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mw/k8s: cleanups (#893)

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* mw/k8s: cleanups

Remove some constants that aren't used any more. Make PrimaryZone
private because it doesn't need to be exported. Remove test that
did not cover corner case as expressed in setup.go

* cleanup this as well
This commit is contained in:
Miek Gieben
2017-08-11 16:21:07 +01:00
committed by GitHub
parent 028a6db4d6
commit 241e3dbcb7
4 changed files with 12 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
middleware/kubernetes/kubernetes.go
View File

@@ -32,7 +32,6 @@ import (
type Kubernetes struct { type Kubernetes struct {
Next middleware.Handler Next middleware.Handler
Zones []string Zones []string
primaryZone int
Proxy proxy.Proxy // Proxy for looking up names during the resolution process Proxy proxy.Proxy // Proxy for looking up names during the resolution process
APIServerList []string APIServerList []string
APIProxy *apiProxy APIProxy *apiProxy
@@ -49,6 +48,7 @@ type Kubernetes struct {
ReverseCidrs []net.IPNet ReverseCidrs []net.IPNet
Fallthrough bool Fallthrough bool
primaryZoneIndex int
interfaceAddrsFunc func() net.IP interfaceAddrsFunc func() net.IP
autoPathSearch []string // Local search path from /etc/resolv.conf. Needed for autopath. autoPathSearch []string // Local search path from /etc/resolv.conf. Needed for autopath.
} }
@@ -154,9 +154,9 @@ func (k *Kubernetes) Services(state request.Request, exact bool, opt middleware.
return nil, nil, nil return nil, nil, nil
} }
// PrimaryZone will return the first non-reverse zone being handled by this middleware // primaryZone will return the first non-reverse zone being handled by this middleware
func (k *Kubernetes) PrimaryZone() string { func (k *Kubernetes) primaryZone() string {
return k.Zones[k.primaryZone] return k.Zones[k.primaryZoneIndex]
} }
// Lookup implements the ServiceBackend interface. // Lookup implements the ServiceBackend interface.
@@ -538,7 +538,7 @@ func (k *Kubernetes) getServiceRecordForIP(ip, name string) []msg.Service {
continue continue
} }
if service.Spec.ClusterIP == ip { 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}} return []msg.Service{{Host: domain}}
} }
} }
@@ -551,7 +551,7 @@ func (k *Kubernetes) getServiceRecordForIP(ip, name string) []msg.Service {
for _, eps := range ep.Subsets { for _, eps := range ep.Subsets {
for _, addr := range eps.Addresses { for _, addr := range eps.Addresses {
if addr.IP == ip { 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}} return []msg.Service{{Host: domain}}
} }
} }

10
middleware/kubernetes/kubernetes_test.go
View File

@@ -10,15 +10,6 @@ import (
"k8s.io/client-go/1.5/pkg/api" "k8s.io/client-go/1.5/pkg/api"
) )
func TestPrimaryZone(t *testing.T) {
k := Kubernetes{Zones: []string{"inter.webs.test", "inter.nets.test"}}
expected := "inter.webs.test"
result := k.PrimaryZone()
if result != expected {
t.Errorf("Expected result '%v'. Instead got result '%v'.", expected, result)
}
}
func TestWildcard(t *testing.T) { func TestWildcard(t *testing.T) {
var tests = []struct { var tests = []struct {
s string s string
@@ -104,7 +95,6 @@ func (APIConnServiceTest) ServiceList() []*api.Service {
}, },
} }
return svcs return svcs
} }
func (APIConnServiceTest) EndpointsList() api.EndpointsList { func (APIConnServiceTest) EndpointsList() api.EndpointsList {

4
middleware/kubernetes/reverse_test.go
View File

@@ -14,13 +14,13 @@ func TestIsRequestInReverseRange(t *testing.T) {
}{ }{
{"1.2.3.0/24", "4.3.2.1.in-addr.arpa.", true}, {"1.2.3.0/24", "4.3.2.1.in-addr.arpa.", true},
{"1.2.3.0/24", "5.3.2.1.in-addr.arpa.", true}, {"1.2.3.0/24", "5.3.2.1.in-addr.arpa.", true},
{"5.6.0.0/16", "5.4.6.5.in-addr.arpa.", true},
{"1.2.3.0/24", "5.4.2.1.in-addr.arpa.", false}, {"1.2.3.0/24", "5.4.2.1.in-addr.arpa.", false},
{"5.6.0.0/16", "5.4.2.1.in-addr.arpa.", false}, {"5.6.0.0/16", "5.4.2.1.in-addr.arpa.", false},
{"5.6.0.0/16", "5.4.6.5.in-addr.arpa.", true},
{"5.6.0.0/16", "5.6.0.1.in-addr.arpa.", false}, {"5.6.0.0/16", "5.6.0.1.in-addr.arpa.", false},
} }
k := Kubernetes{Zones: []string{"inter.webs.test"}} k := Kubernetes{}
for _, test := range tests { for _, test := range tests {
_, cidr, _ := net.ParseCIDR(test.cidr) _, cidr, _ := net.ParseCIDR(test.cidr)

12
middleware/kubernetes/setup.go
View File

@@ -87,16 +87,16 @@ func kubernetesParse(c *caddy.Controller) (*Kubernetes, error) {
} }
} }
k8s.primaryZone = -1 k8s.primaryZoneIndex = -1
for i, z := range k8s.Zones { for i, z := range k8s.Zones {
if strings.HasSuffix(z, "in-addr.arpa.") || strings.HasSuffix(z, "ip6.arpa.") { if strings.HasSuffix(z, "in-addr.arpa.") || strings.HasSuffix(z, "ip6.arpa.") {
continue continue
} }
k8s.primaryZone = i k8s.primaryZoneIndex = i
break break
} }
if k8s.primaryZone == -1 { if k8s.primaryZoneIndex == -1 {
return nil, errors.New("non-reverse zone name must be given for Kubernetes") return nil, errors.New("non-reverse zone name must be given for Kubernetes")
} }
@@ -222,8 +222,4 @@ func searchFromResolvConf() []string {
return rc.Search return rc.Search
} }
const ( const defaultResyncPeriod = 5 * time.Minute
defaultResyncPeriod = 5 * time.Minute
defautNdots = 0
defaultOnNXDOMAIN = dns.RcodeSuccess
)