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#
# Author:: Joe Williams (<joe@joetify.com>)
# Author:: Tyler Cloke (<tyler@chef.io>)
# Copyright:: Copyright 2009-2016, Joe Williams
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
require_relative "../resource"
class Chef
class Resource
class Mdadm < Chef::Resource
unified_mode true
provides :mdadm
description "Use the **mdadm** resource to manage RAID devices in a Linux environment using the mdadm utility. The mdadm resource"\
" will create and assemble an array, but it will not create the config file that is used to persist the array upon"\
" reboot. If the config file is required, it must be done by specifying a template with the correct array layout,"\
" and then by using the mount provider to create a file systems table (fstab) entry."
examples <<~DOC
**Create and assemble a RAID 0 array**
The mdadm command can be used to create RAID arrays. For example, a RAID 0 array named /dev/md0 with 10 devices would have a command similar to the following:
```
mdadm --create /dev/md0 --level=0 --raid-devices=10 /dev/s01.../dev/s10
```
where /dev/s01 .. /dev/s10 represents 10 devices (01, 02, 03, and so on). This same command, when expressed as a recipe using the mdadm resource, would be similar to:
```ruby
mdadm '/dev/md0' do
devices [ '/dev/s01', ... '/dev/s10' ]
level 0
action :create
end
```
(again, where /dev/s01 .. /dev/s10 represents devices /dev/s01, /dev/s02, /dev/s03, and so on).
**Create and assemble a RAID 1 array**
```ruby
mdadm '/dev/md0' do
devices [ '/dev/sda', '/dev/sdb' ]
level 1
action [ :create, :assemble ]
end
```
**Create and assemble a RAID 5 array**
The mdadm command can be used to create RAID arrays. For example, a RAID 5 array named /dev/sd0 with 4, and a superblock type of 0.90 would be similar to:
```ruby
mdadm '/dev/sd0' do
devices [ '/dev/s1', '/dev/s2', '/dev/s3', '/dev/s4' ]
level 5
metadata '0.90'
chunk 32
action :create
end
```
DOC
default_action :create
allowed_actions :create, :assemble, :stop
property :chunk, Integer,
default: 16,
description: "The chunk size. This property should not be used for a RAID 1 mirrored pair (i.e. when the `level` property is set to `1`)."
property :devices, Array,
default: [],
description: "The devices to be part of a RAID array."
# @todo this should get refactored away
property :exists, [ TrueClass, FalseClass ],
default: false,
skip_docs: true
property :level, Integer,
default: 1,
description: "The RAID level."
property :metadata, String,
default: "0.90",
description: "The superblock type for RAID metadata."
property :bitmap, String,
description: "The path to a file in which a write-intent bitmap is stored."
property :raid_device, String,
name_property: true,
description: "An optional property to specify the name of the RAID device if it differs from the resource block's name."
property :layout, String,
description: "The RAID5 parity algorithm. Possible values: `left-asymmetric` (or `la`), `left-symmetric` (or ls), `right-asymmetric` (or `ra`), or `right-symmetric` (or `rs`)."
action_class do
def load_current_resource
@current_resource = Chef::Resource::Mdadm.new(new_resource.name)
current_resource.raid_device(new_resource.raid_device)
logger.trace("#{new_resource} checking for software raid device #{current_resource.raid_device}")
device_not_found = 4
mdadm = shell_out!("mdadm", "--detail", "--test", new_resource.raid_device, returns: [0, device_not_found])
exists = (mdadm.status == 0)
current_resource.exists(exists)
end
end
action :create, description: "Create an array with per-device superblocks. If an array already exists (but does not match), update that array to match." do
unless current_resource.exists
converge_by("create RAID device #{new_resource.raid_device}") do
command = "yes | mdadm --create #{new_resource.raid_device} --level #{new_resource.level}"
command << " --chunk=#{new_resource.chunk}" unless new_resource.level == 1
command << " --metadata=#{new_resource.metadata}"
command << " --bitmap=#{new_resource.bitmap}" if new_resource.bitmap
command << " --layout=#{new_resource.layout}" if new_resource.layout
command << " --raid-devices #{new_resource.devices.length} #{new_resource.devices.join(" ")}"
logger.trace("#{new_resource} mdadm command: #{command}")
shell_out!(command)
logger.info("#{new_resource} created raid device (#{new_resource.raid_device})")
end
else
logger.debug("#{new_resource} raid device already exists, skipping create (#{new_resource.raid_device})")
end
end
action :assemble, description: "Assemble a previously created array into an active array." do
unless current_resource.exists
converge_by("assemble RAID device #{new_resource.raid_device}") do
command = "yes | mdadm --assemble #{new_resource.raid_device} #{new_resource.devices.join(" ")}"
logger.trace("#{new_resource} mdadm command: #{command}")
shell_out!(command)
logger.info("#{new_resource} assembled raid device (#{new_resource.raid_device})")
end
else
logger.debug("#{new_resource} raid device already exists, skipping assemble (#{new_resource.raid_device})")
end
end
action :stop, description: "Stop an active array." do
if current_resource.exists
converge_by("stop RAID device #{new_resource.raid_device}") do
command = "yes | mdadm --stop #{new_resource.raid_device}"
logger.trace("#{new_resource} mdadm command: #{command}")
shell_out!(command)
logger.info("#{new_resource} stopped raid device (#{new_resource.raid_device})")
end
else
logger.debug("#{new_resource} raid device doesn't exist (#{new_resource.raid_device}) - not stopping")
end
end
end
end
end
|
