Import plugin's code

Change-Id: I6c9ea6894e44802a57e5dd6aedc64f230467b5c5
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Margarita Shakhova 2017-07-18 08:51:52 -07:00
parent f3ac65ecb3
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Ceph Multibackend plugin for Fuel
=================================
Overview
--------
Ceph Multibackend plugin for Fuel extends Mirantis OpenStack functionality by adding
support for Ceph backend in Glance using ceph second pool. It adds new role "Ceph Glance
Backende" with volume partition assignment. This role can be used ONLY with standart
"Ceph OSD" role on node.
Compatible Fuel versions
------------------------
9.0
User Guide
----------
1. Create an environment with the Ceph default image backend for Glance.
2. Enable the plugin on the Settings/Storage tab of the Fuel web UI and fill in form
fields:
* Ceph pool name - name for new ceph pool
3. Select new node with roles Ceph OSD *AND* Ceph Glance Backend
4. Configure Disks on new node, chose at least one whole disk for role Ceph Glance Backend
and one for role Ceph-OSD
5. Deploy the environment.
Installation Guide
==================
Ceph Multibackend Plugin for Fuel installation
----------------------------------------------
To install Ceph Multibackend plugin, follow these steps:
1. Download the plugin
git clone https://github.com/openstack/fuel-plugin-ceph-multibackend
2. Copy the plugin on already installed Fuel Master node; ssh can be used for
that. If you do not have the Fuel Master node yet, see
[Quick Start Guide](https://software.mirantis.com/quick-start/):
# scp fuel-plugin-ceph_multibackend-1.7.1-1.noarch.rpm root@<Fuel_master_ip>:/tmp
3. Log into the Fuel Master node. Install the plugin:
# cd /tmp
# fuel plugins --install fuel-plugin-ceph_multibackend-1.7.1-1.noarch.rpm
4. Check if the plugin was installed successfully:
# fuel plugins
id | name | version | package_version
---|---------------------------------|---------|----------------
1 | fuel-plugin-ceph_multibackend | 1.7.1 | 4.0.0
Requirements
------------
| Requirement | Version/Comment |
|:---------------------------------|:----------------|
| Mirantis OpenStack compatibility | 9.0 |
Limitations
-----------
Role Ceph Glance Backend can be used only on nodes with active Ceph OSD role.

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- name: 'storage:image:ceph2'
label: 'Ceph SSD'
description: 'Separate osd pool for Ceph Images. Requires Ceph Image Storage option.'
requires:
- name: 'storage:image:ceph'
compatible:
- name: 'hypervisor:libvirt:*'
- name: 'storage:block:ceph'
- name: 'storage:object:ceph'
- name: 'storage:image:ceph'
- name: 'storage:ephemeral:ceph'

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include fuel-plugin-ceph_multibackend::ceph_auth
notice('MODULAR: fuel-plugin-ceph_multibackend/ceph_auth.pp')

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include fuel-plugin-ceph_multibackend::ceph_primary
notice('MODULAR: fuel-plugin-ceph_multibackend/ceph_primary.pp')

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include fuel-plugin-ceph_multibackend::controller
notice('MODULAR: fuel-plugin-ceph_multibackend/controller.pp')

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notice('MODULAR: fuel-plugin-ceph_multibackend/keys.pp')
exec { "gather keys":
command => "ceph-deploy --ceph-conf ~/ceph.conf gatherkeys localhost",
path => "/usr/bin",
}

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include fuel-plugin-ceph_multibackend::osd
notice('MODULAR: fuel-plugin-ceph_multibackend/osd.pp')

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include fuel-plugin-ceph_multibackend::osd_id
notice('MODULAR: fuel-plugin-ceph_multibackend/osd_id.pp')

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include fuel-plugin-ceph_multibackend::regions
notice('MODULAR: fuel-plugin-ceph_multibackend/regions.pp')

