cloudprovider: add Bizflycloud provider

[lmq1999]

This adds a new cluster autoscaler for Bizflycloud Kubernetes Engine

P/s:
Remove new dependencies and add inline cloud provider package
Make new pull request since old pull request commited by un-emailed user

[lmq1999]

I need help with my sub package, it didn't go though test-and-verify process

[lmq1999]

/assign @mwielgus

[lmq1999]

@mwielgus Hi, can you review my change again?
I have remove dependencies and add inline package as other cloud provider.

I already edit verify file but my API package didn't pass the verifier

[mwielgus]

Looks good, please also add your cloud provider here and we are good to go:

https://github.com/kubernetes/autoscaler/blob/master/cluster-autoscaler/README.md

[lmq1999]

Looks good, please also add your cloud provider here and we are good to go:

https://github.com/kubernetes/autoscaler/blob/master/cluster-autoscaler/README.md

Added as you say

[mwielgus]

Actually, there is one serious problem I have just noticed (sorry for not checking it earlier). Your cloud provider library is released under GPL(https://github.com/kubernetes/autoscaler/pull/4009/files#diff-d85a67df5ab779ac4287080d3d00b64aded31bf33207f0594c546ae51a32482c) which is not compatible with Apache license under which Cluster Autoscaler is released (https://github.com/kubernetes/autoscaler/blob/master/LICENSE).

Quote from https://www.apache.org/licenses/GPL-compatibility.html:

[...] However, GPLv3 software cannot be included in Apache projects. The licenses are incompatible in one direction only, and it is a result of ASF's licensing philosophy and the GPLv3 authors' interpretation of copyright law. [...]

So we cannot accept any Bizflycloud dependency as long as it stays under GPL. If your are employed in Bizflycloud please talk to your lawyers about possible license change.

[lmq1999]

Actually, there is one serious problem I have just noticed (sorry for not checking it earlier). Your cloud provider library is released under GPL(https://github.com/kubernetes/autoscaler/pull/4009/files#diff-d85a67df5ab779ac4287080d3d00b64aded31bf33207f0594c546ae51a32482c) which is not compatible with Apache license under which Cluster Autoscaler is released (https://github.com/kubernetes/autoscaler/blob/master/LICENSE).

Quote from https://www.apache.org/licenses/GPL-compatibility.html:

[...] However, GPLv3 software cannot be included in Apache projects. The licenses are incompatible in one direction only, and it is a result of ASF's licensing philosophy and the GPLv3 authors' interpretation of copyright law. [...]

So we cannot accept any Bizflycloud dependency as long as it stays under GPL. If your are employed in Bizflycloud please talk to your lawyers about possible license change.

Can we use MIT license for Bizfly Cloud dependency instead of GPL. I can't ask him right now but I will talk to him later

[lmq1999]

We have manage to change license to MIT since it also compatible with Apache 2.0 license

[lmq1999]

@mwielgus Can you check the PR again, it quite long since your last review

[mwielgus]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lmq1999, mwielgus

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