Expose tar_path command line option from Kaniko (#78)

* add digest as output variable for kaniko plugin

.drone.yml

@@ -77,14 +77,14 @@ steps:
       exclude:
       - pull_request
 
-- name: docker-kaniko-v1-8
+- name: docker-kaniko-v1-9
   image: plugins/docker
   settings:
     repo: plugins/kaniko
     auto_tag: true
-    auto_tag_suffix: linux-amd64-kaniko1.8.1
+    auto_tag_suffix: linux-amd64-kaniko1.9.1
     daemon_off: false
-    dockerfile: docker/docker/Dockerfile.linux.amd64.kaniko1.8.1
+    dockerfile: docker/docker/Dockerfile.linux.amd64.kaniko1.9.1
     username:
       from_secret: docker_username
     password:
@@ -94,14 +94,14 @@ steps:
       exclude:
       - pull_request
 
-- name: gcr-kaniko-v1-8
+- name: gcr-kaniko-v1-9
   image: plugins/docker
   settings:
     repo: plugins/kaniko-gcr
     auto_tag: true
-    auto_tag_suffix: linux-amd64-kaniko1.8.1
+    auto_tag_suffix: linux-amd64-kaniko1.9.1
     daemon_off: false
-    dockerfile: docker/gcr/Dockerfile.linux.amd64.kaniko1.8.1
+    dockerfile: docker/gcr/Dockerfile.linux.amd64.kaniko1.9.1
     username:
       from_secret: docker_username
     password:
@@ -112,14 +112,14 @@ steps:
       - pull_request
 
 
-- name: ecr-kaniko-v1-8
+- name: ecr-kaniko-v1-9
   image: plugins/docker
   settings:
     repo: plugins/kaniko-ecr
     auto_tag: true
-    auto_tag_suffix: linux-amd64-kaniko1.8.1
+    auto_tag_suffix: linux-amd64-kaniko1.9.1
     daemon_off: false
-    dockerfile: docker/ecr/Dockerfile.linux.amd64.kaniko1.8.1
+    dockerfile: docker/ecr/Dockerfile.linux.amd64.kaniko1.9.1
     username:
       from_secret: docker_username
     password:
@@ -130,12 +130,11 @@ steps:
       - pull_request
 ---
 kind: pipeline
-type: docker
+type: vm
 name: arm
 
-platform:
-  os: linux
-  arch: arm64
+pool:
+  use: ubuntu_arm64
 
 steps:
 - name: build
@@ -212,14 +211,14 @@ steps:
       exclude:
       - pull_request
 
-- name: docker-kaniko-v1-8
+- name: docker-kaniko-v1-9
   image: plugins/docker
   settings:
     repo: plugins/kaniko
     auto_tag: true
-    auto_tag_suffix: linux-arm64-kaniko1.8.1
+    auto_tag_suffix: linux-arm64-kaniko1.9.1
     daemon_off: false
-    dockerfile: docker/docker/Dockerfile.linux.arm64.kaniko1.8.1
+    dockerfile: docker/docker/Dockerfile.linux.arm64.kaniko1.9.1
     username:
       from_secret: docker_username
     password:
@@ -229,14 +228,14 @@ steps:
       exclude:
       - pull_request
 
-- name: gcr-kaniko-v1-8
+- name: gcr-kaniko-v1-9
   image: plugins/docker
   settings:
     repo: plugins/kaniko-gcr
     auto_tag: true
-    auto_tag_suffix: linux-arm64-kaniko1.8.1
+    auto_tag_suffix: linux-arm64-kaniko1.9.1
     daemon_off: false
-    dockerfile: docker/gcr/Dockerfile.linux.arm64.kaniko1.8.1
+    dockerfile: docker/gcr/Dockerfile.linux.arm64.kaniko1.9.1
     username:
       from_secret: docker_username
     password:
@@ -247,14 +246,14 @@ steps:
       - pull_request
 
 
-- name: ecr-kaniko-v1-8
+- name: ecr-kaniko-v1-9
   image: plugins/docker
   settings:
     repo: plugins/kaniko-ecr
     auto_tag: true
-    auto_tag_suffix: linux-arm64-kaniko1.8.1
+    auto_tag_suffix: linux-arm64-kaniko1.9.1
     daemon_off: false
-    dockerfile: docker/ecr/Dockerfile.linux.arm64.kaniko1.8.1
+    dockerfile: docker/ecr/Dockerfile.linux.arm64.kaniko1.9.1
     username:
       from_secret: docker_username
     password:
@@ -348,7 +347,7 @@ steps:
     ignore_missing: true
     password:
       from_secret: docker_password
-    spec: docker/docker/manifest-kaniko1.8.1.tmpl
+    spec: docker/docker/manifest-kaniko1.9.1.tmpl
     username:
       from_secret: docker_username
 
