141 lines
10 KiB
XML
141 lines
10 KiB
XML
<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="nova-boot">
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<title>Booting an Image</title>
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<para>After you've configured the Compute service, you
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can now launch an instance. An instance is a virtual machine provisioned by
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OpenStack on one of the Compute servers. Use the procedure below to launch a
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low-resource instance using an image you've already downloaded.</para>
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<note>
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<para>This procedure assumes you have:
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<itemizedlist>
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<listitem><para>Appropriate environment
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variables set to specify your credentials (see
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<xref linkend="keystone-verify"/>
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</para></listitem>
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<listitem><para>Downloaded an image (see <xref linkend="glance-verify"/>).
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</para></listitem>
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<listitem><para>Configured networking (see <xref linkend="nova-network"/>).
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</para></listitem>
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</itemizedlist>
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</para>
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</note>
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<procedure>
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<title>Launch a Compute instance</title>
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<step><para>Generate a keypair consisting of a private key and a public key to be able to launch instances
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on OpenStack. These keys are injected into the instances to make
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password-less SSH access to the instance. This depends on the way the
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necessary tools are bundled into the images. For more details, see
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"Manage instances" in the
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<link xlink:href="http://docs.openstack.org/user-guide-admin/content/cli_manage_images.html">Administration User Guide</link>.</para>
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<screen><prompt>$</prompt> <userinput>ssh-keygen</userinput>
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<prompt>$</prompt> <userinput>cd .ssh</userinput>
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<prompt>$</prompt> <userinput>nova keypair-add --pub_key id_rsa.pub mykey</userinput></screen>
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<para>You have just created a new keypair called mykey. The private key id_rsa is
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saved locally in ~/.ssh which can be used to connect to an instance
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launched using mykey as the keypair. You can view available keypairs
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using the <command>nova keypair-list</command> command.</para>
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<screen><prompt>$</prompt> <userinput>nova keypair-list</userinput>
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<computeroutput>+-------+-------------------------------------------------+
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| Name | Fingerprint |
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+-------+-------------------------------------------------+
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| mykey | b0:18:32:fa:4e:d4:3c:1b:c4:6c:dd:cb:53:29:13:82 |
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| mykey2 | b0:18:32:fa:4e:d4:3c:1b:c4:6c:dd:cb:53:29:13:82 |
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+-------+-------------------------------------------------+</computeroutput></screen>
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</step>
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<step><para>To launch an instance using OpenStack, you must specify the ID for the flavor you want to use
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for the instance. A flavor is a resource allocation profile. For
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example, it specifies how many virtual CPUs and how much RAM your
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instance will get. To see a list of the available profiles, run the
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<command>nova flavor-list</command> command.</para>
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<screen><prompt>$</prompt> <userinput>nova flavor-list</userinput>
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<computeroutput>+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
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| ID | Name | Memory_MB | Disk | Ephemeral | Swap | VCPUs | RXTX_Factor | Is_Public |
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+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+
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| 1 | m1.tiny | 512 | 1 | 0 | | 1 | 1.0 | True |
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| 2 | m1.small | 2048 | 20 | 0 | | 1 | 1.0 | True |
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| 3 | m1.medium | 4096 | 40 | 0 | | 2 | 1.0 | True |
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| 4 | m1.large | 8192 | 80 | 0 | | 4 | 1.0 | True |
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| 5 | m1.xlarge | 16384 | 160 | 0 | | 8 | 1.0 | True |
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+----+-----------+-----------+------+-----------+------+-------+-------------+-----------+</computeroutput></screen>
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</step>
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<step>
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<para>Get the ID of the image you would like to use for the instance using the
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<command>nova image-list</command> command.</para>
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<screen><prompt>$</prompt> nova image-list
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<computeroutput>+--------------------------------------+--------------+--------+--------+
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| ID | Name | Status | Server |
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+--------------------------------------+--------------+--------+--------+
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| 9e5c2bee-0373-414c-b4af-b91b0246ad3b | CirrOS 0.3.1 | ACTIVE | |
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+--------------------------------------+--------------+--------+--------+</computeroutput></screen>
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</step>
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<step><para>Create the instance using the <command>nova boot</command>.
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<screen><prompt>$</prompt> <userinput>nova boot --flavor <replaceable>flavorType</replaceable> --key_name <replaceable>keypairName</replaceable> --image <replaceable>ID</replaceable> <replaceable>newInstanceName</replaceable></userinput> </screen>Create
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an instance using flavor 1 or 2, for example:</para>
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<screen><prompt>$</prompt> <userinput>nova boot --flavor 1 --key_name mykey --image 9e5c2bee-0373-414c-b4af-b91b0246ad3b cirrOS</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 | CirrOS 0.3.1 |
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| OS-EXT-STS:vm_state | building |
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| OS-EXT-SRV-ATTR:instance_name | instance-00000001 |
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| OS-SRV-USG:launched_at | None |
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| flavor | m1.tiny |
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| id | 3bdf98a0-c767-4247-bf41-2d147e4aa043 |
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| security_groups | [{u'name': u'default'}] |
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| user_id | 530166901fa24d1face95cda82cfae56 |
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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 | 2013-10-10T06:47:26Z |
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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 | mykey |
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| OS-EXT-SRV-ATTR:hypervisor_hostname | None |
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| name | cirrOS |
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| adminPass | DWCdW6FnsKNq |
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| tenant_id | e66d97ac1b704897853412fc8450f7b9 |
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| created | 2013-10-10T06:47:23Z |
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| os-extended-volumes:volumes_attached | [] |
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| metadata | {} |
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+--------------------------------------+--------------------------------------+</computeroutput></screen>
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<note><para>If there is not enough RAM available for the instance, Compute will create the instance, but
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will not start it (status 'Error').</para></note>
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</step>
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<step><para>After the instance has been created, it will show up in the output of <command>nova
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list</command> (as the instance is booted up, the status will change from 'BUILD' to
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'ACTIVE').</para>
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<screen><prompt>$</prompt> <userinput>nova list</userinput>
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<computeroutput>+--------------------------------------+--------+--------+----------------------+
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| ID | Name | Status | Networks |
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+--------------------------------------+--------+--------+----------------------+
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| 3bdf98a0-c767-4247-bf41-2d147e4aa043 | cirrOS | BUILD | demonet=192.168.0.11 |
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+--------------------------------------+--------+--------+----------------------+</computeroutput>
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<prompt>$</prompt> <userinput>nova list</userinput>
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<computeroutput>+--------------------------------------+--------+--------+----------------------+
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| ID | Name | Status | Networks |
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+--------------------------------------+--------+--------+----------------------+
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| 3bdf98a0-c767-4247-bf41-2d147e4aa043 | cirrOS | ACTIVE | demonet=192.168.0.11 |
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+--------------------------------------+--------+--------+----------------------+</computeroutput>
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</screen>
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<note><para>You can also retrieve additional details about the specific instance using the
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<command>nova show</command> command.</para>
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<screen><prompt>$</prompt> <userinput>nova show 3bdf98a0-c767-4247-bf41-2d147e4aa043</userinput></screen></note>
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</step>
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<step><para>Once enough time has passed so that the instance is fully booted and initialized,
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you can <command>ssh</command> into the instance. You can obtain the IP address of the instance from the
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output of <command>nova list</command>.</para>
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<screen><prompt>$</prompt> ssh -i mykey root@192.168.0.11</screen></step>
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</procedure>
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</section>
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