github.com/uber/kraken@v0.1.4/tools/bin/puller/main.go (about)

     1  // Copyright (c) 2016-2019 Uber Technologies, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  package main
    15  
    16  import (
    17  	"flag"
    18  	"net/http"
    19  	"strings"
    20  
    21  	"github.com/gorilla/mux"
    22  	"github.com/uber/kraken/utils/log"
    23  )
    24  
    25  const listenAddr = "0.0.0.0:5055"
    26  
    27  // mini service that receives docker push notifications and pull from local registry
    28  func main() {
    29  	var docker bool
    30  	var source string
    31  	var image string
    32  	flag.StringVar(&source, "source", "", "source registry")
    33  	flag.StringVar(&image, "image", "", "<repo>:<tag>")
    34  	flag.BoolVar(&docker, "docker", false, "if to use docker")
    35  	flag.Parse()
    36  
    37  	// If source and image are specified, puller exits after pulling one image.
    38  	if source != "" && image != "" {
    39  		log.Infof("pulling image from %s/%s", source, image)
    40  		str := strings.Split(image, ":")
    41  		if len(str) != 2 {
    42  			log.Fatalf("invalid image: %s", image)
    43  		}
    44  		if err := PullImage(source, str[0], str[1], docker); err != nil {
    45  			log.Fatal(err)
    46  		}
    47  		return
    48  	}
    49  
    50  	// NotificationHandler pulls image once it receives notification from docker registry.
    51  	// It is a long running process.
    52  	notification, err := NewNotificationHandler(200, docker)
    53  	if err != nil {
    54  		log.Fatal(err)
    55  	}
    56  
    57  	router := mux.NewRouter()
    58  	router.HandleFunc("/", HealthHandler).
    59  		Methods("GET")
    60  	router.HandleFunc("/notifications", notification.Handler).
    61  		Methods("POST")
    62  	router.HandleFunc("/notifications", HealthHandler).
    63  		Methods("GET")
    64  
    65  	log.Infof("listening on %s", listenAddr)
    66  	log.Fatal(http.ListenAndServe(listenAddr, router))
    67  }