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kms: add support for MinKMS and remove some unused/broken code (#19368)

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This commit adds support for MinKMS. Now, there are three KMS
implementations in `internal/kms`: Builtin, MinIO KES and MinIO KMS.

Adding another KMS integration required some cleanup. In particular:
 - Various KMS APIs that haven't been and are not used have been
   removed. A lot of the code was broken anyway.
 - Metrics are now monitored by the `kms.KMS` itself. For basic
   metrics this is simpler than collecting metrics for external
   servers. In particular, each KES server returns its own metrics
   and no cluster-level view.
 - The builtin KMS now uses the same en/decryption implemented by
   MinKMS and KES. It still supports decryption of the previous
   ciphertext format. It's backwards compatible.
 - Data encryption keys now include a master key version since MinKMS
   supports multiple versions (~4 billion in total and 10000 concurrent)
   per key name.

Signed-off-by: Andreas Auernhammer <github@aead.dev>
This commit is contained in:
Andreas Auernhammer
2024-05-08 01:55:37 +02:00
committed by GitHub
parent 981497799a
commit 8b660e18f2
36 changed files with 1794 additions and 1808 deletions
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2
cmd/healthcheck-handler.go
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@@ -135,7 +135,7 @@ func ReadinessCheckHandler(w http.ResponseWriter, r *http.Request) {
ctx, cancel := context.WithTimeout(r.Context(), time.Minute)
defer cancel()
if _, err := GlobalKMS.GenerateKey(ctx, "", kms.Context{"healthcheck": ""}); err != nil {
if _, err := GlobalKMS.GenerateKey(ctx, &kms.GenerateKeyRequest{AssociatedData: kms.Context{"healthcheck": ""}}); err != nil {
switch r.Method {
case http.MethodHead:
apiErr := toAPIError(r.Context(), err)