dd1a416bc9
This ensures we have version-specific references to other projects [1]. Note that this doesn't mean the URLs are actually valid - we need to do more work (linkcheck?) here, but it's an improvement nonetheless. [1] https://docs.openstack.org/openstackdocstheme/latest/#external-link-helper Change-Id: Ifb99e727110c4904a85bc4a13366c2cae300b8df
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376 lines
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ReStructuredText
================================
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Launch an instance from a volume
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================================
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You can boot instances from a volume instead of an image.
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To complete these tasks, use these parameters on the
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:command:`openstack server create` command:
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.. tabularcolumns:: |p{0.3\textwidth}|p{0.25\textwidth}|p{0.4\textwidth}|
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.. list-table::
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:header-rows: 1
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:widths: 30 15 30
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* - Task
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- openstack server create parameter
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- Information
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* - Boot an instance from an image and attach a non-bootable
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volume.
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- ``--block-device``
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- :ref:`Boot_instance_from_image_and_attach_non-bootable_volume`
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* - Create a volume from an image and boot an instance from that
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volume.
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- ``--block-device``
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- :ref:`Create_volume_from_image_and_boot_instance`
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* - Boot from an existing source image, volume, or snapshot.
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- ``--block-device``
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- :ref:`Create_volume_from_image_and_boot_instance`
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* - Attach a swap disk to an instance.
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- ``--swap``
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- :ref:`Attach_swap_or_ephemeral_disk_to_an_instance`
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* - Attach an ephemeral disk to an instance.
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- ``--ephemeral``
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- :ref:`Attach_swap_or_ephemeral_disk_to_an_instance`
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.. note::
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To attach a volume to a running instance, refer to the
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:cinder-doc:`Cinder documentation
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<cli/cli-manage-volumes.html#attach-a-volume-to-an-instance>`.
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.. _Boot_instance_from_image_and_attach_non-bootable_volume:
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Boot instance from image and attach non-bootable volume
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Create a non-bootable volume and attach that volume to an instance that
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you boot from an image.
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To create a non-bootable volume, do not create it from an image. The
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volume must be entirely empty with no partition table and no file
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system.
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#. Create a non-bootable volume.
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.. code-block:: console
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$ openstack volume create --size 8 my-volume
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+---------------------+--------------------------------------+
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| Field | Value |
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+---------------------+--------------------------------------+
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| attachments | [] |
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| availability_zone | nova |
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| bootable | false |
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| consistencygroup_id | None |
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| created_at | 2016-11-25T10:37:08.850997 |
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| description | None |
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| encrypted | False |
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| id | b8f7bbec-6274-4cd7-90e7-60916a5e75d4 |
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| migration_status | None |
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| multiattach | False |
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| name | my-volume |
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| properties | |
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| replication_status | disabled |
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| size | 8 |
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| snapshot_id | None |
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| source_volid | None |
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| status | creating |
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| type | None |
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| updated_at | None |
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| user_id | 0678735e449149b0a42076e12dd54e28 |
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+---------------------+--------------------------------------+
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#. List volumes.
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.. code-block:: console
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$ openstack volume list
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+--------------------------------------+--------------+-----------+------+-------------+
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| ID | Display Name | Status | Size | Attached to |
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+--------------------------------------+--------------+-----------+------+-------------+
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| b8f7bbec-6274-4cd7-90e7-60916a5e75d4 | my-volume | available | 8 | |
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+--------------------------------------+--------------+-----------+------+-------------+
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#. Boot an instance from an image and attach the empty volume to the
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instance.
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.. code-block:: console
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$ openstack server create --flavor 2 --image 98901246-af91-43d8-b5e6-a4506aa8f369 \
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--block-device source=volume,id=d620d971-b160-4c4e-8652-2513d74e2080,dest=volume,shutdown=preserve \
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myInstanceWithVolume
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+--------------------------------------+--------------------------------------------+
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| Field | Value |
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+--------------------------------------+--------------------------------------------+
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| OS-DCF:diskConfig | MANUAL |
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| OS-EXT-AZ:availability_zone | nova |
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| OS-EXT-SRV-ATTR:host | - |
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| OS-EXT-SRV-ATTR:hypervisor_hostname | - |
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| OS-EXT-SRV-ATTR:instance_name | instance-00000004 |
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| OS-EXT-STS:power_state | 0 |
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| OS-EXT-STS:task_state | scheduling |
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| OS-EXT-STS:vm_state | building |
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| OS-SRV-USG:launched_at | - |
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| OS-SRV-USG:terminated_at | - |
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| accessIPv4 | |
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| accessIPv6 | |
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| adminPass | ZaiYeC8iucgU |
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| config_drive | |
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| created | 2014-05-09T16:34:50Z |
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| flavor | m1.small (2) |
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| hostId | |
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| id | 1e1797f3-1662-49ff-ae8c-a77e82ee1571 |
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| image | cirros-0.3.5-x86_64-uec (98901246-af91-... |
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| key_name | - |
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| metadata | {} |
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| name | myInstanceWithVolume |
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| os-extended-volumes:volumes_attached | [{"id": "d620d971-b160-4c4e-8652-2513d7... |
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| progress | 0 |
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| security_groups | default |
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| status | BUILD |
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| tenant_id | ccef9e62b1e645df98728fb2b3076f27 |
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| updated | 2014-05-09T16:34:51Z |
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| user_id | fef060ae7bfd4024b3edb97dff59017a |
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+--------------------------------------+--------------------------------------------+
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.. _Create_volume_from_image_and_boot_instance:
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Create volume from image and boot instance
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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You can create a volume from an existing image, volume, or snapshot.
