Squashed 'release-tools/' changes from 4cf843f..a0f195c

a0f195c Merge pull request kubernetes-csi#106 from msau42/fix-canary 7100c12 Only set staging registry when running canary job b3c65f9 Merge pull request kubernetes-csi#99 from msau42/add-release-process e53f3e8 Merge pull request kubernetes-csi#103 from msau42/fix-canary d129462 Document new method for adding CI jobs are new K8s versions e73c2ce Use staging registry for canary tests 2c09846 Add cleanup instructions to release-notes generation 60e1cd3 Merge pull request kubernetes-csi#98 from pohly/kubernetes-1-19-fixes 0979c09 prow.sh: fix E2E suite for Kubernetes >= 1.18 3b4a2f1 prow.sh: fix installing Go for Kubernetes 1.19.0 1fbb636 Merge pull request kubernetes-csi#97 from pohly/go-1.15 82d108a switch to Go 1.15 d8a2530 Merge pull request kubernetes-csi#95 from msau42/add-release-process 843bddc Add steps on promoting release images 0345a83 Merge pull request kubernetes-csi#94 from linux-on-ibm-z/bump-timeout 1fdf2d5 cloud build: bump timeout in Prow job 41ec6d1 Merge pull request kubernetes-csi#93 from animeshk08/patch-1 5a54e67 filter-junit: Fix gofmt error 0676fcb Merge pull request kubernetes-csi#92 from animeshk08/patch-1 36ea4ff filter-junit: Fix golint error f5a4203 Merge pull request kubernetes-csi#91 from cyb70289/arm64 43e50d6 prow.sh: enable building arm64 image 0d5bd84 Merge pull request kubernetes-csi#90 from pohly/k8s-staging-sig-storage 3df86b7 cloud build: k8s-staging-sig-storage c5fd961 Merge pull request kubernetes-csi#89 from pohly/cloud-build-binfmt db0c2a7 cloud build: initialize support for running commands in Dockerfile be902f4 Merge pull request kubernetes-csi#88 from pohly/multiarch-windows-fix 340e082 build.make: optional inclusion of Windows in multiarch images 5231f05 build.make: properly declare push-multiarch 4569f27 build.make: fix push-multiarch ambiguity 17dde9e Merge pull request kubernetes-csi#87 from pohly/cloud-build bd41690 cloud build: initial set of shared files 9084fec Merge pull request kubernetes-csi#81 from msau42/add-release-process 6f2322e Update patch release notes generation command 0fcc3b1 Merge pull request kubernetes-csi#78 from ggriffiths/fix_csi_snapshotter_rbac_version_set d8c76fe Support local snapshot RBAC for pull jobs c1bdf5b Merge pull request kubernetes-csi#80 from msau42/add-release-process ea1f94a update release tools instructions 152396e Merge pull request kubernetes-csi#77 from ggriffiths/snapshotter201_update 7edc146 Update snapshotter to version 2.0.1 git-subtree-dir: release-tools git-subtree-split: a0f195cc2ddc2a1f07d4d3e46fc08187db358f94
fengzixu · Oct 12, 2020 · 63ae26b · 63ae26b
1 parent 4cf843f
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diff --git a/SIDECAR_RELEASE_PROCESS.md b/SIDECAR_RELEASE_PROCESS.md
@@ -39,29 +39,39 @@ naming convention `<hostpath-deployment-version>-on-<kubernetes-version>`.
 1. Changes can then be updated in all the sidecar repos and hostpath driver repo
    by following the [update
    instructions](https://github.com/kubernetes-csi/csi-release-tools/blob/master/README.md#sharing-and-updating).
-1. New pull and CI jobs are configured by
+1. New pull and CI jobs are configured by adding new K8s versions to the top of
    [gen-jobs.sh](https://github.com/kubernetes/test-infra/blob/master/config/jobs/kubernetes-csi/gen-jobs.sh).
-   New pull jobs that have been unverified should be initially made optional.
-   [Example](https://github.com/kubernetes/test-infra/pull/15055)
+   New pull jobs that have been unverified should be initially made optional by
+   setting the new K8s version as
+   [experimental](https://github.com/kubernetes/test-infra/blob/a1858f46d6014480b130789df58b230a49203a64/config/jobs/kubernetes-csi/gen-jobs.sh#L40).
 1. Once new pull and CI jobs have been verified, and the new Kubernetes version
    is released, we can make the optional jobs required, and also remove the
    Kubernetes versions that are no longer supported.
 