@@ -360,7 +359,7 @@ steps:
     ignore_missing: true
     password:
       from_secret: docker_password
-    spec: docker/gcr/manifest-kaniko1.8.1.tmpl
+    spec: docker/gcr/manifest-kaniko1.9.1.tmpl
     username:
       from_secret: docker_username
 
@@ -372,7 +371,7 @@ steps:
     ignore_missing: true
     password:
       from_secret: docker_password
-    spec: docker/ecr/manifest-kaniko1.8.1.tmpl
+    spec: docker/ecr/manifest-kaniko1.9.1.tmpl
     username:
       from_secret: docker_username
 

README.md

@@ -2,7 +2,7 @@
 
 Drone kaniko plugin uses [kaniko](https://github.com/GoogleContainerTools/kaniko) to build and publish Docker images to a container registry.
 
-Plugin images are published with 1.6.0 as well as 1.8.1 kaniko version from 1.5.1 release tag. `plugins/kaniko:<release-tag>` uses 1.6.0 version while `plugins/kaniko:<release-tag>-kaniko1.8.1` uses 1.8.1 version. Similar convention is used for plugins/kaniko-ecr & plugins/kaniko-gcr images as well.
+Plugin images are published with 1.6.0 as well as 1.9.1 kaniko version from 1.5.1 release tag. `plugins/kaniko:<release-tag>` uses 1.6.0 version while `plugins/kaniko:<release-tag>-kaniko1.9.1` uses 1.9.1 version. Similar convention is used for plugins/kaniko-ecr & plugins/kaniko-gcr images as well.
 
 ## Build
 

cmd/kaniko-acr/main.go

@@ -9,6 +9,7 @@ import (
 	"net/http"
 	"net/url"
 	"os"
+	"strings"
 
 	"github.com/Azure/azure-sdk-for-go/sdk/azcore/policy"
 	"github.com/Azure/azure-sdk-for-go/sdk/azidentity"
@@ -29,6 +30,7 @@ const (
 	certPathEnv        string = "AZURE_CLIENT_CERTIFICATE_PATH"
 	dockerConfigPath   string = "/kaniko/.docker"
 	defaultDigestFile  string = "/kaniko/digest-file"
+	finalUrl           string = "https://portal.azure.com/#view/Microsoft_Azure_ContainerRegistries/TagMetadataBlade/registryId/"
 )
 
 var (
@@ -139,6 +141,11 @@ func main() {
 			Usage:  "Azure Tenant Id",
 			EnvVar: "TENANT_ID",
 		},
+		cli.StringFlag{
+			Name:   "subscription-id",
+			Usage:  "Azure Subscription Id",
+			EnvVar: "SUBSCRIPTION_ID",
+		},
 		cli.StringFlag{
 			Name:   "client-id",
 			Usage:  "Azure Client Id",
@@ -210,11 +217,12 @@ func run(c *cli.Context) error {
 	registry := c.String("registry")
 	noPush := c.Bool("no-push")
 
-	err := createDockerConfig(
+	publicUrl, err := setupAuth(
 		c.String("tenant-id"),
 		c.String("client-id"),
 		c.String("client-cert"),
 		c.String("client-secret"),
+		c.String("subscription-id"),
 		registry,
 		noPush,
 	)
@@ -250,7 +258,7 @@ func run(c *cli.Context) error {
 		Artifact: kaniko.Artifact{
 			Tags:         c.StringSlice("tags"),
 			Repo:         c.String("repo"),
-			Registry:     c.String("registry"),
+			Registry:     publicUrl, // this is public url on which the artifact can be seen
 			ArtifactFile: c.String("artifact-file"),
 			RegistryType: artifact.Docker,
 		},
@@ -258,46 +266,45 @@ func run(c *cli.Context) error {
 	return plugin.Exec()
 }
 
-func createDockerConfig(tenantId, clientId, cert,
-	clientSecret, registry string, noPush bool) error {
+func setupAuth(tenantId, clientId, cert,
+	clientSecret, subscriptionId, registry string, noPush bool) (string, error) {
 	if registry == "" {
-		return fmt.Errorf("registry must be specified")
+		return "", fmt.Errorf("registry must be specified")
 	}
 
 	if noPush {
-		return nil
+		return "", nil
 	}
 
 	// case of client secret or cert based auth
 	if clientId != "" {
 		// only setup auth when pushing or credentials are defined
 
