Adding resyncperiod to Corefile (#205)
* Removing old unused inline k8s API code and tests. * Adding parsing implementation for `resyncperiod` keyword from Corefile. * Adding tests for parsing `resyncperiod` keyword from Corefile. 8 Updating README.md and conf/k8sCorefile.
This commit is contained in:
Michael Richmond
GitHub
parent
51eaefc037
commit
c079de65b5
9 changed files with 123 additions and 965 deletions
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@ -2,6 +2,9 @@
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.:53 {
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# use kubernetes middleware for domain "coredns.local"
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kubernetes coredns.local {
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# Kubernetes data API resync period
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# Example values: 60s, 5m, 1h
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resyncperiod 5m
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# Use url for k8s API endpoint
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endpoint http://localhost:8080
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# Assemble k8s record names with the template
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@ -11,7 +14,5 @@
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}
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# Perform DNS response caching for the coredns.local zone
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# Cache timeout is provided by the integer in seconds
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# This works for the kubernetes middleware.)
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#cache 20 coredns.local
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#cache 160 coredns.local
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#cache 180 coredns.local
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}
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@ -2,6 +2,7 @@ package setup
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import (
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"errors"
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"fmt"
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"log"
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"strings"
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"time"
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@ -27,7 +28,6 @@ func Kubernetes(c *Controller) (middleware.Middleware, error) {
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if err != nil {
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return nil, err
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}
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log.Printf("[debug] after parse and start KubeCache, APIconn is: %v", kubernetes.APIConn)
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return func(next middleware.Handler) middleware.Handler {
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kubernetes.Next = next
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@ -51,7 +51,6 @@ func kubernetesParse(c *Controller) (kubernetes.Kubernetes, error) {
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if c.Val() == "kubernetes" {
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zones := c.RemainingArgs()
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log.Printf("[debug] Zones: %v", zones)
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if len(zones) == 0 {
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k8s.Zones = c.ServerBlockHosts
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log.Printf("[debug] Zones(from ServerBlockHosts): %v", zones)
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@ -97,6 +96,19 @@ func kubernetesParse(c *Controller) (kubernetes.Kubernetes, error) {
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log.Printf("[debug] 'endpoint' keyword provided without any endpoint url value.")
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return kubernetes.Kubernetes{}, c.ArgErr()
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}
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case "resyncperiod":
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args := c.RemainingArgs()
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if len(args) != 0 {
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k8s.ResyncPeriod, err = time.ParseDuration(args[0])
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if err != nil {
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err = errors.New(fmt.Sprintf("Unable to parse resync duration value. Value provided was '%v'. Example valid values: '15s', '5m', '1h'. Error was: %v", args[0], err))
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log.Printf("[ERROR] %v", err)
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return kubernetes.Kubernetes{}, err
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}
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} else {
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log.Printf("[debug] 'resyncperiod' keyword provided without any duration value.")
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return kubernetes.Kubernetes{}, c.ArgErr()
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}
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}
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}
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return k8s, nil
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@ -3,17 +3,19 @@ package setup
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import (
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"strings"
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"testing"
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"time"
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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
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input string
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shouldErr bool
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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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expectedNTValid bool // NameTemplate to be initialized and valid
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expectedNSCount int // expected count of namespaces.
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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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expectedNTValid bool // NameTemplate to be initialized and valid
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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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}{
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// positive
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{
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@ -24,6 +26,7 @@ func TestKubernetesParse(t *testing.T) {
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1,
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true,
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0,
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defaultResyncPeriod,
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},
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{
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"kubernetes keyword with multiple zones",
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@ -33,6 +36,7 @@ func TestKubernetesParse(t *testing.T) {
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2,
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true,
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0,
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defaultResyncPeriod,
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},
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{
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"kubernetes keyword with zone and empty braces",
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@ -43,6 +47,7 @@ func TestKubernetesParse(t *testing.T) {
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1,
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true,
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0,
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defaultResyncPeriod,
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},
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{
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"endpoint keyword with url",
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@ -54,6 +59,7 @@ func TestKubernetesParse(t *testing.T) {
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1,
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true,
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0,
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defaultResyncPeriod,
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},
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{
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"template keyword with valid template",
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@ -65,6 +71,7 @@ func TestKubernetesParse(t *testing.T) {
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1,
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true,
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0,
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defaultResyncPeriod,
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},
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{
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"namespaces keyword with one namespace",
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@ -76,6 +83,7 @@ func TestKubernetesParse(t *testing.T) {
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1,
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true,
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1,
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defaultResyncPeriod,
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},
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{
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"namespaces keyword with multiple namespaces",
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@ -87,10 +95,36 @@ func TestKubernetesParse(t *testing.T) {
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1,
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true,
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2,
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defaultResyncPeriod,
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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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true,
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0,
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30 * time.Second,
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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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true,
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0,
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15 * time.Minute,
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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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template {service}.{namespace}.{zone}
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namespaces demo test
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@ -100,6 +134,7 @@ func TestKubernetesParse(t *testing.T) {
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2,
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true,
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2,
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15 * time.Minute,
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},
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// negative
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{
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@ -110,6 +145,7 @@ func TestKubernetesParse(t *testing.T) {
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-1,
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false,
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-1,
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defaultResyncPeriod,
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},
