mirror of
https://github.com/kubernetes-sigs/node-feature-discovery.git
synced 2025-03-16 13:28:18 +00:00
b3cfe17392
This PR aims to optimize the process of updating nodes with corresponding features. In fact, previously, we were updating nodes sequentially even though they are independent from each other. Therefore, we integrated new components: LabelersNodePool which is responsible for spininng a goroutine whenever there's a request for updating nodes, and a Workqueue which is responsible for holding nodes names that should be updated. Signed-off-by: AhmedGrati <ahmedgrati1999@gmail.com>
424 lines
9.8 KiB
Markdown
424 lines
9.8 KiB
Markdown
---
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title: "Master cmdline reference"
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layout: default
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sort: 1
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---
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# Commandline flags of nfd-master
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{: .no_toc}
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## Table of contents
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{: .no_toc .text-delta}
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1. TOC
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{:toc}
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---
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To quickly view available command line flags execute `nfd-master -help`.
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In a docker container:
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```bash
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docker run {{ site.container_image }} nfd-master -help
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```
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### -h, -help
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Print usage and exit.
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### -version
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Print version and exit.
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### -prune
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The `-prune` flag is a sub-command like option for cleaning up the cluster. It
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causes nfd-master to remove all NFD related labels, annotations and extended
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resources from all Node objects of the cluster and exit.
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### -port
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The `-port` flag specifies the TCP port that nfd-master listens for incoming requests.
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Default: 8080
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Example:
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```bash
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nfd-master -port=443
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```
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### -instance
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The `-instance` flag makes it possible to run multiple NFD deployments in
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parallel. In practice, it separates the node annotations between deployments so
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that each of them can store metadata independently. The instance name must
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start and end with an alphanumeric character and may only contain alphanumeric
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characters, `-`, `_` or `.`.
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Default: *empty*
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Example:
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```bash
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nfd-master -instance=network
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```
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### -ca-file
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The `-ca-file` is one of the three flags (together with `-cert-file` and
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`-key-file`) controlling master-worker mutual TLS authentication on the
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nfd-master side. This flag specifies the TLS root certificate that is used for
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authenticating incoming connections. NFD-Worker side needs to have matching key
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and cert files configured in order for the incoming requests to be accepted.
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Default: *empty*
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Note: Must be specified together with `-cert-file` and `-key-file`
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Example:
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```bash
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nfd-master -ca-file=/opt/nfd/ca.crt -cert-file=/opt/nfd/master.crt -key-file=/opt/nfd/master.key
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```
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### -cert-file
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The `-cert-file` is one of the three flags (together with `-ca-file` and
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`-key-file`) controlling master-worker mutual TLS authentication on the
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nfd-master side. This flag specifies the TLS certificate presented for
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authenticating outgoing traffic towards nfd-worker.
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Default: *empty*
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Note: Must be specified together with `-ca-file` and `-key-file`
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Example:
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```bash
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nfd-master -cert-file=/opt/nfd/master.crt -key-file=/opt/nfd/master.key -ca-file=/opt/nfd/ca.crt
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```
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### -key-file
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The `-key-file` is one of the three flags (together with `-ca-file` and
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`-cert-file`) controlling master-worker mutual TLS authentication on the
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nfd-master side. This flag specifies the private key corresponding the given
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certificate file (`-cert-file`) that is used for authenticating outgoing
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traffic.
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Default: *empty*
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Note: Must be specified together with `-cert-file` and `-ca-file`
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Example:
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```bash
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nfd-master -key-file=/opt/nfd/master.key -cert-file=/opt/nfd/master.crt -ca-file=/opt/nfd/ca.crt
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```
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### -verify-node-name
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The `-verify-node-name` flag controls the NodeName based authorization of
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incoming requests and only has effect when mTLS authentication has been enabled
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(with `-ca-file`, `-cert-file` and `-key-file`). If enabled, the worker node
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name of the incoming must match with the CN or a SAN in its TLS certificate. Thus,
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workers are only able to label the node they are running on (or the node whose
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certificate they present).
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Node Name based authorization is disabled by default.
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Default: *false*
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Example:
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```bash
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nfd-master -verify-node-name -ca-file=/opt/nfd/ca.crt \
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-cert-file=/opt/nfd/master.crt -key-file=/opt/nfd/master.key
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```
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### -enable-nodefeature-api
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The `-enable-nodefeature-api` flag enables the
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[NodeFeature](../usage/custom-resources.md#nodefeature) CRD API for receiving
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feature requests. This will also automatically disable the gRPC interface.
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Default: false
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Example:
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```bash
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nfd-master -enable-nodefeature-api
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```
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### -enable-leader-election
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The `-enable-leader-election` flag enables leader election for NFD-Master.
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It is advised to turn on this flag when running more than one instance of
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NFD-Master.
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This flag takes effect only when combined with `-enable-nodefeature-api` flag.
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Default: false
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```bash
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nfd-master -enable-nodefeature-api -enable-leader-election
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```
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### -enable-taints
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The `-enable-taints` flag enables/disables node tainting feature of NFD.
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Default: *false*
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Example:
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```bash
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nfd-master -enable-taints=true
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```
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### -no-publish
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The `-no-publish` flag disables updates to the Node objects in the Kubernetes
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API server, making a "dry-run" flag for nfd-master. No Labels, Annotations or
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ExtendedResources of nodes are updated.