 ## Release Process
 1. Identify all issues and ongoing PRs that should go into the release, and
   drive them to resolution.
-1. Download [K8s release notes
+1. Download v2.8+ [K8s release notes
   generator](https://github.com/kubernetes/release/tree/master/cmd/release-notes)
 1. Generate release notes for the release. Replace arguments with the relevant
   information.
-    ```
-    GITHUB_TOKEN=<token> ./release-notes --start-sha=0ed6978fd199e3ca10326b82b4b8b8e916211c9b --end-sha=3cb3d2f18ed8cb40371c6d8886edcabd1f27e7b9 \
-    --github-org=kubernetes-csi --github-repo=external-attacher -branch=master -output out.md
-    ```
-    * `--start-sha` should point to the last release from the same branch. For
-    example:
-        * `1.X-1.0` tag when releasing `1.X.0`
-        * `1.X.Y-1` tag when releasing `1.X.Y`
+    * Clean up old cached information (also needed if you are generating release
+      notes for multiple repos)
+      ```bash
+      rm -rf /tmp/k8s-repo
+      ```
+    * For new minor releases on master:
+        ```bash
+        GITHUB_TOKEN=<token> release-notes --discover=mergebase-to-latest
+        --github-org=kubernetes-csi --github-repo=external-provisioner
+        --required-author="" --output out.md
+        ```
+    * For new patch releases on a release branch:
+        ```bash
+        GITHUB_TOKEN=<token> release-notes --discover=patch-to-latest --branch=release-1.1
+        --github-org=kubernetes-csi --github-repo=external-provisioner
+        --required-author="" --output out.md
+        ```
 1. Compare the generated output to the new commits for the release to check if
    any notable change missed a release note.
 1. Reword release notes as needed. Make sure to check notes for breaking
@@ -82,6 +92,12 @@ naming convention `<hostpath-deployment-version>-on-<kubernetes-version>`.
    [external-provisioner example](https://github.com/kubernetes-csi/external-provisioner/releases/new)
 1. If release was a new major/minor version, create a new `release-<minor>`
    branch at that commit.
+1. Check [image build status](https://k8s-testgrid.appspot.com/sig-storage-image-build).
+1. Promote images from k8s-staging-sig-storage to k8s.gcr.io/sig-storage. From
+   the [k8s image
+   repo](https://github.com/kubernetes/k8s.io/tree/master/k8s.gcr.io/images/k8s-staging-sig-storage),
+   run `./generate.sh > images.yaml`, and send a PR with the updated images.
+   Once merged, the image promoter will copy the images from staging to prod.
 1. Update [kubernetes-csi/docs](https://github.com/kubernetes-csi/docs) sidecar
    and feature pages with the new released version.
 1. After all the sidecars have been released, update

diff --git a/build.make b/build.make
@@ -71,7 +71,7 @@ BUILD_PLATFORMS =
 
 # This builds each command (= the sub-directories of ./cmd) for the target platform(s)
 # defined by BUILD_PLATFORMS.
-build-%: check-go-version-go
+$(CMDS:%=build-%): build-%: check-go-version-go
 	mkdir -p bin
 	echo '$(BUILD_PLATFORMS)' | tr ';' '\n' | while read -r os arch suffix; do \
 		if ! (set -x; CGO_ENABLED=0 GOOS="$$os" GOARCH="$$arch" go build $(GOFLAGS_VENDOR) -a -ldflags '-X main.version=$(REV) -extldflags "-static"' -o "./bin/$*$$suffix" ./cmd/$*); then \
@@ -80,10 +80,10 @@ build-%: check-go-version-go
 		fi; \
 	done
 
-container-%: build-%
+$(CMDS:%=container-%): container-%: build-%
 	docker build -t $*:latest -f $(shell if [ -e ./cmd/$*/Dockerfile ]; then echo ./cmd/$*/Dockerfile; else echo Dockerfile; fi) --label revision=$(REV) .
 