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{
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"kubernetes keyword without a zone",
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@ -119,6 +155,7 @@ func TestKubernetesParse(t *testing.T) {
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-1,
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true,
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0,
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defaultResyncPeriod,
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},
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{
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"endpoint keyword without an endpoint value",
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@ -130,6 +167,7 @@ func TestKubernetesParse(t *testing.T) {
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-1,
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true,
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-1,
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defaultResyncPeriod,
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},
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{
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"template keyword without a template value",
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@ -141,6 +179,7 @@ func TestKubernetesParse(t *testing.T) {
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-1,
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false,
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0,
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defaultResyncPeriod,
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},
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{
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"template keyword with an invalid template value",
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@ -152,6 +191,7 @@ func TestKubernetesParse(t *testing.T) {
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-1,
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false,
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0,
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defaultResyncPeriod,
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},
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{
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"namespace keyword without a namespace value",
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@ -163,6 +203,43 @@ func TestKubernetesParse(t *testing.T) {
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-1,
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true,
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-1,
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defaultResyncPeriod,
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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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true,
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0,
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0 * time.Minute,
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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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true,
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0,
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0 * time.Second,
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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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true,
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0,
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0 * time.Second,
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},
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}
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@ -218,8 +295,12 @@ func TestKubernetesParse(t *testing.T) {
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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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t.Logf("k8sController is: %v", k8sController)
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t.Logf("k8sController.Namespaces is: %v", k8sController.Namespaces)
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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'", test.expectedResyncPeriod, foundResyncPeriod, test.input)
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}
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}
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}
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@ -35,6 +35,9 @@ This is the default kubernetes setup, with everything specified in full:
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.:53 {
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# use kubernetes middleware for domain "coredns.local"
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kubernetes coredns.local {
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# Kubernetes data API resync period
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# Example values: 60s, 5m, 1h
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resyncperiod 5m
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# Use url for k8s API endpoint
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endpoint http://localhost:8080
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# Assemble k8s record names with the template
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@ -42,10 +45,17 @@ This is the default kubernetes setup, with everything specified in full:
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# Only expose the k8s namespace "demo"
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namespaces demo
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}
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# cache 160 coredns.local
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# Perform DNS response caching for the coredns.local zone
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# Cache timeout is provided by the integer in seconds
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#cache 180 coredns.local
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}
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~~~
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Notes:
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* If the `namespaces` keyword is omitted, all kubernetes namespaces are exposed.
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* If the `template` keyword is omitted, the default template of "{service}.{namespace}.{zone}" is used.
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* If the `resyncperiod` keyword is omitted, the default resync period is 5 minutes.
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### Basic Setup
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#### Launch Kubernetes
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@ -305,14 +315,9 @@ TBD:
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* Performance
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* Improve lookup to reduce size of query result obtained from k8s API.
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(namespace-based?, other ideas?)
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* Caching/notification of k8s API dataset. (See aledbf fork for
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implementation ideas.)
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* DNS response caching is good, but we should also cache at the http query
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level as well. (Take a look at https://github.com/patrickmn/go-cache as
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a potential expiring cache implementation for the http API queries.)
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* Additional features:
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* Reverse IN-ADDR entries for services. (Is there any value in supporting
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reverse lookup records?)
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reverse lookup records?) (need tests, functionality should work based on @aledbf's code.)
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* How to support label specification in Corefile to allow use of labels to
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indicate zone? (Is this even useful?) For example, the following
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configuration exposes all services labeled for the "staging" environment
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@ -333,14 +338,6 @@ TBD:
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flattening to lower case and mapping of non-DNS characters to DNS characters
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in a standard way.)
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* Expose arbitrary kubernetes repository data as TXT records?
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* (done) ~~Support custom user-provided templates for k8s names. A string provided
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in the middleware configuration like `{service}.{namespace}.{type}` defines
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the template of how to construct record names for the zone. This example
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would produce `myservice.mynamespace.svc.cluster.local`. (Basic template
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implemented. Need to slice zone out of current template implementation.)~~
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* (done) ~~Implement namespace filtering to different zones. That is, zone "a.b"
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publishes services from namespace "foo", and zone "x.y" publishes services
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from namespaces "bar" and "baz". (Basic version implemented -- need test cases.)~~
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* DNS Correctness
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* Do we need to generate synthetic zone records for namespaces?
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* Do we need to generate synthetic zone records for the skydns synthetic zones?
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@ -352,7 +349,3 @@ TBD:
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pre-loaded k8s API cache. With and without CoreDNS response caching.
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* Try to get rid of kubernetes launch scripts by moving operations into
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.travis.yml file.
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* ~~Implement test cases for http data parsing using dependency injection
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for http get operations.~~
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* ~~Automate integration testing with kubernetes. (k8s launch and service
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start-up automation is in middleware/kubernetes/tests)~~
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@ -129,7 +129,7 @@ func (dns *dnsController) Stop() error {
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// Run starts the controller.
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func (dns *dnsController) Run() {
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log.Println("[debug] starting coredns controller")
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log.Println("[debug] Starting k8s notification controllers")
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go dns.endpController.Run(dns.stopCh)
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go dns.svcController.Run(dns.stopCh)
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@ -1,113 +0,0 @@
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package k8sclient
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import (
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"encoding/json"
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"net/http"
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)
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// getK8sAPIResponse wraps the http.Get(url) function to provide dependency
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// injection for unit testing.
