Commandline flags of nfd-master
Table of contents
- -h, -help
- -version
- -feature-gates
- -prune
- -port
- -metrics
- -instance
- -ca-file
- -cert-file
- -key-file
- -verify-node-name
- -enable-leader-election
- -enable-taints
- -no-publish
- -crd-controller
- -featurerules-controller
- -label-whitelist
- -extra-label-ns
- -deny-label-ns
- -resource-labels
- -config
- -options
- -nfd-api-parallelism
- Logging
- -resync-period
To quickly view available command line flags execute nfd-master -help. In a docker container:
docker run gcr.io/k8s-staging-nfd/node-feature-discovery:master nfd-master -help
-h, -help
Print usage and exit.
-version
Print version and exit.
-feature-gates
The -feature-gates flag is used to enable or disable non GA features. The list of available feature gates can be found in the feature gates documentation.
Example:
nfd-master -feature-gates NodeFeatureAPI=false
-prune
The -prune flag is a sub-command like option for cleaning up the cluster. It causes nfd-master to remove all NFD related labels, annotations and extended resources from all Node objects of the cluster and exit.
-port
The -port flag specifies the TCP port that nfd-master listens for incoming requests.
Default: 8080
Example:
nfd-master -port=443
-metrics
The -metrics flag specifies the port on which to expose Prometheus metrics. Setting this to 0 disables the metrics server on nfd-master.
Default: 8081
Example:
nfd-master -metrics=12345
-instance
The -instance flag makes it possible to run multiple NFD deployments in parallel. In practice, it separates the node annotations between deployments so that each of them can store metadata independently. The instance name must start and end with an alphanumeric character and may only contain alphanumeric characters, -, _ or ..
Default: empty
Example:
nfd-master -instance=network
-ca-file
NOTE the gRPC API is deprecated and will be removed in a future release. and this flag will be removed as well.
The -ca-file is one of the three flags (together with -cert-file and -key-file) controlling master-worker mutual TLS authentication on the nfd-master side. This flag specifies the TLS root certificate that is used for authenticating incoming connections. NFD-Worker side needs to have matching key and cert files configured for the incoming requests to be accepted.
Default: empty
NOTE: Must be specified together with
-cert-fileand-key-file
Example:
nfd-master -ca-file=/opt/nfd/ca.crt -cert-file=/opt/nfd/master.crt -key-file=/opt/nfd/master.key
-cert-file
NOTE the gRPC API is deprecated and will be removed in a future release. and this flag will be removed as well.
The -cert-file is one of the three flags (together with -ca-file and -key-file) controlling master-worker mutual TLS authentication on the nfd-master side. This flag specifies the TLS certificate presented for authenticating outgoing traffic towards nfd-worker.
Default: empty
NOTE: Must be specified together with
-ca-fileand-key-file
Example:
nfd-master -cert-file=/opt/nfd/master.crt -key-file=/opt/nfd/master.key -ca-file=/opt/nfd/ca.crt
-key-file
NOTE the gRPC API is deprecated and will be removed in a future release. and this flag will be removed as well.
The -key-file is one of the three flags (together with -ca-file and -cert-file) controlling master-worker mutual TLS authentication on the nfd-master side. This flag specifies the private key corresponding the given certificate file (-cert-file) that is used for authenticating outgoing traffic.
Default: empty
NOTE: Must be specified together with
-cert-fileand-ca-file
Example:
nfd-master -key-file=/opt/nfd/master.key -cert-file=/opt/nfd/master.crt -ca-file=/opt/nfd/ca.crt
-verify-node-name
NOTE the gRPC API is deprecated and will be removed in a future release. and this flag will be removed as well.
The -verify-node-name flag controls the NodeName based authorization of incoming requests and only has effect when mTLS authentication has been enabled (with -ca-file, -cert-file and -key-file). If enabled, the worker node name of the incoming must match with the CN or a SAN in its TLS certificate. Thus, workers are only able to label the node they are running on (or the node whose certificate they present).