-		token, err := getACRToken(tenantId, clientId, clientSecret, cert, registry)
+		token, publicUrl, err := getACRToken(subscriptionId, tenantId, clientId, clientSecret, cert, registry)
 		if err != nil {
-			return errors.Wrap(err, "failed to fetch ACR Token")
+			return "", errors.Wrap(err, "failed to fetch ACR Token")
 		}
 		err = docker.CreateDockerCfgFile(username, token, registry, dockerConfigPath)
 		if err != nil {
-			return errors.Wrap(err, "failed to create docker config")
+			return "", errors.Wrap(err, "failed to create docker config")
 		}
+		return publicUrl, nil
 	} else {
-		return fmt.Errorf("managed authentication is not supported")
+		return "", fmt.Errorf("managed authentication is not supported")
 	}
-
-	return nil
 }
 
-func getACRToken(tenantId, clientId, clientSecret, cert, registry string) (string, error) {
+func getACRToken(subscriptionId, tenantId, clientId, clientSecret, cert, registry string) (string, string, error) {
 	if tenantId == "" {
-		return "", fmt.Errorf("tenantId can't be empty for AAD authentication")
+		return "", "", fmt.Errorf("tenantId can't be empty for AAD authentication")
 	}
 
 	if clientId == "" {
-		return "", fmt.Errorf("clientId can't be empty for AAD authentication")
+		return "", "", fmt.Errorf("clientId can't be empty for AAD authentication")
 	}
 
 	if clientSecret == "" && cert == "" {
-		return "", fmt.Errorf("one of client secret or cert should be defined")
+		return "", "", fmt.Errorf("one of client secret or cert should be defined")
 	}
 
 	// in case of authentication via cert
@@ -309,21 +316,22 @@ func getACRToken(tenantId, clientId, clientSecret, cert, registry string) (strin
 	}
 
 	if err := os.Setenv(clientIdEnv, clientId); err != nil {
-		return "", errors.Wrap(err, "failed to set env variable client Id")
+		return "", "", errors.Wrap(err, "failed to set env variable client Id")
 	}
 	if err := os.Setenv(clientSecretKeyEnv, clientSecret); err != nil {
-		return "", errors.Wrap(err, "failed to set env variable client secret")
+		return "", "", errors.Wrap(err, "failed to set env variable client secret")
 	}
 	if err := os.Setenv(tenantKeyEnv, tenantId); err != nil {
-		return "", errors.Wrap(err, "failed to set env variable tenant Id")
+		return "", "", errors.Wrap(err, "failed to set env variable tenant Id")
 	}
 	if err := os.Setenv(certPathEnv, ACRCertPath); err != nil {
-		return "", errors.Wrap(err, "failed to set env variable cert path")
+		return "", "", errors.Wrap(err, "failed to set env variable cert path")
 	}
 	env, err := azidentity.NewEnvironmentCredential(nil)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to get env credentials from azure")
+		return "", "", errors.Wrap(err, "failed to get env credentials from azure")
 	}
+
 	policy := policy.TokenRequestOptions{
 		Scopes: []string{"https://management.azure.com/.default"},
 	}
@@ -334,14 +342,20 @@ func getACRToken(tenantId, clientId, clientSecret, cert, registry string) (strin
 
 	azToken, err := env.GetToken(context.Background(), policy)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to fetch access token")
+		return "", "", errors.Wrap(err, "failed to fetch access token")
+	}
+
+	publicUrl, err := getPublicUrl(azToken.Token, registry, subscriptionId)
+	if err != nil {
+		// execution should not fail because of this error.
+		fmt.Fprintf(os.Stderr, "failed to get public url with error: %s\n", err)
 	}
 
 	ACRToken, err := fetchACRToken(tenantId, azToken.Token, registry)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to fetch ACR token")
+		return "", "", errors.Wrap(err, "failed to fetch ACR token")
 	}
-	return ACRToken, nil
+	return ACRToken, publicUrl, nil
 }
 
 func fetchACRToken(tenantId, token, registry string) (string, error) {
@@ -385,3 +399,48 @@ func setupACRCert(cert string) error {
 	}
 	return nil
 }
+
+func getPublicUrl(token, registryUrl, subscriptionId string) (string, error) {
+	// for backward compatibilty, if the subscription id is not defined, do not fail step.
+	if len(subscriptionId) == 0 {
+		return "", nil
+	}
+
+	registry := strings.Split(registryUrl, ".")[0]
+	burl := "https://management.azure.com/subscriptions/" +
+		subscriptionId + "/resources?$filter=resourceType%20eq%20'Microsoft.ContainerRegistry/registries'%20and%20name%20eq%20'" +
+		registry + "'&api-version=2021-04-01&$select=id"
+
+	method := "GET"
+	client := &http.Client{}
+	req, err := http.NewRequest(method, burl, nil)
+	if err != nil {
+		fmt.Println(err)
+		return "", errors.Wrap(err, "failed to create request for getting container registry setting")
+	}
+
+	req.Header.Add("Authorization", "Bearer "+token)
+	res, err := client.Do(req)
+	if err != nil {
+		fmt.Println(err)
+		return "", errors.Wrap(err, "failed to send request for getting container registry setting")
+	}
+	defer res.Body.Close()
+
+	var response strct
+	err = json.NewDecoder(res.Body).Decode(&response)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to send request for getting container registry setting")
+	}
+	return finalUrl + encodeParam(response.Value[0].ID), nil
+}
+
+func encodeParam(s string) string {
+	return url.QueryEscape(s)
+}
+
+type strct struct {
+	Value []struct {
+		ID string `json:"id"`
+	} `json:"value"`
+}

