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# Instructions: | |
# 1. save this file somewhere, for example /home/stack/ceph_wipe_disk.yaml | |
# 2. create an empty ceph_wipe_env.yaml with the following contents: | |
# | |
# resource_registry: | |
# OS::TripleO::NodeUserData: /home/stack/ceph_wipe_disk.yaml | |
# parameter_defaults: | |
# ceph_disks: "/dev/sdb /dev/sdc" | |
# | |
# 3. when deploying, add to the CLI command the following argument: | |
# | |
# -e /path/to/ceph_wipe_env.yaml | |
heat_template_version: 2014-10-16 | |
parameters: | |
ceph_disks: | |
type: string | |
description: A list of block devices to be cleared with an empty GPT label. | |
default: "/dev/sdb /dev/sdc" | |
description: > | |
This is an example showing how you can clear the cephstorage nodes disk with an empty GPT label on firstboot. | |
resources: | |
userdata: | |
type: OS::Heat::MultipartMime | |
properties: | |
parts: | |
- config: {get_resource: wipe_disk} | |
wipe_disk: | |
type: OS::Heat::SoftwareConfig | |
properties: | |
config: | |
str_replace: | |
template: | | |
#!/bin/bash | |
case "$(hostname)" in | |
*cephstorage*) | |
for d in $disks; do | |
if [ -b ${d} ]; then | |
echo "Wiping disk ${d} ..." | |
sgdisk -Z ${d} | |
sgdisk -o ${d} | |
fi | |
done | |
;; | |
esac | |
params: | |
$disks: {get_param: ceph_disks} | |
outputs: | |
OS::stack_id: | |
value: {get_resource: userdata} |
hi, I think best option to make sure this is applied only on the relevant nodes is to add role-specific NodeUserData in the parent templates, what do you think?
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Note that this will only work if the user hasn't renamed their ceph nodes. If someone sets their ceph hostname format to my-super-awesome-ceph-node-%index% this isn't going to work properly.
Also, is there any way we could avoid duplicating the disk list? That information should already be available in the ceph metadata, shouldn't it?