Add envoy proxy

database/initdb/0002.sh

@@ -25,7 +25,7 @@ psql -v ON_ERROR_STOP=1 --username pero --password "pero.000" --dbname komponira
     INSERT INTO public.products (id, name, description, image) VALUES (5, 'Kava', 'Kielbasa landjaeger sausage capicola sirloin filet mignon doner t-bone. Swine corned beef turkey hamburger flank pork chop capicola prosciutto venison shoulder strip steak jowl. Tongue pork salami biltong doner chislic andouille ball tip strip steak prosciutto.', 'kava.jpeg');
     INSERT INTO public.products (id, name, description, image) VALUES (6, 'Kava s mlijekom', 'Shoulder bacon flank chuck jowl hamburger swine fatback shank shankle t-bone buffalo leberkas cow.', 'kava-s-mlijekom.jpeg');
     INSERT INTO public.products (id, name, description, image) VALUES (7, 'Kava bez šećera', 'Pork pig prosciutto shoulder, landjaeger drumstick andouille filet mignon pork chop tri-tip bresaola tail.', 'kava-bez-secera.jpeg');
-    INSERT INTO public.products (id, name, description, image) VALUES (8, 'Cappucino', 'Fatback frankfurter jowl capicola. Buffalo short loin pancetta cow ball tip chicken. Pork loin biltong filet mignon rump t-bone kielbasa tail hamburger jowl pancetta andouille short loin.', 'cappucino.jpeg');
+    INSERT INTO public.products (id, name, description, image) VALUES (8, 'Cappuccino', 'Fatback frankfurter jowl capicola. Buffalo short loin pancetta cow ball tip chicken. Pork loin biltong filet mignon rump t-bone kielbasa tail hamburger jowl pancetta andouille short loin.', 'cappucino.jpeg');
     INSERT INTO public.products (id, name, description, image) VALUES (9, 'Mocca', 'Capicola salami shoulder tri-tip chicken meatball. Tail meatball filet mignon, landjaeger meatloaf sirloin strip steak chicken capicola picanha cow andouille rump shoulder. Chuck buffalo doner short ribs bacon ground round pancetta flank picanha pork loin.', 'mocca.jpeg');
     INSERT INTO public.products (id, name, description, image) VALUES (10, 'Sendvič sa sirom', 'Ball tip beef ribs shank ground round t-bone, strip steak leberkas chuck beef pancetta burgdoggen biltong doner swine brisket. Pork chop tail cow filet mignon salami spare ribs pork belly boudin. ', 'sendvic-sa-sirom.jpeg');
     INSERT INTO public.products (id, name, description, image) VALUES (11, 'Sendvič sa šunkom', 'Alcatra meatball filet mignon bresaola landjaeger, ham tenderloin chicken t-bone cow ham hock sausage fatback. Ground round cow ball tip ham venison beef ribs pork loin shank.', 'sendvic-sa-sunkom.jpeg');

docker-compose.yml

@@ -13,7 +13,7 @@ services:
             interval: 1s
             timeout: 5s
             retries: 10
-    machines-app:
+    machines-service:
         build:
             context: ./machines
             dockerfile: Dockerfile
@@ -23,8 +23,32 @@ services:
             - DBNAME=komponiranje
             - DBUSER=pero
             - DBPASSWORD=pero.000
-        ports:
-            - 3000:3000
+        # ports:
+        #     - 3000:3000
         depends_on:
             db:
                 condition: service_healthy
+    products-service:
+        build:
+            context: ./products
+            dockerfile: Dockerfile
+        environment:
+            - DBHOST=db
+            - DBPORT=5432
+            - DBNAME=komponiranje
+            - DBUSER=pero
+            - DBPASSWORD=pero.000
+        # ports:
+        #     - 3000:3000
+        depends_on:
+            db:
+                condition: service_healthy
+    proxy:
+        image: envoyproxy/envoy:v1.28-latest
+        ports:
+            - "10000:10000"
+        volumes:
+            - ./proxy/envoy.yaml:/etc/envoy/envoy.yaml
+        depends_on:
+            - machines-service
+            - products-service