cmd/kaniko-docker/main.go

@@ -90,6 +90,11 @@ func main() {
 			Usage:  "enable auto generation of build tags",
 			EnvVar: "PLUGIN_AUTO_TAG",
 		},
+		cli.StringFlag{
+			Name:   "dockerconfig",
+			Usage:  "docker json dockerconfig",
+			EnvVar: "PLUGIN_CONFIG",
+		},
 		cli.StringFlag{
 			Name:   "auto-tag-suffix",
 			Usage:  "the suffix of auto build tags",
@@ -171,6 +176,11 @@ func main() {
 			Usage:  "Set this flag if you only want to build the image, without pushing to a registry",
 			EnvVar: "PLUGIN_NO_PUSH",
 		},
+		cli.StringFlag{
+			Name:   "tar-path",
+			Usage:  "Set this flag to save the image as a tarball at path",
+			EnvVar: "PLUGIN_TAR_PATH",
+		},
 		cli.StringFlag{
 			Name:   "verbosity",
 			Usage:  "Set this flag with value as oneof <panic|fatal|error|warn|info|debug|trace> to set the logging level for kaniko. Defaults to info.",
@@ -186,6 +196,11 @@ func main() {
 			Usage:  "build only used stages",
 			EnvVar: "PLUGIN_SKIP_UNUSED_STAGES",
 		},
+		cli.StringFlag{
+			Name:   "output-file",
+			Usage:  "Output file location that will be generated by the plugin. This file will include information of the output that are exported by the plugin.",
+			EnvVar: "DRONE_OUTPUT",
+		},
 	}
 
 	if err := app.Run(os.Args); err != nil {
@@ -196,9 +211,15 @@ func main() {
 func run(c *cli.Context) error {
 	username := c.String("username")
 	noPush := c.Bool("no-push")
+	configOverride := c.String("dockerconfig")
 
-	// only setup auth when pushing or credentials are defined
-	if !noPush || username != "" {
+	// if configOverride is provided, use this for docker auth
+	if len(configOverride) > 0 {
+		if err := writeDockerCfgFile([]byte(configOverride)); err != nil {
+			return err
+		}
+	} else if !noPush || username != "" {
+		// setup auth when pushing or credentials are defined and docker config override is false
 		if err := createDockerCfgFile(username, c.String("password"), c.String("registry")); err != nil {
 			return err
 		}
@@ -226,6 +247,7 @@ func run(c *cli.Context) error {
 			CacheTTL:         c.Int("cache-ttl"),
 			DigestFile:       defaultDigestFile,
 			NoPush:           noPush,
+			TarPath:          c.String("tar-path"),
 			Verbosity:        c.String("verbosity"),
 			Platform:         c.String("platform"),
 			SkipUnusedStages: c.Bool("skip-unused-stages"),
@@ -237,6 +259,9 @@ func run(c *cli.Context) error {
 			ArtifactFile: c.String("artifact-file"),
 			RegistryType: artifact.Docker,
 		},
+		Output: kaniko.Output{
+			OutputFile: c.String("output-file"),
+		},
 	}
 	return plugin.Exec()
 }
@@ -259,14 +284,22 @@ func createDockerCfgFile(username, password, registry string) error {
 		registry = v1RegistryURL
 	}
 
+	authBytes := []byte(fmt.Sprintf("%s:%s", username, password))
+	encodedString := base64.StdEncoding.EncodeToString(authBytes)
+	jsonBytes := []byte(fmt.Sprintf(`{"auths": {"%s": {"auth": "%s"}}}`, registry, encodedString))
+
+	if err := writeDockerCfgFile(jsonBytes); err != nil {
+		return errors.Wrap(err, "failed to write docker config file")
+	}
+	return nil
+}
+
+// Write json bytes in the docker config file
+func writeDockerCfgFile(jsonBytes []byte) error {
 	err := os.MkdirAll(dockerPath, 0600)
 	if err != nil {
 		return errors.Wrap(err, fmt.Sprintf("failed to create %s directory", dockerPath))
 	}
-
-	authBytes := []byte(fmt.Sprintf("%s:%s", username, password))
-	encodedString := base64.StdEncoding.EncodeToString(authBytes)
-	jsonBytes := []byte(fmt.Sprintf(`{"auths": {"%s": {"auth": "%s"}}}`, registry, encodedString))
 	err = ioutil.WriteFile(dockerConfigPath, jsonBytes, 0644)
 	if err != nil {
 		return errors.Wrap(err, "failed to create docker config file")

