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kubernetes/cluster
Kubernetes Submit Queue 0d17e9deb7 Merge pull request #48574 from sakshamsharma/kms-transformer
Automatic merge from submit-queue

Add Google cloud KMS service for envelope encryption transformer

This adds the required pieces which will allow addition of KMS based encryption providers (envelope transformer).

For now, we will be implementing it using Google Cloud KMS, but the code should make it easy to add support for any other such provider which can expose Decrypt and Encrypt calls.

Writing tests for Google Cloud KMS Service may cause a significant overhead to the testing framework. It has been tested locally and on GKE though.

Upcoming after this PR:
* Complete implementation of the envelope transformer, which uses LRU cache to maintain decrypted DEKs in memory.
* Track key version to assist in data re-encryption after a KEK rotation.

Development branch containing the changes described above: https://github.com/sakshamsharma/kubernetes/pull/4

Envelope transformer used by this PR was merged in #49350 

Concerns #48522 

Planned configuration:
```
kind: EncryptionConfig
apiVersion: v1
resources:
  - resources:
    - secrets
    providers:
    - kms:
        cachesize: 100
        configfile: gcp-cloudkms.conf
        name: gcp-cloudkms
    - identity: {}
```

gcp-cloudkms.conf:
```
[GoogleCloudKMS]
    kms-location: global
    kms-keyring: google-container-engine
    kms-cryptokey: example-key
```
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Cluster Configuration

Deprecation Notice: This directory has entered maintenance mode and will not be accepting new providers. Please submit new automation deployments to kube-deploy. Deployments in this directory will continue to be maintained and supported at their current level of support.

The scripts and data in this directory automate creation and configuration of a Kubernetes cluster, including networking, DNS, nodes, and master components.

See the getting-started guides for examples of how to use the scripts.

cloudprovider/config-default.sh contains a set of tweakable definitions/parameters for the cluster.

The heavy lifting of configuring the VMs is done by SaltStack.

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