Node Name based authorization is disabled by default.
Default: false
Example:
nfd-master -verify-node-name -ca-file=/opt/nfd/ca.crt \
-cert-file=/opt/nfd/master.crt -key-file=/opt/nfd/master.key
-enable-leader-election
The -enable-leader-election flag enables leader election for NFD-Master. It is advised to turn on this flag when running more than one instance of NFD-Master.
Does not have effect if the NodeFeatureAPI feature gate is disabled.
Default: false
nfd-master -enable-leader-election
-enable-taints
The -enable-taints flag enables/disables node tainting feature of NFD.
Default: false
Example:
nfd-master -enable-taints=true
-no-publish
The -no-publish flag disables updates to the Node objects in the Kubernetes API server, making a "dry-run" flag for nfd-master. No Labels, Annotations or ExtendedResources of nodes are updated.
Default: false
Example:
nfd-master -no-publish
-crd-controller
NOTE This flag will be removed in a future release at the same time with the deprecated gRPC API.
The -crd-controller flag specifies whether the NFD CRD API controller is enabled or not. The controller is responsible for processing NodeFeature and NodeFeatureRule objects.
Default: true
Example:
nfd-master -crd-controller=false
-featurerules-controller
DEPRECATED: use -crd-controller instead.
-label-whitelist
The -label-whitelist 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:
nfd-master -label-whitelist='.*cpuid\.'
-extra-label-ns
The -extra-label-ns flag specifies a comma-separated 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 deny-label-ns flag.
The same namespace control and this flag applies Extended Resources (created with -resource-labels), too.
Default: empty
Example:
nfd-master -extra-label-ns=vendor-1.com,vendor-2.io
-deny-label-ns
The -deny-label-ns flag specifies a comma-separated 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. For example, nfd-master -deny-label-ns="" would still disallow kubernetes.io and *.kubernetes.io. This option can be used to exclude some vendors or application specific namespaces. Note that the namespaces feature.node.kubernetes.io and profile.node.kubernetes.io and their sub-namespaces are always allowed and cannot be denied.
Default: empty
Example:
nfd-master -deny-label-ns=*.vendor.com,vendor-2.io
-resource-labels
DEPRECATED: NodeFeatureRule should be used for managing extended resources in NFD.
The -resource-labels flag specifies a comma-separated 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 flag.
Default: empty
Example:
nfd-master -resource-labels=vendor-1.com/feature-1,vendor-2.io/feature-2
-config
The -config flag specifies the path of the nfd-master configuration file to use.
Default: /etc/kubernetes/node-feature-discovery/nfd-master.conf
Example:
nfd-master -config=/opt/nfd/master.conf
-options
The -options flag may be used to specify and override configuration file options directly from the command line. The required format is the same as in the config file i.e. JSON or YAML. Configuration options specified via this flag will override those from the configuration file:
Default: empty
Example:
nfd-master -options='{"noPublish": true}'
-nfd-api-parallelism
The -nfd-api-parallelism flag 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:
nfd-master -nfd-api-parallelism=1
Logging
The following logging-related flags are inherited from the klog package.
-add_dir_header
If true, adds the file directory to the header of the log messages.
Default: false
-alsologtostderr
Log to standard error as well as files.
Default: false
-log_backtrace_at
When logging hits line file:N, emit a stack trace.
Default: empty
-log_dir
If non-empty, write log files in this directory.
Default: empty
-log_file
If non-empty, use this log file.
Default: empty
-log_file_max_size
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
-logtostderr
Log to standard error instead of files
Default: true
-skip_headers
If true, avoid header prefixes in the log messages.
Default: false
-skip_log_headers
If true, avoid headers when opening log files.
Default: false
-stderrthreshold
Logs at or above this threshold go to stderr.
Default: 2
-v
Number for the log level verbosity.
Default: 0
-vmodule
Comma-separated list of pattern=N settings for file-filtered logging.
Default: empty
-resync-period
The -resync-period flag 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:
nfd-master -resync-period=2h