This patch adds sample NodeFeatureRules that correspond the built-in
labels created by nfd-worker (with its default configuration).
The samples provide examples on how to utilize NodeFeatureRules and an
easy way to modify the labels being generated. In order to replace the
built-in node labeling of nfd-worker with these sample rules, all node
labeling from nfd-worker must be disabled by setting the
"core.labelSources" configuration option to an empty list (or specify
"-label-sources= " on the command line). Then, with all nfd-worker side
labeling disabled, just apply the rules with
kubectl apply -f samples/
Extend the format of feature matcher terms (the elements of the
arrayspecified under under matchFeatures field) with new matchName
field. The value of this field is an expression that is evaluated
against the names of feature elements instead of their values (values
are matched with the matchExpressions field, instead).
The matchName field is useful e.g. in template rules for creating
per-feature-element labels based on feature names (instead of values)
and in non-template rules for checking if (at least) one of certain
feature element names are present.
If both matchExpressions and matchName for certain feature matcher term
is specified, they both must match in order to get an overall match.
Also, in this case the list of matched features (used in templating) is
the union of the results from matchExpressions and matchName.
An example of creating an "avx512" label if any AVX512* CPUID feature is
present:
- name: "avx wildcard rule"
labels:
avx512: "true"
matchFeatures:
- feature: cpu.cpuid
matchName: {op: InRegexp, value: ["^AVX512"]}
An example of a template rule creating a dynamic set of labels based on
the existence of certain kconfig options.
- name: "kconfig template rule"
labelsTemplate: |
{{ range .kernel.config }}kconfig-{{ .Name }}={{ .Value }}
{{ end }}
matchFeatures:
- feature: kernel.config
matchName: {op: In, value: ["SWAP", "X86", "ARM"]}
NOTE: this patch changes the corner case of nil/null match expressions
with instance features (i.e. "matchExpressions: null"). Previously, we
returned all instances for templating but now a nil match expression is
not evaluated and no instances for templating are returned.
Drop the creation helper functions as one step in an effort to tidy up
the api package. These functions were not much used outside unit tests
anyway, the static rules of the nfd-worker custom feature source being
the only exception (and if those happened to be invalid we'd catch that
e.g. in the e2e-tests).
This patch creates a owner-dependent relationship between the
nfd-worker pod and the NodeFeature object that it creates. With this
change the orphaned NodeFeature object(s) gets automatically
garbage-collected when the nfd-worker pod goes away, without the need
for manual clean-up actions.
The "combined" overlay, deploying nfd-master and nfd-worker in the same
pod (with a daemonset) doesn't make sense anymore as we have enabled
NodeFeature API. There is no direct communication between nfd-master and
nfd-worker anymore, Moreover, the combined deployment can be seen as
broken as there is one NodeFeature controller (i.e. nfd-master) on each
node, causing them to race against each other, all processing all
NodeFeature objects.
