337 lines
21 KiB
XML
337 lines
21 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE section [
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<!ENTITY % openstack SYSTEM "entities/openstack.ent">
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%openstack;
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]>
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<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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version="5.0"
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xml:id="boot_from_volume">
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<title>Launch an instance from a volume</title>
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<para>You can boot instances from a volume instead of an image.</para>
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<para>To complete these tasks, use these parameters on the nova
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<command>boot</command> command:</para>
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<informaltable rules="all">
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<col width="30%"/>
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<col width="30%"/>
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<col width="30%"/>
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<thead>
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<tr>
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<th>Task</th>
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<th>nova boot parameter</th>
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<th>See</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>Boot an instance from an image and attach a non-bootable
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volume.</td>
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<td><parameter>--block-device</parameter></td>
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<td><xref linkend="attach_volume_to_instance"/></td>
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</tr>
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<tr>
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<td>Create a volume from an image and boot an instance from
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that volume.</td>
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<td><parameter>--block-device</parameter></td>
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<td><xref linkend="create_volume_from_image_and_boot"/></td>
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</tr>
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<tr>
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<td>Boot from an existing source image, volume, or
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snapshot.</td>
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<td><parameter>--block-device</parameter></td>
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<td><xref linkend="create_volume_from_image_and_boot"/></td>
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</tr>
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<tr>
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<td>Attach a swap disk to an instance.</td>
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<td>
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<parameter>--swap</parameter></td>
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<td><xref linkend="attach-disk-to-instance"/></td>
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</tr>
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<tr>
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<td>Attach an ephemeral disk to an instance.</td>
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<td><parameter>--ephemeral</parameter></td>
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<td><xref linkend="attach-disk-to-instance"/></td>
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</tr>
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</tbody>
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</informaltable>
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<note>
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<para>To attach a volume to a running instance, see <xref
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linkend="cli_attach_volume"/>.</para>
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</note>
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<section xml:id="attach_volume_to_instance">
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<title>Boot instance from image and attach non-bootable
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volume</title>
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<para>Create a non-bootable volume and attach that volume to an
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instance that you boot from an image.</para>
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<para>To create a non-bootable volume, do not create it from an
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image. The volume must be entirely empty with no partition table
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and no file system.</para>
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<procedure>
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<step>
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<para>Create a non-bootable volume:</para>
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<screen><prompt>$</prompt> <userinput>cinder create --display-name my-volume 8</userinput>
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<computeroutput>+--------------------------------+--------------------------------------+
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| Property | 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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| created_at | 2014-05-09T16:33:11.000000 |
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| description | None |
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| encrypted | False |
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| id | d620d971-b160-4c4e-8652-2513d74e2080 |
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| metadata | {} |
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| name | my-volume |
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| os-vol-host-attr:host | None |
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| os-vol-mig-status-attr:migstat | None |
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| os-vol-mig-status-attr:name_id | None |
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| os-vol-tenant-attr:tenant_id | ccef9e62b1e645df98728fb2b3076f27 |
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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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| user_id | fef060ae7bfd4024b3edb97dff59017a |
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| volume_type | None |
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+--------------------------------+--------------------------------------+</computeroutput></screen>
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</step>
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<step>
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<para>List volumes:</para>
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<screen><prompt>$</prompt> <userinput>cinder list</userinput>
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<computeroutput>+--------------------------------------+-----------+-----------+------+-------------+----------+-------------+
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| ID | Status | Name | Size | Volume Type | Bootable | Attached to |
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+--------------------------------------+-----------+-----------+------+-------------+----------+-------------+
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| d620d971-b160-4c4e-8652-2513d74e2080 | available | my-volume | 8 | None | false | |
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+--------------------------------------+-----------+-----------+------+-------------+----------+-------------+</computeroutput></screen>
