LVM logical volumes
LVM logical volumes
Plugin: go.d.plugin Module: lvm
Overview
This collector monitors the health of LVM logical volumes. It relies on the lvs CLI tool but avoids directly executing the binary. Instead, it utilizes ndsudo, a Netdata helper specifically designed to run privileged commands securely within the Netdata environment. This approach eliminates the need to use sudo, improving security and potentially simplifying permission management.
This collector is supported on all platforms.
This collector only supports collecting metrics from a single instance of this integration.
Default Behavior
Auto-Detection
This integration doesn’t support auto-detection.
Limits
The default configuration for this integration does not impose any limits on data collection.
Performance Impact
The default configuration for this integration is not expected to impose a significant performance impact on the system.
Setup
Prerequisites
No action required.
Configuration
File
The configuration file name for this integration is go.d/lvm.conf.
You can edit the configuration file using the edit-config script from the
Netdata config directory.
cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata
sudo ./edit-config go.d/lvm.conf
Options
The following options can be defined globally: update_every.
| Name | Description | Default | Required |
|---|---|---|---|
| update_every | Data collection frequency. | 10 | no |
| timeout | lvs binary execution timeout. | 2 | no |
Examples
Custom update_every
Allows you to override the default data collection interval.
jobs:
- name: lvm
update_every: 5 # Collect logical volume statistics every 5 seconds
Metrics
Metrics grouped by scope.
The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.
Per logical volume
These metrics refer to the LVM logical volume.
Labels:
| Label | Description |
|---|---|
| lv_name | Logical volume name |
| vg_name | Volume group name |
| volume_type | Type of the volume |
Metrics:
| Metric | Dimensions | Unit |
|---|---|---|
| lvm.lv_data_space_utilization | utilization | % |
| lvm.lv_metadata_space_utilization | utilization | % |
Alerts
The following alerts are available:
| Alert name | On metric | Description |
|---|---|---|
| lvm_lv_data_space_utilization | lvm.lv_data_space_utilization | LVM logical volume high data space usage (LV ${label:lv_name} VG ${label:vg_name} Type ${label:volume_type}) |
| lvm_lv_metadata_space_utilization | lvm.lv_metadata_space_utilization | LVM logical volume high metadata space usage (LV ${label:lv_name} VG ${label:vg_name} Type ${label:volume_type}) |
Troubleshooting
Debug Mode
Important: Debug mode is not supported for data collection jobs created via the UI using the Dyncfg feature.
To troubleshoot issues with the lvm collector, run the go.d.plugin with the debug option enabled. The output
should give you clues as to why the collector isn’t working.
-
Navigate to the
plugins.ddirectory, usually at/usr/libexec/netdata/plugins.d/. If that’s not the case on your system, opennetdata.confand look for thepluginssetting under[directories].cd /usr/libexec/netdata/plugins.d/ -
Switch to the
netdatauser.sudo -u netdata -s -
Run the
go.d.pluginto debug the collector:./go.d.plugin -d -m lvm
Getting Logs
If you’re encountering problems with the lvm collector, follow these steps to retrieve logs and identify potential issues:
- Run the command specific to your system (systemd, non-systemd, or Docker container).
- Examine the output for any warnings or error messages that might indicate issues. These messages should provide clues about the root cause of the problem.
System with systemd
Use the following command to view logs generated since the last Netdata service restart:
journalctl _SYSTEMD_INVOCATION_ID="$(systemctl show --value --property=InvocationID netdata)" --namespace=netdata --grep lvm
System without systemd
Locate the collector log file, typically at /var/log/netdata/collector.log, and use grep to filter for collector’s name:
grep lvm /var/log/netdata/collector.log
Note: This method shows logs from all restarts. Focus on the latest entries for troubleshooting current issues.
Docker Container
If your Netdata runs in a Docker container named “netdata” (replace if different), use this command:
docker logs netdata 2>&1 | grep lvm