Simplify the code and reduce possible error scenarios by dropping
fsnotify-based reconfiguration from nfd-master and nfd-worker. Also
eliminates repeated re-configuration in scenarios where kubelet
continuosly touches the (every minute) mounted file (configmap) on the
filesystem.
Also modifies the Helm and kustomize deployments so that nfd-master,
nfd-worker and nfd-topology-updater pods are restarted on configmap
updates. In kustomize, the slght downside of this is the name of the
config map(s) depends on the content, so every time a user customizes
the config data, the old unused configmap will be left and must be
garbage-collected manually.
The feature gate is locked to true. That is, it is not possible to revert
back to the gPRC-based communication which makes the gRPC API ready for
removal.
The NodeFeatureGroup is an NFD-specific custom resource that is designed for
grouping nodes based on their features. NFD-Master watches for NodeFeatureGroup
objects in the cluster and updates the status of the NodeFeatureGroup object
with the list of nodes that match the feature group rules. The NodeFeatureGroup
rules follow the same syntax as the NodeFeatureRule rules.
Signed-off-by: Carlos Eduardo Arango Gutierrez <eduardoa@nvidia.com>
Don't import the kubernetes tests/e2e "root" package (we still use the
test/e2e/framework). We only used the simple e2e runner function from
there so copy that over to the nfd test/e2e package. This change removes
a lot of dependencies speeding up builds.
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.
Make the handling of unprefixed names (of labels, annotations and
extended resources) well-defined and predictable. Previously the
resulting output was not predictable in case the same name was coming in
both the unprefixed and prefixed form, say unprefixed "foo=bar" coming from
one source (be it nfd-worker or NodeFeature(Rule)) and
"feature.node.kubernetes.io/foo=baz" from a NodeFeature(Rule).
Previously the output value was randomly either "bar" or "baz".
This patch adds prefixes to all names early in the processing
"pipeline", preventing random name clashes later on.
In some occasions the node status (capacity) takes a lot of time to
update. Increase the timeout on extended resource tests. Revert the default
timeout back to 10s.
This patch addresses issues with slow node status (extended resources)
updates. Previously we did just a few retries in quick succession which
could result in the node update failing, just because node status was
updated slower than our retry window. The patch mitigates the issue by
increasing the number of tries to 15. In addition, it creates a
ratelimiter with a longer per-item (per-node) base delay.
The patch also fixes the e2e-tests to expose the issue.
We now have metrics for getting detailed information about the NFD
instances running. There should be no need to pollute the node object
with NFD version annotations.
One problem with the annotations also that they were incomplete in the
sense that they only covered nfd-master and nfd-worker but not
nfd-topology-updater or nfd-gc.
Also, there was a problem with stale annotations, giving misleading
information. E.g. there was no way to remove old/stale master.version
annotations if nfd-master was scheduled on another node where it was
previously running.