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#
# partitions.rb
# BY kwilczynski (https://github.com/kwilczynski/facter-facts/blob/master/partitions.rb)
# This fact provides an alphabetic list of blocks per disk and/or partition,
# partitions per disk and disks.
#
# We support most of generic SATA and PATA disks, plus Hewlett-Packard
# Smart Array naming format ... This also should work for systems running
# as Virtual Machine guest at least for Xen and KVM ...
#
if Facter.value(:kernel) == 'Linux'
# We store a list of disks (or block devices if you wish) here ...
disks = []
# We store number of blocks per disk and/or partition here ...
blocks = {}
# We store a list of partitions on per-disk basis here ...
partitions = Hash.new { |k,v| k[v] = [] }
#
# Support for the following might not be of interest ...
#
# MMC is Multi Media Card which can be either SD or microSD, etc ...
# MTD is Memory Technology Device also known as Flash Memory
#
exclude = %w(backdev.* dm-\d loop mmcblk mtdblock ram ramzswap)
#
# Modern Linux kernels provide "/proc/partitions" in the following format:
#
# major minor #blocks name
#
# 8 0 244198584 sda
# 8 1 3148708 sda1
# 8 2 123804922 sda2
# 8 3 116214210 sda3
# 8 4 1028160 sda4
#
# Make regular expression form our patterns ...
exclude = Regexp.union(*exclude.collect { |i| Regexp.new(i) })
#
# We utilise rely on "cat" for reading values from entries under "/proc".
# This is due to some problems with IO#read in Ruby and reading content of
# the "proc" file system that was reported more than once in the past ...
#
Facter::Util::Resolution.exec('cat /proc/partitions 2> /dev/null').each_line do |line|
# Remove bloat ...
line.strip!
# Line of interest should start with a number ...
next if line.empty? or line.match(/^[a-zA-Z]+/)
# We have something, so let us apply our device type filter ...
next if line.match(exclude)
# Only blocks and partitions matter ...
block = line.split(/\s+/)[2]
partition = line.split(/\s+/)[3]
if partition.match(/^cciss/)
#
# Special case for Hewlett-Packard Smart Array which probably
# nobody is using any more nowadays anyway ...
#
partition = partition.split('/')[1]
if match = partition.match(/^([a-zA-Z0-9]+)[pP][0-9]+/)
# Handle the case when "cciss/c0d0p1" is given ...
disk = match[1]
elsif partition.match(/^[a-zA-Z0-9]+/)
# Handle the case when "cciss/c0d0" is given ...
disk = partition
end
else
# Take care of any partitions create atop of the
# Linux Software RAID decies like e.g. /dev/md0, etc.
if match = partition.match(/^(md\d+)/)
disk = match[1]
else
# Everything else ...
disk = partition.scan(/^[a-zA-Z]+/)
end
end
# Convert back into a string value ...
disk = Array(disk).first.to_s
# We have something rather odd that did not parse at all, so ignore ...
next if disk.empty?
# All disks ... This might even be sda, sdaa, sdab, sdac, etc ...
disks << disk
# Store details about number of blocks per disk and/or partition ...
blocks[partition] = block
# A disk is not a partition, therefore we ignore ...
partitions[disk] << partition unless partition == disk
end
Facter.add('disks') do
confine :kernel => :linux
setcode { disks.sort.uniq.join(',') }
end
blocks.each do |k,v|
Facter.add("blocks_#{k}") do
confine :kernel => :linux
setcode { v }
end
end
partitions.each do |k,v|
Facter.add("partitions_#{k}") do
confine :kernel => :linux
# To ensure proper sorting order by the interface name ...
v = v.sort_by { |i| i.scan(/\d+/).shift.to_i }
setcode { v.sort.join(',') }
end
end
end

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Facter.add(:volume_rbd_pool) do
setcode do
volume_rbd_pool = Facter::Util::Resolution.exec('rados lspools | grep volume; echo $?')
end
end
Facter.add(:image_rbd_pool) do
setcode do
image_rbd_pool = Facter::Util::Resolution.exec('rados lspools | grep image; echo $?')
end
end

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Facter.add(:rbd_secret) do
setcode do
rbd_secret = Facter::Util::Resolution.exec('grep ^rbd_secret_uuid /etc/cinder/cinder.conf | cut -d"=" -f2 | head -1')
end
end

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module Puppet::Parser::Functions
newfunction(:get_all_osd_id, :type => :rvalue) do |args|
all_osd_id = `find /var/log/lost+found/ -maxdepth 1 | cut -d"/" -f5`
return all_osd_id
end
end

