package main
import (
    "fmt"
    "github.com/gin-gonic/gin"
)
func main() {
    fmt.Println("Api Go!")
    r := gin.Default()
    r.GET("/ping", ping)
    r.Run(":8080")
}
func ping(c *gin.Context) {
    c.JSON(200, gin.H{
       "message": "pong",
    })
}

FROM golang:1.22-alpine as builder
WORKDIR /go/app
COPY . .
RUN go build -v -o app cmd/api/main.go
FROM alpine
COPY --from=builder /go/app/ .
EXPOSE 8080
CMD ["/app"]

docker build -t mertcakmak2/go-container .

package main
import (
 "fmt"
 "github.com/gin-gonic/gin"
 "net/http"
 "net/http/httputil"
 "net/url"
)
func main() {
 fmt.Println("Sidecar Go!")
 r := gin.Default()
 // Reverse Proxy
 r.Any("/*proxyPath", authProxy)
 r.Run(":8081")
}
// Simulate Auth
func authProxy(c *gin.Context) {
 // Bearer Token Check...
 // MAIN CONTAINER URL
 remote, err := url.Parse("http://localhost:8080")
 if err != nil {
  panic(err)
 }
 proxy := httputil.NewSingleHostReverseProxy(remote)
 proxy.Director = func(req *http.Request) {
  req.Header = c.Request.Header
  req.Host = remote.Host
  req.URL.Scheme = remote.Scheme
  req.URL.Host = remote.Host
  req.URL.Path = c.Param("proxyPath")
 }
 proxy.ServeHTTP(c.Writer, c.Request)
}

FROM golang:1.22-alpine as builder
WORKDIR /go/app
COPY . .
RUN go build -v -o app cmd/sidecar/main.go
FROM alpine
COPY --from=builder /go/app/ .
EXPOSE 8081
CMD ["/app"]

docker build -f Dockerfile.sidecar -t mertcakmak2/go-sidecar .

apiVersion: v1
kind: Service
metadata:
  name: go-container-sidecar
spec:
  selector:
    app: go-container-sidecar
  ports:
    - protocol: "TCP"
      name: main-container-port
      port: 8080
      targetPort: 8080
    - protocol: "TCP"
      name: sidecar-container-port
      port: 8081
      targetPort: 8081
  type: ClusterIP
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: go-container-sidecar
spec:
  selector:
    matchLabels:
      app: go-container-sidecar
  replicas: 1
  template:
    metadata:
      labels:
        app: go-container-sidecar
    spec:
      containers:
        - name: go-container
          image: mertcakmak2/go-container:latest
          imagePullPolicy: Always
          ports:
            - containerPort: 8080
        - name: go-sidecar
          image: mertcakmak2/go-sidecar:latest
          imagePullPolicy: Always
          ports:
            - containerPort: 8081

kubectl apply -f k8s-deployment.yaml

minikube service go-container-sidecar --url