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This procedure shows you how to create a volume from an image, and use
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the volume to boot an instance.
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#. List the available images.
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.. code-block:: console
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$ openstack image list
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+-----------------+---------------------------------+--------+
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| ID | Name | Status |
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+-----------------+---------------------------------+--------+
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| 484e05af-a14... | Fedora-x86_64-20-20131211.1-sda | active |
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| 98901246-af9... | cirros-0.3.5-x86_64-uec | active |
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| b6e95589-7eb... | cirros-0.3.5-x86_64-uec-kernel | active |
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| c90893ea-e73... | cirros-0.3.5-x86_64-uec-ramdisk | active |
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+-----------------+---------------------------------+--------+
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Note the ID of the image that you want to use to create a volume.
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If you want to create a volume to a specific storage backend, you need
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to use an image which has *cinder_img_volume_type* property.
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In this case, a new volume will be created as *storage_backend1* volume
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type.
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.. code-block:: console
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$ openstack image show 98901246-af9d-4b61-bea8-09cc6dc41829
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+------------------+------------------------------------------------------+
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| Field | Value |
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+------------------+------------------------------------------------------+
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| checksum | ee1eca47dc88f4879d8a229cc70a07c6 |
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| container_format | bare |
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| created_at | 2016-10-08T14:59:05Z |
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| disk_format | qcow2 |
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| file | /v2/images/9fef3b2d-c35d-4b61-bea8-09cc6dc41829/file |
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| id | 98901246-af9d-4b61-bea8-09cc6dc41829 |
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| min_disk | 0 |
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| min_ram | 0 |
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| name | cirros-0.3.5-x86_64-uec |
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| owner | 8d8ef3cdf2b54c25831cbb409ad9ae86 |
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| protected | False |
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| schema | /v2/schemas/image |
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| size | 13287936 |
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| status | active |
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| tags | |
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| updated_at | 2016-10-19T09:12:52Z |
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| virtual_size | None |
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| visibility | public |
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+------------------+------------------------------------------------------+
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#. List the available flavors.
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.. code-block:: console
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$ openstack flavor list
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+-----+-----------+-------+------+-----------+-------+-----------+
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| ID | Name | RAM | Disk | Ephemeral | VCPUs | Is_Public |
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+-----+-----------+-------+------+-----------+-------+-----------+
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| 1 | m1.tiny | 512 | 1 | 0 | 1 | True |
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| 2 | m1.small | 2048 | 20 | 0 | 1 | True |
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| 3 | m1.medium | 4096 | 40 | 0 | 2 | True |
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| 4 | m1.large | 8192 | 80 | 0 | 4 | True |
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| 5 | m1.xlarge | 16384 | 160 | 0 | 8 | True |
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+-----+-----------+-------+------+-----------+-------+-----------+
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Note the ID of the flavor that you want to use to create a volume.
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#. To create a bootable volume from an image and launch an instance from
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this volume, use the ``--block-device`` parameter.
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For example:
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.. code-block:: console
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$ openstack server create --flavor FLAVOR --block-device \
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source=SOURCE,id=ID,dest=DEST,size=SIZE,shutdown=PRESERVE,bootindex=INDEX \
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NAME
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The parameters are:
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- ``--flavor``
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The flavor ID or name.
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- ``--block-device``
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source=SOURCE,id=ID,dest=DEST,size=SIZE,shutdown=PRESERVE,bootindex=INDEX
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**source=SOURCE**
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The type of object used to create the block device. Valid values
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are ``volume``, ``snapshot``, ``image``, and ``blank``.
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**id=ID**
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The ID of the source object.
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**dest=DEST**
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The type of the target virtual device. Valid values are ``volume``
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and ``local``.
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**size=SIZE**
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The size of the volume that is created.
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**shutdown={preserve\|remove}**
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What to do with the volume when the instance is deleted.
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``preserve`` does not delete the volume. ``remove`` deletes the
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volume.
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**bootindex=INDEX**
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Orders the boot disks. Use ``0`` to boot from this volume.
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- ``NAME``. The name for the server.
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See :doc:`block-device-mapping` for more details on these parameters.
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#. Create a bootable volume from an image. Cinder makes a volume bootable
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when ``--image`` parameter is passed.
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.. code-block:: console
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$ openstack volume create --image IMAGE_ID --size SIZE_IN_GB bootable_volume
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.. note::
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A bootable encrypted volume can also be created by adding the
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`-–type ENCRYPTED_VOLUME_TYPE` parameter to the volume create command:
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.. code-block:: console
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$ openstack volume create --type ENCRYPTED_VOLUME_TYPE --image IMAGE_ID --size SIZE_IN_GB bootable_volume
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+---------------------+--------------------------------------+
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| Field | Value |
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+---------------------+--------------------------------------+
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| attachments | [] |
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| availability_zone | nova |
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| bootable | false |
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| consistencygroup_id | None |
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| created_at | 2017-06-13T18:59:57.626872 |
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| description | None |
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| encrypted | True |
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| id | ded57a86-5b51-43ab-b70e-9bc0f91ef4ab |
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| multiattach | False |
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| name | bootable_volume |
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| properties | |
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| replication_status | None |
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| size | 1 |
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| snapshot_id | None |
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| source_volid | None |
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| status | creating |
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| type | LUKS |
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| updated_at | None |
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| user_id | 459ae34ffcd94edab0c128ed616bb19f |
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+---------------------+--------------------------------------+
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This requires an encrypted volume type, which must be created ahead of
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time by an admin. Refer to
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:horizon-doc:`admin/manage-volumes.html#create-an-encrypted-volume-type`.
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in the OpenStack Horizon Administration Guide.
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#. Create a VM from previously created bootable volume. The volume is not
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deleted when the instance is terminated.
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.. code-block:: console
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$ openstack server create --flavor 2 --volume VOLUME_ID \
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--block-device source=volume,id=$VOLUME_ID,dest=volume,size=10,shutdown=preserve,bootindex=0 \
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myInstanceFromVolume
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+--------------------------------------+--------------------------------+
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| Field | Value |
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+--------------------------------------+--------------------------------+
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| OS-EXT-STS:task_state | scheduling |
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| image | Attempt to boot from volume |
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| | - no image supplied |
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| OS-EXT-STS:vm_state | building |
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| OS-EXT-SRV-ATTR:instance_name | instance-00000003 |
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| OS-SRV-USG:launched_at | None |
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| flavor | m1.small |
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| id | 2e65c854-dba9-4f68-8f08-fe3... |
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| security_groups | [{u'name': u'default'}] |
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| user_id | 352b37f5c89144d4ad053413926... |
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| OS-DCF:diskConfig | MANUAL |
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| accessIPv4 | |
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| accessIPv6 | |
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| progress | 0 |
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| OS-EXT-STS:power_state | 0 |
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| OS-EXT-AZ:availability_zone | nova |
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| config_drive | |
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| status | BUILD |
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| updated | 2014-02-02T13:29:54Z |
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| hostId | |
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| OS-EXT-SRV-ATTR:host | None |
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| OS-SRV-USG:terminated_at | None |
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| key_name | None |
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| OS-EXT-SRV-ATTR:hypervisor_hostname | None |
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| name | myInstanceFromVolume |
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| adminPass | TzjqyGsRcJo9 |
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| tenant_id | f7ac731cc11f40efbc03a9f9e1d... |
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| created | 2014-02-02T13:29:53Z |
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| os-extended-volumes:volumes_attached | [{"id": "2fff50ab..."}] |
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| metadata | {} |
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+--------------------------------------+--------------------------------+
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#. List volumes to see the bootable volume and its attached
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``myInstanceFromVolume`` instance.
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.. code-block:: console
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$ openstack volume list
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+---------------------+-----------------+--------+------+---------------------------------+
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| ID | Display Name | Status | Size | Attached to |
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+---------------------+-----------------+--------+------+---------------------------------+
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| c612f739-8592-44c4- | bootable_volume | in-use | 10 | Attached to myInstanceFromVolume|
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| b7d4-0fee2fe1da0c | | | | on /dev/vda |
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+---------------------+-----------------+--------+------+---------------------------------+
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.. _Attach_swap_or_ephemeral_disk_to_an_instance:
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Attach swap or ephemeral disk to an instance
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Use the ``nova boot`` ``--swap`` parameter to attach a swap disk on boot
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or the ``nova boot`` ``--ephemeral`` parameter to attach an ephemeral
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disk on boot. When you terminate the instance, both disks are deleted.
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Boot an instance with a 512 MB swap disk and 2 GB ephemeral disk.
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.. code-block:: console
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$ nova boot --flavor FLAVOR --image IMAGE_ID --swap 512 \
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--ephemeral size=2 NAME
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.. note::
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The flavor defines the maximum swap and ephemeral disk size. You
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cannot exceed these maximum values.
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