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module Puppet::Parser::Functions
newfunction(:get_disks, :type => :rvalue, :doc => <<-EOS
Return a list of disks (node roles are keys) that have the given node role.
example:
get_disks_list_by_role($node_volumes, 'cinder')
EOS
) do |args|
disks_metadata, role = args
disks = Array.new
disks_metadata.each do |disk|
disk['volumes'].each do |volume|
if volume['name'] == role and volume['size'] != 0 then
disks << disk['name']
end
end
end
return disks
end
end
# vim: set ts=2 sw=2 et :

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module Puppet::Parser::Functions
newfunction(:get_osd_id, :type => :rvalue) do |args|
device = args
dev = device.join("")
osd_id = `mount | grep #{dev} | cut -d" " -f3 | cut -d"-" -f2`
osd_id.delete!("\n")
return osd_id
end
end
# vim: set ts=2 sw=2 et :

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module Puppet::Parser::Functions
newfunction(:get_primary_node, :type => :rvalue, :doc => <<-EOS
Return a primary node fqdn that have specific node role.
example:
get_target_disk($nodes_hash, 'primaray-controller')
EOS
) do |args|
node_hash, role = args
noda = Array.new
node_hash.each do |node|
if node['role'] == role then
noda << node['fqdn']
end
end
return noda
end
end
# vim: set ts=2 sw=2 et

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module Puppet::Parser::Functions
newfunction(:get_target_disk, :type => :rvalue, :doc => <<-EOS
Return a list of disks (node roles are keys) that have the given node role.
example:
get_target_disk($node_volumes, 'cinder')
EOS
) do |args|
disks_metadata, role = args
disks = Array.new
disks_metadata.each do |disk|
disk['volumes'].each do |volume|
if volume['name'] == role and volume['size'] != 0 then
disks << disk['name']
end
end
end
return disks
end
end
# vim: set ts=2 sw=2 et :

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class fuel-plugin-ceph_multibackend::ceph_auth {
$plugin_settings = hiera('fuel-plugin-ceph_multibackend')
$ssd_pool=$plugin_settings['ceph_pool']
Exec { path => '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin' }
#image_rbd_pool and volume_rbd_pool from facter, in case of fuel > 9.0
if $image_rbd_pool == '0' {
exec { "Update auth caps for ssd pool":
command => "ceph auth caps client.images osd \"allow class-read object_prefix rbd_children, allow rwx pool=$ssd_pool\" mon \"allow r\"",
}
}
if $volume_rbd_pool == '0' {
exec { "Update auth caps for volumes client":
command => "ceph auth caps client.volumes osd \"allow class-read object_prefix rbd_children, allow rwx pool=$ssd_pool, allow rwx pool=volumes, allow rwx pool=images, allow rwx pool=compute\" mon \"allow r\"",
}
}
exec { "Update auth caps for compute client":
command => "ceph auth caps client.compute osd \"allow class-read object_prefix rbd_children, allow rwx pool=$ssd_pool, allow rwx pool=volumes, allow rwx pool=images, allow rwx pool=compute\" mon \"allow r\"",
}
}