machines/app/api/helpers.go

@@ -0,0 +1,37 @@
+package api
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+func isError(c *gin.Context, err error) bool {
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{
+			"details": err.Error(),
+		})
+		return true
+	}
+	return false
+}
+
+func raiseError(c *gin.Context, errCode int, message string) {
+	c.AbortWithStatusJSON(errCode, gin.H{
+		"details": message,
+	})
+}
+
+func raiseBadRequestError(c *gin.Context, message string) {
+	raiseError(c, http.StatusBadRequest, message)
+}
+
+func raiseNotFoundError(c *gin.Context, message string) {
+	raiseError(c, http.StatusNotFound, message)
+}
+
+func raiseInternalError(c *gin.Context, message string) {
+	c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{
+		"details": "Internal server error. We will we will fix it!",
+	})
+}

machines/app/api/router.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"machines/app/db"
 	"net/http"
+	"strconv"
 
 	"github.com/gin-gonic/gin"
 	"gorm.io/gorm"
@@ -24,24 +25,47 @@ func handlePing(c *gin.Context) {
 func handleGetMachines(dbConn *gorm.DB) gin.HandlerFunc {
 	return func(c *gin.Context) {
 		machines := db.GetMachines(dbConn)
-		fmt.Printf("%+v\n", machines)
 
 		c.JSON(
 			http.StatusOK,
 			GetMachinesResponse{
-				Machines: machines,
+				Machines: *machines,
 			},
 		)
 	}
 }
 
+func handleGetMachine(dbConn *gorm.DB) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		machineId, err := strconv.Atoi(c.Param("machineId"))
+		if err != nil {
+			raiseBadRequestError(c, "Invalid machineId parameter")
+			return
+		}
+
+		machine, err := db.GetMachine(dbConn, machineId)
+		if err != nil {
+			raiseNotFoundError(c, "Machine not found")
+			return
+		}
+
+		c.JSON(
+			http.StatusOK,
+			machine,
+		)
+	}
+}
+
 func initRouter(dbConn *gorm.DB) *gin.Engine {
 	gin.SetMode(gin.ReleaseMode)
 	router := gin.Default()
 
-	router.GET("/ping", handlePing)
-	router.GET("/", handleGetMachines(dbConn))
-	// routes.GET("/machines/:machineId", handleGetMachineDetails)
+	routes := router.Group("/machines")
+	{
+		routes.GET("/ping", handlePing)
+		routes.GET("", handleGetMachines(dbConn))
+		routes.GET("/:machineId", handleGetMachine(dbConn))
+	}
 
 	return router
 }

machines/app/db/repository.go

@@ -2,10 +2,21 @@ package db
 
 import "gorm.io/gorm"
 
-func GetMachines(dbConn *gorm.DB) []Machine {
+func GetMachines(dbConn *gorm.DB) *[]Machine {
 	var machines []Machine
 
 	dbConn.Order("name").Find(&machines)
 
-	return machines
+	return &machines
+}
+
+func GetMachine(dbConn *gorm.DB, id int) (*Machine, error) {
+	var machine Machine
+
+	result := dbConn.Order("name").Where("id = ?", id).First(&machine)
+	if result.Error != nil {
+		return nil, result.Error
+	}
+
+	return &machine, nil
 }

products/.air.toml

@@ -0,0 +1,37 @@
+root = "."
+testdata_dir = "testdata"
+tmp_dir = "tmp"
+
+[build]
+args_bin = []
+bin = "./tmp/main"
+cmd = "go build -o ./tmp/main ./app/."
+delay = 1000
+exclude_dir = ["assets", "tmp", "vendor", "testdata", "build"]
+exclude_file = []
+exclude_regex = ["_test.go"]
+exclude_unchanged = false
+follow_symlink = false
+full_bin = ""
+include_dir = []
+include_ext = ["go", "tpl", "tmpl", "html"]
+kill_delay = "0s"
+log = "build-errors.log"
+send_interrupt = false
+stop_on_error = true
+
+[color]
+app = ""
+build = "yellow"
+main = "magenta"
+runner = "green"
+watcher = "cyan"
+
+[log]
+time = false
+
+[misc]
+clean_on_exit = false
+
+[screen]
+clear_on_rebuild = false