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var getK8sAPIResponse = func(url string) (resp *http.Response, err error) {
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resp, err = http.Get(url)
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return resp, err
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}
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func parseJson(url string, target interface{}) error {
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r, err := getK8sAPIResponse(url)
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if err != nil {
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return err
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}
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defer r.Body.Close()
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return json.NewDecoder(r.Body).Decode(target)
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}
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// Kubernetes Resource List
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type ResourceList struct {
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Kind string `json:"kind"`
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GroupVersion string `json:"groupVersion"`
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Resources []resource `json:"resources"`
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}
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type resource struct {
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Name string `json:"name"`
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Namespaced bool `json:"namespaced"`
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Kind string `json:"kind"`
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}
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// Kubernetes NamespaceList
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type NamespaceList struct {
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Kind string `json:"kind"`
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APIVersion string `json:"apiVersion"`
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Metadata apiListMetadata `json:"metadata"`
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Items []nsItems `json:"items"`
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}
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type apiListMetadata struct {
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SelfLink string `json:"selfLink"`
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ResourceVersion string `json:"resourceVersion"`
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}
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type nsItems struct {
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Metadata nsMetadata `json:"metadata"`
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Spec nsSpec `json:"spec"`
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Status nsStatus `json:"status"`
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}
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type nsMetadata struct {
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Name string `json:"name"`
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SelfLink string `json:"selfLink"`
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Uid string `json:"uid"`
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ResourceVersion string `json:"resourceVersion"`
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CreationTimestamp string `json:"creationTimestamp"`
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}
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type nsSpec struct {
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Finalizers []string `json:"finalizers"`
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}
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type nsStatus struct {
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Phase string `json:"phase"`
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}
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// Kubernetes ServiceList
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type ServiceList struct {
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Kind string `json:"kind"`
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APIVersion string `json:"apiVersion"`
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Metadata apiListMetadata `json:"metadata"`
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Items []ServiceItem `json:"items"`
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}
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type ServiceItem struct {
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Metadata serviceMetadata `json:"metadata"`
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Spec serviceSpec `json:"spec"`
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// Status serviceStatus `json:"status"`
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}
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type serviceMetadata struct {
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Name string `json:"name"`
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Namespace string `json:"namespace"`
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SelfLink string `json:"selfLink"`
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Uid string `json:"uid"`
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ResourceVersion string `json:"resourceVersion"`
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CreationTimestamp string `json:"creationTimestamp"`
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// labels
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}
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type serviceSpec struct {
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Ports []servicePort `json:"ports"`
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ClusterIP string `json:"clusterIP"`
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Type string `json:"type"`
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SessionAffinity string `json:"sessionAffinity"`
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}
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type servicePort struct {
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Name string `json:"name"`
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Protocol string `json:"protocol"`
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Port int `json:"port"`
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TargetPort int `json:"targetPort"`
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}
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type serviceStatus struct {
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LoadBalancer string `json:"loadBalancer"`
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}
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|
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@ -1,133 +0,0 @@
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package k8sclient
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import (
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"errors"
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"log"
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"net/url"
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"strings"
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)
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// API strings
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const (
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apiBase = "/api/v1"
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apiNamespaces = "/namespaces"
|
||||
apiServices = "/services"
|
||||
)
|
||||
|
||||
// Defaults
|
||||
const (
|
||||
defaultBaseURL = "http://localhost:8080"
|
||||
)
|
||||
|
||||
type K8sConnector struct {
|
||||
baseURL string
|
||||
}
|
||||
|
||||
func (c *K8sConnector) SetBaseURL(u string) error {
|
||||
url, error := url.Parse(u)
|
||||
|
||||
if error != nil {
|
||||
return error
|
||||
}
|
||||
|
||||
if !url.IsAbs() {
|
||||
return errors.New("k8sclient: Kubernetes endpoint url must be an absolute URL")
|
||||
}
|
||||
|
||||
c.baseURL = url.String()
|
||||
return nil
|
||||
}
|
||||
|
||||
func (c *K8sConnector) GetBaseURL() string {
|
||||
return c.baseURL
|
||||
}
|
||||
|
||||
// URL constructor separated from code to support dependency injection
|
||||
// for unit tests.
