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plugin/kubernetes: partial fix for crazy pod queries (#1349)

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This is probably the first in a series to fix "crazy" pod queries.
If the namespace doesn't exist return NXDOMAIN.

It might be worth extending this 1:1 to findServices as well.
This commit is contained in:
Miek Gieben 2018-01-05 17:48:08 +00:00 • committed by GitHub
parent 58221f55db
commit f62189372a
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2 changed files with 21 additions and 10 deletions
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24
plugin/kubernetes/kubernetes.go
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@ -311,6 +311,19 @@ func (k *Kubernetes) findPods(r recordRequest, zone string) (pods []msg.Service,
zonePath := msg.Path(zone, "coredns")
ip := ""
if strings.Count(podname, "-") == 3 && !strings.Contains(podname, "--") {
ip = strings.Replace(podname, "-", ".", -1)
} else {
ip = strings.Replace(podname, "-", ":", -1)
}
if k.podMode == podModeInsecure {
if !wildcard(namespace) && !k.namespace(namespace) { // no wildcard, but namespace does not exist
return nil, errNoItems
}
return []msg.Service{{Key: strings.Join([]string{zonePath, Pod, namespace, podname}, "/"), Host: ip, TTL: k.ttl}}, err
}
err = errNoItems
if wildcard(podname) && !wildcard(namespace) {
// If namespace exist, err should be nil, so that we return nodata instead of NXDOMAIN
@ -319,22 +332,13 @@ func (k *Kubernetes) findPods(r recordRequest, zone string) (pods []msg.Service,
}
}
if strings.Count(podname, "-") == 3 && !strings.Contains(podname, "--") {
ip = strings.Replace(podname, "-", ".", -1)
} else {
ip = strings.Replace(podname, "-", ":", -1)
}
if k.podMode == podModeInsecure {
return []msg.Service{{Key: strings.Join([]string{zonePath, Pod, namespace, podname}, "/"), Host: ip, TTL: k.ttl}}, nil
}
// PodModeVerified
for _, p := range k.APIConn.PodIndex(ip) {
// If namespace has a wildcard, filter results against Corefile namespace list.
if wildcard(namespace) && !k.namespaceExposed(p.Namespace) {
continue
}
// check for matching ip and namespace
if ip == p.Status.PodIP && match(namespace, p.Namespace) {
s := msg.Service{Key: strings.Join([]string{zonePath, Pod, namespace, podname}, "/"), Host: ip, TTL: k.ttl}