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class fuel-plugin-ceph_multibackend::ceph_primary {
include ::cinder::params
Exec { path => '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin' }
$access_hash = hiera(access)
$pass = $access_hash['password']
$user = $access_hash['user']
$tenant = $access_hash['tenant']
$service_endpoint = hiera(service_endpoint)
$management_vip = hiera(management_vip)
$auth_uri = "http://$service_endpoint:5000/"
$plugin_settings = hiera('fuel-plugin-ceph_multibackend')
$ssd_pool=$plugin_settings['ceph_pool']
$ssd_pg_num = $plugin_settings['ceph_ssd_pg_num']
$HDD_pg_num = $plugin_settings['ceph_HDD_pg_num']
$file_ma_crush_new_map_exists = inline_template("<% if File.exist?('/var/log/lost+found/ma-crush-new-map') -%>true<% end -%>")
$file_cinder_type_lock_exists = inline_template("<% if File.exist?('/var/log/lost+found/cinder_ceph_type.lock') -%>true<% end -%>")
if $management_vip == $service_endpoint { #in case of local keystone
$region='RegionOne'
}
else { #in case of detach keystone
$region=hiera(region)
}
if $file_ma_crush_new_map_exists == ''
{
exec { "add HDD region to root":
command => "ceph osd crush move HDD root=default",
}
->
exec { "add SSD region to root":
command => "ceph osd crush move SSD root=default",
}
->
exec { "Get Crushmap":
command => "ceph osd getcrushmap -o /var/log/lost+found/ma-crush-map",
}
->
exec { "Decompile crushmap":
command => "crushtool -d /var/log/lost+found/ma-crush-map -o /var/log/lost+found/ma-crush-map.txt"
}
->
file_line { "Adding ssd rule":
path => "/var/log/lost+found/ma-crush-map.txt",
line => "rule ssd {\n ruleset 255\n type replicated\n min_size 1\n max_size 10\n step take SSD\n step choose firstn 0 type osd\n step emit\n}",
after => "# rules",
}
->
file_line { "Adding HDD rule":
path => "/var/log/lost+found/ma-crush-map.txt",
line => "rule HDD {\n ruleset 254\n type replicated\n min_size 1\n max_size 10\n step take HDD\n step choose firstn 0 type osd\n step emit\n}",
after => "# rules",
}
->
exec { "Compile Crushmap":
command => "crushtool -c /var/log/lost+found/ma-crush-map.txt -o /var/log/lost+found/ma-crush-new-map",
}
->
exec { "Upload Crushmap":
command => "ceph osd setcrushmap -i /var/log/lost+found/ma-crush-new-map",
}
->
exec { "Make ssd pool":
command => "ceph osd pool create $ssd_pool $ssd_pg_num",
}
->
exec { "Make HDD pool":
command => "ceph osd pool create HDD $HDD_pg_num",
}
->
exec { "Set crushmap ruleset for ssd":
command => "ceph osd pool set $ssd_pool crush_ruleset 255",
}
->
exec { "Set crushmap ruleset for HDD":
command => "ceph osd pool set HDD crush_ruleset 254",
}
if $file_cinder_type_lock_exists == '' {
exec {"cinder type":
command => "cinder --os-username $user --os-password $pass --os-project-name $tenant --os-tenant-name $tenant --os-auth-url $auth_uri --os-region-name $region type-create SSD_volumes_ceph",
}->
exec{"cinder type-key":
command => "cinder --os-username $user --os-password $pass --os-project-name $tenant --os-tenant-name $tenant --os-auth-url $auth_uri --os-region-name $region type-key SSD_volumes_ceph set volume_backend_name=RBD-fast",
}
file {"/var/log/lost+found/cinder_ceph_type.lock":
path => "/var/log/lost+found/cinder_ceph_type.lock",
ensure => "file",
}
}
}
}

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class fuel-plugin-ceph_multibackend::controller {
include ::glance::params
include ::cinder::params
$plugin_settings = hiera('fuel-plugin-ceph_multibackend')
$ssd_pool=$plugin_settings['ceph_pool']
glance_api_config {
"glance_store/rbd_store_pool": value => "$ssd_pool";
}
Glance_api_config<||> ~> Service['glance-api']
service { 'glance-api':
ensure => 'running',
enable => true,
}
file_line{"RBD-fast backend":
ensure => present,
path => "/etc/cinder/cinder.conf",
line => "[RBD-fast]",
}
->
file_line {"enable second volume backend":
path => "/etc/cinder/cinder.conf",
match => "^enabled_backends = RBD-backend$",
line => "enabled_backends = RBD-backend, RBD-fast",
}
->
cinder_config {
"RBD-fast/volume_backend_name": value => "RBD-fast";
"RBD-fast/rbd_pool": value => "$ssd_pool";
"RBD-fast/rbd_user": value => "volumes";
"RBD-fast/rbd_secret_uuid": value => "$rbd_secret";
"RBD-fast/backend_host": value => "rbd:volumes";
"RBD-fast/volume_driver": value => "cinder.volume.drivers.rbd.RBDDriver";
"RBD-fast/rbd_ceph_conf": value => "/etc/ceph/ceph.conf";
"RBD-backend/rbd_pool": value => "volumes";
}
Cinder_config<||> ~> Service['cinder-volume']
Cinder_config<||> ~> Service['cinder-scheduler']
service { 'cinder-volume':
ensure => 'running',
enable => true,
}
service { 'cinder-scheduler':
ensure => 'running',
enable => true,
}
}