|
||||
var makeURL = func(parts []string) string {
|
||||
return strings.Join(parts, "")
|
||||
}
|
||||
|
||||
func (c *K8sConnector) GetResourceList() (*ResourceList, error) {
|
||||
resources := new(ResourceList)
|
||||
|
||||
url := makeURL([]string{c.baseURL, apiBase})
|
||||
err := parseJson(url, resources)
|
||||
// TODO: handle no response from k8s
|
||||
if err != nil {
|
||||
log.Printf("[ERROR] Response from kubernetes API for GetResourceList() is: %v\n", err)
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return resources, nil
|
||||
}
|
||||
|
||||
func (c *K8sConnector) GetNamespaceList() (*NamespaceList, error) {
|
||||
namespaces := new(NamespaceList)
|
||||
|
||||
url := makeURL([]string{c.baseURL, apiBase, apiNamespaces})
|
||||
err := parseJson(url, namespaces)
|
||||
if err != nil {
|
||||
log.Printf("[ERROR] Response from kubernetes API for GetNamespaceList() is: %v\n", err)
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return namespaces, nil
|
||||
}
|
||||
|
||||
func (c *K8sConnector) GetServiceList() (*ServiceList, error) {
|
||||
services := new(ServiceList)
|
||||
|
||||
url := makeURL([]string{c.baseURL, apiBase, apiServices})
|
||||
err := parseJson(url, services)
|
||||
// TODO: handle no response from k8s
|
||||
if err != nil {
|
||||
log.Printf("[ERROR] Response from kubernetes API for GetServiceList() is: %v\n", err)
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return services, nil
|
||||
}
|
||||
|
||||
// GetServicesByNamespace returns a map of
|
||||
// namespacename :: [ kubernetesServiceItem ]
|
||||
func (c *K8sConnector) GetServicesByNamespace() (map[string][]ServiceItem, error) {
|
||||
|
||||
items := make(map[string][]ServiceItem)
|
||||
|
||||
k8sServiceList, err := c.GetServiceList()
|
||||
|
||||
if err != nil {
|
||||
log.Printf("[ERROR] Getting service list produced error: %v", err)
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// TODO: handle no response from k8s
|
||||
if k8sServiceList == nil {
|
||||
return nil, nil
|
||||
}
|
||||
|
||||
k8sItemList := k8sServiceList.Items
|
||||
|
||||
for _, i := range k8sItemList {
|
||||
namespace := i.Metadata.Namespace
|
||||
items[namespace] = append(items[namespace], i)
|
||||
}
|
||||
|
||||
return items, nil
|
||||
}
|
||||
|
||||
func NewK8sConnector(baseURL string) *K8sConnector {
|
||||
k := new(K8sConnector)
|
||||
|
||||
if baseURL == "" {
|
||||
baseURL = defaultBaseURL
|
||||
}
|
||||
|
||||
err := k.SetBaseURL(baseURL)
|
||||
if err != nil {
|
||||
return nil
|
||||
}
|
||||
|
||||
return k
|
||||
}
|
||||
|
|
@ -1,680 +0,0 @@
|
|||
package k8sclient
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"net/http"
|
||||
"net/http/httptest"
|
||||
"testing"
|
||||
)
|
||||
|
||||
var validURLs = []string{
|
||||
"http://www.github.com",
|
||||
"http://www.github.com:8080",
|
||||
"http://8.8.8.8",
|
||||
"http://8.8.8.8:9090",
|
||||
"www.github.com:8080",
|
||||
}
|
||||
|
||||
var invalidURLs = []string{
|
||||
"www.github.com",
|
||||
"8.8.8.8",
|
||||
"8.8.8.8:1010",
|
||||
"8.8`8.8",
|
||||
}
|
||||
|
||||
func TestNewK8sConnector(t *testing.T) {
|
||||
var conn *K8sConnector
|
||||
var url string
|
||||
|
||||
// Create with empty URL
|
||||
conn = nil
|
||||
url = ""
|
||||
|
||||
conn = NewK8sConnector("")
|
||||
if conn == nil {
|
||||
t.Errorf("Expected K8sConnector instance. Instead got '%v'", conn)
|
||||
}
|
||||
url = conn.GetBaseURL()
|
||||
if url != defaultBaseURL {
|
||||
t.Errorf("Expected K8sConnector instance to be initialized with defaultBaseURL. Instead got '%v'", url)
|
||||
}
|
||||
|
||||
// Create with valid URL
|
||||
for _, validURL := range validURLs {
|
||||
conn = nil
|
||||
url = ""
|
||||
|
||||
conn = NewK8sConnector(validURL)
|
||||
if conn == nil {
|
||||
t.Errorf("Expected K8sConnector instance. Instead got '%v'", conn)
|
||||
}
|
||||
url = conn.GetBaseURL()
|
||||
if url != validURL {
|
||||
t.Errorf("Expected K8sConnector instance to be initialized with supplied url '%v'. Instead got '%v'", validURL, url)
|
||||
}
|
||||
}
|
||||
|
||||
// Create with invalid URL
|
||||
for _, invalidURL := range invalidURLs {
|
||||
conn = nil
|
||||
url = ""
|
||||
|
||||
conn = NewK8sConnector(invalidURL)
|
||||
if conn != nil {
|
||||
t.Errorf("Expected to not get K8sConnector instance. Instead got '%v'", conn)
|
||||
continue
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestSetBaseURL(t *testing.T) {
|
||||
// SetBaseURL with valid URLs should work...
|
||||
for _, validURL := range validURLs {
|
||||
conn := NewK8sConnector(defaultBaseURL)
|
||||
err := conn.SetBaseURL(validURL)
|
||||
if err != nil {
|
||||
t.Errorf("Expected to receive nil, instead got error '%v'", err)
|
||||
continue
|
||||
}
|
||||
url := conn.GetBaseURL()
|
||||
if url != validURL {
|
||||
t.Errorf("Expected to connector url to be set to value '%v', instead set to '%v'", validURL, url)
|
||||
continue
|
||||
}
|
||||
}
|
||||
|
||||
// SetBaseURL with invalid or non absolute URLs should not change state...
