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node-feature-discovery/deployment/helm/node-feature-discovery
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Markus Lehtonen f75303ce43 pkg/apis/nfd: add variables to rule spec and support backreferences 
Support backreferencing of output values from previous rules. Enables
complex rule setups where custom features are further combined together
to form even more sophisticated higher level labels. The labels created
by preceding rules are available as a special 'rule.matched' feature
(for matchFeatures to use).

If referencing rules accross multiple configs/CRDs care must be taken
with the ordering. Processing order of rules in nfd-worker:

1. Static rules
2. Files from /etc/kubernetes/node-feature-discovery/custom.d/
   in alphabetical order. Subdirectories are processed by reading their
   files in alphabetical order.
3. Custom rules from main nfd-worker.conf

In nfd-master, NodeFeatureRule objects are processed in alphabetical
order (based on their metadata.name).

This patch also adds new 'vars' fields to the rule spec. Like 'labels',
it is a map of key-value pairs but no labels are generated from these.
The values specified in 'vars' are only added for backreferencing into
the 'rules.matched' feature. This may by desired in schemes where the
output of certain rules is only used as intermediate variables for other
rules and no labels out of these are wanted.

An example setup:

  - name: "kernel feature"
    labels:
      kernel-feature:
    matchFeatures:
      - feature: kernel.version
        matchExpressions:
          major: {op: Gt, value: ["4"]}

  - name: "intermediate var feature"
    vars:
      nolabel-feature: "true"
    matchFeatures:
      - feature: cpu.cpuid
        matchExpressions:
          AVX512F: {op: Exists}
      - feature: pci.device
        matchExpressions:
          vendor: {op: In, value: ["8086"]}
          device: {op: In, value: ["1234", "1235"]}

  - name: top-level-feature
    matchFeatures:
      - feature: rule.matched
        matchExpressions:
          kernel-feature: "true"
          nolabel-feature: "true"
2021-11-25 12:50:47 +02:00
..
manifests pkg/apis/nfd: add variables to rule spec and support backreferences 2021-11-25 12:50:47 +02:00
templates nfd-master: add -featurerules-controller flag 2021-11-22 16:57:42 +02:00
.helmignore helm: move files under deployment/helm 2021-08-16 14:44:26 +03:00
Chart.yaml deployment: optional mount of /usr/src 2021-08-26 10:52:26 +02:00
README.md helm: move files under deployment/helm 2021-08-16 14:44:26 +03:00
values.yaml pkg/apis/nfd: add variables to rule spec and support backreferences 2021-11-25 12:50:47 +02:00

README.md

Node Feature Discovery

Node Feature Discovery (NFD) is a Kubernetes add-on for detecting hardware features and system configuration. Detected features are advertised as node labels. NFD provides flexible configuration and extension points for a wide range of vendor and application specific node labeling needs.

See NFD documentation for deployment instructions.