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</step>
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<step xml:id="launch_image_with_attached_volume">
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<para>Boot an instance from an image and attach the empty
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volume to the instance:</para>
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<screen><prompt>$</prompt> <userinput>nova boot --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</userinput>
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<computeroutput>+--------------------------------------+----------------------------------------------------------------+
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| Property | 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-0.3.1-x86_64-uec (98901246-af91-43d8-b5e6-a4506aa8f369) |
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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-8652-2513d74e2080"}] |
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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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+--------------------------------------+----------------------------------------------------------------+</computeroutput></screen>
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</step>
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</procedure>
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</section>
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<section xml:id="create_volume_from_image_and_boot">
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<title>Create volume from image and boot instance</title>
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<para>You can create a volume from an existing image, volume, or
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snapshot. This procedure shows you how to create a volume from
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an image, and use the volume to boot an instance.</para>
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<procedure>
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<step>
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<para>List the available images:</para>
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<screen><prompt>$</prompt> <userinput>nova image-list</userinput>
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<computeroutput>+--------------------------------------+---------------------------------+--------+--------+
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| ID | Name | Status | Server |
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+--------------------------------------+---------------------------------+--------+--------+
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| 484e05af-a14d-4567-812b-28122d1c2260 | Fedora-x86_64-20-20131211.1-sda | ACTIVE | |
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| 98901246-af91-43d8-b5e6-a4506aa8f369 | cirros-0.3.1-x86_64-uec | ACTIVE | |
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| b6e95589-7eb2-4171-8bab-d225d9262c73 | cirros-0.3.1-x86_64-uec-kernel | ACTIVE | |
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| c90893ea-e732-40ac-a23d-4e36b2082c35 | cirros-0.3.1-x86_64-uec-ramdisk | ACTIVE | |
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+--------------------------------------+---------------------------------+--------+--------+</computeroutput></screen>
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<para>Note the ID of the image that you want to use to create
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a volume.</para>
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</step>
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<step>
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<para>List the available flavors:</para>
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<screen><prompt>$</prompt> <userinput>nova flavor-list</userinput>
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<computeroutput>+-----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
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| ID | Name | Memory_MB | Disk | Ephemeral | Swap | VCPUs | RXTX_Factor | Is_Public |
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+-----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
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| 1 | m1.tiny | 512 | 1 | 0 | | 1 | 1.0 | True |
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| 2 | m1.small | 2048 | 20 | 0 | | 1 | 1.0 | True |
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| 3 | m1.medium | 4096 | 40 | 0 | | 2 | 1.0 | True |
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| 4 | m1.large | 8192 | 80 | 0 | | 4 | 1.0 | True |
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| 42 | m1.nano | 64 | 0 | 0 | | 1 | 1.0 | True |
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| 451 | m1.heat | 1024 | 0 | 0 | | 2 | 1.0 | True |
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| 5 | m1.xlarge | 16384 | 160 | 0 | | 8 | 1.0 | True |
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| 84 | m1.micro | 128 | 0 | 0 | | 1 | 1.0 | True |
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+-----+-----------+-----------+------+-----------+------+-------+-------------+-----------+</computeroutput></screen>
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<para>Note the ID of the flavor that you want to use to create
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a volume.</para>
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</step>
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<step>
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<para>To create a bootable volume from an image and launch an
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instance from this volume, use the
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<parameter>--block-device</parameter> parameter.</para>
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<para>For example:</para>
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<screen><prompt>$</prompt> <userinput>nova boot --flavor <replaceable>FLAVOR</replaceable> --block-device source=<replaceable>SOURCE</replaceable>,id=<replaceable>ID</replaceable>,dest=<replaceable>DEST</replaceable>,size=<replaceable>SIZE</replaceable>,shutdown=<replaceable>PRESERVE</replaceable>,bootindex=<replaceable>INDEX</replaceable> <replaceable>NAME</replaceable></userinput></screen>
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<para>The parameters are:</para>
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<itemizedlist>
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<listitem>
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<para><parameter>--flavor</parameter>
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<replaceable>FLAVOR</replaceable>. The flavor ID or
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name.</para>
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</listitem>
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<listitem>
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<para><parameter>--block-device</parameter>
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source=<replaceable>SOURCE</replaceable>,id=<replaceable>ID</replaceable>,dest=<replaceable>DEST</replaceable>,size=<replaceable>SIZE</replaceable>,shutdown=<replaceable>PRESERVE</replaceable>,bootindex=<replaceable>INDEX</replaceable></para>
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<variablelist>
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<varlistentry>
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<term><emphasis role="bold"
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>source=<replaceable>SOURCE</replaceable></emphasis></term>
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<listitem>
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<para>The type of object used to create the block
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device. Valid values are
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<literal>volume</literal>,