|
||||
for _, invalidURL := range invalidURLs {
|
||||
conn := NewK8sConnector(defaultBaseURL)
|
||||
originalURL := conn.GetBaseURL()
|
||||
|
||||
err := conn.SetBaseURL(invalidURL)
|
||||
if err == nil {
|
||||
t.Errorf("Expected to receive an error value, instead got nil")
|
||||
}
|
||||
url := conn.GetBaseURL()
|
||||
if url != originalURL {
|
||||
t.Errorf("Expected base url to not change, instead it changed to '%v'", url)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestGetNamespaceList(t *testing.T) {
|
||||
// Set up a test http server
|
||||
testServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
fmt.Fprintln(w, namespaceListJsonData)
|
||||
}))
|
||||
defer testServer.Close()
|
||||
|
||||
// Overwrite URL constructor to access testServer
|
||||
makeURL = func(parts []string) string {
|
||||
return testServer.URL
|
||||
}
|
||||
|
||||
expectedNamespaces := []string{"default", "demo", "test"}
|
||||
apiConn := NewK8sConnector("")
|
||||
namespaceList, err := apiConn.GetNamespaceList()
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Expected no error from from GetNamespaceList(), instead got %v", err)
|
||||
}
|
||||
|
||||
if namespaceList == nil {
|
||||
t.Errorf("Expected data from GetNamespaceList(), instead got nil")
|
||||
}
|
||||
|
||||
kind := namespaceList.Kind
|
||||
if kind != "NamespaceList" {
|
||||
t.Errorf("Expected data from GetNamespaceList() to have Kind='NamespaceList', instead got Kind='%v'", kind)
|
||||
}
|
||||
|
||||
// Ensure correct number of namespaces found
|
||||
expectedCount := len(expectedNamespaces)
|
||||
namespaceCount := len(namespaceList.Items)
|
||||
if namespaceCount != expectedCount {
|
||||
t.Errorf("Expected '%v' namespaces from GetNamespaceList(), instead found '%v' namespaces", expectedCount, namespaceCount)
|
||||
}
|
||||
|
||||
// Check that all expectedNamespaces are found in the parsed data
|
||||
for _, ns := range expectedNamespaces {
|
||||
found := false
|
||||
for _, item := range namespaceList.Items {
|
||||
if item.Metadata.Name == ns {
|
||||
found = true
|
||||
break
|
||||
}
|
||||
}
|
||||
if !found {
|
||||
t.Errorf("Expected '%v' namespace is not in the parsed data from GetServicesByNamespace()", ns)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestGetServiceList(t *testing.T) {
|
||||
// Set up a test http server
|
||||
testServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
fmt.Fprintln(w, serviceListJsonData)
|
||||
}))
|
||||
defer testServer.Close()
|
||||
|
||||
// Overwrite URL constructor to access testServer
|
||||
makeURL = func(parts []string) string {
|
||||
return testServer.URL
|
||||
}
|
||||
|
||||
expectedServices := []string{"kubernetes", "mynginx", "mywebserver"}
|
||||
apiConn := NewK8sConnector("")
|
||||
serviceList, err := apiConn.GetServiceList()
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Expected no error from from GetNamespaceList(), instead got %v", err)
|
||||
}
|
||||
|
||||
if serviceList == nil {
|
||||
t.Errorf("Expected data from GetServiceList(), instead got nil")
|
||||
}
|
||||
|
||||
kind := serviceList.Kind
|
||||
if kind != "ServiceList" {
|
||||
t.Errorf("Expected data from GetServiceList() to have Kind='ServiceList', instead got Kind='%v'", kind)
|
||||
}
|
||||
|
||||
// Ensure correct number of services found
|
||||
expectedCount := len(expectedServices)
|
||||
serviceCount := len(serviceList.Items)
|
||||
if serviceCount != expectedCount {
|
||||
t.Errorf("Expected '%v' services from GetServiceList(), instead found '%v' services", expectedCount, serviceCount)
|
||||
}
|
||||
|
||||
// Check that all expectedServices are found in the parsed data
|
||||
for _, s := range expectedServices {
|
||||
found := false
|
||||
for _, item := range serviceList.Items {
|
||||
if item.Metadata.Name == s {
|
||||
found = true
|
||||
break
|
||||
}
|
||||
}
|
||||
if !found {
|
||||
t.Errorf("Expected '%v' service is not in the parsed data from GetServiceList()", s)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestGetServicesByNamespace(t *testing.T) {
|
||||
// Set up a test http server
|
||||
testServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
fmt.Fprintln(w, serviceListJsonData)
|
||||
}))
|
||||
defer testServer.Close()
|
||||
|
||||
// Overwrite URL constructor to access testServer