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Default: *false*
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Example:
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```bash
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nfd-master -no-publish
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```
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### -crd-controller
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The `-crd-controller` flag specifies whether the NFD CRD API controller is
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enabled or not. The controller is responsible for processing
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[NodeFeature](../usage/custom-resources.md#nodefeature) and
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[NodeFeatureRule](../usage/custom-resources.md#nodefeaturerule) objects.
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Default: *true*
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Example:
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```bash
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nfd-master -crd-controller=false
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```
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### -featurerules-controller
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**DEPRECATED**: use [`-crd-controller`](#-crd-controller) instead.
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### -label-whitelist
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The `-label-whitelist` specifies a regular expression for filtering feature
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labels based on their name. Each label must match against the given reqular
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expression in order to be published.
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Note: The regular expression is only matches against the "basename" part of the
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label, i.e. to the part of the name after '/'. The label namespace is omitted.
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Default: *empty*
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Example:
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```bash
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nfd-master -label-whitelist='.*cpuid\.'
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```
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### -extra-label-ns
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The `-extra-label-ns` flag specifies a comma-separated list of allowed feature
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label namespaces. This option can be used to allow
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other vendor or application specific namespaces for custom labels from the
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local and custom feature sources, even though these labels were denied using
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the `deny-label-ns` flag.
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The same namespace control and this flag applies Extended Resources (created
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with `-resource-labels`), too.
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Default: *empty*
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Example:
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```bash
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nfd-master -extra-label-ns=vendor-1.com,vendor-2.io
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```
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### -deny-label-ns
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The `-deny-label-ns` flag specifies a comma-separated list of excluded
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label namespaces. By default, nfd-master allows creating labels in all
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namespaces, excluding `kubernetes.io` namespace and its sub-namespaces
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(i.e. `*.kubernetes.io`). However, you should note that
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`kubernetes.io` and its sub-namespaces are always denied.
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For example, `nfd-master -deny-label-ns=""` would still disallow
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`kubernetes.io` and `*.kubernetes.io`.
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This option can be used to exclude some vendors or application specific
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namespaces.
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Note that the namespaces `feature.node.kubernetes.io` and `profile.node.kubernetes.io`
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and their sub-namespaces are always allowed and cannot be denied.
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Default: *empty*
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Example:
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```bash
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nfd-master -deny-label-ns=*.vendor.com,vendor-2.io
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```
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### -resource-labels
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**DEPRECATED**: [NodeFeatureRule](../usage/custom-resources.md#nodefeaturerule)
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should be used for managing extended resources in NFD.
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The `-resource-labels` flag specifies a comma-separated list of features to be
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advertised as extended resources instead of labels. Features that have integer
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values can be published as Extended Resources by listing them in this flag.
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Default: *empty*
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Example:
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```bash
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nfd-master -resource-labels=vendor-1.com/feature-1,vendor-2.io/feature-2
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```
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### -config
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The `-config` flag specifies the path of the nfd-master configuration file to
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use.
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Default: /etc/kubernetes/node-feature-discovery/nfd-master.conf
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Example:
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```bash
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nfd-master -config=/opt/nfd/master.conf
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```
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### -options
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The `-options` flag may be used to specify and override configuration file
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options directly from the command line. The required format is the same as in
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the config file i.e. JSON or YAML. Configuration options specified via this
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flag will override those from the configuration file:
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Default: *empty*
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Example:
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```bash
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nfd-master -options='{"noPublish": true}'
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```
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### -nfd-api-parallelism
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The `-nfd-api-parallelism` flag can be used to specify the maximum
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number of concurrent node updates.
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It takes effect only when `-enable-nodefeature-api` has been set.
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Default: 10
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Example:
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```bash
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nfd-master -nfd-api-parallelism=1
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```
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### Logging
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The following logging-related flags are inherited from the
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[klog](https://pkg.go.dev/k8s.io/klog/v2) package.
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#### -add_dir_header
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If true, adds the file directory to the header of the log messages.
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Default: false
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#### -alsologtostderr
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Log to standard error as well as files.
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Default: false
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#### -log_backtrace_at
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When logging hits line file:N, emit a stack trace.
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Default: *empty*
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#### -log_dir
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If non-empty, write log files in this directory.
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Default: *empty*
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#### -log_file
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If non-empty, use this log file.
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Default: *empty*
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#### -log_file_max_size
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Defines the maximum size a log file can grow to. Unit is megabytes. If the
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value is 0, the maximum file size is unlimited.
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Default: 1800
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#### -logtostderr
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Log to standard error instead of files
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Default: true
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#### -skip_headers
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If true, avoid header prefixes in the log messages.
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Default: false
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#### -skip_log_headers
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If true, avoid headers when opening log files.
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Default: false
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#### -stderrthreshold
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Logs at or above this threshold go to stderr.
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Default: 2
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#### -v
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Number for the log level verbosity.
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Default: 0
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#### -vmodule
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Comma-separated list of `pattern=N` settings for file-filtered logging.
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Default: *empty*
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### -resync-period
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The `-resync-period` flag specifies the NFD API controller resync period.
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The resync means nfd-master replaying all NodeFeature and NodeFeatureRule objects,
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thus effectively re-syncing all nodes in the cluster (i.e. ensuring labels, annotations,
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extended resources and taints are in place).
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Only has effect when the [NodeFeature](../usage/custom-resources.md#nodefeature)
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CRD API has been enabled with [`-enable-nodefeature-api`](master-commandline-reference.md#-enable-nodefeature-api).
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Default: 1 hour.
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Example:
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```bash
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nfd-master -resync-period=2h
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```
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