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feat(k8s): add rate limit annotations.

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This commit is contained in:
Fernandez Ludovic 2017-12-21 22:07:37 +01:00 committed by Traefiker
parent 4c0d6e211b
commit 1c495d7ea4
4 changed files with 117 additions and 8 deletions
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53
provider/kubernetes/builder_configuration_test.go
View File

@ -2,7 +2,9 @@ package kubernetes
import (
"testing"
"time"
"github.com/containous/flaeg"
"github.com/containous/traefik/tls"
"github.com/containous/traefik/types"
"github.com/stretchr/testify/assert"
@ -252,6 +254,57 @@ func errorBackend(backend string) func(*types.ErrorPage) {
}
}
func rateLimit(opts ...func(*types.RateLimit)) func(*types.Frontend) {
return func(f *types.Frontend) {
if f.RateLimit == nil {
f.RateLimit = &types.RateLimit{}
}
for _, opt := range opts {
opt(f.RateLimit)
}
}
}
func rateExtractorFunc(exp string) func(*types.RateLimit) {
return func(limit *types.RateLimit) {
limit.ExtractorFunc = exp
}
}
func rateSet(name string, opts ...func(*types.Rate)) func(*types.RateLimit) {
return func(limit *types.RateLimit) {
if limit.RateSet == nil {
limit.RateSet = make(map[string]*types.Rate)
}
if len(name) > 0 {
limit.RateSet[name] = &types.Rate{}
for _, opt := range opts {
opt(limit.RateSet[name])
}
}
}
}
func limitAverage(avg int64) func(*types.Rate) {
return func(rate *types.Rate) {
rate.Average = avg
}
}
func limitBurst(burst int64) func(*types.Rate) {
return func(rate *types.Rate) {
rate.Burst = burst
}
}
func limitPeriod(period time.Duration) func(*types.Rate) {
return func(rate *types.Rate) {
rate.Period = flaeg.Duration(period)
}
}
func passTLSCert() func(*types.Frontend) {
return func(f *types.Frontend) {
f.PassTLSCert = true

27
provider/kubernetes/kubernetes.go
View File

@ -234,6 +234,7 @@ func (p *Provider) loadIngresses(k8sClient Client) (*types.Configuration, error)
EntryPoints: entryPoints,
Headers: getHeader(i),
Errors: errorPages,
RateLimit: getRateLimit(i),
}
}
@ -507,6 +508,19 @@ func getFrontendRedirect(i *v1beta1.Ingress) *types.Redirect {
return nil
}
func getBuffering(service *v1.Service) *types.Buffering {
if label.HasPrefix(service.Annotations, label.TraefikBackendBuffering) {
return &types.Buffering{
MaxRequestBodyBytes: label.GetInt64Value(service.Annotations, label.TraefikBackendBufferingMaxRequestBodyBytes, 0),
MemRequestBodyBytes: label.GetInt64Value(service.Annotations, label.TraefikBackendBufferingMemRequestBodyBytes, 0),
MaxResponseBodyBytes: label.GetInt64Value(service.Annotations, label.TraefikBackendBufferingMaxResponseBodyBytes, 0),
MemResponseBodyBytes: label.GetInt64Value(service.Annotations, label.TraefikBackendBufferingMemResponseBodyBytes, 0),
RetryExpression: label.GetStringValue(service.Annotations, label.TraefikBackendBufferingRetryExpression, ""),
}
}
return nil
}
func getLoadBalancer(service *v1.Service) *types.LoadBalancer {
loadBalancer := &types.LoadBalancer{
Method: "wrr",
@ -564,14 +578,11 @@ func getHeader(i *v1beta1.Ingress) *types.Headers {
}
}
func getBuffering(service *v1.Service) *types.Buffering {
if label.HasPrefix(service.Annotations, label.TraefikBackendBuffering) {
return &types.Buffering{
MaxRequestBodyBytes: label.GetInt64Value(service.Annotations, label.TraefikBackendBufferingMaxRequestBodyBytes, 0),
MemRequestBodyBytes: label.GetInt64Value(service.Annotations, label.TraefikBackendBufferingMemRequestBodyBytes, 0),
MaxResponseBodyBytes: label.GetInt64Value(service.Annotations, label.TraefikBackendBufferingMaxResponseBodyBytes, 0),
MemResponseBodyBytes: label.GetInt64Value(service.Annotations, label.TraefikBackendBufferingMemResponseBodyBytes, 0),
RetryExpression: label.GetStringValue(service.Annotations, label.TraefikBackendBufferingRetryExpression, ""),
func getRateLimit(i *v1beta1.Ingress) *types.RateLimit {
if rlExtractFunc := i.Annotations[label.TraefikFrontendRateLimitExtractorFunc]; len(rlExtractFunc) > 0 {
return &types.RateLimit{
ExtractorFunc: rlExtractFunc,
RateSet: label.ParseRateSets(i.Annotations, label.Prefix+label.BaseFrontendRateLimit, label.RegexpFrontendRateLimit),
}
}
return nil

