93 lines
2.5 KiB
Go
93 lines
2.5 KiB
Go
/*
|
|
Copyright 2016 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.
|
|
*/
|
|
|
|
/*
|
|
|
|
This is the Fission Router package.
|
|
|
|
Its job is to:
|
|
|
|
1. Keep track of HTTP triggers and their mappings to functions
|
|
|
|
Use the controller API to get and watch this state.
|
|
|
|
2. Given a function, get a reference to a routable function run service
|
|
|
|
Use the ContainerPoolManager API to get a service backed by one
|
|
or more function run containers. The container(s) backing the
|
|
service may be newly created, or they might be reused. The only
|
|
requirement is that one or more containers backs the service.
|
|
|
|
3. Forward the request to the service, and send the response back.
|
|
|
|
Plain ol HTTP.
|
|
|
|
*/
|
|
|
|
package router
|
|
|
|
import (
|
|
"fmt"
|
|
"github.com/gorilla/mux"
|
|
flag "github.com/ogier/pflag"
|
|
"net/http"
|
|
)
|
|
|
|
type (
|
|
options struct {
|
|
port int
|
|
poolManagerUrl string
|
|
controllerUrl string
|
|
//...
|
|
}
|
|
)
|
|
|
|
// request url ---[mux]---> Function(name,uid) ----[fmap]----> k8s service url
|
|
|
|
// request url ---[trigger]---> Function(name, deployment) ----[deployment]----> Function(name, uid) ----[pool mgr]---> k8s service url
|
|
|
|
func router(httpTriggerSet *HTTPTriggerSet) *mutableRouter {
|
|
muxRouter := mux.NewRouter()
|
|
mr := NewMutableRouter(muxRouter)
|
|
httpTriggerSet.subscribeRouter(mr)
|
|
return mr
|
|
}
|
|
|
|
func server(port int, httpTriggerSet *HTTPTriggerSet) {
|
|
mr := router(httpTriggerSet)
|
|
url := fmt.Sprintf(":%v", port)
|
|
http.ListenAndServe(url, mr)
|
|
}
|
|
|
|
func getOptions() *options {
|
|
options := &options{}
|
|
|
|
flag.IntVar(&options.port, "port", 80, "Port to listen on")
|
|
|
|
// default to using dns service discovery
|
|
flag.StringVar(&options.poolManagerUrl, "poolmanager_url", "http://poolmanager/", "URL for the PoolManager service")
|
|
flag.StringVar(&options.controllerUrl, "controller_url", "http://controller/", "URL for the controller service")
|
|
|
|
return options
|
|
}
|
|
|
|
func main() {
|
|
options := getOptions()
|
|
fmap := makeFunctionServiceMap()
|
|
triggers := makeHTTPTriggerSet(fmap, options.controllerUrl, options.poolManagerUrl)
|
|
server(options.port, triggers)
|
|
}
|