Monitoring Btrfs

Configure the Server Density agent to monitor your btrfs to:

• Collect important metrics about your file system
• Identify overall server slowdowns caused by the FS

Monitored metrics

  • Disk Usage
    • Usage
    • Used
    • Free
    • Total

Installing the BTRFS plugin package

Install the BTRFS plugin on Debian/Ubuntu:

sudo apt-get install sd-agent-btrfs

Install the BTRFS plugin on RHEL/CentOS:

sudo yum install sd-agent-btrfs

Read more about agent plugins.

Configuring the agent to monitor Btrfs

1. Configure /etc/sd-agent/conf.d/btrfs.yaml


- excluded_devices: [] # List of devices to exclude
  • Optional: if you wish to exclude devices, add them to excluded_devices

2. Restart the agent

sudo /etc/init.d/sd-agent restart

Verifying the configuration
Execute info to verify the configuration with the following:

sudo /etc/init.d/sd-agent info 

If the agent has been configured correctly you’ll see an output such as:

  - instance #0 [OK]
  - Collected 4 metrics & 0 events

You can also view the metrics returned with the following command:

sudo -u sd-agent /usr/share/python/sd-agent/ check btrfs

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 Btrfs metrics to display the graphs. The metrics will also be available to select when building dashboard graphs.

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