Fix make etcd image failed

[kkkkun]

What type of PR is this?

/kind bug

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes # #117557

The failed messages are because ifeq is must be white-space, but in https://github.com/kubernetes/kubernetes/pull/115255/files#diff-de315dbb88d6d341b1682ef2fb0798723139fb4202ac607a334fc301e9359ec7R184, it is TAB . So make failed.

https://prow.k8s.io/view/gs/kubernetes-jenkins/logs/post-kubernetes-push-image-etcd/1649533793343639552#1:build-log.txt%3A664

done
# Add this ENV variable in order to workaround an unsupported arch blocker
# On arm (which is 32-bit), it can't handle >1GB data in-memory
ifeq (arm,arm)
/bin/sh: syntax error: unexpected word (expecting ")")
make[1]: *** [Makefile:133: build] Error 2
make[1]: Leaving directory '/workspace/cluster/images/etcd'
make: *** [Makefile:215: sub-push-image-linux-arm] Error 2

Before:

make OUTPUT_TYPE=registry OS=linux ARCH=arm OSVERSION= REGISTRY=gcr.io/k8s-staging-etcd 
# Explicitly copy files to the temp directory
# Download etcd in a golang container and cross-compile it statically
# For each release create a tmp dir 'etcd_release_tmp_dir' and unpack the release tar there.
arch_prefix=""
arch_prefix="GOARM=7"
# use '/go/src/go.etcd.io/etcd' to build etcd 3.4 and later.
# Add this ENV variable in order to workaround an unsupported arch blocker
# On arm (which is 32-bit), it can't handle >1GB data in-memory
ifeq (arm,arm)
/bin/sh: 1: Syntax error: word unexpected (expecting ")")
make: *** [Makefile:127: build] Error 2

After:

make OUTPUT_TYPE=registry OS=linux ARCH=arm OSVERSION= REGISTRY=gcr.io/k8s-staging-etcd 
# Explicitly copy files to the temp directory
# Download etcd in a golang container and cross-compile it statically
# For each release create a tmp dir 'etcd_release_tmp_dir' and unpack the release tar there.
arch_prefix=""
arch_prefix="GOARM=7"
# use '/go/src/go.etcd.io/etcd' to build etcd 3.4 and later.
# Add this ENV variable in order to workaround an unsupported arch blocker
# On arm (which is 32-bit), it can't handle >1GB data in-memory
cd /tmp/tmp.Ss3koCa796 && echo "ENV ETCD_UNSUPPORTED_ARCH=arm" >> Dockerfile
docker run --rm --privileged multiarch/qemu-user-static:5.2.0-2 --reset -p yes
Setting /usr/bin/qemu-alpha-static as binfmt interpreter for alpha
Setting /usr/bin/qemu-arm-static as binfmt interpreter for arm
Setting /usr/bin/qemu-armeb-static as binfmt interpreter for armeb
Setting /usr/bin/qemu-sparc-static as binfmt interpreter for sparc
Setting /usr/bin/qemu-sparc32plus-static as binfmt interpreter for sparc32plus
Setting /usr/bin/qemu-sparc64-static as binfmt interpreter for sparc64
Setting /usr/bin/qemu-ppc-static as binfmt interpreter for ppc
Setting /usr/bin/qemu-ppc64-static as binfmt interpreter for ppc64
Setting /usr/bin/qemu-ppc64le-static as binfmt interpreter for ppc64le
Setting /usr/bin/qemu-m68k-static as binfmt interpreter for m68k
Setting /usr/bin/qemu-mips-static as binfmt interpreter for mips
Setting /usr/bin/qemu-mipsel-static as binfmt interpreter for mipsel
Setting /usr/bin/qemu-mipsn32-static as binfmt interpreter for mipsn32
Setting /usr/bin/qemu-mipsn32el-static as binfmt interpreter for mipsn32el
Setting /usr/bin/qemu-mips64-static as binfmt interpreter for mips64
Setting /usr/bin/qemu-mips64el-static as binfmt interpreter for mips64el
Setting /usr/bin/qemu-sh4-static as binfmt interpreter for sh4
Setting /usr/bin/qemu-sh4eb-static as binfmt interpreter for sh4eb
Setting /usr/bin/qemu-s390x-static as binfmt interpreter for s390x

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

Hi @kkkkun. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[kkkkun]

/assign @pacoxu @dims @BenTheElder @xmudrii

[kkkkun]

/release-note-none

[kkkkun]

/priority important-soon

[pacoxu]

/ok-to-test

[pacoxu]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 91bf76d4d5752588bdda3da4398be080566f89ac

[dims]

/approve
/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dims, kkkkun, xmudrii

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• cluster/images/etcd/OWNERS [dims]

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[pacoxu]

https://prow.k8s.io/view/gs/kubernetes-jenkins/logs/post-kubernetes-push-image-etcd/1655912643896020992 succeed. 👍

[BenTheElder]

Thanks!

[fedebongio]

/triage accepted