|
||||
makeURL = func(parts []string) string {
|
||||
return testServer.URL
|
||||
}
|
||||
|
||||
expectedNamespaces := []string{"default", "demo"}
|
||||
apiConn := NewK8sConnector("")
|
||||
servicesByNamespace, err := apiConn.GetServicesByNamespace()
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Expected no error from from GetServicesByNamespace(), instead got %v", err)
|
||||
}
|
||||
|
||||
// Ensure correct number of namespaces found
|
||||
expectedCount := len(expectedNamespaces)
|
||||
namespaceCount := len(servicesByNamespace)
|
||||
if namespaceCount != expectedCount {
|
||||
t.Errorf("Expected '%v' namespaces from GetServicesByNamespace(), instead found '%v' namespaces", expectedCount, namespaceCount)
|
||||
}
|
||||
|
||||
// Check that all expectedNamespaces are found in the parsed data
|
||||
for _, ns := range expectedNamespaces {
|
||||
_, ok := servicesByNamespace[ns]
|
||||
if !ok {
|
||||
t.Errorf("Expected '%v' namespace is not in the parsed data from GetServicesByNamespace()", ns)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestGetResourceList(t *testing.T) {
|
||||
// Set up a test http server
|
||||
testServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
fmt.Fprintln(w, resourceListJsonData)
|
||||
}))
|
||||
defer testServer.Close()
|
||||
|
||||
// Overwrite URL constructor to access testServer
|
||||
makeURL = func(parts []string) string {
|
||||
return testServer.URL
|
||||
}
|
||||
|
||||
expectedResources := []string{"bindings",
|
||||
"componentstatuses",
|
||||
"configmaps",
|
||||
"endpoints",
|
||||
"events",
|
||||
"limitranges",
|
||||
"namespaces",
|
||||
"namespaces/finalize",
|
||||
"namespaces/status",
|
||||
"nodes",
|
||||
"nodes/proxy",
|
||||
"nodes/status",
|
||||
"persistentvolumeclaims",
|
||||
"persistentvolumeclaims/status",
|
||||
"persistentvolumes",
|
||||
"persistentvolumes/status",
|
||||
"pods",
|
||||
"pods/attach",
|
||||
"pods/binding",
|
||||
"pods/exec",
|
||||
"pods/log",
|
||||
"pods/portforward",
|
||||
"pods/proxy",
|
||||
"pods/status",
|
||||
"podtemplates",
|
||||
"replicationcontrollers",
|
||||
"replicationcontrollers/scale",
|
||||
"replicationcontrollers/status",
|
||||
"resourcequotas",
|
||||
"resourcequotas/status",
|
||||
"secrets",
|
||||
"serviceaccounts",
|
||||
"services",
|
||||
"services/proxy",
|
||||
"services/status",
|
||||
}
|
||||
apiConn := NewK8sConnector("")
|
||||
resourceList, err := apiConn.GetResourceList()
|
||||
|
||||
if err != nil {
|
||||
t.Errorf("Expected no error from from GetResourceList(), instead got %v", err)
|
||||
}
|
||||
|
||||
if resourceList == nil {
|
||||
t.Errorf("Expected data from GetResourceList(), instead got nil")
|
||||
}
|
||||
|
||||
kind := resourceList.Kind
|
||||
if kind != "APIResourceList" {
|
||||
t.Errorf("Expected data from GetResourceList() to have Kind='ResourceList', instead got Kind='%v'", kind)
|
||||
}
|
||||
|
||||
// Ensure correct number of resources found
|
||||
expectedCount := len(expectedResources)
|
||||
resourceCount := len(resourceList.Resources)
|
||||
if resourceCount != expectedCount {
|
||||
t.Errorf("Expected '%v' resources from GetResourceList(), instead found '%v' resources", expectedCount, resourceCount)
|
||||
}
|
||||
|
||||
// Check that all expectedResources are found in the parsed data
|
||||
for _, r := range expectedResources {
|
||||
found := false
|
||||
for _, item := range resourceList.Resources {
|
||||
if item.Name == r {
|
||||
found = true
|
||||
break
|
||||
}
|
||||
}
|
||||
if !found {
|
||||
t.Errorf("Expected '%v' resource is not in the parsed data from GetResourceList()", r)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Sample namespace data for kubernetes with 3 namespaces:
|
||||
// "default", "demo", and "test".
|
||||
const namespaceListJsonData string = `{
|
||||
"kind": "NamespaceList",
|
||||
"apiVersion": "v1",
|
||||
"metadata": {
|
||||
"selfLink": "/api/v1/namespaces/",
|
||||
"resourceVersion": "121279"
|
||||
},
|
||||
"items": [
|
||||
{
|
||||
"metadata": {
|
||||
"name": "default",
|
||||
"selfLink": "/api/v1/namespaces/default",
|
||||
"uid": "fb1c92d1-2f39-11e6-b9db-0800279930f6",
|
||||
"resourceVersion": "6",
|
||||
"creationTimestamp": "2016-06-10T18:34:35Z"
|
||||
},
|
||||
"spec": {
|
||||
"finalizers": [
|
||||
