mirror of
https://github.com/coredns/coredns.git
synced 2025-10-31 18:23:13 -04:00
edf71fb168
* initial commit * add config options * add readme * rewording * revert unlreated change * normalize host domain path * add ndots opt, allow > 1 host domains, pull host domains from resolv.conf * implementing review feedback * update readme * use dns lib, config format, defaults * Correct autopath example.
825 lines
16 KiB
Go
825 lines
16 KiB
Go
package kubernetes
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import (
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"net"
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"os"
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"reflect"
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"strings"
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"testing"
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"time"
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"github.com/coredns/coredns/middleware/test"
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"github.com/mholt/caddy"
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"github.com/miekg/dns"
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unversionedapi "k8s.io/client-go/1.5/pkg/api/unversioned"
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)
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func parseCidr(cidr string) net.IPNet {
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_, ipnet, _ := net.ParseCIDR(cidr)
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return *ipnet
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}
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func TestKubernetesParse(t *testing.T) {
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f, rm, err := test.TempFile(os.TempDir(), testResolveConf)
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autoPathResolvConfFile := f
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if err != nil {
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t.Fatalf("Could not create resolv.conf TempFile: %s", err)
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}
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defer rm()
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tests := []struct {
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description string // Human-facing description of test case
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input string // Corefile data as string
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shouldErr bool // true if test case is exected to produce an error.
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expectedErrContent string // substring from the expected error. Empty for positive cases.
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expectedZoneCount int // expected count of defined zones.
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expectedNSCount int // expected count of namespaces.
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expectedResyncPeriod time.Duration // expected resync period value
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expectedLabelSelector string // expected label selector value
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expectedPodMode string
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expectedCidrs []net.IPNet
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expectedFallthrough bool
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expectedUpstreams []string
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expectedFederations []Federation
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expectedAutoPath AutoPath
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}{
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// positive
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{
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"kubernetes keyword with one zone",
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`kubernetes coredns.local`,
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false,
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"",
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1,
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0,
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defaultResyncPeriod,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"kubernetes keyword with multiple zones",
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`kubernetes coredns.local test.local`,
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false,
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"",
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2,
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0,
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defaultResyncPeriod,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"kubernetes keyword with zone and empty braces",
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`kubernetes coredns.local {
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}`,
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false,
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"",
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1,
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0,
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defaultResyncPeriod,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"endpoint keyword with url",
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`kubernetes coredns.local {
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endpoint http://localhost:9090
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}`,
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false,
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"",
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1,
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0,
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defaultResyncPeriod,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"namespaces keyword with one namespace",
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`kubernetes coredns.local {
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namespaces demo
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}`,
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false,
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"",
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1,
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1,
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defaultResyncPeriod,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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nil,
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AutoPath{},
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},
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{
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"namespaces keyword with multiple namespaces",
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`kubernetes coredns.local {
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namespaces demo test
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}`,
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false,
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"",
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1,
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2,
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defaultResyncPeriod,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"resync period in seconds",
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`kubernetes coredns.local {
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resyncperiod 30s
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}`,
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false,
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"",
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1,
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0,
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30 * time.Second,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"resync period in minutes",
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`kubernetes coredns.local {
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resyncperiod 15m
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}`,
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false,
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"",
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1,
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0,
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15 * time.Minute,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"basic label selector",
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`kubernetes coredns.local {
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labels environment=prod
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}`,
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false,
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"",
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1,