cmd/kaniko-ecr/main.go

@@ -64,6 +64,11 @@ func main() {
 			Value:  "Dockerfile",
 			EnvVar: "PLUGIN_DOCKERFILE",
 		},
+		cli.StringFlag{
+			Name:   "docker-registry",
+			Usage:  "docker registry",
+			EnvVar: "PLUGIN_DOCKER_REGISTRY,DOCKER_REGISTRY",
+		},
 		cli.StringFlag{
 			Name:   "docker-username",
 			Usage:  "docker username",
@@ -242,6 +247,7 @@ func run(c *cli.Context) error {
 	noPush := c.Bool("no-push")
 
 	dockerConfig, err := createDockerConfig(
+		c.String("docker-registry"),
 		c.String("docker-username"),
 		c.String("docker-password"),
 		c.String("access-key"),
@@ -328,12 +334,16 @@ func run(c *cli.Context) error {
 	return plugin.Exec()
 }
 
-func createDockerConfig(dockerUsername, dockerPassword, accessKey, secretKey,
+func createDockerConfig(dockerRegistry, dockerUsername, dockerPassword, accessKey, secretKey,
 	registry, assumeRole, externalId, region string, noPush bool) (*docker.Config, error) {
 	dockerConfig := docker.NewConfig()
 
 	if dockerUsername != "" {
-		dockerConfig.SetAuth(docker.RegistryV1, dockerUsername, dockerPassword)
+		// if no docker registry provided, use dockerhub by default
+		if len(dockerRegistry) == 0 {
+			dockerRegistry = docker.RegistryV1
+		}
+		dockerConfig.SetAuth(dockerRegistry, dockerUsername, dockerPassword)
 	}
 
 	if assumeRole != "" {
@@ -469,7 +479,7 @@ func getAssumeRoleCreds(region, roleArn, externalId, roleSessionName string) (st
 
 	username, password, registry, err := getAuthInfo(svc)
 	if err != nil {
-		return "", "", "", errors.Wrap(err, "failed to get ECR auth")
+		return "", "", "", errors.Wrap(err, "failed to get ECR auth: no basic auth credentials")
 	}
 	return username, password, registry, nil
 }

cmd/kaniko-ecr/main_test.go

@@ -10,6 +10,7 @@ import (
 
 func TestCreateDockerConfig(t *testing.T) {
 	got, err := createDockerConfig(
+		"",
 		"docker-username",
 		"docker-password",
 		"access-key",
@@ -34,10 +35,37 @@ func TestCreateDockerConfig(t *testing.T) {
 	}
 }
 
+func TestCreateDockerConfigFromGivenRegistry(t *testing.T) {
+	got, err := createDockerConfig(
+		"docker-registry",
+		"docker-username",
+		"docker-password",
+		"access-key",
+		"secret-key",
+		"ecr-registry",
+		"",
+		"",
+		"",
+		false,
+	)
+	if err != nil {
+		t.Error("failed to create docker config")
+	}
+
+	want := docker.NewConfig()
+	want.SetAuth("docker-registry", "docker-username", "docker-password")
+	want.SetCredHelper(docker.RegistryECRPublic, "ecr-login")
+	want.SetCredHelper("ecr-registry", "ecr-login")
+	if !reflect.DeepEqual(want, got) {
+		t.Errorf("not equal:\n  want: %#v\n   got: %#v", want, got)
+	}
+}
+
 func TestCreateDockerConfigKanikoOneDotEight(t *testing.T) {
 	os.Setenv(kanikoVersionEnv, "1.8.1")
 	defer os.Setenv(kanikoVersionEnv, "")
 	got, err := createDockerConfig(
+		"",
 		"docker-username",
 		"docker-password",
 		"access-key",

docker/acr/Dockerfile.linux.amd64

@@ -1,5 +1,5 @@
-FROM gcr.io/kaniko-project/executor
+FROM gcr.io/kaniko-project/executor:v1.9.1
 
-ENV KANIKO_VERSION=1.8.1
+ENV KANIKO_VERSION=1.9.1
 ADD release/linux/amd64/kaniko-acr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-acr"]

docker/acr/Dockerfile.linux.arm64

@@ -1,8 +1,8 @@
-FROM gcr.io/kaniko-project/executor:v1.8.1
+FROM gcr.io/kaniko-project/executor:v1.9.1
 
