Refactor image builds to use buildx for multi arch image building

[jenting]

Proposed Changes

• Refactor the images build to use docker buildx for the multi-arch image build
• Bump Go to 1.15

Types of Changes

• Dockerfile
• Makefile
• CI/CD

Verification

Follow the Build from source

1. The following build commands work:

REGISTRY=jenting BUILDX_OUTPUT_TYPE=registry make container

BUILDX_PLATFORMS=linux/arm64 make container

REGISTRY=jenting VERSION=test BUILDX_PLATFORMS=linux/amd64,linux/arm64,linux/arm/v7,linux/ppc64le BUILDX_OUTPUT_TYPE=registry make all-containers

2. I have done a test on .github/workflows/push.yml with a hack push to my docker hub account, it works correctly.

3. I have deployed the velero-plugin-for-aws on amd64 and arm64 machines from step 2 result, both work correctly.

Linked Issues

Fixes vmware-tanzu/velero#3139

Further Comments

Ref to vmware-tanzu/velero#2754

[carlisia]

@jenting couple things:

• sorry for taking long to get to review this, but I'm sure we're only going to get around to it after we ship v1.6
• we were (recently) authorized to not use the year in the copyright. So please use Copyright the Velero contributors. going forward. We are looking forward to not having to update that header anymore at some point. Thanks.

[jenting]

@jenting couple things:

• sorry for taking long to get to review this, but I'm sure we're only going to get around to it after we ship v1.6
• we were (recently) authorized to not use the year in the copyright. So please use Copyright the Velero contributors. going forward. We are looking forward to not having to update that header anymore at some point. Thanks.

@carlisia Could you please take a look? Thanks.

[jenting]

Use #103 to tackle this.
Close it.