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https://github.com/kubernetes-sigs/node-feature-discovery.git
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7038e49d02
There are cases when the only available metadata for discovering features is the node's name. The "nodename" rule extends the custom source and matches when the node's name matches one of the given nodename regexp patterns. It is also possible now to set an optional "value" on custom rules, which overrides the default "true" label value in case the rule matches. In order to allow more dynamic configurations without having to modify the complete worker configuration, custom rules are additionally read from a "custom.d" directory now. Typically that directory will be filled by mounting one or more ConfigMaps. Signed-off-by: Marc Sluiter <msluiter@redhat.com>
50 lines
1.4 KiB
Go
50 lines
1.4 KiB
Go
/*
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Copyright 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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"log"
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"os"
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"regexp"
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)
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var (
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nodeName = os.Getenv("NODE_NAME")
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)
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// Rule that matches on nodenames configured in a ConfigMap
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type NodenameRule []string
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// Force implementation of Rule
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var _ Rule = NodenameRule{}
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func (n NodenameRule) Match() (bool, error) {
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for _, nodenamePattern := range n {
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log.Printf("DEBUG: matchNodename %s", nodenamePattern)
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match, err := regexp.MatchString(nodenamePattern, nodeName)
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if err != nil {
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log.Printf("ERROR: nodename rule: invalid nodename regexp %q: %v", nodenamePattern, err)
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continue
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}
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if !match {
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//log.Printf("DEBUG: nodename rule: No match for pattern %q with node %q", nodenamePattern, nodeName)
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continue
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}
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//log.Printf("DEBUG: nodename rule: Match for pattern %q with node %q", nodenamePattern, nodeName)
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return true, nil
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}
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return false, nil
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}
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