products/.dockerignore

@@ -0,0 +1,3 @@
+**/build
+**/tmp
+**/.env*

products/.gitignore

@@ -0,0 +1,9 @@
+/.vscode
+/.idea
+
+/build
+/tmp
+
+/config.yaml
+/.env.production
+/main

products/Dockerfile

@@ -0,0 +1,20 @@
+# stage 2: build golang backend
+FROM golang:1.21-alpine3.19 as go-builder
+
+WORKDIR /go-builder
+COPY . .
+
+RUN \
+    go mod download && \
+    go mod verify && \
+    go build -v -ldflags "-s -w" -o products-app ./app/main.go
+
+
+# stage 2: build final container
+FROM alpine:3.19
+
+USER $USER
+WORKDIR /app
+COPY --from=go-builder /go-builder/products-app /app
+
+ENTRYPOINT ["/app/products-app"]

products/Makefile

@@ -0,0 +1,39 @@
+EXEC=products-app
+CONTAINER_NAME=products-app
+IMAGE_NAME=komponiranje-products-app
+
+
+run:
+	@air
+
+
+.PHONY: build
+build:
+	@go build -ldflags "-s -w" -o ./build/${EXEC} ./app/.
+
+
+upgrade-packages:
+	@go get -u ./...
+
+
+docker-build: clean
+	@docker build \
+		--progress=plain \
+		--tag $(IMAGE_NAME) \
+		.
+
+
+docker-run:
+	@docker run \
+		--name $(CONTAINER_NAME) \
+		--publish 3000:3000 \
+		--env CONTAINER_NAME="Awesome API server" \
+		--env DBPORT=55432 \
+		--detach \
+		$(IMAGE_NAME)
+
+
+clean:
+	- @docker stop $(CONTAINER_NAME)
+	- @docker rm $(CONTAINER_NAME)
+	- @docker rmi $(IMAGE_NAME)

products/app/api/dto.go

@@ -0,0 +1,5 @@
+package api
+
+type PingDto struct {
+	Message string `json:"message"`
+}

products/app/api/helpers.go

@@ -0,0 +1,37 @@
+package api
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+func isError(c *gin.Context, err error) bool {
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{
+			"details": err.Error(),
+		})
+		return true
+	}
+	return false
+}
+
+func raiseError(c *gin.Context, errCode int, message string) {
+	c.AbortWithStatusJSON(errCode, gin.H{
+		"details": message,
+	})
+}
+
+func raiseBadRequestError(c *gin.Context, message string) {
+	raiseError(c, http.StatusBadRequest, message)
+}
+
+func raiseNotFoundError(c *gin.Context, message string) {
+	raiseError(c, http.StatusNotFound, message)
+}
+
+func raiseInternalError(c *gin.Context, message string) {
+	c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{
+		"details": "Internal server error. We will we will fix it!",
+	})
+}

products/app/api/response.go

@@ -0,0 +1,7 @@
+package api
+
+import "products/app/db"
+
+type GetProductsResponse struct {
+	Products []db.Product `json:"products"`
+}

products/app/api/router.go

@@ -0,0 +1,78 @@
+package api
+
+import (
+	"fmt"
+	"net/http"
+	"products/app/db"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+const HOST = "0.0.0.0"
+const PORT = 3000
+
+func handlePing(c *gin.Context) {
+	c.JSON(
+		http.StatusOK,
+		PingDto{
+			Message: "Pong!",
+		},
+	)
+}
+
+func handleGetProducts(dbConn *gorm.DB) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		products := db.GetProducts(dbConn)
+
+		c.JSON(
+			http.StatusOK,
+			GetProductsResponse{
+				Products: *products,
+			},
+		)
+	}
+}
+
+func handleGetProduct(dbConn *gorm.DB) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		productId, err := strconv.Atoi(c.Param("productId"))
+		if err != nil {
+			raiseBadRequestError(c, "Invalid productId parameter")
+			return
+		}
+
+		product, err := db.GetProduct(dbConn, productId)
+		if err != nil {
+			raiseNotFoundError(c, "Product not found")
+			return
+		}
+
+		c.JSON(
+			http.StatusOK,
+			product,
+		)
+	}
+}
+
+func initRouter(dbConn *gorm.DB) *gin.Engine {
+	gin.SetMode(gin.ReleaseMode)
+	router := gin.Default()
+
+	routes := router.Group("/products")
+	{
+		routes.GET("/ping", handlePing)
+		routes.GET("", handleGetProducts(dbConn))
+		routes.GET("/:productId", handleGetProduct(dbConn))
+	}
+
+	return router
+}
+
+func Serve(dbConn *gorm.DB) {
+	serverAddr := fmt.Sprintf("%s:%d", HOST, PORT)
+
+	router := initRouter(dbConn)
+	router.Run(serverAddr)
+}