-push-%: container-%
+$(CMDS:%=push-%): push-%: container-%
 	set -ex; \
 	push_image () { \
 		docker tag $*:latest $(IMAGE_NAME):$$tag; \
@@ -105,6 +105,77 @@ build: $(CMDS:%=build-%)
 container: $(CMDS:%=container-%)
 push: $(CMDS:%=push-%)
 
+# Additional parameters are needed when pushing to a local registry,
+# see https://github.com/docker/buildx/issues/94.
+# However, that then runs into https://github.com/docker/cli/issues/2396.
+#
+# What works for local testing is:
+# make push-multiarch PULL_BASE_REF=master REGISTRY_NAME=<your account on dockerhub.io> BUILD_PLATFORMS="linux amd64; windows amd64 .exe; linux ppc64le -ppc64le; linux s390x -s390x"
+DOCKER_BUILDX_CREATE_ARGS ?=
+
+# This target builds a multiarch image for one command using Moby BuildKit builder toolkit.
+# Docker Buildx is included in Docker 19.03.
+#
+# ./cmd/<command>/Dockerfile[.Windows] is used if found, otherwise Dockerfile[.Windows].
+# It is currently optional: if no such file exists, Windows images are not included,
+# even when Windows is listed in BUILD_PLATFORMS. That way, projects can test that
+# Windows binaries can be built before adding a Dockerfile for it.
+#
+# BUILD_PLATFORMS determines which individual images are included in the multiarch image.
+# PULL_BASE_REF must be set to 'master', 'release-x.y', or a tag name, and determines
+# the tag for the resulting multiarch image.
+$(CMDS:%=push-multiarch-%): push-multiarch-%: check-pull-base-ref build-%
+	set -ex; \
+	DOCKER_CLI_EXPERIMENTAL=enabled; \
+	export DOCKER_CLI_EXPERIMENTAL; \
+	docker buildx create $(DOCKER_BUILDX_CREATE_ARGS) --use --name multiarchimage-buildertest; \
+	trap "docker buildx rm multiarchimage-buildertest" EXIT; \
+	dockerfile_linux=$$(if [ -e ./cmd/$*/Dockerfile ]; then echo ./cmd/$*/Dockerfile; else echo Dockerfile; fi); \
+	dockerfile_windows=$$(if [ -e ./cmd/$*/Dockerfile.Windows ]; then echo ./cmd/$*/Dockerfile.Windows; else echo Dockerfile.Windows; fi); \
+	if [ '$(BUILD_PLATFORMS)' ]; then build_platforms='$(BUILD_PLATFORMS)'; else build_platforms="linux amd64"; fi; \
+	if ! [ -f "$$dockerfile_windows" ]; then \
+		build_platforms="$$(echo "$$build_platforms" | sed -e 's/windows *[^ ]* *.exe//g' -e 's/; *;/;/g')"; \
+	fi; \
+	pushMultiArch () { \
+		tag=$$1; \
+		echo "$$build_platforms" | tr ';' '\n' | while read -r os arch suffix; do \
+			docker buildx build --push \
+				--tag $(IMAGE_NAME):$$arch-$$os-$$tag \
+				--platform=$$os/$$arch \
+				--file $$(eval echo \$${dockerfile_$$os}) \
+				--build-arg binary=./bin/$*$$suffix \
+				--label revision=$(REV) \
+				.; \
+		done; \
+		images=$$(echo "$$build_platforms" | tr ';' '\n' | while read -r os arch suffix; do echo $(IMAGE_NAME):$$arch-$$os-$$tag; done); \
+		docker manifest create --amend $(IMAGE_NAME):$$tag $$images; \
+		docker manifest push -p $(IMAGE_NAME):$$tag; \
+	}; \
+	if [ $(PULL_BASE_REF) = "master" ]; then \
+			: "creating or overwriting canary image"; \
+			pushMultiArch canary; \
+	elif echo $(PULL_BASE_REF) | grep -q -e 'release-*' ; then \
+			: "creating or overwriting canary image for release branch"; \
+			release_canary_tag=$$(echo $(PULL_BASE_REF) | cut -f2 -d '-')-canary; \
+			pushMultiArch $$release_canary_tag; \
+	elif docker pull $(IMAGE_NAME):$(PULL_BASE_REF) 2>&1 | tee /dev/stderr | grep -q "manifest for $(IMAGE_NAME):$(PULL_BASE_REF) not found"; then \
+			: "creating release image"; \
+			pushMultiArch $(PULL_BASE_REF); \
+	else \
+			: "ERROR: release image $(IMAGE_NAME):$(PULL_BASE_REF) already exists: a new tag is required!"; \
+			exit 1; \
+	fi
+
+.PHONY: check-pull-base-ref
+check-pull-base-ref:
+	if ! [ "$(PULL_BASE_REF)" ]; then \
+		echo >&2 "ERROR: PULL_BASE_REF must be set to 'master', 'release-x.y', or a tag name."; \
+		exit 1; \
+	fi
+
+.PHONY: push-multiarch
+push-multiarch: $(CMDS:%=push-multiarch-%)
+
 clean:
 	-rm -rf bin
 