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class fuel-plugin-ceph_multibackend {}

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class fuel-plugin-ceph_multibackend::osd {
Exec { path => '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin' }
$node_volumes = hiera('node_volumes', [])
$dev = get_target_disk($node_volumes, 'ceph-backend2')
$plugin_settings = hiera('fuel-plugin-ceph_multibackend')
$file_osd_id_exists = inline_template("<% if File.exist?('/var/log/lost+found/osd_create.lock') -%>true<% end -%>")
define process_osd {
$part = "partitions_${name}"
$target_part = inline_template("<%= scope.lookupvar(part) %>")
$target_part_arr = split($target_part,",")
$arr_len=size($target_part_arr)
exec { "Prepare OSD $name":
command => "ceph-deploy --ceph-conf /root/ceph.conf osd prepare localhost:$name$arr_len"
}
->
exec { "Activate OSD $name":
command => "ceph-deploy --ceph-conf /root/ceph.conf osd activate localhost:$name$arr_len",
tries => 2,
}
}
if $file_osd_id_exists == ''
{
process_osd { $dev : }
}
}

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class fuel-plugin-ceph_multibackend::osd_id {
Exec { path => '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin' }
$node_volumes = hiera('node_volumes', [])
$dev = get_target_disk($node_volumes, 'ceph-backend2')
$plugin_settings = hiera('fuel-plugin-ceph_multibackend')
$file_osd_id_exists = inline_template("<% if File.exist?('/var/log/lost+found/osd_create.lock') -%>true<% end -%>")
$node_name=hiera(node_name)
define crush_osd {
$osd_id = get_osd_id($name)
$node_name=hiera(node_name)
exec { "Removing ssd $name osd from host HDD bucket":
command => "ceph osd crush remove osd.$osd_id $node_name.HDD",
}
->
exec { "Adding ssd $name item to SSD bucket":
command => "ceph osd crush add osd.$osd_id 1.0 host=$node_name.SSD",
}
}
if $file_osd_id_exists == ''
{
exec { "Creating new SSD bucket":
command => "ceph osd crush add-bucket $node_name.SSD host",
}
->
exec { "Renaming old bucket":
command => "ceph osd crush rename-bucket $node_name $node_name.HDD",
}
->
exec { "Adding ssd host to SSD region":
command => "ceph osd crush move $node_name.SSD region=SSD",
}
->
exec { "Adding HDD host to HDD region":
command => "ceph osd crush move $node_name.HDD region=HDD",
}
->
crush_osd { $dev : }
->
file {"/var/log/lost+found":
ensure => 'directory',
}
->
file {"/var/log/lost+found/osd_create.lock":
ensure => 'file',
path => "/var/log/lost+found/osd_create.lock",
}
}
}

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class fuel-plugin-ceph_multibackend::regions {
Exec { path => '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin' }
$plugin_settings = hiera('fuel-plugin-ceph_multibackend')
exec { "creating SSD region":
command => "ceph osd crush add-bucket SSD region",
}->
exec { "creating HDD region":
command => "ceph osd crush add-bucket HDD region",
}
file {"/var/log/lost+found":
ensure => 'directory',
}
}

