5c2d0fc71c
If a storage volume's vhost_block_backend_version param is set, then a
Ubiblk installation is used instead of SPDK.
Let `storage-root=/var/storage/${vm_name}/$disk-index/`. Then:
- Ubiblk config is stored at `${storage-root}/vhost-backend.conf`.
- Ubiblk metadata is stored at `$storage-root/metadata`.
- A systemd-unit `${vm_name}-${disk-idx}-storage` is created to act as
VM's storage device. It starts the Ubiblk's vhost-backend binary,
stored at `/opt/vhost-block-backend/${version}/`.
- Key Encryption Key (KEK) is communicated to the storage service using
a pipe created at `${storage-root$}/kek.pipe`.
- Storage service creates a vhost-user-blk socket at
`${storage-root}/vhost.socket` which Cloud-Hypervisor connects to.
51 lines
1.1 KiB
Ruby
51 lines
1.1 KiB
Ruby
# frozen_string_literal: true
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DEFAULT_STORAGE_DEVICE = "DEFAULT"
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class StoragePath
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def initialize(vm_name, device, disk_index)
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@vm_name = vm_name
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@device = device
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@disk_index = disk_index
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end
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def device_path
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@device_path ||=
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(@device == DEFAULT_STORAGE_DEVICE) ?
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File.join("", "var", "storage") :
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File.join("", "var", "storage", "devices", @device)
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end
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def storage_root
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@storage_root ||= File.join(device_path, @vm_name)
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end
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def storage_dir
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@storage_dir ||= File.join(storage_root, @disk_index.to_s)
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end
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def disk_file
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@disk_file ||= File.join(storage_dir, "disk.raw")
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end
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def data_encryption_key
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@dek_path ||= File.join(storage_dir, "data_encryption_key.json")
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end
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def vhost_sock
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@vhost_sock ||= File.join(storage_dir, "vhost.sock")
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end
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def kek_pipe
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@kek_pipe ||= File.join(storage_dir, "kek.pipe")
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end
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def vhost_backend_config
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@vhost_backend_config ||= File.join(storage_dir, "vhost-backend.conf")
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end
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def vhost_backend_metadata
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@vhost_backend_metadata ||= File.join(storage_dir, "metadata")
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end
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end
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