Configuration file reference of nfd-worker
Table of contents
See the sample configuration file for a full example configuration.
core
The core section contains common configuration settings that are not specific to any particular feature source.
core.sleepInterval
core.sleepInterval specifies the interval between consecutive passes of feature (re-)detection, and thus also the interval between node re-labeling. A non-positive value implies infinite sleep interval, i.e. no re-detection or re-labeling is done.
Note: Overridden by the deprecated -sleep-interval command line flag (if specified).
Default: 60s
Example:
core:
sleepInterval: 60s
core.featureSources
core.featureSources specifies the list of enabled feature sources. A special value all enables all sources. Prefixing a source name with - indicates that the source will be disabled instead - this is only meaningful when used in conjunction with all. This option allows completely disabling the feature detection so that neither standard feature labels are generated nor the raw feature data is available for custom rule processing.
Default: [all]
Example:
core:
# Enable all but cpu and local sources
featureSources:
- "all"
- "-cpu"
- "-local"
core:
# Enable only cpu and local sources
featureSources:
- "cpu"
- "local"
core.labelSources
core.labelSources specifies the list of enabled label sources. A special value all enables all sources. Prefixing a source name with - indicates that the source will be disabled instead - this is only meaningful when used in conjunction with all. This configuration option affects the generation of node labels but not the actual discovery of the underlying feature data that is used e.g. in custom/NodeFeatureRule rules.
Note: Overridden by the -label-sources and -sources command line flags and the core.sources configurations option (if any of them is specified).
Default: [all]
Example:
core:
# Enable all but cpu and system sources
labelSources:
- "all"
- "-cpu"
- "-system"
core:
# Enable only cpu and system sources
labelSources:
- "cpu"
- "system"
core.sources
DEPRECATED: use core.labelSources instead.
Note: core.sources takes precedence over the core.labelSources configuration file option.
core.labelWhiteList
core.labelWhiteList specifies a regular expression for filtering feature labels based on the label name. Non-matching labels are not published.
Note: The regular expression is only matches against the "basename" part of the label, i.e. to the part of the name after ‘/'. The label prefix (or namespace) is omitted.
Note: Overridden by the deprecated -label-whitelist command line flag (if specified).
Default: null
Example:
core:
labelWhiteList: '^cpu-cpuid'
core.noPublish
Setting core.noPublish to true disables all communication with the nfd-master. It is effectively a "dry-run" flag: nfd-worker runs feature detection normally, but no labeling requests are sent to nfd-master.
Note: Overridden by the -no-publish command line flag (if specified).
Default: false
Example:
core:
noPublish: true
core.klog
The following options specify the logger configuration. Most of which can be dynamically adjusted at run-time.
Note: The logger options can also be specified via command line flags which take precedence over any corresponding config file options.
core.klog.addDirHeader
If true, adds the file directory to the header of the log messages.
Default: false
Run-time configurable: yes
core.klog.alsologtostderr
Log to standard error as well as files.
Default: false
Run-time configurable: yes
core.klog.logBacktraceAt
When logging hits line file:N, emit a stack trace.
Default: empty
Run-time configurable: yes
core.klog.logDir
If non-empty, write log files in this directory.
Default: empty
Run-time configurable: no
core.klog.logFile
If non-empty, use this log file.
Default: empty
Run-time configurable: no
core.klog.logFileMaxSize
Defines the maximum size a log file can grow to. Unit is megabytes. If the value is 0, the maximum file size is unlimited.
Default: 1800
Run-time configurable: no
core.klog.logtostderr
Log to standard error instead of files
Default: true
Run-time configurable: yes
core.klog.skipHeaders
If true, avoid header prefixes in the log messages.
Default: false
Run-time configurable: yes
core.klog.skipLogHeaders
If true, avoid headers when opening log files.
Default: false
Run-time configurable: no
core.klog.stderrthreshold
Logs at or above this threshold go to stderr (default 2)
Run-time configurable: yes
core.klog.v
Number for the log level verbosity.
Default: 0
Run-time configurable: yes
core.klog.vmodule
Comma-separated list of pattern=N settings for file-filtered logging.
Default: empty
Run-time configurable: yes
sources
The sources section contains feature source specific configuration parameters.
sources.cpu
sources.cpu.cpuid
sources.cpu.cpuid.attributeBlacklist
Prevent publishing cpuid features listed in this option.
Note: overridden by sources.cpu.cpuid.attributeWhitelist (if specified)
Default: [BMI1, BMI2, CLMUL, CMOV, CX16, ERMS, F16C, HTT, LZCNT, MMX, MMXEXT, NX, POPCNT, RDRAND, RDSEED, RDTSCP, SGX, SGXLC, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSSE3]
Example:
sources:
cpu:
cpuid:
attributeBlacklist: [MMX, MMXEXT]
sources.cpu.cpuid.attributeWhitelist
Only publish the cpuid features listed in this option.
Note: takes precedence over sources.cpu.cpuid.attributeBlacklist
Default: empty
Example:
sources:
cpu:
cpuid:
attributeWhitelist: [AVX512BW, AVX512CD, AVX512DQ, AVX512F, AVX512VL]
sources.kernel
sources.kernel.kconfigFile
Path of the kernel config file. If empty, NFD runs a search in the well-known standard locations.
Default: empty
Example:
sources:
kernel:
kconfigFile: "/path/to/kconfig"
sources.kernel.configOpts
Kernel configuration options to publish as feature labels.
Default: [NO_HZ, NO_HZ_IDLE, NO_HZ_FULL, PREEMPT]
Example:
sources:
kernel:
configOpts: [NO_HZ, X86, DMI]
soures.pci
soures.pci.deviceClassWhitelist
List of PCI device class IDs for which to publish a label. Can be specified as a main class only (e.g. 03) or full class-subclass combination (e.g. 0300) - the former implies that all subclasses are accepted. The format of the labels can be further configured with deviceLabelFields.
Default: ["03", "0b40", "12"]
Example:
sources:
pci:
deviceClassWhitelist: ["0200", "03"]
soures.pci.deviceLabelFields
The set of PCI ID fields to use when constructing the name of the feature label. Valid fields are class, vendor, device, subsystem_vendor and subsystem_device.
Default: [class, vendor]
Example:
sources:
pci:
deviceLabelFields: [class, vendor, device]
With the example config above NFD would publish labels like: feature.node.kubernetes.io/pci-<class-id>_<vendor-id>_<device-id>.present=true
sources.usb
soures.usb.deviceClassWhitelist
List of USB device class IDs for which to publish a feature label. The format of the labels can be further configured with deviceLabelFields.
Default: ["0e", "ef", "fe", "ff"]
Example:
sources:
usb:
deviceClassWhitelist: ["ef", "ff"]
soures.usb.deviceLabelFields
The set of USB ID fields from which to compose the name of the feature label. Valid fields are class, vendor, device and serial.
Default: [class, vendor, device]
Example:
sources:
pci:
deviceLabelFields: [class, vendor]
With the example config above NFD would publish labels like: feature.node.kubernetes.io/usb-<class-id>_<vendor-id>.present=true
sources.custom
List of rules to process in the custom feature source to create user-specific labels. Refer to the documentation of the custom feature source for details of the available rules and their configuration.
Default: empty
Example:
sources:
custom:
- name: "my custom rule"
labels:
my-custom-feature: "true"
matchFeatures:
- feature: kernel.loadedmodule
matchExpressions:
e1000e: {op: Exists}
- feature: pci.device
matchExpressions:
class: {op: In, value: ["0200"]}
vendor: {op: In, value: ["8086"]}