73
deployment_tasks.yaml Normal file
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- id: fp-ceph_multibackend-regions
role: ['primary-controller']
type: puppet
version: 2.0.0
parameters:
puppet_manifest: puppet/manifests/regions.pp
puppet_modules: puppet/modules:/etc/puppet/modules
timeout: 360
requires: [post_deployment_start]
required_for: [ceph_ready_check,upload_cirros]
- id: fp-ceph_multibackend-keys
role: ['ceph-backend2']
type: puppet
version: 2.0.0
parameters:
puppet_manifest: puppet/manifests/keys.pp
puppet_modules: puppet/modules:/etc/puppet/modules
timeout: 300
requires: [post_deployment_start,ceph_create_pools]
required_for: [upload_cirros,fp-ceph_multibackend-ceph-storage]
- id: fp-ceph_multibackend-ceph-storage
role: ['ceph-backend2']
type: puppet
version: 2.0.0
parameters:
puppet_manifest: puppet/manifests/osd.pp
puppet_modules: puppet/modules:/etc/puppet/modules
timeout: 1500
requires: [post_deployment_start,ceph_create_pools,fp-ceph_multibackend-keys]
required_for: [upload_cirros,fp-ceph_multibackend-ceph-osd-id]
- id: fp-ceph_multibackend-ceph-osd-id
role: ['ceph-backend2']
type: puppet
version: 2.0.0
parameters:
puppet_manifest: puppet/manifests/osd_id.pp
puppet_modules: puppet/modules:/etc/puppet/modules
timeout: 360
requires: [post_deployment_start,ceph_create_pools,fp-ceph_multibackend-ceph-storage,fp-ceph_multibackend-regions]
required_for: [fp-ceph_multibackend-ceph-primary,upload_cirros]
- id: fp-ceph_multibackend-ceph-primary
role: ['primary-controller']
type: puppet
version: 2.0.0
parameters:
puppet_manifest: puppet/manifests/ceph_primary.pp
puppet_modules: puppet/modules:/etc/puppet/modules
timeout: 360
requires: [post_deployment_start,ceph_create_pools,fp-ceph_multibackend-ceph-storage,fp-ceph_multibackend-ceph-osd-id]
required_for: [ceph_ready_check,upload_cirros]
cross-depends:
- name: fp-ceph_multibackend-ceph-osd-id
role: ['ceph-backend2']
- id: fp-ceph_multibackend-ceph-controller
role: ['primary-controller','controller']
type: puppet
version: 2.0.0
parameters:
puppet_manifest: puppet/manifests/controller.pp
puppet_modules: puppet/modules:/etc/puppet/modules
timeout: 360
requires: [post_deployment_start,ceph_create_pools]
required_for: [upload_cirros]
- id: fp-ceph_multibackend-ceph-auth-update
role: ['primary-controller']
type: puppet
version: 2.0.0
parameters:
puppet_manifest: puppet/manifests/ceph_auth.pp
puppet_modules: puppet/modules:/etc/puppet/modules
timeout: 360
requires: [post_deployment_start,ceph-compute]
required_for: [upload_cirros]

21
environment_config.yaml Normal file
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attributes:
metadata:
group: 'storage'
ceph_pool:
value: "SSD"
label: "Ceph pool name"
description: "Ceph pool name"
weight: 50
type: "text"
ceph_ssd_pg_num:
value: "1024"
label: "Number of Ceph placement group for SSD pool"
description: "osd_count*100/replica_count rounded to nearest power of two"
weight: 51
type: "text"
ceph_hdd_pg_num:
value: "8192"
label: "Number of Ceph placement group for HDD pool"
description: "osd_count*100/replica_count rounded to nearest power of two"
weight: 52
type: "text"

31
metadata.yaml Normal file
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# Plugin name
name: fuel-plugin-ceph-multibackend
title: Ceph multibackend for Cinder
# Plugin version
version: 1.8.4
# Description
description: Enables Ceph Multibackend in Cinder
# Required fuel version
fuel_version: ['9.0']
# Groups
groups: ['storage::cinder']
# Licenses
licenses: ['Apache License, Version 2.0']
# Authors
authors:
- Margarita Shakhova <margarita.shakhova@gmail.com>
homepage: https://github.com/openstack/fuel-plugin-ceph-multibackend
# Change `false` to `true` if the plugin can be installed in the environment
# after the deployment.
is_hotpluggable: true
# The plugin is compatible with releases in the list
releases:
- os: ubuntu
version: mitaka-9.0
mode: ['ha']
deployment_scripts_path: deployment_scripts/
repository_path: repositories/ubuntu
# Version of plugin package
package_version: '4.0.0'

6
node_roles.yaml Normal file
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ceph-backend2:
name: "Ceph SSD"
description: Ceph SSD backend
has_primary: false
public_ip_required: false
weight: 100

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1
tasks.yaml Normal file
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[]

14
volumes.yaml Normal file
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volumes:
- id: "ceph-backend2"
type: "partition"
min_size:
generator: "calc_gb_to_mb"
generator_args: [2]
label: "Ceph Glance Backend"
mount: "none"
file_system: "xfs"
volumes_roles_mapping:
ceph-backend2:
- {allocate_size: "min", id: "os"}
- {allocate_size: "all", id: "ceph-backend2"}