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util.go
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util.go
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/*
Copyright 2019 The Fission Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package util
import (
"net/http"
v1 "k8s.io/api/networking/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
fv1 "github.com/fission/fission/pkg/apis/core/v1"
)
func GetIngressSpec(namespace string, trigger *fv1.HTTPTrigger) *v1.Ingress {
// TODO: remove backward compatibility
host, path := trigger.Spec.Host, trigger.Spec.RelativeURL
if trigger.Spec.Prefix != nil && *trigger.Spec.Prefix != "" {
path = *trigger.Spec.Prefix
}
if len(trigger.Spec.IngressConfig.Host) > 0 && len(trigger.Spec.IngressConfig.Path) > 0 {
host, path = trigger.Spec.IngressConfig.Host, trigger.Spec.IngressConfig.Path
}
// In Ingress, to accept requests from all host, the host field will
// be an empty string instead of "*" shown in kubectl. So replace it
// with empty string
if host == "*" {
host = "" // wildcard Ingress host
}
var ingTLS []v1.IngressTLS
if len(trigger.Spec.IngressConfig.TLS) > 0 {
ingTLS = []v1.IngressTLS{
{
Hosts: []string{
trigger.Spec.IngressConfig.Host,
},
SecretName: trigger.Spec.IngressConfig.TLS,
},
}
}
var pathType v1.PathType = v1.PathTypeImplementationSpecific
ing := &v1.Ingress{
ObjectMeta: metav1.ObjectMeta{
Labels: GetDeployLabels(trigger),
Name: trigger.ObjectMeta.Name,
// The Ingress NS MUST be same as Router NS, check long discussion:
// https://github.com/kubernetes/kubernetes/issues/17088
// We need to revisit this in future, once Kubernetes supports cross namespace ingress
Namespace: namespace,
Annotations: trigger.Spec.IngressConfig.Annotations,
},
Spec: v1.IngressSpec{
TLS: ingTLS,
Rules: []v1.IngressRule{
{
Host: host,
IngressRuleValue: v1.IngressRuleValue{
HTTP: &v1.HTTPIngressRuleValue{
Paths: []v1.HTTPIngressPath{
{
Backend: v1.IngressBackend{
Service: &v1.IngressServiceBackend{
Name: "router",
Port: v1.ServiceBackendPort{
Number: 80,
},
},
},
Path: path,
PathType: &pathType,
},
},
},
},
},
},
},
}
return ing
}
func GetDeployLabels(trigger *fv1.HTTPTrigger) map[string]string {
// TODO: support function weight
return map[string]string{
"triggerName": trigger.ObjectMeta.Name,
"functionName": trigger.Spec.FunctionReference.Name,
"triggerNamespace": trigger.ObjectMeta.Namespace,
}
}
func IsWebsocketRequest(request *http.Request) bool {
return request.Header.Get("Upgrade") == "websocket" &&
request.Header.Get("Connection") == "Upgrade"
}