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<literal>snapshot</literal>,
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<literal>image</literal>, and
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<literal>blank</literal>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold"
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>id=<replaceable>ID</replaceable></emphasis></term>
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<listitem>
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<para>The ID of the source object.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold"
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>dest=<replaceable>DEST</replaceable></emphasis></term>
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<listitem>
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<para>The type of the target virtual device. Valid
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values are <literal>volume</literal> and
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<literal>local</literal>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold"
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>size=<replaceable>SIZE</replaceable></emphasis></term>
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<listitem>
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<para>The size of the volume that is created.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold"
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>shutdown={preserve|remove}</emphasis></term>
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<listitem>
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<para>What to do with the volume when the instance
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is deleted. <literal>preserve</literal> does not
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delete the volume. <literal>remove</literal>
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deletes the volume.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold"
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>bootindex=<replaceable>INDEX</replaceable></emphasis></term>
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<listitem>
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<para>Orders the boot disks. Use
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<literal>0</literal> to boot from this
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volume.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</listitem>
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<listitem>
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<para><replaceable>NAME</replaceable>. The name for the
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server.</para>
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</listitem>
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</itemizedlist>
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</step>
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<step xml:id="launch_image_from_volume">
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<para>Create a bootable volume from an image, before the
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instance boots. The volume is not deleted when the instance
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is terminated:</para>
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<screen><prompt>$</prompt> <userinput>nova boot --flavor 2 \
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--block-device source=image,id=e0b7734d-2331-42a3-b19e-067adc0da17d,dest=volume,size=10,shutdown=preserve,bootindex=0 \
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myInstanceFromVolume</userinput>
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<computeroutput>+--------------------------------------+-------------------------------------------------+
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| Property | 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 - 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-fe332e546ecc |
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| security_groups | [{u'name': u'default'}] |
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| user_id | 352b37f5c89144d4ad0534139266d51f |
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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 | f7ac731cc11f40efbc03a9f9e1d1d21f |
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| created | 2014-02-02T13:29:53Z |
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| os-extended-volumes:volumes_attached | [] |
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| metadata | {} |
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+--------------------------------------+-------------------------------------------------+</computeroutput></screen>
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</step>
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<step>
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<para>List volumes to see the bootable volume and its attached
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<literal>myInstanceFromVolume</literal> instance:</para>
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<screen><prompt>$</prompt> <userinput>cinder list</userinput>
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<computeroutput>+--------------------------------------+--------+--------------+------+-------------+----------+--------------------------------------+
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| ID | Status | Display Name | Size | Volume Type | Bootable | Attached to |
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+--------------------------------------+--------+--------------+------+-------------+----------+--------------------------------------+
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| 2fff50ab-1a9c-4d45-ae60-1d054d6bc868 | in-use | | 10 | None | true | 2e65c854-dba9-4f68-8f08-fe332e546ecc |
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+--------------------------------------+--------+--------------+------+-------------+----------+--------------------------------------+</computeroutput></screen>
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</step>
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</procedure>
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</section>
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<section xml:id="attach-disk-to-instance">
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<title>Attach swap or ephemeral disk to an instance</title>
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<para>Use the nova <command>boot</command>
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<parameter>--swap</parameter> parameter to attach a swap disk on
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boot or the nova <command>boot</command>
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<parameter>--ephemeral</parameter> parameter to attach an
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ephemeral disk on boot. When you terminate the instance, both
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disks are deleted.</para>
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<para>Boot an instance with a 512 MB swap disk and 2 GB
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ephemeral disk:</para>
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<screen><prompt>$</prompt> <userinput>nova boot --flavor <replaceable>FLAVOR</replaceable> --image <replaceable>IMAGE_ID</replaceable> --swap 512 --ephemeral size=2 <replaceable>NAME</replaceable></userinput></screen>
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<note>
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<para>The flavor defines the maximum swap and ephemeral disk
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size. You cannot exceed these maximum values.</para>
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</note>
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</section>
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</section>
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