新增learn-kubernetes（https://github.com/yyong-brs/learn-kubernetes）相关文件

2024-02-20 17:15:27 +08:00
parent 6706e1a633
commit 34158042ad
1529 changed files with 177765 additions and 0 deletions
--- a/learn/learn-kubernetes-master/kiamol/ch14/docker-images/image-gallery/Dockerfile
+++ b/learn/learn-kubernetes-master/kiamol/ch14/docker-images/image-gallery/Dockerfile
@@ -0,0 +1,21 @@
+FROM golang:1.15-alpine  AS builder
+ENV CGO_ENABLED=0
+
+WORKDIR /src
+COPY go.mod .
+RUN go mod download
+
+COPY main.go .
+RUN go build -o /server
+
+# app
+FROM alpine:3.15
+
+ENV IMAGE_API_URL="http://apod-api/image" \
+    ACCESS_API_URL="http://apod-log/access-log"
+
+CMD ["/web/server"]
+
+WORKDIR /web
+COPY index.html .
+COPY --from=builder /server .
--- a/learn/learn-kubernetes-master/kiamol/ch14/docker-images/image-gallery/go.mod
+++ b/learn/learn-kubernetes-master/kiamol/ch14/docker-images/image-gallery/go.mod
@@ -0,0 +1,5 @@
+module kiamol/image-gallery
+
+go 1.15
+
+require github.com/prometheus/client_golang v1.7.1
--- a/learn/learn-kubernetes-master/kiamol/ch14/docker-images/image-gallery/index.html
+++ b/learn/learn-kubernetes-master/kiamol/ch14/docker-images/image-gallery/index.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Image Gallery</title>
+        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
+              crossorigin="anonymous"
+              integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T"/>
+</head>
+<body>
+
+    <div class="text-center">
+        <h1 class="display-4">Image Gallery</h1>
+        <h2>{{.Caption}}</h2>
+        <img src="{{.Url}}"/>
+        <footer class="blockquote-footer">&copy; {{.Copyright}}</footer>
+    </div>
+    
+</body>
+</html>
--- a/learn/learn-kubernetes-master/kiamol/ch14/docker-images/image-gallery/main.go
+++ b/learn/learn-kubernetes-master/kiamol/ch14/docker-images/image-gallery/main.go
@@ -0,0 +1,78 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"html/template"
+	"io/ioutil"	
+	"math/rand"
+	"net/http"
+	"os"
+	"time"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type Image struct {
+	Url       string `json:"url"`
+	Caption   string `json:"caption"`
+	Copyright string `json:"copyright"`
+}
+
+type AccessLog struct {
+	ClientIP  string `json:"clientIp"`
+}
+
+func main() {
+	tmpl := template.Must(template.ParseFiles("index.html"))
+	imageApiUrl :=  os.Getenv("IMAGE_API_URL")
+	logApiUrl := os.Getenv("ACCESS_API_URL")
+
+	//re-use HTTP client with minimal keep-alive
+	tr := &http.Transport{
+		MaxIdleConns: 1,
+	    IdleConnTimeout: 1 * time.Second,
+	}
+	client := &http.Client{Transport: tr}
+
+	//create Prometheus metrics
+	inFlightGauge := prometheus.NewGauge(prometheus.GaugeOpts{
+		Name: "image_gallery_in_flight_requests",
+		Help: "Image Gallery - in-flight requests",
+	})
+	requestCounter := prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "image_gallery_requests_total",
+			Help: "Image Gallery - total requests",
+		},
+		[]string{"code", "method"},
+	)
+
+	prometheus.MustRegister(inFlightGauge, requestCounter)
+
+	rand.Seed(time.Now().UnixNano())
+
+	indexHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		response,_ := client.Get(imageApiUrl)
+		defer response.Body.Close()
+		data,_ := ioutil.ReadAll(response.Body)
+		image := Image{}
+		json.Unmarshal([]byte(data), &image)	
+		tmpl.Execute(w, image)
+		log := AccessLog{
+			ClientIP: r.RemoteAddr,
+		}
+		jsonLog,_ := json.Marshal(log)
+		response,_ = client.Post(logApiUrl, "application/json", bytes.NewBuffer(jsonLog))
+		defer response.Body.Close()
+
+	})
+
+	wrappedIndexHandler := promhttp.InstrumentHandlerInFlight(inFlightGauge,
+						    promhttp.InstrumentHandlerCounter(requestCounter, indexHandler))
+	
+	http.Handle("/", wrappedIndexHandler)
+	http.Handle("/metrics", promhttp.Handler())
+	
+	http.ListenAndServe(":80", nil)
+}