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0,
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defaultResyncPeriod,
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"environment=prod",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"multi-label selector",
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`kubernetes coredns.local {
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labels environment in (production, staging, qa),application=nginx
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}`,
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false,
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"",
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1,
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0,
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defaultResyncPeriod,
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"application=nginx,environment in (production,qa,staging)",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"fully specified valid config",
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`kubernetes coredns.local test.local {
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resyncperiod 15m
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endpoint http://localhost:8080
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namespaces demo test
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labels environment in (production, staging, qa),application=nginx
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fallthrough
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}`,
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false,
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"",
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2,
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2,
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15 * time.Minute,
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"application=nginx,environment in (production,qa,staging)",
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defaultPodMode,
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nil,
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true,
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nil,
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[]Federation{},
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AutoPath{},
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},
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// negative
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{
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"no kubernetes keyword",
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"",
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true,
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"kubernetes setup called without keyword 'kubernetes' in Corefile",
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-1,
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-1,
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defaultResyncPeriod,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"kubernetes keyword without a zone",
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`kubernetes`,
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true,
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"zone name must be provided for kubernetes middleware",
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-1,
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0,
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defaultResyncPeriod,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"endpoint keyword without an endpoint value",
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`kubernetes coredns.local {
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endpoint
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}`,
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true,
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"rong argument count or unexpected line ending",
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-1,
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-1,
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defaultResyncPeriod,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"namespace keyword without a namespace value",
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`kubernetes coredns.local {
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namespaces
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}`,
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true,
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"rong argument count or unexpected line ending",
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-1,
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-1,
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defaultResyncPeriod,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"resyncperiod keyword without a duration value",
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`kubernetes coredns.local {
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resyncperiod
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}`,
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true,
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"rong argument count or unexpected line ending",
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-1,
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0,
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0 * time.Minute,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"resync period no units",
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`kubernetes coredns.local {
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resyncperiod 15
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}`,
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true,
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"unable to parse resync duration value",
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-1,
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0,
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0 * time.Second,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"resync period invalid",
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`kubernetes coredns.local {
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resyncperiod abc
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}`,
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true,
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"unable to parse resync duration value",
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-1,
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0,
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0 * time.Second,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"labels with no selector value",
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`kubernetes coredns.local {
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labels
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}`,
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true,
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"rong argument count or unexpected line ending",
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-1,
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0,
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0 * time.Second,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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{
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"labels with invalid selector value",
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`kubernetes coredns.local {
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labels environment in (production, qa
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}`,
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true,
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"unable to parse label selector",
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-1,
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0,
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0 * time.Second,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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// pods disabled
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{
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"pods disabled",
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`kubernetes coredns.local {
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pods disabled
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}`,
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false,
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"",
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1,
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0,
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defaultResyncPeriod,
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"",
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PodModeDisabled,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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// pods insecure