diff --git a/cloudbuild.sh b/cloudbuild.sh
@@ -0,0 +1,6 @@
+#! /bin/bash
+
+# shellcheck disable=SC1091
+. release-tools/prow.sh
+
+gcr_cloud_build
diff --git a/cloudbuild.yaml b/cloudbuild.yaml
@@ -0,0 +1,46 @@
+# A configuration file for multi-arch image building with the Google cloud build service.
+#
+# Repos using this file must:
+# - import csi-release-tools
+# - add a symlink cloudbuild.yaml -> release-tools/cloudbuild.yaml
+# - add a .cloudbuild.sh which can be a custom file or a symlink
+#   to release-tools/cloudbuild.sh
+# - accept "binary" as build argument in their Dockerfile(s) (see
+#   https://github.com/pohly/node-driver-registrar/blob/3018101987b0bb6da2a2657de607174d6e3728f7/Dockerfile#L4-L6)
+#   because binaries will get built for different architectures and then
+#   get copied from the built host into the container image
+#
+# See https://github.com/kubernetes/test-infra/blob/master/config/jobs/image-pushing/README.md
+# for more details on image pushing process in Kubernetes.
+#
+# To promote release images, see https://github.com/kubernetes/k8s.io/tree/master/k8s.gcr.io/images/k8s-staging-sig-storage.
+
+# This must be specified in seconds. If omitted, defaults to 600s (10 mins).
+timeout: 1800s
+# This prevents errors if you don't use both _GIT_TAG and _PULL_BASE_REF,
+# or any new substitutions added in the future.
+options:
+  substitution_option: ALLOW_LOOSE
+steps:
+  # The image must contain bash and curl. Ideally it should also contain
+  # the desired version of Go (currently defined in release-tools/travis.yml),
+  # but that just speeds up the build and is not required.
+  - name: 'gcr.io/k8s-testimages/gcb-docker-gcloud:v20200421-a2bf5f8'
+    entrypoint: ./.cloudbuild.sh
+    env:
+    - GIT_TAG=${_GIT_TAG}
+    - PULL_BASE_REF=${_PULL_BASE_REF}
+    - REGISTRY_NAME=gcr.io/${_STAGING_PROJECT}
+    - HOME=/root
+substitutions:
+  # _GIT_TAG will be filled with a git-based tag for the image, of the form vYYYYMMDD-hash, and
+  # can be used as a substitution.
+  _GIT_TAG: '12345'
+  # _PULL_BASE_REF will contain the ref that was pushed to trigger this build -
+  # a branch like 'master' or 'release-0.2', or a tag like 'v0.2'.
+  _PULL_BASE_REF: 'master'
+  # The default gcr.io staging project for Kubernetes-CSI
+  # (=> https://console.cloud.google.com/gcr/images/k8s-staging-sig-storage/GLOBAL).
+  # Might be overridden in the Prow build job for a repo which wants
+  # images elsewhere.
+  _STAGING_PROJECT: 'k8s-staging-sig-storage'
diff --git a/filter-junit.go b/filter-junit.go
@@ -15,10 +15,10 @@ limitations under the License.
 */
 
 /*
- * This command filters a JUnit file such that only tests with a name
- * matching a regular expression are passed through. By concatenating
- * multiple input files it is possible to merge them into a single file.
- */
+This command filters a JUnit file such that only tests with a name
+matching a regular expression are passed through. By concatenating
+multiple input files it is possible to merge them into a single file.
+*/
 package main
 
 import (

diff --git a/prow.sh b/prow.sh
@@ -85,7 +85,7 @@ get_versioned_variable () {
     echo "$value"
 }
 
-configvar CSI_PROW_BUILD_PLATFORMS "linux amd64; windows amd64 .exe; linux ppc64le -ppc64le; linux s390x -s390x" "Go target platforms (= GOOS + GOARCH) and file suffix of the resulting binaries"
+configvar CSI_PROW_BUILD_PLATFORMS "linux amd64; windows amd64 .exe; linux ppc64le -ppc64le; linux s390x -s390x; linux arm64 -arm64" "Go target platforms (= GOOS + GOARCH) and file suffix of the resulting binaries"
 
 # If we have a vendor directory, then use it. We must be careful to only
 # use this for "make" invocations inside the project's repo itself because
@@ -211,24 +211,29 @@ configvar CSI_PROW_DRIVER_INSTALL "install_csi_driver" "name of the shell functi
 # still use that name.
 configvar CSI_PROW_DRIVER_CANARY "${CSI_PROW_HOSTPATH_CANARY}" "driver image override for canary images"
 
