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Add app-root annotation support for kubernetes ingress

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This commit is contained in:
Kim Min 2018-02-19 09:36:03 -05:00 committed by Traefiker Bot
parent d47c1a7975
commit 5ef55dd8b4
4 changed files with 96 additions and 6 deletions
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1
docs/configuration/backends/kubernetes.md
View file

@ -127,6 +127,7 @@ The following general annotations are applicable on the Ingress object:
| `traefik.ingress.kubernetes.io/rewrite-target: /users` | Replaces each matched Ingress path with the specified one, and adds the old path to the `X-Replaced-Path` header. |
| `traefik.ingress.kubernetes.io/rule-type: PathPrefixStrip` | Override the default frontend rule type. Default: `PathPrefix`. |
| `traefik.ingress.kubernetes.io/whitelist-source-range: "1.2.3.0/24, fe80::/16"` | A comma-separated list of IP ranges permitted for access. all source IPs are permitted if the list is empty or a single range is ill-formatted. |
| `traefik.ingress.kubernetes.io/app-root: "/index.html"` | Redirects all requests for `/` to the defined path. Non-root paths will not be affected by this annotation and handled normally. This annotation may not be combined with the `ReplacePath` rule type or any other annotation leveraging that rule type. Trying to do so leads to an error and the corresponding Ingress object being ignored. |
<1> `traefik.ingress.kubernetes.io/error-pages` example:

1
provider/kubernetes/annotations.go
View file

@ -29,6 +29,7 @@ const (
annotationKubernetesRateLimit = "ingress.kubernetes.io/rate-limit"
annotationKubernetesErrorPages = "ingress.kubernetes.io/error-pages"
annotationKubernetesBuffering = "ingress.kubernetes.io/buffering"
annotationKubernetesAppRoot = "ingress.kubernetes.io/app-root"
annotationKubernetesSSLRedirect = "ingress.kubernetes.io/ssl-redirect"
annotationKubernetesHSTSMaxAge = "ingress.kubernetes.io/hsts-max-age"

33
provider/kubernetes/kubernetes.go
View file

@ -226,7 +226,13 @@ func (p *Provider) loadIngresses(k8sClient Client) (*types.Configuration, error)
}
}
if rule := getRuleForPath(pa, i); rule != "" {
rule, err := getRuleForPath(pa, i)
if err != nil {
log.Errorf("Failed to get rule for ingress %s/%s: %s", i.Namespace, i.Name, err)
delete(templateObjects.Frontends, baseName)
continue
}
if rule != "" {
templateObjects.Frontends[baseName].Routes[pa.Path] = types.Route{
Rule: rule,
}
@ -313,19 +319,34 @@ func (p *Provider) loadConfig(templateObjects types.Configuration) *types.Config
return configuration
}
func getRuleForPath(pa extensionsv1beta1.HTTPIngressPath, i *extensionsv1beta1.Ingress) string {
func getRuleForPath(pa extensionsv1beta1.HTTPIngressPath, i *extensionsv1beta1.Ingress) (string, error) {
if len(pa.Path) == 0 {
return ""
return "", nil
}
ruleType := getStringValue(i.Annotations, annotationKubernetesRuleType, ruleTypePathPrefix)
rules := []string{ruleType + ":" + pa.Path}
if rewriteTarget := getStringValue(i.Annotations, annotationKubernetesRewriteTarget, ""); rewriteTarget != "" {
rules = append(rules, ruleTypeReplacePath+":"+rewriteTarget)
var pathReplaceAnnotation string
if ruleType == ruleTypeReplacePath {
pathReplaceAnnotation = annotationKubernetesRuleType
}
return strings.Join(rules, ";")
if rewriteTarget := getStringValue(i.Annotations, annotationKubernetesRewriteTarget, ""); rewriteTarget != "" {
if pathReplaceAnnotation != "" {
return "", fmt.Errorf("rewrite-target must not be used together with annotation %q", pathReplaceAnnotation)
}
rules = append(rules, ruleTypeReplacePath+":"+rewriteTarget)
pathReplaceAnnotation = annotationKubernetesRewriteTarget
}
if rootPath := label.GetStringValue(i.Annotations, annotationKubernetesAppRoot, ""); rootPath != "" && pa.Path == "/" {
if pathReplaceAnnotation != "" {
return "", fmt.Errorf("app-root must not be used together with annotation %q", pathReplaceAnnotation)
}
rules = append(rules, ruleTypeReplacePath+":"+rootPath)
}
return strings.Join(rules, ";"), nil
}
func getRuleForHost(host string) string {

67
provider/kubernetes/kubernetes_test.go
View file

@ -737,6 +737,45 @@ rateset:
iPaths(onePath(iPath("/ratelimit"), iBackend("service1", intstr.FromInt(80))))),
),
),
buildIngress(
iNamespace("testing"),
iAnnotation(annotationKubernetesAppRoot, "/root"),
iRules(
iRule(
iHost("root"),
iPaths(
onePath(iPath("/"), iBackend("service1", intstr.FromInt(80))),
onePath(iPath("/root1"), iBackend("service1", intstr.FromInt(80))),
),
),
),
),
buildIngress(
iNamespace("testing"),
iAnnotation(annotationKubernetesAppRoot, "/root2"),
iAnnotation(annotationKubernetesRewriteTarget, "/abc"),
iRules(
iRule(
iHost("root2"),
iPaths(
onePath(iPath("/"), iBackend("service2", intstr.FromInt(80))),
),
),
),
),
buildIngress(
iNamespace("testing"),
iAnnotation(annotationKubernetesRuleType, ruleTypeReplacePath),
iAnnotation(annotationKubernetesRewriteTarget, "/abc"),
iRules(
iRule(
iHost("root2"),
iPaths(
onePath(iPath("/"), iBackend("service2", intstr.FromInt(80))),
),
),
),
),
buildIngress(
iNamespace("testing"),
iAnnotation(annotationKubernetesIngressClass, "traefik"),
@ -880,6 +919,20 @@ rateset:
server("http://example.com", weight(1))),
lbMethod("wrr"),
),
backend("root/",
servers(
server("http://example.com", weight(1))),
lbMethod("wrr"),
),
backend("root/root1",
servers(
server("http://example.com", weight(1))),
lbMethod("wrr"),
),
backend("root2/",
servers(),
lbMethod("wrr"),
),
),
frontends(
frontend("foo/bar",
@ -994,6 +1047,20 @@ rateset:
route("/customheaders", "PathPrefix:/customheaders"),
route("custom-headers", "Host:custom-headers")),
),
frontend("root/",
passHostHeader(),
routes(
route("/", "PathPrefix:/;ReplacePath:/root"),
route("root", "Host:root"),
),
),
frontend("root/root1",
passHostHeader(),
routes(
route("/root1", "PathPrefix:/root1"),
route("root", "Host:root"),
),
),
),
)