 ENV HOME /root
 ENV USER root
 
-ENV KANIKO_VERSION=1.8.1
+ENV KANIKO_VERSION=1.9.1
 ADD release/linux/arm64/kaniko-acr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-acr"]

docker/acr/manifest.tmpl

@@ -1,4 +1,4 @@
-image: plugins/kaniko:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}latest{{/if}}
+image: plugins/kaniko-acr:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}latest{{/if}}
 {{#if build.tags}}
 tags:
 {{#each build.tags}}
@@ -7,12 +7,12 @@ tags:
 {{/if}}
 manifests:
   -
-    image: plugins/kaniko:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64
+    image: plugins/kaniko-acr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64
     platform:
       architecture: amd64
       os: linux
   -
-    image: plugins/kaniko:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64
+    image: plugins/kaniko-acr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64
     platform:
       architecture: arm64
       os: linux

docker/docker/Dockerfile.linux.amd64

@@ -1,5 +1,5 @@
-FROM gcr.io/kaniko-project/executor:v1.6.0
+FROM gcr.io/kaniko-project/executor:v1.9.1
 
-ENV KANIKO_VERSION=1.6.0
+ENV KANIKO_VERSION=1.9.1
 ADD release/linux/amd64/kaniko-docker /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-docker"]

docker/docker/Dockerfile.linux.amd64.kaniko1.9.1

@@ -1,5 +1,5 @@
-FROM gcr.io/kaniko-project/executor:v1.8.1
+FROM gcr.io/kaniko-project/executor:v1.9.1
 
-ENV KANIKO_VERSION=1.8.1
+ENV KANIKO_VERSION=1.9.1
 ADD release/linux/amd64/kaniko-docker /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-docker"]

docker/docker/Dockerfile.linux.arm64

@@ -1,8 +1,8 @@
-FROM gcr.io/kaniko-project/executor:v1.6.0
+FROM gcr.io/kaniko-project/executor:v1.9.1
 
 ENV HOME /root
 ENV USER root
 
-ENV KANIKO_VERSION=1.6.0
+ENV KANIKO_VERSION=1.9.1
 ADD release/linux/arm64/kaniko-docker /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-docker"]

docker/docker/Dockerfile.linux.arm64.kaniko1.9.1

@@ -1,5 +1,5 @@
-FROM gcr.io/kaniko-project/executor:v1.8.1
+FROM gcr.io/kaniko-project/executor:v1.9.1
 
-ENV KANIKO_VERSION=1.8.1
+ENV KANIKO_VERSION=1.9.1
 ADD release/linux/arm64/kaniko-docker /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-docker"]

docker/docker/manifest-kaniko1.9.1.tmpl

@@ -1,4 +1,4 @@
-image: plugins/kaniko:{{#if build.tag}}{{trimPrefix "v" build.tag}}-kaniko1.8.1{{else}}latest-kaniko1.8.1{{/if}}
+image: plugins/kaniko:{{#if build.tag}}{{trimPrefix "v" build.tag}}-kaniko1.9.1{{else}}latest-kaniko1.9.1{{/if}}
 {{#if build.tags}}
 tags:
 {{#each build.tags}}
@@ -7,12 +7,12 @@ tags:
 {{/if}}
 manifests:
   -
-    image: plugins/kaniko:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64-kaniko1.8.1
+    image: plugins/kaniko:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64-kaniko1.9.1
     platform:
       architecture: amd64
       os: linux
   -
-    image: plugins/kaniko:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64-kaniko1.8.1
+    image: plugins/kaniko:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64-kaniko1.9.1
     platform:
       architecture: arm64
       os: linux

docker/ecr/Dockerfile.linux.amd64

@@ -1,5 +1,5 @@
-FROM gcr.io/kaniko-project/executor:v1.6.0
+FROM gcr.io/kaniko-project/executor:v1.9.1
 
-ENV KANIKO_VERSION=1.6.0
+ENV KANIKO_VERSION=1.9.1
 ADD release/linux/amd64/kaniko-ecr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-ecr"]

docker/ecr/Dockerfile.linux.amd64.kaniko1.9.1

@@ -1,5 +1,5 @@
-FROM gcr.io/kaniko-project/executor:v1.8.1
+FROM gcr.io/kaniko-project/executor:v1.9.1
 
-ENV KANIKO_VERSION=1.8.1
+ENV KANIKO_VERSION=1.9.1
 ADD release/linux/amd64/kaniko-ecr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-ecr"]

docker/ecr/Dockerfile.linux.arm64

@@ -1,8 +1,8 @@
-FROM gcr.io/kaniko-project/executor:v1.6.0
+FROM gcr.io/kaniko-project/executor:v1.9.1
 
