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https://github.com/kubernetes-sigs/node-feature-discovery.git
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8b4314bbbb
Implement a framework for more flexible rule configuration and matching, mimicking the MatchExpressions pattern from K8s nodeselector. The basic building block is MatchExpression which contains an operator and a list of values. The operator specifies that "function" that is applied when evaluating a given input agains the list of values. Available operators are: - MatchIn - MatchNotIn - MatchInRegexp - MatchExists - MatchDoesNotExist - MatchGt - MatchLt - MatchIsTrue - MatchIsFalse Another building block of the framework is MatchExpressionSet which is a map of string-MatchExpression pairs. It is a helper for specifying multiple expressions that can be matched against a set of set of features. This patch converts all existing custom rules to utilize the new expression-based framework.
38 lines
1.1 KiB
Go
38 lines
1.1 KiB
Go
/*
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Copyright 2020-2021 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package rules
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import (
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"fmt"
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"sigs.k8s.io/node-feature-discovery/source"
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"sigs.k8s.io/node-feature-discovery/source/cpu"
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"sigs.k8s.io/node-feature-discovery/source/custom/expression"
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)
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// CpuIDRule implements Rule for the custom source
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type CpuIDRule struct {
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expression.MatchExpressionSet
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}
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func (r *CpuIDRule) Match() (bool, error) {
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flags, ok := source.GetFeatureSource("cpu").GetFeatures().Keys[cpu.CpuidFeature]
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if !ok {
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return false, fmt.Errorf("cpuid information not available")
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}
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return r.MatchKeys(flags.Elements)
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}
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