mirror of
https://github.com/coredns/coredns.git
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77f957d443
* add cidrs opt * remove state data from middleware object * update k8s docs * Add integration tests * add unit tests for cidr and pods config * more README fixes, separate dev notes * adjust section headers * fix typo
472 lines
10 KiB
Go
472 lines
10 KiB
Go
package kubernetes
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import (
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"net"
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"strings"
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"testing"
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"time"
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"github.com/mholt/caddy"
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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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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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}{
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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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},
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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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},
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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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},
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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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},
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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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},
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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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},
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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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},
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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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},
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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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},
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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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},
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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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}`,
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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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},
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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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},
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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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},
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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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"Wrong argument count or unexpected line ending after 'endpoint'",
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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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},
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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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"Parse error: Wrong argument count or unexpected line ending after 'namespaces'",
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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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},
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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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"Wrong argument count or unexpected line ending after 'resyncperiod'",
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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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},
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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. Value provided was ",
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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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},
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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. Value provided was ",
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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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},
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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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"Wrong argument count or unexpected line ending after 'labels'",
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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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},
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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. Value provided was",
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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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},
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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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},
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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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},
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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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},
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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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"Value for pods must be one of: disabled, verified, insecure",
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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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},
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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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},
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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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},
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}
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for i, test := range tests {
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c := caddy.NewTestController("dns", test.input)
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k8sController, err := kubernetesParse(c)
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if test.shouldErr && err == nil {
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t.Errorf("Test %d: Expected error, but did not find error for input '%s'. Error was: '%v'", i, test.input, err)
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}
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if err != nil {
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if !test.shouldErr {
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t.Errorf("Test %d: Expected no error but found one for input %s. Error was: %v", i, test.input, err)
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continue
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}
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if test.shouldErr && (len(test.expectedErrContent) < 1) {
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t.Fatalf("Test %d: Test marked as expecting an error, but no expectedErrContent provided for input '%s'. Error was: '%v'", i, test.input, err)
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}
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if test.shouldErr && (test.expectedZoneCount >= 0) {
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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)
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}
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if !strings.Contains(err.Error(), test.expectedErrContent) {
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t.Errorf("Test %d: Expected error to contain: %v, found error: %v, input: %s", i, test.expectedErrContent, err, test.input)
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}
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continue
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}
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// No error was raised, so validate initialization of k8sController
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// Zones
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foundZoneCount := len(k8sController.Zones)
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if foundZoneCount != test.expectedZoneCount {
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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)
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}
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// Namespaces
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foundNSCount := len(k8sController.Namespaces)
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if foundNSCount != test.expectedNSCount {
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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)
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}
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// ResyncPeriod
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foundResyncPeriod := k8sController.ResyncPeriod
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if foundResyncPeriod != test.expectedResyncPeriod {
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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)
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}
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// Labels
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if k8sController.LabelSelector != nil {
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foundLabelSelectorString := unversionedapi.FormatLabelSelector(k8sController.LabelSelector)
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if foundLabelSelectorString != test.expectedLabelSelector {
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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)
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}
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}
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// Pods
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foundPodMode := k8sController.PodMode
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if foundPodMode != test.expectedPodMode {
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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)
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}
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// Cidrs
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foundCidrs := k8sController.ReverseCidrs
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if len(foundCidrs) != len(test.expectedCidrs) {
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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)
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}
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for j, cidr := range test.expectedCidrs {
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if cidr.String() != foundCidrs[j].String() {
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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)
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}
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}
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}
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}
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