Server Density account then go to the Metrics tab. Click the + Graph button on the right then choose the http metrics to display the graphs. The metrics will also be available to select when building dashboard graphs.
Monitored metrics
| Metric | Values |
|---|---|
| system.mdadm.blocks |
|
| system.mdadm.degraded | |
| system.mdadm.non_degraded_disk | |
| system.mdadm.raid_disks | |
| system.mdadm.read_only | |
| system.mdadm.active | |
| system.mdadm.disk.faulty | |
| system.mdadm.disk.number | |
| system.mdadm.disk.replacement | |
| system.mdadm.disk.spare | |
| system.mdadm.disk.write_mostly |
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