mirror of
https://github.com/coredns/coredns.git
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5c71bd0b87
* kubernetes: add multicluster support Add multicluster support via Multi-Cluster Services API (MCS-API) via a new option `multiclusterZones` in the kubernetes plugin. When some multicluster zones are passed to the kubernetes plugin, it will start watching the ServiceImport objects and its associated EndpointSlices. Signed-off-by: Arthur Outhenin-Chalandre <arthur@cri.epita.fr> * kubernetes: implement xfr support for multicluster zones Signed-off-by: Arthur Outhenin-Chalandre <arthur@cri.epita.fr> --------- Signed-off-by: Arthur Outhenin-Chalandre <arthur@cri.epita.fr>
685 lines
15 KiB
Go
685 lines
15 KiB
Go
package kubernetes
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import (
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"slices"
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"strings"
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"testing"
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"github.com/coredns/caddy"
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"github.com/coredns/coredns/plugin/pkg/fall"
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meta "k8s.io/apimachinery/pkg/apis/meta/v1"
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)
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func TestKubernetesParse(t *testing.T) {
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tests := []struct {
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input string // Corefile data as string
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shouldErr bool // true if test case is expected 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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expectedLabelSelector string // expected label selector value
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expectedNamespaceLabelSelector string // expected namespace label selector value
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expectedPodMode string
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expectedFallthrough fall.F
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}{
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// positive
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{
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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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"",
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"",
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podModeDisabled,
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fall.Zero,
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},
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{
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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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"",
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"",
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podModeDisabled,
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fall.Zero,
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},
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{
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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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"",
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"",
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podModeDisabled,
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fall.Zero,
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},
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{
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`kubernetes coredns.local {
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endpoint http://localhost:9090 http://localhost:9091
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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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"",
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"",
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podModeDisabled,
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fall.Zero,
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},
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{
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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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"",
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"",
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podModeDisabled,
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fall.Zero,
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},
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{
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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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"",
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"",
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podModeDisabled,
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fall.Zero,
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},
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{
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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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"environment=prod",
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"",
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podModeDisabled,
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fall.Zero,
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},
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{
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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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"application=nginx,environment in (production,qa,staging)",
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"",
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podModeDisabled,
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fall.Zero,
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},
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{
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`kubernetes coredns.local {
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namespace_labels istio-injection=enabled
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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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"",
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"istio-injection=enabled",
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podModeDisabled,
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fall.Zero,
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},
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{
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`kubernetes coredns.local {
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namespaces foo bar
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namespace_labels istio-injection=enabled
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}`,
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true,
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"Error during parsing: namespaces and namespace_labels cannot both be set",
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-1,
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0,
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"",
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"istio-injection=enabled",
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podModeDisabled,
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fall.Zero,
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},
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{
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`kubernetes coredns.local test.local {
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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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"application=nginx,environment in (production,qa,staging)",
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"",
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podModeDisabled,
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fall.Root,
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},
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// negative
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{
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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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"",
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"",
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podModeDisabled,
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fall.Zero,
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},
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{
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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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"",
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"",
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podModeDisabled,
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fall.Zero,
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},
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{
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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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"",
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"",
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podModeDisabled,
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fall.Zero,
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},
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{
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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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"",
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"",
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podModeDisabled,
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fall.Zero,
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},
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// pods disabled
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{
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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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"",
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"",
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podModeDisabled,
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fall.Zero,
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},
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// pods insecure
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{
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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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"",
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"",
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podModeInsecure,
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fall.Zero,
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},
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// pods verified
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{
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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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"",
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"",
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podModeVerified,
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fall.Zero,
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},
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// pods invalid
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{
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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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"",
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"",
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podModeVerified,
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fall.Zero,
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},
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// fallthrough with zones
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{
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`kubernetes coredns.local {
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fallthrough ip6.arpa inaddr.arpa foo.com
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}`,
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false,
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"rong argument count",
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1,
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0,
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"",
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"",
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podModeDisabled,
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fall.F{Zones: []string{"ip6.arpa.", "inaddr.arpa.", "foo.com."}},
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},
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// More than one Kubernetes not allowed
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{
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`kubernetes coredns.local
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kubernetes cluster.local`,
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true,
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"this plugin",
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-1,
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0,
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"",
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"",
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podModeDisabled,
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fall.Zero,
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},
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{
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`kubernetes coredns.local {
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kubeconfig
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}`,
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true,
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"Wrong argument count or unexpected line ending after",
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-1,
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0,
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"",
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"",
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podModeDisabled,
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fall.Zero,
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},
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{
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`kubernetes coredns.local {
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kubeconfig file context extraarg
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}`,
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true,
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"Wrong argument count or unexpected line ending after",
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-1,
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0,
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"",
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"",
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podModeDisabled,
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fall.Zero,
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},
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{
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`kubernetes coredns.local {
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kubeconfig file
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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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"",
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"",
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podModeDisabled,
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fall.Zero,
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},
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{
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`kubernetes coredns.local {
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kubeconfig file context
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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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"",
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"",
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podModeDisabled,
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fall.Zero,
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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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// Labels
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if k8sController.opts.labelSelector != nil {
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foundLabelSelectorString := meta.FormatLabelSelector(k8sController.opts.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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// fallthrough
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if !k8sController.Fall.Equal(test.expectedFallthrough) {
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t.Errorf("Test %d: Expected kubernetes controller to be initialized with fallthrough '%v'. Instead found fallthrough '%v' for input '%s'", i, test.expectedFallthrough, k8sController.Fall, test.input)
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}
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}
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}
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func TestKubernetesParseEndpointPodNames(t *testing.T) {
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tests := []struct {
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input string // Corefile data as string
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shouldErr bool // true if test case is expected to produce an error.