"kubernetes"
|
||||
]
|
||||
},
|
||||
"status": {
|
||||
"phase": "Active"
|
||||
}
|
||||
},
|
||||
{
|
||||
"metadata": {
|
||||
"name": "demo",
|
||||
"selfLink": "/api/v1/namespaces/demo",
|
||||
"uid": "73be8ffd-2f3a-11e6-b9db-0800279930f6",
|
||||
"resourceVersion": "111",
|
||||
"creationTimestamp": "2016-06-10T18:37:57Z"
|
||||
},
|
||||
"spec": {
|
||||
"finalizers": [
|
||||
"kubernetes"
|
||||
]
|
||||
},
|
||||
"status": {
|
||||
"phase": "Active"
|
||||
}
|
||||
},
|
||||
{
|
||||
"metadata": {
|
||||
"name": "test",
|
||||
"selfLink": "/api/v1/namespaces/test",
|
||||
"uid": "c0be05fa-3352-11e6-b9db-0800279930f6",
|
||||
"resourceVersion": "121276",
|
||||
"creationTimestamp": "2016-06-15T23:41:59Z"
|
||||
},
|
||||
"spec": {
|
||||
"finalizers": [
|
||||
"kubernetes"
|
||||
]
|
||||
},
|
||||
"status": {
|
||||
"phase": "Active"
|
||||
}
|
||||
}
|
||||
]
|
||||
}`
|
||||
|
||||
// Sample service data for kubernetes with 3 services:
|
||||
// * "kubernetes" (in "default" namespace)
|
||||
// * "mynginx" (in "demo" namespace)
|
||||
// * "webserver" (in "demo" namespace)
|
||||
const serviceListJsonData string = `
|
||||
{
|
||||
"kind": "ServiceList",
|
||||
"apiVersion": "v1",
|
||||
"metadata": {
|
||||
"selfLink": "/api/v1/services",
|
||||
"resourceVersion": "147965"
|
||||
},
|
||||
"items": [
|
||||
{
|
||||
"metadata": {
|
||||
"name": "kubernetes",
|
||||
"namespace": "default",
|
||||
"selfLink": "/api/v1/namespaces/default/services/kubernetes",
|
||||
"uid": "fb1cb0d3-2f39-11e6-b9db-0800279930f6",
|
||||
"resourceVersion": "7",
|
||||
"creationTimestamp": "2016-06-10T18:34:35Z",
|
||||
"labels": {
|
||||
"component": "apiserver",
|
||||
"provider": "kubernetes"
|
||||
}
|
||||
},
|
||||
"spec": {
|
||||
"ports": [
|
||||
{
|
||||
"name": "https",
|
||||
"protocol": "TCP",
|
||||
"port": 443,
|
||||
"targetPort": 443
|
||||
}
|
||||
],
|
||||
"clusterIP": "10.0.0.1",
|
||||
"type": "ClusterIP",
|
||||
"sessionAffinity": "None"
|
||||
},
|
||||
"status": {
|
||||
"loadBalancer": {}
|
||||
}
|
||||
},
|
||||
{
|
||||
"metadata": {
|
||||
"name": "mynginx",
|
||||
"namespace": "demo",
|
||||
"selfLink": "/api/v1/namespaces/demo/services/mynginx",
|
||||
"uid": "93c117ac-2f3a-11e6-b9db-0800279930f6",
|
||||
"resourceVersion": "147",
|
||||
"creationTimestamp": "2016-06-10T18:38:51Z",
|
||||
"labels": {
|
||||
"run": "mynginx"
|
||||
}
|
||||
},
|
||||
"spec": {
|
||||
"ports": [
|
||||
{
|
||||
"protocol": "TCP",
|
||||
"port": 80,
|
||||
"targetPort": 80
|
||||
}
|
||||
],
|
||||
"selector": {
|
||||
"run": "mynginx"
|
||||
},
|
||||
"clusterIP": "10.0.0.132",
|
||||
"type": "ClusterIP",
|
||||
"sessionAffinity": "None"
|
||||
},
|
||||
"status": {
|
||||
"loadBalancer": {}
|
||||
}
|
||||
},
|
||||
{
|
||||
"metadata": {
|
||||
"name": "mywebserver",
|
||||
"namespace": "demo",
|
||||
"selfLink": "/api/v1/namespaces/demo/services/mywebserver",
|
||||
"uid": "aed62187-33e5-11e6-a224-0800279930f6",
|
||||
"resourceVersion": "138185",
|
||||
"creationTimestamp": "2016-06-16T17:13:45Z",
|
||||
"labels": {
|
||||
"run": "mywebserver"
|
||||
}
|
||||
},
|
||||
"spec": {
|
||||
"ports": [
|
||||
{
|
||||
"protocol": "TCP",
|
||||
"port": 443,
|
||||
"targetPort": 443
|
||||
}
|
||||
],
|
||||
"selector": {
|
||||
"run": "mywebserver"
|
||||
},
|
||||
"clusterIP": "10.0.0.63",
|
||||
"type": "ClusterIP",
|
||||
"sessionAffinity": "None"
|
||||
},
|
||||
"status": {
|
||||
"loadBalancer": {}
|
||||
}
|
||||
}
|
||||
]
|
||||
}
|
||||
`
|
||||
|
||||
// Sample resource data for kubernetes.
|
||||
const resourceListJsonData string = `{
|
||||
"kind": "APIResourceList",
|
||||
"groupVersion": "v1",
|
||||
"resources": [
|
||||
{
|
||||
"name": "bindings",
|
||||
"namespaced": true,
|
||||
"kind": "Binding"
|
||||
},
|
||||
{
|
||||
"name": "componentstatuses",
|
||||
"namespaced": false,
|
||||
"kind": "ComponentStatus"
|
||||
},
|
||||
{
|
||||
"name": "configmaps",
|
||||
"namespaced": true,
|
||||
"kind": "ConfigMap"
|
||||
},
|
||||
{
|
||||
"name": "endpoints",
|
||||
"namespaced": true,
|
||||
"kind": "Endpoints"
|
||||
},
|
||||
{
|
||||
"name": "events",
|
||||
"namespaced": true,
|
||||
"kind": "Event"
|
||||
},
|
||||
{
|
||||
"name": "limitranges",
|
||||
"namespaced": true,
|
||||
"kind": "LimitRange"
|
||||
},
|