33
provider/kubernetes/kubernetes_test.go
View File

@ -5,6 +5,7 @@ import (
"fmt"
"reflect"
"testing"
"time"
"github.com/containous/traefik/provider/label"
"github.com/containous/traefik/tls"
@ -685,6 +686,22 @@ func TestIngressAnnotations(t *testing.T) {
iPaths(onePath(iPath("/errorpages"), iBackend("service1", intstr.FromInt(80))))),
),
),
buildIngress(
iNamespace("testing"),
iAnnotation(annotationKubernetesIngressClass, "traefik"),
iAnnotation(label.TraefikFrontendRateLimitExtractorFunc, "client.ip"),
iAnnotation(label.Prefix+label.BaseFrontendRateLimit+"foo."+label.SuffixRateLimitPeriod, "6"),
iAnnotation(label.Prefix+label.BaseFrontendRateLimit+"foo."+label.SuffixRateLimitAverage, "12"),
iAnnotation(label.Prefix+label.BaseFrontendRateLimit+"foo."+label.SuffixRateLimitBurst, "18"),
iAnnotation(label.Prefix+label.BaseFrontendRateLimit+"bar."+label.SuffixRateLimitPeriod, "3"),
iAnnotation(label.Prefix+label.BaseFrontendRateLimit+"bar."+label.SuffixRateLimitAverage, "6"),
iAnnotation(label.Prefix+label.BaseFrontendRateLimit+"bar."+label.SuffixRateLimitBurst, "9"),
iRules(
iRule(
iHost("rate-limit"),
iPaths(onePath(iPath("/ratelimit"), iBackend("service1", intstr.FromInt(80))))),
),
),
}
services := []*v1.Service{
@ -785,6 +802,12 @@ func TestIngressAnnotations(t *testing.T) {
server("http://example.com", weight(1))),
lbMethod("wrr"),
),
backend("rate-limit/ratelimit",
servers(
server("http://example.com", weight(1)),
server("http://example.com", weight(1))),
lbMethod("wrr"),
),
),
frontends(
frontend("foo/bar",
@ -863,6 +886,16 @@ func TestIngressAnnotations(t *testing.T) {
route("/errorpages", "PathPrefix:/errorpages"),
route("error-pages", "Host:error-pages")),
),
frontend("rate-limit/ratelimit",
headers(),
passHostHeader(),
rateLimit(rateExtractorFunc("client.ip"),
rateSet("foo", limitPeriod(6*time.Second), limitAverage(12), limitBurst(18)),
rateSet("bar", limitPeriod(3*time.Second), limitAverage(6), limitBurst(9))),
routes(
route("/ratelimit", "PathPrefix:/ratelimit"),
route("rate-limit", "Host:rate-limit")),
),
),
)

12
templates/kubernetes.tmpl
View File

@ -75,6 +75,18 @@
{{end}}
{{end}}
{{ if $frontend.RateLimit }}
[frontends."frontend-{{$frontendName}}".rateLimit]
extractorFunc = "{{ $frontend.RateLimit.ExtractorFunc }}"
[frontends."frontend-{{$frontendName}}".rateLimit.rateSet]
{{ range $limitName, $limit := $frontend.RateLimit.RateSet }}
[frontends."frontend-{{$frontendName}}".rateLimit.rateSet.{{ $limitName }}]
period = "{{ $limit.Period }}"
average = {{ $limit.Average }}
burst = {{ $limit.Burst }}
{{end}}
{{end}}
{{if $frontend.Headers }}
[frontends."{{$frontendName}}".headers]
SSLRedirect = {{$frontend.Headers.SSLRedirect}}