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Bring in safe mode support (#8478)

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This PR refactors object layer handling such
that upon failure in sub-system initialization
server reaches a stage of safe-mode operation
wherein only certain API operations are enabled
and available.

This allows for fixing many scenarios such as

 - incorrect configuration in vault, etcd,
   notification targets
 - missing files, incomplete config migrations
   unable to read encrypted content etc
 - any other issues related to notification,
   policies, lifecycle etc
This commit is contained in:
Harshavardhana
2019-11-09 09:27:23 -08:00
committed by kannappanr
parent 1c90a6bd49
commit 822eb5ddc7
41 changed files with 1129 additions and 830 deletions
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10
cmd/disk-cache.go
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@@ -553,23 +553,23 @@ func newServerCacheObjects(ctx context.Context, config cache.Config) (CacheObjec
migrating: migrateSw,
migMutex: sync.Mutex{},
GetObjectInfoFn: func(ctx context.Context, bucket, object string, opts ObjectOptions) (ObjectInfo, error) {
return globalObjectAPI.GetObjectInfo(ctx, bucket, object, opts)
return newObjectLayerFn().GetObjectInfo(ctx, bucket, object, opts)
},
GetObjectNInfoFn: func(ctx context.Context, bucket, object string, rs *HTTPRangeSpec, h http.Header, lockType LockType, opts ObjectOptions) (gr *GetObjectReader, err error) {
return globalObjectAPI.GetObjectNInfo(ctx, bucket, object, rs, h, lockType, opts)
return newObjectLayerFn().GetObjectNInfo(ctx, bucket, object, rs, h, lockType, opts)
},
DeleteObjectFn: func(ctx context.Context, bucket, object string) error {
return globalObjectAPI.DeleteObject(ctx, bucket, object)
return newObjectLayerFn().DeleteObject(ctx, bucket, object)
},
DeleteObjectsFn: func(ctx context.Context, bucket string, objects []string) ([]error, error) {
errs := make([]error, len(objects))
for idx, object := range objects {
errs[idx] = globalObjectAPI.DeleteObject(ctx, bucket, object)
errs[idx] = newObjectLayerFn().DeleteObject(ctx, bucket, object)
}
return errs, nil
},
PutObjectFn: func(ctx context.Context, bucket, object string, data *PutObjReader, opts ObjectOptions) (objInfo ObjectInfo, err error) {
return globalObjectAPI.PutObject(ctx, bucket, object, data, opts)
return newObjectLayerFn().PutObject(ctx, bucket, object, data, opts)
},
}
if migrateSw {