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middleware/kubernetes: define consts (#824)

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Define two consts Pod and Svc, makes it stand out a little more
when used in switches in case.

We have opted for a new type, but then you need to convert them
all the time with string(Foo).
This commit is contained in:
Miek Gieben 2017-08-04 07:34:00 -07:00 • committed by John Belamaric
parent d0d7f4c89a
commit 21386ebdd5
3 changed files with 22 additions and 17 deletions
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29
middleware/kubernetes/kubernetes.go
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@ -419,9 +419,9 @@ func (k *Kubernetes) getRecordsForK8sItems(services []service, pods []pod, r rec
Port: int(ep.port.Port),
}
if r.federation != "" {
s.Key = strings.Join([]string{zonePath, "svc", r.federation, svc.namespace, svc.name, endpointHostname(ep.addr)}, "/")
s.Key = strings.Join([]string{zonePath, Svc, r.federation, svc.namespace, svc.name, endpointHostname(ep.addr)}, "/")
} else {
s.Key = strings.Join([]string{zonePath, "svc", svc.namespace, svc.name, endpointHostname(ep.addr)}, "/")
s.Key = strings.Join([]string{zonePath, Svc, svc.namespace, svc.name, endpointHostname(ep.addr)}, "/")
}
records = append(records, s)
}
@ -433,22 +433,22 @@ func (k *Kubernetes) getRecordsForK8sItems(services []service, pods []pod, r rec
Port: int(p.Port)}
if r.federation != "" {
s.Key = strings.Join([]string{zonePath, "svc", r.federation, svc.namespace, svc.name}, "/")
s.Key = strings.Join([]string{zonePath, Svc, r.federation, svc.namespace, svc.name}, "/")
} else {
s.Key = strings.Join([]string{zonePath, "svc", svc.namespace, svc.name}, "/")
s.Key = strings.Join([]string{zonePath, Svc, svc.namespace, svc.name}, "/")
}
records = append(records, s)
}
// If the addr is not an IP (i.e. an external service), add the record ...
s := msg.Service{
Key: strings.Join([]string{zonePath, "svc", svc.namespace, svc.name}, "/"),
Key: strings.Join([]string{zonePath, Svc, svc.namespace, svc.name}, "/"),
Host: svc.addr}
if t, _ := s.HostType(); t == dns.TypeCNAME {
if r.federation != "" {
s.Key = strings.Join([]string{zonePath, "svc", r.federation, svc.namespace, svc.name}, "/")
s.Key = strings.Join([]string{zonePath, Svc, r.federation, svc.namespace, svc.name}, "/")
} else {
s.Key = strings.Join([]string{zonePath, "svc", svc.namespace, svc.name}, "/")
s.Key = strings.Join([]string{zonePath, Svc, svc.namespace, svc.name}, "/")
}
records = append(records, s)
}
@ -458,7 +458,7 @@ func (k *Kubernetes) getRecordsForK8sItems(services []service, pods []pod, r rec
for _, p := range pods {
s := msg.Service{
Key: strings.Join([]string{zonePath, "pod", p.namespace, p.name}, "/"),
Key: strings.Join([]string{zonePath, Pod, p.namespace, p.name}, "/"),
Host: p.addr,
}
records = append(records, s)
@ -533,7 +533,7 @@ func (k *Kubernetes) findPods(namespace, podname string) (pods []pod, err error)
// get retrieves matching data from the cache.
func (k *Kubernetes) get(r recordRequest) (services []service, pods []pod, err error) {
switch {
case r.typeName == "pod":
case r.typeName == Pod:
pods, err = k.findPods(r.namespace, r.service)
return nil, pods, err
default:
@ -630,7 +630,7 @@ func (k *Kubernetes) getServiceRecordForIP(ip, name string) []msg.Service {
continue
}
if service.Spec.ClusterIP == ip {
domain := strings.Join([]string{service.Name, service.Namespace, "svc", k.PrimaryZone()}, ".")
domain := strings.Join([]string{service.Name, service.Namespace, Svc, k.PrimaryZone()}, ".")
return []msg.Service{{Host: domain}}
}
}
@ -643,7 +643,7 @@ func (k *Kubernetes) getServiceRecordForIP(ip, name string) []msg.Service {
for _, eps := range ep.Subsets {
for _, addr := range eps.Addresses {
if addr.IP == ip {
domain := strings.Join([]string{endpointHostname(addr), ep.ObjectMeta.Name, ep.ObjectMeta.Namespace, "svc", k.PrimaryZone()}, ".")
domain := strings.Join([]string{endpointHostname(addr), ep.ObjectMeta.Name, ep.ObjectMeta.Namespace, Svc, k.PrimaryZone()}, ".")
return []msg.Service{{Host: domain}}
}
}
@ -675,9 +675,14 @@ func localPodIP() net.IP {
}
func splitSearch(zone, question, namespace string) (name, search string, ok bool) {
search = strings.Join([]string{namespace, "svc", zone}, ".")
search = strings.Join([]string{namespace, Svc, zone}, ".")
if dns.IsSubDomain(search, question) {
return question[:len(question)-len(search)-1], search, true
}
return "", "", false
}
const (
Svc = "svc"
Pod = "pod"
)