Class: OvirtSDK4::DisksService

Inherits:

Service

Object
Service
OvirtSDK4::DisksService

show all

Defined in:: lib/ovirtsdk4/services.rb,
lib/ovirtsdk4/services.rb

Instance Method Summary collapse

#add(disk, opts = {}) ⇒ Disk

Adds a new floating disk.
#add_lun(disk, opts = {}) ⇒ Disk

Add a new lun disk to the storage domain.
#add_on_storage_domain(disk, opts = {}) ⇒ Disk

Add a new disk to the storage domain with the specified size allocating space from the storage domain.
#disk_service(id) ⇒ DiskService

Reference to a service managing a specific disk.
#list(opts = {}) ⇒ Array<Disk>

Get list of disks.
#service(path) ⇒ Service

Locates the service corresponding to the given path.

Methods inherited from Service

#inspect, #to_s

Instance Method Details

#add(disk, opts = {}) ⇒ `Disk`

Adds a new floating disk.

There are three types of disks that can be added - disk image, direct LUN and Managed Block disk. Cinder integration has been replaced by Managed Block Storage.

Adding a new image disk:

When creating a new floating image Disk, the API requires the storage_domain, provisioned_size and format attributes.

Note that block storage domains (i.e. storage domains with the storage type of iSCSI or FCP) do not support the combination of the raw format with sparse=true, so sparse=false must be stated explicitly.

To create a new floating image disk with specified provisioned_size, format and name on a storage domain with an id 123 and enabled for incremental backup, send a request as follows:

POST /ovirt-engine/api/disks

With a request body as follows:

<disk>
  <storage_domains>
    <storage_domain id="123"/>
  </storage_domains>
  <name>mydisk</name>
  <provisioned_size>1048576</provisioned_size>
  <format>cow</format>
  <backup>incremental</backup>
</disk>

Adding a new direct LUN disk:

When adding a new floating direct LUN via the API, there are two flavors that can be used:

With a host element - in this case, the host is used for sanity checks (e.g., that the LUN is visible) and to retrieve basic information about the LUN (e.g., size and serial).
Without a host element - in this case, the operation is a database-only operation, and the storage is never accessed.

To create a new floating direct LUN disk with a host element with an id 123, specified alias, type and logical_unit with an id 456 (that has the attributes address, port and target), send a request as follows:

POST /ovirt-engine/api/disks

With a request body as follows:

<disk>
  <alias>mylun</alias>
  <lun_storage>
    <host id="123"/>
    <type>iscsi</type>
    <logical_units>
      <logical_unit id="456">
        <address>10.35.10.20</address>
        <port>3260</port>
        <target>iqn.2017-01.com.myhost:444</target>
      </logical_unit>
    </logical_units>
  </lun_storage>
</disk>

To create a new floating direct LUN disk without using a host, remove the host element.

Adding a new Cinder disk:

Cinder integration has been replaced by Managed Block Storage.

Adding a floating disks in order to upload disk snapshots:

Since version 4.2 of the engine it is possible to upload disks with snapshots. This request should be used to create the base image of the images chain (The consecutive disk snapshots (images), should be created using disk-attachments element when creating a snapshot).

The disk has to be created with the same disk identifier and image identifier of the uploaded image. I.e. the identifiers should be saved as part of the backup process. The image identifier can be also fetched using the qemu-img info command. For example, if the disk image is stored into a file named b7a4c6c5-443b-47c5-967f-6abc79675e8b/myimage.img:

$ qemu-img info b7a4c6c5-443b-47c5-967f-6abc79675e8b/myimage.img
image: b548366b-fb51-4b41-97be-733c887fe305
file format: qcow2
virtual size: 1.0G (1073741824 bytes)
disk size: 196K
cluster_size: 65536
backing file: ad58716a-1fe9-481f-815e-664de1df04eb
backing file format: raw

To create a disk with with the disk identifier and image identifier obtained with the qemu-img info command shown above, send a request like this:

POST /ovirt-engine/api/disks

With a request body as follows:

<disk id="b7a4c6c5-443b-47c5-967f-6abc79675e8b">
  <image_id>b548366b-fb51-4b41-97be-733c887fe305</image_id>
  <storage_domains>
    <storage_domain id="123"/>
  </storage_domains>
  <name>mydisk</name>
  <provisioned_size>1048576</provisioned_size>
  <format>cow</format>
</disk>

Parameters:

disk (Disk) —

The disk.
opts (Hash) (defaults to: {}) —

Additional options.

Options Hash (opts):

:headers (Hash) — default: {} —

Additional HTTP headers.
:query (Hash) — default: {} —

Additional URL query parameters.
:timeout (Integer) — default: nil —

The timeout for this request, in seconds. If no value is explicitly given then the timeout set globally for the connection will be used.
:wait (Boolean) — default: true —

If true wait for the response.

Returns:

(Disk)



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# File 'lib/ovirtsdk4/services.rb', line 7919

def add(disk, opts = {})
  internal_add(disk, Disk, ADD, opts)
end

#add_lun(disk, opts = {}) ⇒ `Disk`

Add a new lun disk to the storage domain.

