main.go

package main

import (
	"fmt"
	"log"
	"net/http"
	"os"

	"github.com/gorilla/mux"
)

func main() {
	r := mux.NewRouter()
	r.HandleFunc("/ready", func(w http.ResponseWriter, r *http.Request) {
		log.Printf("request on URI /ready")
		if _, err := os.Stat("/ready"); os.IsNotExist(err) {
			w.WriteHeader(500)
			log.Printf("--> readiness probe failed")
			return
		}
		w.WriteHeader(200)
	})
	r.HandleFunc("/hello", func(w http.ResponseWriter, r *http.Request) {
		log.Printf("request on URI /hello")
		fmt.Fprintf(w, "Hello I am pod %s\nWelcome to kubernetes lab.\n", os.Getenv("HOSTNAME"))
	})
	r.HandleFunc("/env", func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintf(w, "%v", os.Environ())
	})
	r.HandleFunc("/mydeployment", func(w http.ResponseWriter, r *http.Request) {
		log.Printf("request on URI /hello")
		fmt.Fprintf(w, "Hello I am pod %s\nWelcome to kubernetes lab.\n", os.Getenv("HOSTNAME"))
		fmt.Fprintf(w, "MY_DEPLOYMENT environment variable is set to: %s\n", os.Getenv("MY_DEPLOYMENT"))
	})

	log.Printf("Server listening on port 8080...")
	http.ListenAndServe(":8080", r)
}