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default_selector.go
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default_selector.go
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// Copyright Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package telemetry
import (
"istio.io/api/telemetry/v1alpha1"
"istio.io/istio/pkg/config"
"istio.io/istio/pkg/config/analysis"
"istio.io/istio/pkg/config/analysis/msg"
"istio.io/istio/pkg/config/resource"
"istio.io/istio/pkg/config/schema/gvk"
)
// DefaultSelectorAnalyzer validates, per namespace, that there aren't multiple
// telemetry resources that have no selector. This is distinct from
// SelectorAnalyzer because it does not require pods, so it can run even if that
// collection is unavailable.
type DefaultSelectorAnalyzer struct{}
var _ analysis.Analyzer = &DefaultSelectorAnalyzer{}
// Metadata implements Analyzer
func (a *DefaultSelectorAnalyzer) Metadata() analysis.Metadata {
return analysis.Metadata{
Name: "telemetry.DefaultSelectorAnalyzer",
Description: "Validates that there aren't multiple telemetry resources that have no selector",
Inputs: []config.GroupVersionKind{
gvk.Telemetry,
},
}
}
// Analyze implements Analyzer
func (a *DefaultSelectorAnalyzer) Analyze(c analysis.Context) {
nsToTelemetries := make(map[resource.Namespace][]*resource.Instance)
c.ForEach(gvk.Telemetry, func(r *resource.Instance) bool {
s := r.Message.(*v1alpha1.Telemetry)
ns := r.Metadata.FullName.Namespace
if s.Selector == nil {
nsToTelemetries[ns] = append(nsToTelemetries[ns], r)
}
return true
})
// Check for more than one selector-less telemetry instance, per namespace
for ns, sList := range nsToTelemetries {
if len(sList) > 1 {
sNames := getNames(sList)
for _, r := range sList {
c.Report(gvk.Telemetry, msg.NewMultipleTelemetriesWithoutWorkloadSelectors(r, sNames, string(ns)))
}
}
}
}