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https://github.com/siderolabs/talos.git
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4575dd8e74
Preallocation still done by default for correct max usage estimates, but in development environment it could be beneficial not to use up that space, so I added a flag to disable preallocation Signed-off-by: Dmitry Sharshakov <d3dx12.xx@gmail.com> Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>
60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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package vm
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import (
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"errors"
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"fmt"
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"os"
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"syscall"
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"github.com/siderolabs/talos/pkg/provision"
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)
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// UserDiskName returns disk device path.
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func (p *Provisioner) UserDiskName(index int) string {
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// the disk IDs are assigned in the following way:
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// * ata-QEMU_HARDDISK_QM00001
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// * ata-QEMU_HARDDISK_QM00003
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// * ata-QEMU_HARDDISK_QM00005
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return fmt.Sprintf("/dev/disk/by-id/ata-QEMU_HARDDISK_QM%05d", (index-1)*2+1)
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}
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// CreateDisks creates empty disk files for each disk.
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func (p *Provisioner) CreateDisks(state *State, nodeReq provision.NodeRequest) (diskPaths []string, err error) {
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diskPaths = make([]string, len(nodeReq.Disks))
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for i, disk := range nodeReq.Disks {
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diskPath := state.GetRelativePath(fmt.Sprintf("%s-%d.disk", nodeReq.Name, i))
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var diskF *os.File
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diskF, err = os.Create(diskPath)
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if err != nil {
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return nil, err
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}
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defer diskF.Close() //nolint:errcheck
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if err = diskF.Truncate(int64(disk.Size)); err != nil {
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return nil, err
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}
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if !disk.SkipPreallocate {
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if err = syscall.Fallocate(int(diskF.Fd()), 0, 0, int64(disk.Size)); err != nil {
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fmt.Fprintf(os.Stderr, "WARNING: failed to preallocate disk space for %q (size %d): %s", diskPath, disk.Size, err)
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}
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}
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diskPaths[i] = diskPath
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}
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if len(diskPaths) == 0 {
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return nil, errors.New("node request must have at least one disk defined to be used as primary disk")
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}
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return diskPaths, nil
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}
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