+# Image registry to use for canary images.
+# Only valid if CSI_PROW_DRIVER_CANARY == "canary".
+configvar CSI_PROW_DRIVER_CANARY_REGISTRY "gcr.io/k8s-staging-sig-storage" "registry for canary images"
+
 # The E2E testing can come from an arbitrary repo. The expectation is that
 # the repo supports "go test ./test/e2e -args --storage.testdriver" (https://github.com/kubernetes/kubernetes/pull/72836)
 # after setting KUBECONFIG. As a special case, if the repository is Kubernetes,
 # then `make WHAT=test/e2e/e2e.test` is called first to ensure that
 # all generated files are present.
 #
 # CSI_PROW_E2E_REPO=none disables E2E testing.
-# TOOO: remove versioned variables and make e2e version match k8s version
-configvar CSI_PROW_E2E_VERSION_1_15 v1.15.0 "E2E version for Kubernetes 1.15.x"
-configvar CSI_PROW_E2E_VERSION_1_16 v1.16.0 "E2E version for Kubernetes 1.16.x"
-configvar CSI_PROW_E2E_VERSION_1_17 v1.17.0 "E2E version for Kubernetes 1.17.x"
-# TODO: add new CSI_PROW_E2E_VERSION entry for future Kubernetes releases
-configvar CSI_PROW_E2E_VERSION_LATEST master "E2E version for Kubernetes master" # testing against Kubernetes master is already tracking a moving target, so we might as well use a moving E2E version
-configvar CSI_PROW_E2E_REPO_LATEST https://github.com/kubernetes/kubernetes "E2E repo for Kubernetes >= 1.13.x" # currently the same for all versions
-configvar CSI_PROW_E2E_IMPORT_PATH_LATEST k8s.io/kubernetes "E2E package for Kubernetes >= 1.13.x" # currently the same for all versions
-configvar CSI_PROW_E2E_VERSION "$(get_versioned_variable CSI_PROW_E2E_VERSION "${csi_prow_kubernetes_version_suffix}")"  "E2E version"
-configvar CSI_PROW_E2E_REPO "$(get_versioned_variable CSI_PROW_E2E_REPO "${csi_prow_kubernetes_version_suffix}")" "E2E repo"
-configvar CSI_PROW_E2E_IMPORT_PATH "$(get_versioned_variable CSI_PROW_E2E_IMPORT_PATH "${csi_prow_kubernetes_version_suffix}")" "E2E package"
+tag_from_version () {
+    version="$1"
+    shift
+    case "$version" in
+        latest) echo "master";;
+        release-*) echo "$version";;
+        *) echo "v$version";;
+    esac
+}
+configvar CSI_PROW_E2E_VERSION "$(tag_from_version "${CSI_PROW_KUBERNETES_VERSION}")"  "E2E version"
+configvar CSI_PROW_E2E_REPO "https://github.com/kubernetes/kubernetes" "E2E repo"
+configvar CSI_PROW_E2E_IMPORT_PATH "k8s.io/kubernetes" "E2E package"
 
 # csi-sanity testing from the csi-test repo can be run against the installed
 # CSI driver. For this to work, deploying the driver must expose the Unix domain
@@ -342,7 +347,7 @@ configvar CSI_PROW_E2E_ALPHA_GATES_LATEST '' "alpha feature gates for latest Kub
 configvar CSI_PROW_E2E_ALPHA_GATES "$(get_versioned_variable CSI_PROW_E2E_ALPHA_GATES "${csi_prow_kubernetes_version_suffix}")" "alpha E2E feature gates"
 
 # Which external-snapshotter tag to use for the snapshotter CRD and snapshot-controller deployment
-configvar CSI_SNAPSHOTTER_VERSION 'v2.0.0' "external-snapshotter version tag"
+configvar CSI_SNAPSHOTTER_VERSION 'v2.0.1' "external-snapshotter version tag"
 
 # Some tests are known to be unusable in a KinD cluster. For example,
 # stopping kubelet with "ssh <node IP> systemctl stop kubelet" simply
@@ -513,6 +518,10 @@ go_version_for_kubernetes () (
     if ! [ "$go_version" ]; then
         die "Unable to determine Go version for Kubernetes $version from hack/lib/golang.sh."
     fi
+    # Strip the trailing .0. Kubernetes includes it, Go itself doesn't.
+    # Ignore: See if you can use ${variable//search/replace} instead.
+    # shellcheck disable=SC2001
+    go_version="$(echo "$go_version" | sed -e 's/\.0$//')"
     echo "$go_version"
 )
 
