3c4ae99614
Right now StorageDevices store the name of devices which on reboot can change. In order to fix that, we will use udev rules and find the device id in /dev/disk/by-id. For SSD disks, there is a unique identifier with wwn- prefix and for NVMe disks, there is a unique Identifier with the nvme-eui prefix. We will store these values in the database and on healthcheck queries find the right device name and proceed with the normal health check routine.
58 lines
2.5 KiB
Ruby
58 lines
2.5 KiB
Ruby
# frozen_string_literal: true
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require_relative "../model"
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require_relative "../lib/system_parser"
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class StorageDevice < Sequel::Model
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many_to_one :vm_host
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def self.ubid_type
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UBID::TYPE_ETC
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end
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include ResourceMethods
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def migrate_device_name_to_device_id
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update(unix_device_list: unix_device_list.map { |device_name| StorageDevice.convert_device_name_to_device_id(vm_host.sshable, device_name) })
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end
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# We have both raided and non-raided servers, in non-raided servers, we can call blkid to get the uuid
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# but in the case of raided servers, all the underlying disk devices will be shown with the same uuid of the raid device
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# (/dev/md) so we end up with duplicate uuids for different ssd or nvme disks. so we won't use /dev/disk/by-uuid
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#
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# to handle this, we would use /dev/disk/by-id instead.
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# For SSD disks, there is a unique identifier which starts with wwn (World Wide Name) which is claimed to be unique across the world
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# For NVMe disks, there is a unique identidier which starts with nvme-eui and it is also claimed to be unique
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#
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# All of our disks are either SSD or NVMe, so the assumptions that we can rely on these two prefixes is reliable
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def self.convert_device_name_to_device_id(sshable, device_name)
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if device_name.start_with?("sd")
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sshable.cmd("ls -l /dev/disk/by-id/ | grep '#{device_name}$' | grep 'wwn-' | sed -E 's/.*(wwn[^ ]*).*/\\1/'").strip
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elsif device_name.start_with?("nvme")
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sshable.cmd("ls -l /dev/disk/by-id/ | grep '#{device_name}$' | grep 'nvme-eui' | sed -E 's/.*(nvme-eui[^ ]*).*/\\1/'").strip
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else
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device_name
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end
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end
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end
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# Table: storage_device
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# Columns:
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# id | uuid | PRIMARY KEY
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# name | text | NOT NULL
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# total_storage_gib | integer | NOT NULL
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# available_storage_gib | integer | NOT NULL
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# enabled | boolean | NOT NULL DEFAULT true
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# vm_host_id | uuid |
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# unix_device_list | text[] |
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# Indexes:
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# storage_device_pkey | PRIMARY KEY btree (id)
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# storage_device_vm_host_id_name_key | UNIQUE btree (vm_host_id, name)
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# Check constraints:
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# available_storage_gib_less_than_or_equal_to_total | (available_storage_gib <= total_storage_gib)
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# available_storage_gib_non_negative | (available_storage_gib >= 0)
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# Foreign key constraints:
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# storage_device_vm_host_id_fkey | (vm_host_id) REFERENCES vm_host(id)
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# Referenced By:
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# vm_storage_volume | vm_storage_volume_storage_device_id_fkey | (storage_device_id) REFERENCES storage_device(id)
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