products/app/cfg/config.go

@@ -0,0 +1,24 @@
+package cfg
+
+import (
+	"github.com/kelseyhightower/envconfig"
+)
+
+type configStruct struct {
+	DbHost     string `default:"localhost"`
+	DbPort     int    `default:"55432"`
+	DbName     string `default:"komponiranje"`
+	DbUser     string `default:"pero"`
+	DbPassword string `default:"pero.000"`
+}
+
+const ENV_PREFIX = ""
+
+var Config configStruct
+
+func init() {
+	err := envconfig.Process(ENV_PREFIX, &Config)
+	if err != nil {
+		panic(err)
+	}
+}

products/app/db/db.go

@@ -0,0 +1,30 @@
+package db
+
+import (
+	"fmt"
+	"products/app/cfg"
+
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+	gormLogger "gorm.io/gorm/logger"
+)
+
+func ConnectDb() *gorm.DB {
+	var connectionString = fmt.Sprintf("postgres://%s:%s@%s:%d/%s?sslmode=disable",
+		cfg.Config.DbUser,
+		cfg.Config.DbPassword,
+		cfg.Config.DbHost,
+		cfg.Config.DbPort,
+		cfg.Config.DbName,
+	)
+
+	var err error
+	dbConn, err := gorm.Open(postgres.Open(connectionString), &gorm.Config{
+		Logger: gormLogger.Default.LogMode(gormLogger.Info),
+	})
+	if err != nil {
+		panic("Error connecting to database: " + err.Error())
+	}
+
+	return dbConn
+}

products/app/db/models.go

@@ -0,0 +1,12 @@
+package db
+
+type Product struct {
+	Id          int    `json:"id"`
+	Name        string `json:"name"`
+	Description string `json:"description"`
+	Image       string `json:"image"`
+}
+
+func (m *Product) TableName() string {
+	return "products"
+}

products/app/db/repository.go

@@ -0,0 +1,22 @@
+package db
+
+import "gorm.io/gorm"
+
+func GetProducts(dbConn *gorm.DB) *[]Product {
+	var products []Product
+
+	dbConn.Order("name").Find(&products)
+
+	return &products
+}
+
+func GetProduct(dbConn *gorm.DB, id int) (*Product, error) {
+	var product Product
+
+	result := dbConn.Order("name").Where("id = ?", id).First(&product)
+	if result.Error != nil {
+		return nil, result.Error
+	}
+
+	return &product, nil
+}

products/app/main.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"products/app/api"
+	"products/app/db"
+)
+
+func main() {
+	dbConn := db.ConnectDb()
+	api.Serve(dbConn)
+}

products/go.mod

@@ -0,0 +1,46 @@
+module products
+
+go 1.21.5
+
+require (
+	github.com/gin-gonic/gin v1.9.1
+	gorm.io/driver/postgres v1.5.4
+	gorm.io/gorm v1.25.5
+)
+
+require (
+	github.com/bytedance/sonic v1.9.1 // indirect
+	github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.2 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.14.0 // indirect
+	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20231201235250-de7065d80cb9 // indirect
+	github.com/jackc/pgx/v5 v5.5.1 // indirect
+	github.com/jackc/puddle/v2 v2.2.1 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/kelseyhightower/envconfig v1.4.0 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.4 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/leodido/go-urn v1.2.4 // indirect
+	github.com/mattn/go-isatty v0.0.19 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.8 // indirect
+	github.com/rogpeppe/go-internal v1.12.0 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.2.11 // indirect
+	golang.org/x/arch v0.3.0 // indirect
+	golang.org/x/crypto v0.18.0 // indirect
+	golang.org/x/net v0.10.0 // indirect
+	golang.org/x/sync v0.6.0 // indirect
+	golang.org/x/sys v0.16.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	google.golang.org/protobuf v1.30.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

