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package kubernetes
import (
"context"
"github.com/coredns/coredns/plugin"
"github.com/coredns/coredns/plugin/metadata"
"github.com/coredns/coredns/request"
)
// Metadata implements the metadata.Provider interface.
func (k *Kubernetes) Metadata(ctx context.Context, state request.Request) context.Context {
pod := k.podWithIP(state.IP())
if pod != nil {
metadata.SetValueFunc(ctx, "kubernetes/client-namespace", func() string {
return pod.Namespace
})
metadata.SetValueFunc(ctx, "kubernetes/client-pod-name", func() string {
return pod.Name
})
}
zone := plugin.Zones(k.Zones).Matches(state.Name())
if zone == "" {
return ctx
}
// possible optimization: cache r so it doesn't need to be calculated again in ServeDNS
r, err := parseRequest(state.Name(), zone)
if err != nil {
metadata.SetValueFunc(ctx, "kubernetes/parse-error", func() string {
return err.Error()
})
return ctx
}
metadata.SetValueFunc(ctx, "kubernetes/port-name", func() string {
return r.port
})
metadata.SetValueFunc(ctx, "kubernetes/protocol", func() string {
return r.protocol
})
metadata.SetValueFunc(ctx, "kubernetes/endpoint", func() string {
return r.endpoint
})
metadata.SetValueFunc(ctx, "kubernetes/service", func() string {
return r.service
})
metadata.SetValueFunc(ctx, "kubernetes/namespace", func() string {
return r.namespace
})
metadata.SetValueFunc(ctx, "kubernetes/kind", func() string {
return r.podOrSvc
})
return ctx
}
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