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{
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"pods insecure",
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`kubernetes coredns.local {
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pods insecure
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}`,
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false,
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"",
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1,
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0,
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defaultResyncPeriod,
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"",
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PodModeInsecure,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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// pods verified
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{
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"pods verified",
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`kubernetes coredns.local {
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pods verified
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}`,
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false,
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"",
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1,
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0,
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defaultResyncPeriod,
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"",
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PodModeVerified,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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// pods invalid
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{
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"invalid pods mode",
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`kubernetes coredns.local {
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pods giant_seed
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}`,
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true,
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"rong value for pods",
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-1,
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0,
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defaultResyncPeriod,
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"",
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PodModeVerified,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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// cidrs ok
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{
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"valid cidrs",
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`kubernetes coredns.local {
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cidrs 10.0.0.0/24 10.0.1.0/24
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}`,
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false,
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"",
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1,
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0,
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defaultResyncPeriod,
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"",
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defaultPodMode,
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[]net.IPNet{parseCidr("10.0.0.0/24"), parseCidr("10.0.1.0/24")},
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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// cidrs ok
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{
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"invalid cidr: hard",
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`kubernetes coredns.local {
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cidrs hard dry
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}`,
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true,
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"invalid cidr: hard",
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-1,
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0,
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defaultResyncPeriod,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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// fallthrough invalid
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{
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"Extra params for fallthrough",
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`kubernetes coredns.local {
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fallthrough junk
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}`,
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true,
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"rong argument count",
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-1,
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0,
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defaultResyncPeriod,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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// Valid upstream
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{
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"valid upstream",
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`kubernetes coredns.local {
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upstream 13.14.15.16:53
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}`,
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false,
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"",
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1,
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0,
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defaultResyncPeriod,
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"",
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defaultPodMode,
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nil,
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false,
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[]string{"13.14.15.16:53"},
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[]Federation{},
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AutoPath{},
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},
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// Invalid upstream
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{
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"valid upstream",
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`kubernetes coredns.local {
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upstream 13.14.15.16orange
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}`,
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true,
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"not an IP address or file: \"13.14.15.16orange\"",
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-1,
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0,
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defaultResyncPeriod,
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{},
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AutoPath{},
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},
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// Valid federations
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{
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"valid upstream",
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`kubernetes coredns.local {
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federation foo bar.crawl.com
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federation fed era.tion.com
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}`,
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false,
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"",
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1,
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0,
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defaultResyncPeriod,
|
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"",
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defaultPodMode,
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nil,
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false,
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nil,
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[]Federation{
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{name: "foo", zone: "bar.crawl.com"},
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{name: "fed", zone: "era.tion.com"},
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},
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AutoPath{},
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},
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// Invalid federations
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{
