59 lines
1.4 KiB
Go
59 lines
1.4 KiB
Go
package kubernetes
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import (
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"github.com/coredns/coredns/plugin"
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"github.com/coredns/coredns/plugin/kubernetes/object"
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"github.com/coredns/coredns/request"
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)
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// AutoPath implements the AutoPathFunc call from the autopath plugin.
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// It returns a per-query search path or nil indicating no searchpathing should happen.
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func (k *Kubernetes) AutoPath(state request.Request) []string {
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// Check if the query falls in a zone we are actually authoritative for and thus if we want autopath.
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zone := plugin.Zones(k.Zones).Matches(state.Name())
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if zone == "" {
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return nil
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}
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// cluster.local {
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// autopath @kubernetes
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// kubernetes {
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// pods verified #
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// }
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// }
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// if pods != verified will cause panic and return SERVFAIL, expect worked as normal without autopath function
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if !k.opts.initPodCache {
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return nil
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}
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ip := state.IP()
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pod := k.podWithIP(ip)
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if pod == nil {
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return nil
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}
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search := make([]string, 3)
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if zone == "." {
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search[0] = pod.Namespace + ".svc."
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search[1] = "svc."
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search[2] = "."
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} else {
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search[0] = pod.Namespace + ".svc." + zone
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search[1] = "svc." + zone
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search[2] = zone
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}
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search = append(search, k.autoPathSearch...)
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search = append(search, "") // sentinel
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return search
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}
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// podWithIP return the api.Pod for source IP. It returns nil if nothing can be found.
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func (k *Kubernetes) podWithIP(ip string) *object.Pod {
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ps := k.APIConn.PodIndex(ip)
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if len(ps) == 0 {
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return nil
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}
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return ps[0]
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}
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