Parameters:

disk (Disk) —

The disk.
opts (Hash) (defaults to: {}) —

Additional options.

Options Hash (opts):

:headers (Hash) — default: {} —

Additional HTTP headers.
:query (Hash) — default: {} —

Additional URL query parameters.
:timeout (Integer) — default: nil —

The timeout for this request, in seconds. If no value is explicitly given then the timeout set globally for the connection will be used.
:wait (Boolean) — default: true —

If true wait for the response.

Returns:

(Disk)



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# File 'lib/ovirtsdk4/services.rb', line 8019

def add_lun(disk, opts = {})
  internal_add(disk, Disk, ADD_LUN, opts)
end

#add_on_storage_domain(disk, opts = {}) ⇒ `Disk`

Add a new disk to the storage domain with the specified size allocating space from the storage domain.

Parameters:

disk (Disk) —

The disk.
opts (Hash) (defaults to: {}) —

Additional options.

Options Hash (opts):

:headers (Hash) — default: {} —

Additional HTTP headers.
:query (Hash) — default: {} —

Additional URL query parameters.
:timeout (Integer) — default: nil —

The timeout for this request, in seconds. If no value is explicitly given then the timeout set globally for the connection will be used.
:wait (Boolean) — default: true —

If true wait for the response.

Returns:

(Disk)



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# File 'lib/ovirtsdk4/services.rb', line 8046

def add_on_storage_domain(disk, opts = {})
  internal_add(disk, Disk, ADD_ON_STORAGE_DOMAIN, opts)
end

#disk_service(id) ⇒ `DiskService`

Reference to a service managing a specific disk.

Parameters:

id (String) —

The identifier of the disk.

Returns:

(DiskService) —

A reference to the disk service.



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# File 'lib/ovirtsdk4/services.rb', line 8057

def disk_service(id)
  DiskService.new(self, id)
end

#list(opts = {}) ⇒ `Array<Disk>`

Get list of disks.

GET /ovirt-engine/api/disks

You will get a XML response which will look like this one:

<disks>
  <disk id="123">
    <actions>...</actions>
    <name>MyDisk</name>
    <description>MyDisk description</description>
    <link href="/ovirt-engine/api/disks/123/permissions" rel="permissions"/>
    <link href="/ovirt-engine/api/disks/123/statistics" rel="statistics"/>
    <actual_size>5345845248</actual_size>
    <alias>MyDisk alias</alias>
    ...
    <status>ok</status>
    <storage_type>image</storage_type>
    <wipe_after_delete>false</wipe_after_delete>
    <disk_profile id="123"/>
    <quota id="123"/>
    <storage_domains>...</storage_domains>
  </disk>
  ...
</disks>

The order of the returned list of disks is guaranteed only if the sortby clause is included in the search parameter.

Parameters:

opts (Hash) (defaults to: {}) —

Additional options.

Options Hash (opts):

:case_sensitive (Boolean) —

Indicates if the search performed using the search parameter should be performed taking case into account. The default value is true, which means that case is taken into account. If you want to search ignoring case set it to false.
:follow (String) —

Indicates which inner links should be followed. The objects referenced by these links will be fetched as part of the current request. See here for details.
:max (Integer) —

Sets the maximum number of disks to return. If not specified all the disks are returned.
:search (String) —

A query string used to restrict the returned disks.
:headers (Hash) — default: {} —

Additional HTTP headers.
:query (Hash) — default: {} —

Additional URL query parameters.
:timeout (Integer) — default: nil —

The timeout for this request, in seconds. If no value is explicitly given then the timeout set globally for the connection will be used.
:wait (Boolean) — default: true —

If true wait for the response.

Returns:

(Array<Disk>)



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# File 'lib/ovirtsdk4/services.rb', line 7992

def list(opts = {})
  internal_get(LIST, opts)
end

#service(path) ⇒ `Service`

Locates the service corresponding to the given path.

Parameters:

path (String) —

The path of the service.

Returns:

(Service) —

A reference to the service.

# File 'lib/ovirtsdk4/services.rb', line 8068

def service(path)
  if path.nil? || path == ''
    return self
  end
  index = path.index('/')
  if index.nil?
    return disk_service(path)
  end
  return disk_service(path[0..(index - 1)]).service(path[(index + 1)..-1])
end

Class: OvirtSDK4::DisksService

Instance Method Summary collapse

Methods inherited from Service

Instance Method Details

#add(disk, opts = {}) ⇒ Disk

#add_lun(disk, opts = {}) ⇒ Disk

#add_on_storage_domain(disk, opts = {}) ⇒ Disk

#disk_service(id) ⇒ DiskService

#list(opts = {}) ⇒ Array<Disk>

#service(path) ⇒ Service

#add(disk, opts = {}) ⇒ `Disk`

#add_lun(disk, opts = {}) ⇒ `Disk`

#add_on_storage_domain(disk, opts = {}) ⇒ `Disk`

#disk_service(id) ⇒ `DiskService`

#list(opts = {}) ⇒ `Array<Disk>`

#service(path) ⇒ `Service`