@@ -688,7 +697,11 @@ install_csi_driver () {
     fi
 
     if [ "${CSI_PROW_DRIVER_CANARY}" != "stable" ]; then
+      if [ "${CSI_PROW_DRIVER_CANARY}" == "canary" ]; then
+        images="$images IMAGE_TAG=${CSI_PROW_DRIVER_CANARY} IMAGE_REGISTRY=${CSI_PROW_DRIVER_CANARY_REGISTRY}"
+      else
         images="$images IMAGE_TAG=${CSI_PROW_DRIVER_CANARY}"
+      fi
     fi
     # Ignore: Double quote to prevent globbing and word splitting.
     # It's intentional here for $images.
@@ -1064,18 +1077,24 @@ main () {
                 # always pulling the image
                 # (https://github.com/kubernetes-sigs/kind/issues/328).
                 docker tag "$i:latest" "$i:csiprow" || die "tagging the locally built container image for $i failed"
-            done
 
-            if [ -e deploy/kubernetes/rbac.yaml ]; then
-                # This is one of those components which has its own RBAC rules (like external-provisioner).
-                # We are testing a locally built image and also want to test with the the current,
-                # potentially modified RBAC rules.
-                if [ "$(echo "$cmds" | wc -w)" != 1 ]; then
-                    die "ambiguous deploy/kubernetes/rbac.yaml: need exactly one command, got: $cmds"
+                # For components with multiple cmds, the RBAC file should be in the following format:
+                #   rbac-$cmd.yaml
+                # If this file cannot be found, we can default to the standard location:
+                #   deploy/kubernetes/rbac.yaml
+                rbac_file_path=$(find . -type f -name "rbac-$i.yaml")
+                if [ "$rbac_file_path" == "" ]; then
+                    rbac_file_path="$(pwd)/deploy/kubernetes/rbac.yaml"
                 fi
-                e=$(echo "$cmds" | tr '[:lower:]' '[:upper:]' | tr - _)
-                images="$images ${e}_RBAC=$(pwd)/deploy/kubernetes/rbac.yaml"
-            fi
+
+                if [ -e "$rbac_file_path" ]; then
+                    # This is one of those components which has its own RBAC rules (like external-provisioner).
+                    # We are testing a locally built image and also want to test with the the current,
+                    # potentially modified RBAC rules.
+                    e=$(echo "$i" | tr '[:lower:]' '[:upper:]' | tr - _)
+                    images="$images ${e}_RBAC=$rbac_file_path"
+                fi
+            done
         fi
 
         if tests_need_non_alpha_cluster; then
@@ -1183,3 +1202,23 @@ main () {
 
     return "$ret"
 }
+
+# This function can be called by a repo's top-level cloudbuild.sh:
+# it handles environment set up in the GCR cloud build and then
+# invokes "make push-multiarch" to do the actual image building.
+gcr_cloud_build () {
+    # Register gcloud as a Docker credential helper.
+    # Required for "docker buildx build --push".
+    gcloud auth configure-docker
+
+    if find . -name Dockerfile | grep -v ^./vendor | xargs --no-run-if-empty cat | grep -q ^RUN; then
+        # Needed for "RUN" steps on non-linux/amd64 platforms.
+        # See https://github.com/multiarch/qemu-user-static#getting-started
+        (set -x; docker run --rm --privileged multiarch/qemu-user-static --reset -p yes)
+    fi
+
+    # Extract tag-n-hash value from GIT_TAG (form vYYYYMMDD-tag-n-hash) for REV value.
+    REV=v$(echo "$GIT_TAG" | cut -f3- -d 'v')
+
+    run_with_go "${CSI_PROW_GO_VERSION_BUILD}" make push-multiarch REV="${REV}" REGISTRY_NAME="${REGISTRY_NAME}" BUILD_PLATFORMS="${CSI_PROW_BUILD_PLATFORMS}"
+}
diff --git a/travis.yml b/travis.yml
@@ -6,7 +6,7 @@ git:
   depth: false
 matrix:
   include:
-  - go: 1.13.3
+  - go: 1.15
 before_script:
 - mkdir -p bin
 - wget https://github.com/golang/dep/releases/download/v0.5.1/dep-linux-amd64 -O bin/dep