 ENV HOME /root
 ENV USER root
-ENV KANIKO_VERSION=1.6.0
+ENV KANIKO_VERSION=1.9.1
 
 ADD release/linux/arm64/kaniko-ecr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-ecr"]

docker/ecr/Dockerfile.linux.arm64.kaniko1.9.1

@@ -1,5 +1,5 @@
-FROM gcr.io/kaniko-project/executor:v1.8.1
+FROM gcr.io/kaniko-project/executor:v1.9.1
 
-ENV KANIKO_VERSION=1.8.1
+ENV KANIKO_VERSION=1.9.1
 ADD release/linux/arm64/kaniko-ecr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-ecr"]

docker/ecr/manifest-kaniko1.9.1.tmpl

@@ -1,4 +1,4 @@
-image: plugins/kaniko-ecr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-kaniko1.8.1{{else}}latest-kaniko1.8.1{{/if}}
+image: plugins/kaniko-ecr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-kaniko1.9.1{{else}}latest-kaniko1.9.1{{/if}}
 {{#if build.tags}}
 tags:
 {{#each build.tags}}
@@ -7,12 +7,12 @@ tags:
 {{/if}}
 manifests:
   -
-    image: plugins/kaniko-ecr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64-kaniko1.8.1
+    image: plugins/kaniko-ecr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64-kaniko1.9.1
     platform:
       architecture: amd64
       os: linux
   -
-    image: plugins/kaniko-ecr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64-kaniko1.8.1
+    image: plugins/kaniko-ecr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64-kaniko1.9.1
     platform:
       architecture: arm64
       os: linux

docker/gcr/Dockerfile.linux.amd64

@@ -1,5 +1,5 @@
-FROM gcr.io/kaniko-project/executor:v1.6.0
+FROM gcr.io/kaniko-project/executor:v1.9.1
 
-ENV KANIKO_VERSION=1.6.0
+ENV KANIKO_VERSION=1.9.1
 ADD release/linux/amd64/kaniko-gcr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-gcr"]

docker/gcr/Dockerfile.linux.amd64.kaniko1.9.1

@@ -1,5 +1,5 @@
-FROM gcr.io/kaniko-project/executor:v1.8.1
+FROM gcr.io/kaniko-project/executor:v1.9.1
 
-ENV KANIKO_VERSION=1.8.1
+ENV KANIKO_VERSION=1.9.1
 ADD release/linux/amd64/kaniko-gcr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-gcr"]

docker/gcr/Dockerfile.linux.arm64

@@ -1,8 +1,8 @@
-FROM gcr.io/kaniko-project/executor:v1.6.0
+FROM gcr.io/kaniko-project/executor:v1.9.1
 
 ENV HOME /root
 ENV USER root
-ENV KANIKO_VERSION=1.6.0
+ENV KANIKO_VERSION=1.9.1
 
 ADD release/linux/arm64/kaniko-gcr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-gcr"]

docker/gcr/Dockerfile.linux.arm64.kaniko1.9.1

@@ -1,5 +1,5 @@
-FROM gcr.io/kaniko-project/executor:v1.8.1
+FROM gcr.io/kaniko-project/executor:v1.9.1
 
-ENV KANIKO_VERSION=1.8.1
+ENV KANIKO_VERSION=1.9.1
 ADD release/linux/arm64/kaniko-gcr /kaniko/
 ENTRYPOINT ["/kaniko/kaniko-gcr"]

docker/gcr/manifest-kaniko1.9.1.tmpl

@@ -1,4 +1,4 @@
-image: plugins/kaniko-gcr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-kaniko1.8.1{{else}}latest-kaniko1.8.1{{/if}}
+image: plugins/kaniko-gcr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-kaniko1.9.1{{else}}latest-kaniko1.9.1{{/if}}
 {{#if build.tags}}
 tags:
 {{#each build.tags}}
@@ -7,12 +7,12 @@ tags:
 {{/if}}
 manifests:
   -
-    image: plugins/kaniko-gcr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64-kaniko1.8.1
+    image: plugins/kaniko-gcr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64-kaniko1.9.1
     platform:
       architecture: amd64
       os: linux
   -
-    image: plugins/kaniko-gcr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64-kaniko1.8.1
+    image: plugins/kaniko-gcr:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64-kaniko1.9.1
     platform:
       architecture: arm64
       os: linux

kaniko.go

@@ -8,6 +8,7 @@ import (
 	"strings"
 
 	"github.com/drone/drone-kaniko/pkg/artifact"
+	"github.com/drone/drone-kaniko/pkg/output"
 	"github.com/drone/drone-kaniko/pkg/tagger"
 	"golang.org/x/mod/semver"
 )
@@ -38,6 +39,7 @@ type (
 		Verbosity        string   // Log level
 		Platform         string   // Allows to build with another default platform than the host, similarly to docker build --platform
 		SkipUnusedStages bool     // Build only used stages
+		TarPath          string   // Set this flag to save the image as a tarball at path
 	}
 