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"valid upstream",
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`kubernetes coredns.local {
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federation starship
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}`,
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true,
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`incorrect number of arguments for federation`,
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-1,
|
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0,
|
|
defaultResyncPeriod,
|
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"",
|
|
defaultPodMode,
|
|
nil,
|
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false,
|
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nil,
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[]Federation{},
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AutoPath{},
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},
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// autopath
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{
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"valid autopath",
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`kubernetes coredns.local {
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autopath 1 NXDOMAIN ` + autoPathResolvConfFile + `
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}`,
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|
false,
|
|
"",
|
|
1,
|
|
0,
|
|
defaultResyncPeriod,
|
|
"",
|
|
defaultPodMode,
|
|
nil,
|
|
false,
|
|
nil,
|
|
nil,
|
|
AutoPath{
|
|
Enabled: true,
|
|
NDots: 1,
|
|
HostSearchPath: []string{"bar.com.", "baz.com."},
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|
ResolvConfFile: autoPathResolvConfFile,
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|
OnNXDOMAIN: dns.RcodeNameError,
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},
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},
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|
{
|
|
"invalid autopath RESPONSE",
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`kubernetes coredns.local {
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autopath 0 CRY
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|
}`,
|
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true,
|
|
"invalid RESPONSE argument for autopath",
|
|
-1,
|
|
0,
|
|
defaultResyncPeriod,
|
|
"",
|
|
defaultPodMode,
|
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nil,
|
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false,
|
|
nil,
|
|
nil,
|
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AutoPath{},
|
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},
|
|
{
|
|
"invalid autopath NDOTS",
|
|
`kubernetes coredns.local {
|
|
autopath polka
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|
}`,
|
|
true,
|
|
"invalid NDOTS argument for autopath",
|
|
-1,
|
|
0,
|
|
defaultResyncPeriod,
|
|
"",
|
|
defaultPodMode,
|
|
nil,
|
|
false,
|
|
nil,
|
|
nil,
|
|
AutoPath{},
|
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},
|
|
{
|
|
"invalid autopath RESOLV-CONF",
|
|
`kubernetes coredns.local {
|
|
autopath 1 NOERROR /wrong/path/to/resolv.conf
|
|
}`,
|
|
true,
|
|
"error when parsing",
|
|
-1,
|
|
0,
|
|
defaultResyncPeriod,
|
|
"",
|
|
defaultPodMode,
|
|
nil,
|
|
false,
|
|
nil,
|
|
nil,
|
|
AutoPath{},
|
|
},
|
|
{
|
|
"invalid autopath invalid option",
|
|
`kubernetes coredns.local {
|
|
autopath 1 SERVFAIL ` + autoPathResolvConfFile + ` foo
|
|
}`,
|
|
true,
|
|
"incorrect number of arguments",
|
|
-1,
|
|
0,
|
|
defaultResyncPeriod,
|
|
"",
|
|
defaultPodMode,
|
|
nil,
|
|
false,
|
|
nil,
|
|
nil,
|
|
AutoPath{},
|
|
},
|
|
}
|
|
|
|
for i, test := range tests {
|
|
c := caddy.NewTestController("dns", test.input)
|
|
k8sController, err := kubernetesParse(c)
|
|
|
|
if test.shouldErr && err == nil {
|
|
t.Errorf("Test %d: Expected error, but did not find error for input '%s'. Error was: '%v'", i, test.input, err)
|
|
}
|
|
|
|
if err != nil {
|
|
if !test.shouldErr {
|
|
t.Errorf("Test %d: Expected no error but found one for input %s. Error was: %v", i, test.input, err)
|
|
continue
|
|
}
|
|
|
|
if test.shouldErr && (len(test.expectedErrContent) < 1) {
|
|
t.Fatalf("Test %d: Test marked as expecting an error, but no expectedErrContent provided for input '%s'. Error was: '%v'", i, test.input, err)
|
|
}
|
|
|
|
if test.shouldErr && (test.expectedZoneCount >= 0) {
|
|
t.Errorf("Test %d: Test marked as expecting an error, but provides value for expectedZoneCount!=-1 for input '%s'. Error was: '%v'", i, test.input, err)
|
|
}
|
|
|
|
if !strings.Contains(err.Error(), test.expectedErrContent) {
|
|
t.Errorf("Test %d: Expected error to contain: %v, found error: %v, input: %s", i, test.expectedErrContent, err, test.input)
|
|
}
|
|
continue
|
|
}
|
|
|
|
// No error was raised, so validate initialization of k8sController
|
|
// Zones
|
|
foundZoneCount := len(k8sController.Zones)
|
|
if foundZoneCount != test.expectedZoneCount {
|
|
t.Errorf("Test %d: Expected kubernetes controller to be initialized with %d zones, instead found %d zones: '%v' for input '%s'", i, test.expectedZoneCount, foundZoneCount, k8sController.Zones, test.input)
|
|
}
|
|
|
|
// Namespaces
|
|
foundNSCount := len(k8sController.Namespaces)
|
|
if foundNSCount != test.expectedNSCount {
|
|
t.Errorf("Test %d: Expected kubernetes controller to be initialized with %d namespaces. Instead found %d namespaces: '%v' for input '%s'", i, test.expectedNSCount, foundNSCount, k8sController.Namespaces, test.input)
|
|
}
|
|
|
|
// ResyncPeriod
|
|
foundResyncPeriod := k8sController.ResyncPeriod
|
|
if foundResyncPeriod != test.expectedResyncPeriod {
|
|
t.Errorf("Test %d: Expected kubernetes controller to be initialized with resync period '%s'. Instead found period '%s' for input '%s'", i, test.expectedResyncPeriod, foundResyncPeriod, test.input)
|
|
}
|
|
|
|
// Labels
|
|
if k8sController.LabelSelector != nil {
|
|
foundLabelSelectorString := unversionedapi.FormatLabelSelector(k8sController.LabelSelector)
|
|
if foundLabelSelectorString != test.expectedLabelSelector {
|
|
t.Errorf("Test %d: Expected kubernetes controller to be initialized with label selector '%s'. Instead found selector '%s' for input '%s'", i, test.expectedLabelSelector, foundLabelSelectorString, test.input)
|
|
}
|
|
}
|
|
// Pods
|
|
foundPodMode := k8sController.PodMode
|
|
if foundPodMode != test.expectedPodMode {
|
|
t.Errorf("Test %d: Expected kubernetes controller to be initialized with pod mode '%s'. Instead found pod mode '%s' for input '%s'", i, test.expectedPodMode, foundPodMode, test.input)
|
|
}
|
|
|
|
// Cidrs
|
|
foundCidrs := k8sController.ReverseCidrs
|
|
if len(foundCidrs) != len(test.expectedCidrs) {
|
|
t.Errorf("Test %d: Expected kubernetes controller to be initialized with %d cidrs. Instead found %d cidrs for input '%s'", i, len(test.expectedCidrs), len(foundCidrs), test.input)
|
|
}
|
|
for j, cidr := range test.expectedCidrs {
|
|
if cidr.String() != foundCidrs[j].String() {
|
|
t.Errorf("Test %d: Expected kubernetes controller to be initialized with cidr '%s'. Instead found cidr '%s' for input '%s'", i, test.expectedCidrs[j].String(), foundCidrs[j].String(), test.input)
|
|
}
|
|
}
|
|
// fallthrough
|
|
foundFallthrough := k8sController.Fallthrough
|
|
if foundFallthrough != test.expectedFallthrough {
|
|
t.Errorf("Test %d: Expected kubernetes controller to be initialized with fallthrough '%v'. Instead found fallthrough '%v' for input '%s'", i, test.expectedFallthrough, foundFallthrough, test.input)
|
|
}
|
|
// upstream
|
|
foundUpstreams := k8sController.Proxy.Upstreams
|
|
if test.expectedUpstreams == nil {
|
|
if foundUpstreams != nil {
|
|
t.Errorf("Test %d: Expected kubernetes controller to not be initialized with upstreams for input '%s'", i, test.input)
|
|
}
|
|
} else {
|
|
if foundUpstreams == nil {
|
|
t.Errorf("Test %d: Expected kubernetes controller to be initialized with upstreams for input '%s'", i, test.input)
|
|
} else {
|
|
if len(*foundUpstreams) != len(test.expectedUpstreams) {
|
|
t.Errorf("Test %d: Expected kubernetes controller to be initialized with %d upstreams. Instead found %d upstreams for input '%s'", i, len(test.expectedUpstreams), len(*foundUpstreams), test.input)
|
|
}
|
|
for j, want := range test.expectedUpstreams {
|
|
got := (*foundUpstreams)[j].Select().Name
|
|
if got != want {
|
|
t.Errorf("Test %d: Expected kubernetes controller to be initialized with upstream '%s'. Instead found upstream '%s' for input '%s'", i, want, got, test.input)
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
// autopath
|
|
if !reflect.DeepEqual(test.expectedAutoPath, k8sController.AutoPath) {
|
|
t.Errorf("Test %d: Expected kubernetes controller to be initialized with autopath '%v'. Instead found autopath '%v' for input '%s'", i, test.expectedAutoPath, k8sController.AutoPath, test.input)
|
|
}
|
|
}
|
|
}
|
|
|
|
const testResolveConf = `nameserver 1.2.3.4
|
|
domain foo.com
|
|
search bar.com baz.com
|
|
options ndots:5
|
|
`
|