e53e297a5e
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
46 lines
1.3 KiB
Bash
Executable File
46 lines
1.3 KiB
Bash
Executable File
#!/bin/bash
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# Copyright 2013 Rackspace, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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set -e
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log() {
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echo "`basename $0`: $@"
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}
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usage() {
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[[ -z "$1" ]] || echo -e "USAGE ERROR: $@\n"
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echo "`basename $0`: IMAGEFILE DEVICE"
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echo " - This script images DEVICE with IMAGEFILE"
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exit 1
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}
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IMAGEFILE="$1"
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DEVICE="$2"
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[[ -f $IMAGEFILE ]] || usage "$IMAGEFILE (IMAGEFILE) is not a file"
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[[ -b $DEVICE ]] || usage "$DEVICE (DEVICE) is not a block device"
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# In production this will be replaced with secure erasing the drives
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# For now we need to ensure there aren't any old (GPT) partitions on the drive
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log "Erasing existing mbr from ${DEVICE}"
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dd if=/dev/zero of=$DEVICE bs=512 count=10
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log "Imaging $IMAGEFILE to $DEVICE"
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qemu-img convert -t directsync -O raw $IMAGEFILE $DEVICE
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sync
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log "${DEVICE} imaged successfully!"
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