 	// Artifact defines content of artifact file
@@ -49,10 +51,16 @@ type (
 		ArtifactFile string                    // Artifact file location
 	}
 
+	// Output defines content of output file
+	Output struct {
+		OutputFile string // File where plugin output are saved
+	}
+
 	// Plugin defines the Docker plugin parameters.
 	Plugin struct {
 		Build    Build    // Docker build configuration
 		Artifact Artifact // Artifact file content
+		Output   Output   // Output file content
 	}
 )
 
@@ -148,14 +156,15 @@ func (p Plugin) Exec() error {
 		fmt.Sprintf("--context=dir://%s", p.Build.Context),
 	}
 
-	// Set the destination repository
-	if !p.Build.NoPush {
+	// Set the destination repository only when we push or save to tarball
+	if !p.Build.NoPush || p.Build.TarPath != "" {
 		for _, tag := range tags {
 			for _, label := range p.Build.labelsForTag(tag) {
 				cmdArgs = append(cmdArgs, fmt.Sprintf("--destination=%s:%s", p.Build.Repo, label))
 			}
 		}
 	}
+
 	// Set the build arguments
 	for _, arg := range p.Build.Args {
 		cmdArgs = append(cmdArgs, fmt.Sprintf("--build-arg=%s", arg))
@@ -212,6 +221,10 @@ func (p Plugin) Exec() error {
 		cmdArgs = append(cmdArgs, "--skip-unused-stages")
 	}
 
+	if p.Build.TarPath != "" {
+		cmdArgs = append(cmdArgs, fmt.Sprintf("--tar-path=%s", p.Build.TarPath))
+	}
+	
 	cmd := exec.Command("/kaniko/executor", cmdArgs...)
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr
@@ -223,19 +236,29 @@ func (p Plugin) Exec() error {
 	}
 
 	if p.Build.DigestFile != "" && p.Artifact.ArtifactFile != "" {
-		content, err := ioutil.ReadFile(p.Build.DigestFile)
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "failed to read digest file contents at path: %s with error: %s\n", p.Build.DigestFile, err)
-		}
-		err = artifact.WritePluginArtifactFile(p.Artifact.RegistryType, p.Artifact.ArtifactFile, p.Artifact.Registry, p.Artifact.Repo, string(content), p.Artifact.Tags)
+		err = artifact.WritePluginArtifactFile(p.Artifact.RegistryType, p.Artifact.ArtifactFile, p.Artifact.Registry, p.Artifact.Repo, getDigest(p.Build.DigestFile), p.Artifact.Tags)
 		if err != nil {
 			fmt.Fprintf(os.Stderr, "failed to write plugin artifact file at path: %s with error: %s\n", p.Artifact.ArtifactFile, err)
 		}
 	}
 
+	if p.Output.OutputFile != "" {
+		if err = output.WritePluginOutputFile(p.Output.OutputFile, getDigest(p.Build.DigestFile)); err != nil {
+			fmt.Fprintf(os.Stderr, "failed to write plugin output file at path: %s with error: %s\n", p.Output.OutputFile, err)
+		}
+	}
+
 	return nil
 }
 
+func getDigest(digestFile string) string {
+	content, err := ioutil.ReadFile(digestFile)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "failed to read digest file contents at path: %s with error: %s\n", digestFile, err)
+	}
+	return string(content)
+}
+
 // trace writes each command to stdout with the command wrapped in an xml
 // tag so that it can be extracted and displayed in the logs.
 func trace(cmd *exec.Cmd) {

kaniko_test.go

@@ -100,7 +100,16 @@ func TestBuild_AutoTags(t *testing.T) {
 			},
 		},
 		{
-			name:          "tag push",
+			name:          "beta tag push",
+			repoBranch:    "master",
+			commitRef:     "refs/tags/v1.0.0-beta.1",
+			autoTagSuffix: "",
+			expectedTags: []string{
+				"1.0.0-beta.1",
+			},
+		},
+		{
+			name:          "tag push with suffix",
 			repoBranch:    "master",
 			commitRef:     "refs/tags/v1.0.0",
 			autoTagSuffix: "linux-amd64",

pkg/output/output.go

@@ -0,0 +1,12 @@
+package output
+
+import (
+	"github.com/joho/godotenv"
+)
+
+func WritePluginOutputFile(outputFilePath, digest string) error {
+	output := map[string]string{
+		"digest": digest,
+	}
+	return godotenv.Write(output, outputFilePath)
+}