products/go.sum

@@ -0,0 +1,114 @@
+github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1O2AihPM=
+github.com/bytedance/sonic v1.9.1 h1:6iJ6NqdoxCDr6mbY8h18oSO+cShGSMRGCEo7F2h0x8s=
+github.com/bytedance/sonic v1.9.1/go.mod h1:i736AoUSYt75HyZLoJW9ERYxcy6eaN6h4BZXU064P/U=
+github.com/chenzhuoyu/base64x v0.0.0-20211019084208-fb5309c8db06/go.mod h1:DH46F32mSOjUmXrMHnKwZdA8wcEefY7UVqBKYGjpdQY=
+github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 h1:qSGYFH7+jGhDF8vLC+iwCD4WpbV1EBDSzWkJODFLams=
+github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311/go.mod h1:b583jCggY9gE99b6G5LEC39OIiVsWj+R97kbl5odCEk=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gabriel-vasile/mimetype v1.4.2 h1:w5qFW6JKBz9Y393Y4q372O9A7cUSequkh1Q7OhCmWKU=
+github.com/gabriel-vasile/mimetype v1.4.2/go.mod h1:zApsH/mKG4w07erKIaJPFiX0Tsq9BFQgN3qGY5GnNgA=
+github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
+github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
+github.com/gin-gonic/gin v1.9.1 h1:4idEAncQnU5cB7BeOkPtxjfCSye0AAm1R0RVIqJ+Jmg=
+github.com/gin-gonic/gin v1.9.1/go.mod h1:hPrL7YrpYKXt5YId3A/Tnip5kqbEAP+KLuI3SUcPTeU=
+github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
+github.com/go-playground/assert/v2 v2.2.0/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
+github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA=
+github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY=
+github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY=
+github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
+github.com/go-playground/validator/v10 v10.14.0 h1:vgvQWe3XCz3gIeFDm/HnTIbj6UGmg/+t63MyGU2n5js=
+github.com/go-playground/validator/v10 v10.14.0/go.mod h1:9iXMNT7sEkjXb0I+enO7QXmzG6QCsPWY4zveKFVRSyU=
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proxy/envoy.yaml

@@ -0,0 +1,65 @@
+static_resources:
+  listeners:
+    - address:
+        socket_address:
+          address: 0.0.0.0
+          port_value: 10000
+      filter_chains:
+        - filters:
+            - name: envoy.filters.network.http_connection_manager
+              typed_config:
+                "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
+                codec_type: auto
+                stat_prefix: ingress_http
+                route_config:
+                  name: local_route
+                  virtual_hosts:
+                    - name: backend
+                      domains:
+                        - "*"
+                      routes:
+                        - match:
+                            prefix: "/machines"
+                          route:
+                            cluster: machines-app-service
+                        - match:
+                            prefix: "/products"
+                          route:
+                            cluster: products-app-service
+                http_filters:
+                  - name: envoy.filters.http.router
+                    typed_config:
+                      "@type": type.googleapis.com/envoy.extensions.filters.http.router.v3.Router
+  clusters:
+    - name: machines-app-service
+      connect_timeout: 0.25s
+      type: strict_dns
+      lb_policy: round_robin
+      load_assignment:
+        cluster_name: machines-app-service
+        endpoints:
+          - lb_endpoints:
+              - endpoint:
+                  address:
+                    socket_address:
+                      address: machines-service
+                      port_value: 3000
+    - name: products-app-service
+      connect_timeout: 0.25s
+      type: strict_dns
+      lb_policy: round_robin
+      load_assignment:
+        cluster_name: products-app-service
+        endpoints:
+          - lb_endpoints:
+              - endpoint:
+                  address:
+                    socket_address:
+                      address: products-service
+                      port_value: 3000
+admin:
+  access_log_path: "/dev/null"
+  address:
+    socket_address:
+      address: 0.0.0.0
+      port_value: 800