first commit

.gitignore

@@ -0,0 +1,69 @@
+# Packages #
+############
+# it's better to unpack these files and commit the raw source
+# git has its own built in compression methods
+*.7z
+*.dmg
+*.gz
+*.iso
+*.jar
+*.rar
+*.tar
+*.zip
+
+# Logs and databases #
+######################
+*.log
+*.sql
+*.sqlite
+
+# OS generated files #
+######################
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Vscode files
+.vscode
+
+# This is where the result of the go build goes
+/output*/
+/_output*/
+/_output
+
+# User cluster configs
+.kubeconfig
+*config*
+
+# yaml files
+*.yaml
+*.yml
+output.yaml
+
+#binary output 
+ecrcp
+
+# Releases
+#/releases/
+
+go-setup.md

go.mod

@@ -0,0 +1,20 @@
+module github.com/bit-cloner/ecrcp
+
+go 1.14
+
+require (
+	github.com/aws/aws-sdk-go v1.34.12
+	github.com/containerd/containerd v1.4.0 // indirect
+	github.com/docker/distribution v2.7.1+incompatible // indirect
+	github.com/docker/docker v17.12.0-ce-rc1.0.20200821074627-7ae5222c72cc+incompatible
+	github.com/docker/go-connections v0.4.0 // indirect
+	github.com/docker/go-units v0.4.0 // indirect
+	github.com/gogo/protobuf v1.3.1 // indirect
+	github.com/opencontainers/go-digest v1.0.0 // indirect
+	github.com/opencontainers/image-spec v1.0.1 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/sirupsen/logrus v1.6.0 // indirect
+	github.com/urfave/cli/v2 v2.2.0
+	golang.org/x/net v0.0.0-20200822124328-c89045814202 // indirect
+	google.golang.org/grpc v1.31.1 // indirect
+)

go.sum

@@ -0,0 +1,108 @@
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main.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+	"log"
+	"os"
+
+	"github.com/urfave/cli/v2"
+)
+
+func main() {
+	app := &cli.App{
+		Name:  "ecrcp",
+		Usage: "copy images from docker hub to AWS ECR",
+		Action: func(c *cli.Context) error {
+			// call function that pulls image from docker hub and pushed to ecr.
+			srcimage := c.Args().Get(0)
+			destimage := c.Args().Get(1)
+			pullpush(srcimage, destimage)
+			return nil
+		},
+	}
+
+	err := app.Run(os.Args)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+} // main function ends

pullpush.go

@@ -0,0 +1,133 @@
+package main
+
+import (
+	"context"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"strings"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/ecr"
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/client"
+)
+
+func pullpush(dockerimg string, ecrurl string) {
+
+	// check if cli has aws credentials
+	if os.Getenv("AWS_SECRET_ACCESS_KEY") == "" || os.Getenv("AWS_ACCESS_KEY_ID") == "" || os.Getenv("AWS_DEFAULT_REGION") == "" {
+		fmt.Println("AWS credentails not found. Set these credentials uisng aws configure or through environment variables")
+		fmt.Println("Make sure these variables are set and have appropriate permission for route53 AWS_SECRET_ACCESS_KEY AWS_ACCESS_KEY_ID AWS_DEFAULT_REGION")
+		fmt.Println("aborting..")
+		os.Exit(1)
+	}
+
+	// pull docker hub image
+	ctx := context.Background()
+	clnt, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println("Pulling image: ", dockerimg)
+	out, err := clnt.ImagePull(ctx, dockerimg, types.ImagePullOptions{})
+	if err != nil {
+		panic(err)
+	}
+
+	defer out.Close()
+
+	io.Copy(os.Stdout, out)
+
+	// Push to ecr location
+
+	//get credentials to login docker deamon into ecr repository
+	fmt.Println("Found AWS credentials")
+	sess := session.Must(session.NewSessionWithOptions(session.Options{
+		SharedConfigState: session.SharedConfigEnable,
+	}))
+	svc := ecr.New(sess)
+	input := &ecr.GetAuthorizationTokenInput{} // you can give ids of registry you want to login to . defaults to loging to default registry if not present
+	dockerconfig, err := svc.GetAuthorizationToken(input)
+	if err != nil {
+		fmt.Println(err.Error())
+		return
+	}
+	reftoken := dockerconfig.AuthorizationData[0].AuthorizationToken
+	token := *reftoken
+	decodedtoken, err := base64.StdEncoding.DecodeString(token)
+	password := string(decodedtoken)
+	password = strings.Replace(password, "AWS:", "", -1)
+	refendpoint := dockerconfig.AuthorizationData[0].ProxyEndpoint
+	endpoint := *refendpoint
+	fmt.Println("Got values for docker username and password to logon to ecr registry")
+	fmt.Println("Creating destination repository just in case it doesn't exist already")
+	// create destination repository
+	// extract repository name from ecr url
+	repo := between(ecrurl, "amazonaws.com/", ":")
+	fmt.Println("creating repo: ", repo)
+	repoinput := &ecr.CreateRepositoryInput{
+		RepositoryName:     aws.String(repo),
+		ImageTagMutability: aws.String("IMMUTABLE"),
+		ImageScanningConfiguration: &ecr.ImageScanningConfiguration{
+			ScanOnPush: aws.Bool(true)},
+	}
+	result, err := svc.CreateRepository(repoinput)
+	if err != nil {
+		fmt.Println(err)
+
+	}
+	fmt.Println(result)
+
+	fmt.Println("Tagging pulled image as: ", ecrurl)
+	// tag local image to remote repository
+	err1 := clnt.ImageTag(ctx, dockerimg, ecrurl)
+	if err1 != nil {
+		panic(err1)
+	}
+
+	// push image to ECR
+	fmt.Println("Pushing image to ECR repository")
+	auth := types.AuthConfig{
+		Username:      "AWS",
+		Password:      password,
+		ServerAddress: endpoint,
+	}
+	encodedJSON, err := json.Marshal(auth)
+	if err != nil {
+		panic(err)
+	}
+	authStr := base64.URLEncoding.EncodeToString(encodedJSON)
+
+	pushresult, err := clnt.ImagePush(ctx, ecrurl, types.ImagePushOptions{RegistryAuth: authStr})
+	if err != nil {
+		panic(err)
+	}
+	//Parse the responses of image push
+	responses, err := ioutil.ReadAll(pushresult)
+	fmt.Println(string(responses))
+
+	defer out.Close()
+
+}
+
+func between(value string, a string, b string) string {
+	// Get substring between two strings.
+	posFirst := strings.Index(value, a)
+	if posFirst == -1 {
+		return ""
+	}
+	posLast := strings.Index(value, b)
+	if posLast == -1 {
+		return ""
+	}
+	posFirstAdjusted := posFirst + len(a)
+	if posFirstAdjusted >= posLast {
+		return ""
+	}
+	return value[posFirstAdjusted:posLast]
+}