||||
{
|
||||
"name": "namespaces",
|
||||
"namespaced": false,
|
||||
"kind": "Namespace"
|
||||
},
|
||||
{
|
||||
"name": "namespaces/finalize",
|
||||
"namespaced": false,
|
||||
"kind": "Namespace"
|
||||
},
|
||||
{
|
||||
"name": "namespaces/status",
|
||||
"namespaced": false,
|
||||
"kind": "Namespace"
|
||||
},
|
||||
{
|
||||
"name": "nodes",
|
||||
"namespaced": false,
|
||||
"kind": "Node"
|
||||
},
|
||||
{
|
||||
"name": "nodes/proxy",
|
||||
"namespaced": false,
|
||||
"kind": "Node"
|
||||
},
|
||||
{
|
||||
"name": "nodes/status",
|
||||
"namespaced": false,
|
||||
"kind": "Node"
|
||||
},
|
||||
{
|
||||
"name": "persistentvolumeclaims",
|
||||
"namespaced": true,
|
||||
"kind": "PersistentVolumeClaim"
|
||||
},
|
||||
{
|
||||
"name": "persistentvolumeclaims/status",
|
||||
"namespaced": true,
|
||||
"kind": "PersistentVolumeClaim"
|
||||
},
|
||||
{
|
||||
"name": "persistentvolumes",
|
||||
"namespaced": false,
|
||||
"kind": "PersistentVolume"
|
||||
},
|
||||
{
|
||||
"name": "persistentvolumes/status",
|
||||
"namespaced": false,
|
||||
"kind": "PersistentVolume"
|
||||
},
|
||||
{
|
||||
"name": "pods",
|
||||
"namespaced": true,
|
||||
"kind": "Pod"
|
||||
},
|
||||
{
|
||||
"name": "pods/attach",
|
||||
"namespaced": true,
|
||||
"kind": "Pod"
|
||||
},
|
||||
{
|
||||
"name": "pods/binding",
|
||||
"namespaced": true,
|
||||
"kind": "Binding"
|
||||
},
|
||||
{
|
||||
"name": "pods/exec",
|
||||
"namespaced": true,
|
||||
"kind": "Pod"
|
||||
},
|
||||
{
|
||||
"name": "pods/log",
|
||||
"namespaced": true,
|
||||
"kind": "Pod"
|
||||
},
|
||||
{
|
||||
"name": "pods/portforward",
|
||||
"namespaced": true,
|
||||
"kind": "Pod"
|
||||
},
|
||||
{
|
||||
"name": "pods/proxy",
|
||||
"namespaced": true,
|
||||
"kind": "Pod"
|
||||
},
|
||||
{
|
||||
"name": "pods/status",
|
||||
"namespaced": true,
|
||||
"kind": "Pod"
|
||||
},
|
||||
{
|
||||
"name": "podtemplates",
|
||||
"namespaced": true,
|
||||
"kind": "PodTemplate"
|
||||
},
|
||||
{
|
||||
"name": "replicationcontrollers",
|
||||
"namespaced": true,
|
||||
"kind": "ReplicationController"
|
||||
},
|
||||
{
|
||||
"name": "replicationcontrollers/scale",
|
||||
"namespaced": true,
|
||||
"kind": "Scale"
|
||||
},
|
||||
{
|
||||
"name": "replicationcontrollers/status",
|
||||
"namespaced": true,
|
||||
"kind": "ReplicationController"
|
||||
},
|
||||
{
|
||||
"name": "resourcequotas",
|
||||
"namespaced": true,
|
||||
"kind": "ResourceQuota"
|
||||
},
|
||||
{
|
||||
"name": "resourcequotas/status",
|
||||
"namespaced": true,
|
||||
"kind": "ResourceQuota"
|
||||
},
|
||||
{
|
||||
"name": "secrets",
|
||||
"namespaced": true,
|
||||
"kind": "Secret"
|
||||
},
|
||||
{
|
||||
"name": "serviceaccounts",
|
||||
"namespaced": true,
|
||||
"kind": "ServiceAccount"
|
||||
},
|
||||
{
|
||||
"name": "services",
|
||||
"namespaced": true,
|
||||
"kind": "Service"
|
||||
},
|
||||
{
|
||||
"name": "services/proxy",
|
||||
"namespaced": true,
|
||||
"kind": "Service"
|
||||
},
|
||||
{
|
||||
"name": "services/status",
|
||||
"namespaced": true,
|
||||
"kind": "Service"
|
||||
}
|
||||
]
|
||||
}`
|
||||
|
|
@ -20,10 +20,6 @@ import (
|
|||
clientcmdapi "k8s.io/kubernetes/pkg/client/unversioned/clientcmd/api"
|
||||
)
|
||||
|
||||
const (
|
||||
defaultResyncPeriod = 5 * time.Minute
|
||||
)
|
||||
|
||||
type Kubernetes struct {
|
||||
Next middleware.Handler
|
||||
Zones []string
|
||||
|
|
@ -37,7 +33,7 @@ type Kubernetes struct {
|
|||
|
||||
func (g *Kubernetes) StartKubeCache() error {
|
||||
// For a custom api server or running outside a k8s cluster
|
||||
// set URL in env.KUBERNETES_MASTER
|
||||
// set URL in env.KUBERNETES_MASTER or set endpoint in Corefile
|
||||
loadingRules := clientcmd.NewDefaultClientConfigLoadingRules()
|
||||
overrides := &clientcmd.ConfigOverrides{}
|
||||
if len(g.APIEndpoint) > 0 {
|
||||
|
|
@ -55,6 +51,7 @@ func (g *Kubernetes) StartKubeCache() error {
|
|||
log.Printf("[ERROR] Failed to create kubernetes notification controller: %v", err)
|
||||
return err
|
||||
}
|
||||
log.Printf("[debug] Starting kubernetes middleware with k8s API resync period: %s", g.ResyncPeriod)
|
||||
g.APIConn = newdnsController(kubeClient, g.ResyncPeriod)
|
||||
|
||||
go g.APIConn.Run()
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue