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Update install from ISO docs #771

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Jan 18, 2025
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Update install from ISO docs #771

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28 changes: 7 additions & 21 deletions docs/guides/user-guide/openstack/install-instance-from-iso.md
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Original file line number Diff line number Diff line change
Expand Up @@ -28,17 +28,15 @@ The `hw_rescue_device` and `hw_rescue_bus` properties may be omitted if you do n

### Using nova local storage

Create an instance with a blank local boot device, e.g.:

Until [this bug](https://bugs.launchpad.net/nova/+bug/2090926) is fixed, one cannot create an instance with a blank local boot device. As a workaround create an unbootable dummy image first, e.g.:
One cannot create an instance with a blank local boot device. As a workaround create a blank image first, e.g.:

```
DUMMY_IMAGE_NAME="dummy"
dd if=/dev/zero of="$DUMMY_IMAGE_NAME" bs=1k count=1
BLANK_IMAGE_NAME="blank"
dd if=/dev/zero of="$BLANK_IMAGE_NAME" bs=1k count=1
openstack image create \
--file "$DUMMY_IMAGE_NAME" \
"$DUMMY_IMAGE_NAME"
rm "$DUMMY_IMAGE_NAME"
--file "$BLANK_IMAGE_NAME" \
"$BLANK_IMAGE_NAME"
rm "$BLANK_IMAGE_NAME"
```

Create the instance:
Expand All @@ -48,19 +46,7 @@ INSTANCE_NAME=""
FLAVOR=""
openstack server create \
--flavor "$FLAVOR" \
--image "$DUMMY_IMAGE_NAME" \
--no-network \
"$INSTANCE_NAME"
```

Once the bug is fixed the instance may be created directly:

```
INSTANCE_NAME=""
FLAVOR=""
openstack server create \
--flavor "$FLAVOR" \
--block-device "source_type=blank,destination_type=local,guest_format=raw,boot_index=0" \
--image "$BLANK_IMAGE_NAME" \
--no-network \
"$INSTANCE_NAME"
```
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