Configuration file reference of nfd-master
Table of contents
- noPublish
- extraLabelNs
- denyLabelNs
- autoDefaultNs
- resourceLabels
- enableTaints
- labelWhiteList
- resyncPeriod
- leaderElection
- nfdApiParallelism
- klog
See the sample configuration file for a full example configuration.
noPublish
noPublish option disables updates to the Node objects in the Kubernetes API server, making a "dry-run" flag for nfd-master. No Labels, Annotations, Taints or ExtendedResources of nodes are updated.
Default: false
Example:
noPublish: true
extraLabelNs
extraLabelNs specifies a list of allowed feature label namespaces. This option can be used to allow other vendor or application specific namespaces for custom labels from the local and custom feature sources, even though these labels were denied using the denyLabelNs parameter.
The same namespace control and this option applies to Extended Resources (created with resourceLabels), too.
Default: empty
Example:
extraLabelNs: ["added.ns.io","added.kubernets.io"]
denyLabelNs
denyLabelNs specifies a list of excluded label namespaces. By default, nfd-master allows creating labels in all namespaces, excluding kubernetes.io namespace and its sub-namespaces (i.e. *.kubernetes.io). However, you should note that kubernetes.io and its sub-namespaces are always denied. This option can be used to exclude some vendors or application specific namespaces.
Default: empty
Example:
denyLabelNs: ["denied.ns.io","denied.kubernetes.io"]
autoDefaultNs
The autoDefaultNs option controls the automatic prefixing of names. When set to true (the default in NFD version master) nfd-master automatically adds the default feature.node.kubernetes.io/ prefix to unprefixed labels, annotations and extended resources - this is also the default behavior in NFD v0.15 and earlier. When the option is set to false, no prefix will be prepended to unprefixed names, effectively causing them to be filtered out (as NFD does not allow unprefixed names of labels, annotations or extended resources). The default will be changed to false in a future release.
For example, with the autoDefaultNs set to true, a NodeFeatureRule with
labels:
foo: bar
Will turn into feature.node.kubernetes.io/foo=bar node label. With autoDefaultNs set to false, no prefix is added and the label will be filtered out.
Note that taint keys are not affected by this option.
Default: true
Example:
autoDefaultNs: false
resourceLabels
DEPRECATED: NodeFeatureRule should be used for managing extended resources in NFD.
The resourceLabels option specifies a list of features to be advertised as extended resources instead of labels. Features that have integer values can be published as Extended Resources by listing them in this option.
Default: empty
Example:
resourceLabels: ["vendor-1.com/feature-1","vendor-2.io/feature-2"]
enableTaints
enableTaints enables/disables node tainting feature of NFD.
Default: false
Example:
enableTaints: true
labelWhiteList
labelWhiteList specifies a regular expression for filtering feature labels based on their name. Each label must match against the given regular expression or it will not be 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 namespace is omitted.
Default: empty
Example:
labelWhiteList: "foo"
resyncPeriod
The resyncPeriod option specifies the NFD API controller resync period. The resync means nfd-master replaying all NodeFeature and NodeFeatureRule objects, thus effectively re-syncing all nodes in the cluster (i.e. ensuring labels, annotations, extended resources and taints are in place).
Does not have effect if the NodeFeatureAPI feature gate is disabled.
Default: 1 hour.
Example:
resyncPeriod: 2h
leaderElection
The leaderElection section exposes configuration to tweak leader election.
leaderElection.leaseDuration
leaderElection.leaseDuration is the duration that non-leader candidates will wait to force acquire leadership. This is measured against time of last observed ack.
A client needs to wait a full LeaseDuration without observing a change to the record before it can attempt to take over. When all clients are shutdown and a new set of clients are started with different names against the same leader record, they must wait the full LeaseDuration before attempting to acquire the lease. Thus LeaseDuration should be as short as possible (within your tolerance for clock skew rate) to avoid a possible long waits in the scenario.
Default: 15 seconds.
Example:
leaderElection:
leaseDurtation: 15s
leaderElection.renewDeadline
leaderElection.renewDeadline is the duration that the acting master will retry refreshing leadership before giving up.
This value has to be lower than leaseDuration and greater than retryPeriod*1.2.
Default: 10 seconds.
Example:
leaderElection:
renewDeadline: 10s
leaderElection.retryPeriod
leaderElection.retryPeriod is the duration the LeaderElector clients should wait between tries of actions.
It has to be greater than 0.
Default: 2 seconds.
Example:
leaderElection:
retryPeriod: 2s
nfdApiParallelism
The nfdApiParallelism option can be used to specify the maximum number of concurrent node updates.
Does not have effect if the NodeFeatureAPI feature gate is disabled.
Default: 10
Example:
nfdApiParallelism: 1
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.
klog.addDirHeader
If true, adds the file directory to the header of the log messages.
Default: false
Run-time configurable: yes
klog.alsologtostderr
Log to standard error as well as files.
Default: false
Run-time configurable: yes
klog.logBacktraceAt
When logging hits line file:N, emit a stack trace.
Default: empty
Run-time configurable: yes
klog.logDir
If non-empty, write log files in this directory.
Default: empty
Run-time configurable: no
klog.logFile
If non-empty, use this log file.
Default: empty
Run-time configurable: no
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
klog.logtostderr
Log to standard error instead of files
Default: true
Run-time configurable: yes
klog.skipHeaders
If true, avoid header prefixes in the log messages.
Default: false
Run-time configurable: yes
klog.skipLogHeaders
If true, avoid headers when opening log files.
Default: false
Run-time configurable: no
klog.stderrthreshold
Logs at or above this threshold go to stderr (default 2)
Run-time configurable: yes
klog.v
Number for the log level verbosity.
Default: 0
Run-time configurable: yes
klog.vmodule
Comma-separated list of pattern=N settings for file-filtered logging.
Default: empty
Run-time configurable: yes