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expectedErrContent string // substring from the expected error. Empty for positive cases.
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expectedEndpointMode bool
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}{
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// valid endpoints mode
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{
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`kubernetes coredns.local {
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endpoint_pod_names
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}`,
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false,
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"",
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true,
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},
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// endpoints invalid
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{
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`kubernetes coredns.local {
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endpoint_pod_names giant_seed
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}`,
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true,
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"rong argument count or unexpected",
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false,
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},
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// endpoint not set
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{
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`kubernetes coredns.local {
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}`,
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false,
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"",
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false,
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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 !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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// Endpoints
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foundEndpointNameMode := k8sController.endpointNameMode
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if foundEndpointNameMode != test.expectedEndpointMode {
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t.Errorf("Test %d: Expected kubernetes controller to be initialized with endpoints mode '%v'. Instead found endpoints mode '%v' for input '%s'", i, test.expectedEndpointMode, foundEndpointNameMode, test.input)
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}
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}
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}
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func TestKubernetesParseNoEndpoints(t *testing.T) {
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tests := []struct {
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input string // Corefile data as string
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shouldErr bool // true if test case is expected to produce an error.
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expectedErrContent string // substring from the expected error. Empty for positive cases.
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expectedEndpointsInit bool
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}{
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// valid
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{
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`kubernetes coredns.local {
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noendpoints
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}`,
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false,
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"",
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false,
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},
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// invalid
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{
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`kubernetes coredns.local {
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noendpoints ixnay on the endpointsay
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}`,
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true,
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"rong argument count or unexpected",
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true,
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},
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// not set
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{
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`kubernetes coredns.local {
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}`,
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false,
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"",
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true,
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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 !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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foundEndpointsInit := k8sController.opts.initEndpointsCache
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if foundEndpointsInit != test.expectedEndpointsInit {
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t.Errorf("Test %d: Expected kubernetes controller to be initialized with endpoints watch '%v'. Instead found endpoints watch '%v' for input '%s'", i, test.expectedEndpointsInit, foundEndpointsInit, test.input)
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}
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}
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}
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func TestKubernetesParseIgnoreEmptyService(t *testing.T) {
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tests := []struct {
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input string // Corefile data as string
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shouldErr bool // true if test case is expected to produce an error.
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expectedErrContent string // substring from the expected error. Empty for positive cases.
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|
expectedEndpointsInit bool
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}{
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// valid
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{
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`kubernetes coredns.local {
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ignore empty_service
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}`,
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false,
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"",
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true,
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},
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// invalid
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{
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`kubernetes coredns.local {
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ignore ixnay on the endpointsay
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}`,
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true,
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"unable to parse ignore value",
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false,
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},
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{
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`kubernetes coredns.local {
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ignore empty_service ixnay on the endpointsay
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}`,
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false,
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"",
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true,
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},
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// not set
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{
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`kubernetes coredns.local {
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}`,
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false,
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"",
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false,
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},
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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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|
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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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|
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if err != nil {
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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 !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
|
|
}
|
|
|
|
foundIgnoreEmptyService := k8sController.opts.ignoreEmptyService
|
|
if foundIgnoreEmptyService != test.expectedEndpointsInit {
|
|
t.Errorf("Test %d: Expected kubernetes controller to be initialized with ignore empty_service '%v'. Instead found ignore empty_service watch '%v' for input '%s'", i, test.expectedEndpointsInit, foundIgnoreEmptyService, test.input)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestKubernetesParseMulticluster(t *testing.T) {
|
|
tests := []struct {
|
|
input string // Corefile data as string
|
|
shouldErr bool // true if test case is expected to produce an error.
|
|
expectedErrContent string // substring from the expected error. Empty for positive cases.
|
|
expectedMulticlusterZones []string
|
|
}{
|
|
// valid
|
|
{
|
|
`kubernetes coredns.local clusterset.local {
|
|
multicluster clusterset.local
|
|
}`,
|
|
false,
|
|
"",
|
|
[]string{"clusterset.local."},
|
|
},
|
|
// invalid
|
|
{
|
|
`kubernetes coredns.local {
|
|
multicluster clusterset.local
|
|
}`,
|
|
true,
|
|
"Error during parsing: is not authoritative for the multicluster zone clusterset.local.",
|
|
[]string{"clusterset.local."},
|
|
},
|
|
{
|
|
`kubernetes coredns.local clusterset.local {
|
|
multicluster clusterset.local test.local
|
|
}`,
|
|
true,
|
|
"Error during parsing: is not authoritative for the multicluster zone test.local.",
|
|
[]string{"clusterset.local.", "test.local."},
|
|
},
|
|
// not set
|
|
{
|
|
`kubernetes coredns.local {
|
|
multicluster
|
|
}`,
|
|
false,
|
|
"",
|
|
[]string{},
|
|
},
|
|
}
|
|
|
|
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 !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
|
|
}
|
|
|
|
foundMulticlusterZones := k8sController.opts.multiclusterZones
|
|
if !slices.Equal(foundMulticlusterZones, test.expectedMulticlusterZones) {
|
|
t.Errorf("Test %d: Expected kubernetes controller to be initialized with multicluster '%v'. Instead found multicluster '%v' for input '%s'", i, test.expectedMulticlusterZones, foundMulticlusterZones, test.input)
|
|
}
|
|
}
|
|
}
|