Support Alibaba OSS as an external blobstore for bosh

[mvach]

As of today there is no native integration of the Alibaba Storage (OSS) in BOSH.
This issue aims to implement that integration.

It requires to:

• implement a storage cli for Alibaba OSS
• auto bump the storage cli
• integrate the cli into bosh
• add the storage cli into the stemcell builder
• update the stemcell ci
• and update the documentation finally

This issue should provides the required transparency.

[mvach]

The storage cli will be implemented in: https://github.com/cloudfoundry/bosh-ali-storage-cli
There is already a PR that provides the the initial version: cloudfoundry/bosh-ali-storage-cli#1

[mvach]

A very similar integration of the azure-storage-cli into bosh was already done in #2457

[mvach]

The CI integration for azure-storage-cli will be added with:

• Vendor all dependencies bosh-ali-storage-cli#3
• Add ci integration bosh-ali-storage-cli#4

[rkoster]

@mvach are you still working on this?

[mvach]

Hi @rkoster,
because of priorities, the bosh director integration of this cli is currently on hold.
Currently I cannot estimate when we will continue with it.