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No need to ScrubDNS anymore

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This commit is contained in:
wlan0
2016-11-08 16:19:53 -08:00
parent c8a572310f
commit 78ab19c9c5
2 changed files with 9 additions and 48 deletions
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27
pkg/kubelet/kubelet_network.go
View File

@@ -89,25 +89,10 @@ func (kl *Kubelet) providerRequiresNetworkingConfiguration() bool {
return supported
}
// Returns the list of DNS servers and DNS search domains.
func (kl *Kubelet) parseResolvConf(reader io.Reader) (nameservers []string, searches []string, err error) {
var scrubber dnsScrubber
if kl.cloud != nil {
scrubber = kl.cloud
}
return parseResolvConf(reader, scrubber)
}
// A helper for testing.
type dnsScrubber interface {
ScrubDNS(nameservers, searches []string) (nsOut, srchOut []string)
}
// parseResolveConf reads a resolv.conf file from the given reader, and parses
// it into nameservers and searches, possibly returning an error. The given
// dnsScrubber allows cloud providers to post-process dns names.
// it into nameservers and searches, possibly returning an error.
// TODO: move to utility package
func parseResolvConf(reader io.Reader, dnsScrubber dnsScrubber) (nameservers []string, searches []string, err error) {
func (kl *Kubelet) parseResolvConf(reader io.Reader) (nameservers []string, searches []string, err error) {
file, err := ioutil.ReadAll(reader)
if err != nil {
return nil, nil, err
@@ -137,10 +122,10 @@ func parseResolvConf(reader io.Reader, dnsScrubber dnsScrubber) (nameservers []s
}
}
// Give the cloud-provider a chance to post-process DNS settings.
if dnsScrubber != nil {
nameservers, searches = dnsScrubber.ScrubDNS(nameservers, searches)
}
// There used to be code here to scrub DNS for each cloud, but doesn't
// make sense anymore since cloudproviders are being factored out.
// contact @thockin or @wlan0 for more information
return nameservers, searches, nil
}

30
pkg/kubelet/kubelet_network_test.go
View File

@@ -66,15 +66,6 @@ func TestNodeIPParam(t *testing.T) {
}
}
type countingDNSScrubber struct {
counter *int
}
func (cds countingDNSScrubber) ScrubDNS(nameservers, searches []string) (nsOut, srchOut []string) {
(*cds.counter)++
return nameservers, searches
}
func TestParseResolvConf(t *testing.T) {
testCases := []struct {
data string
@@ -104,8 +95,10 @@ func TestParseResolvConf(t *testing.T) {
{"nameserver 1.2.3.4\nsearch foo\nnameserver 5.6.7.8\nsearch bar", []string{"1.2.3.4", "5.6.7.8"}, []string{"bar"}},
{"#comment\nnameserver 1.2.3.4\n#comment\nsearch foo\ncomment", []string{"1.2.3.4"}, []string{"foo"}},
}
testKubelet := newTestKubelet(t, false /* controllerAttachDetachEnabled */)
kubelet := testKubelet.kubelet
for i, tc := range testCases {
ns, srch, err := parseResolvConf(strings.NewReader(tc.data), nil)
ns, srch, err := kubelet.parseResolvConf(strings.NewReader(tc.data))
if err != nil {
t.Errorf("expected success, got %v", err)
continue
@@ -116,23 +109,6 @@ func TestParseResolvConf(t *testing.T) {
if !reflect.DeepEqual(srch, tc.searches) {
t.Errorf("[%d] expected searches %#v, got %#v", i, tc.searches, srch)
}
counter := 0
cds := countingDNSScrubber{&counter}
ns, srch, err = parseResolvConf(strings.NewReader(tc.data), cds)
if err != nil {
t.Errorf("expected success, got %v", err)
continue
}
if !reflect.DeepEqual(ns, tc.nameservers) {
t.Errorf("[%d] expected nameservers %#v, got %#v", i, tc.nameservers, ns)
}
if !reflect.DeepEqual(srch, tc.searches) {
t.Errorf("[%d] expected searches %#v, got %#v", i, tc.searches, srch)
}
if counter != 1 {
t.Errorf("[%d] expected dnsScrubber to have been called: got %d", i, counter)
}
}
}