diff options
| author | Mathieu Mitchell <mmitchell@iweb.com> | 2014-10-16 16:51:44 -0400 |
|---|---|---|
| committer | Mathieu Mitchell <mmitchell@iweb.com> | 2014-10-20 10:27:02 -0400 |
| commit | e53e297a5e920ca4621acfca6c4896a51ba4754d (patch) | |
| tree | c831f89d5b46010d7f2d85c2e2101b5f72c9f4e9 /ironic_python_agent/shell | |
| parent | 082cf29cec31efda2d63eeb9dda8c74e396be6eb (diff) | |
| download | ironic-python-agent-e53e297a5e920ca4621acfca6c4896a51ba4754d.tar.gz | |
Write image directly to disk
Write image directly to disk by telling qemu-img that the output
file is the disk. Still uses O_DIRECT directly within qemu-img.
This avoids the need to have a huge amount of system memory to be
able to deploy an image that contains a huge disk.
The only feature left behind by that commit is the 64K block size.
Change-Id: If60bcd82581b2ea76c4acbc3eaa3f317d2ee6590
Diffstat (limited to 'ironic_python_agent/shell')
| -rwxr-xr-x | ironic_python_agent/shell/write_image.sh | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/ironic_python_agent/shell/write_image.sh b/ironic_python_agent/shell/write_image.sh index 272e342b..ba589419 100755 --- a/ironic_python_agent/shell/write_image.sh +++ b/ironic_python_agent/shell/write_image.sh @@ -38,14 +38,8 @@ DEVICE="$2" log "Erasing existing mbr from ${DEVICE}" dd if=/dev/zero of=$DEVICE bs=512 count=10 -## Doing two steps allows us to use dd, which allows us to tweak things like -## blocksize and allows use of direct io -# Converts image to raw -log "Converting $IMAGEFILE to RAW format" -qemu-img convert -O raw $IMAGEFILE /tmp/image.raw - -# Write image onto device -log "Imaging $DEVICE" -dd if=/tmp/image.raw of=$DEVICE bs=64K oflag=direct +log "Imaging $IMAGEFILE to $DEVICE" +qemu-img convert -t directsync -O raw $IMAGEFILE $DEVICE +sync log "${DEVICE} imaged successfully!" |