NVMe devices
NVMe devices
Plugin: go.d.plugin Module: nvme
Overview
This collector monitors the health of NVMe devices. It relies on the nvme 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 supports collecting metrics from multiple instances of this integration, including remote instances.
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
Install nvme-cli
See Distro Support. Install nvme-cli using your distribution’s package manager.
For Netdata running in a Docker container: grant NVMe device access
Your NVMe devices need to be accessible within the Docker container for Netdata to monitor them.
Include the following option in your docker run command or add the device mapping in your docker-compose.yml file:
-
docker run--device '/dev/nvme0n1:/dev/nvme0n1' -
docker-compose.ymlservices: netdata: devices: - "/dev/nvme0n1:/dev/nvme0n1"
Note: Replace /dev/nvme0n1 with your actual NVMe device name.
Configuration
File
The configuration file name for this integration is go.d/nvme.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/nvme.conf
Options
The following options can be defined globally: update_every, autodetection_retry.
| Name | Description | Default | Required |
|---|---|---|---|
| update_every | Data collection frequency. | 10 | no |
| autodetection_retry | Recheck interval in seconds. Zero means no recheck will be scheduled. | 0 | no |
| timeout | nvme binary execution timeout. | 2 | no |
Examples
Custom update_every
Allows you to override the default data collection interval.
jobs:
- name: nvme
update_every: 5 # Collect NVMe metrics 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 device
These metrics refer to the NVME device.
Labels:
| Label | Description |
|---|---|
| device | NVMe device name |
Metrics:
| Metric | Dimensions | Unit |
|---|---|---|
| nvme.device_estimated_endurance_perc | used | % |
| nvme.device_available_spare_perc | spare | % |
| nvme.device_composite_temperature | temperature | celsius |
| nvme.device_io_transferred_count | read, written | bytes |
| nvme.device_power_cycles_count | power | cycles |
| nvme.device_power_on_time | power-on | seconds |
| nvme.device_critical_warnings_state | available_spare, temp_threshold, nvm_subsystem_reliability, read_only, volatile_mem_backup_failed, persistent_memory_read_only | state |
| nvme.device_unsafe_shutdowns_count | unsafe | shutdowns |
| nvme.device_media_errors_rate | media | errors/s |
| nvme.device_error_log_entries_rate | error_log | entries/s |
| nvme.device_warning_composite_temperature_time | wctemp | seconds |
| nvme.device_critical_composite_temperature_time | cctemp | seconds |
| nvme.device_thermal_mgmt_temp1_transitions_rate | temp1 | transitions/s |
| nvme.device_thermal_mgmt_temp2_transitions_rate | temp2 | transitions/s |
| nvme.device_thermal_mgmt_temp1_time | temp1 | seconds |
| nvme.device_thermal_mgmt_temp2_time | temp2 | seconds |
Alerts
The following alerts are available:
| Alert name | On metric | Description |
|---|---|---|
| nvme_device_critical_warnings_state | nvme.device_critical_warnings_state | NVMe device ${label:device} has critical warnings |
Troubleshooting
Debug Mode
To troubleshoot issues with the nvme collector, run the go.d.plugin with the debug option enabled. The output
should give you clues as to why the collector isn’t working.
-
Navigate to the
plugins.ddirectory, usually at/usr/libexec/netdata/plugins.d/. If that’s not the case on your system, opennetdata.confand look for thepluginssetting under[directories].cd /usr/libexec/netdata/plugins.d/ -
Switch to the
netdatauser.sudo -u netdata -s -
Run the
go.d.pluginto debug the collector:./go.d.plugin -d -m nvme
Getting Logs
If you’re encountering problems with the nvme collector, follow these steps to retrieve logs and identify potential issues:
- Run the command specific to your system (systemd, non-systemd, or Docker container).
- Examine the output for any warnings or error messages that might indicate issues. These messages should provide clues about the root cause of the problem.
System with systemd
Use the following command to view logs generated since the last Netdata service restart:
journalctl _SYSTEMD_INVOCATION_ID="$(systemctl show --value --property=InvocationID netdata)" --namespace=netdata --grep nvme
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 nvme /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 nvme