243 lines
13 KiB
XML
243 lines
13 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE section [
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<!-- Some useful entities borrowed from HTML -->
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<!ENTITY ndash "–">
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<!ENTITY mdash "—">
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<!ENTITY hellip "…">
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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" version="5.0"
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xml:id="dashboard_launch_instances_from_image">
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<title>Launch an instance</title>
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<?dbhtml stop-chunking?>
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<para>When you launch an instance from an image, OpenStack creates a local
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copy of the image on the compute node where the instance starts.</para>
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<para>When you launch an instance from a volume, note the following
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steps:</para>
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<itemizedlist>
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<listitem>
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<para>To select the volume to from which to launch, launch an
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instance from an arbitrary image on the volume. The image that
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you select does not boot. Instead, it is replaced by the image
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on the volume that you choose in the next steps.</para>
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<para>To boot a Xen image from a volume, the image you launch in
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must be the same type, fully virtualized or paravirtualized, as
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the one on the volume.</para>
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</listitem>
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<listitem>
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<para>Select the volume or volume snapshot from which to boot. Enter
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a device name. Enter <literal>vda</literal> for KVM images or
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<literal>xvda</literal> for Xen images.</para>
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</listitem>
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</itemizedlist>
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<procedure>
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<step>
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<para>Log in to the dashboard, choose a project, and click
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<guilabel>Images & Snapshot</guilabel>.</para>
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<para>The dashboard shows the images that have been uploaded to
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OpenStack Image Service and are available for this
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project.</para>
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<para>For details on creating images, see <link
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xlink:href="http://docs.openstack.org/image-guide/content/ch_creating_images_manually.html"
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>Creating images manually</link> in the <citetitle>OpenStack
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Virtual Machine Image Guide</citetitle>.</para>
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</step>
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<step>
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<para>Select an image and click
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<guibutton>Launch</guibutton>.</para>
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</step>
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<step>
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<para>In the Launch Instance dialog box, specify the following
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values:</para>
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<informaltable rules="all" width="75%">
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<col width="30%"/>
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<col width="70%"/>
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<thead>
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<tr>
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<th colspan="2" align="center"
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><guilabel>Details</guilabel> tab</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><para><guilabel>Availability
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Zone</guilabel></para></td>
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<td>
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<para>By default, this value is set to the
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availability zone given by the cloud provider
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(for example, <literal>us-west</literal> or
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<literal>apac-south</literal>). For most
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cases, it could be
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<literal>nova</literal>.</para>
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</td>
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</tr>
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<tr>
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<td><para><guilabel>Instance Name</guilabel></para></td>
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<td><para>Assign a name to the virtual machine.</para>
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<note>
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<para>The name you assign here becomes the
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initial host name of the server. After the
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server is built, if you change the server
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name in the API or change the host name
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directly, the names are not updated in the
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dashboard.</para>
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<para>Server names are not guaranteed to be
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unique when created so you could have two
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instances with the same host name.</para>
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</note>
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</td>
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</tr>
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<tr>
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<td>
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<para><guilabel>Flavor</guilabel></para></td>
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<td><para>Specify the size of the instance to
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launch.</para></td>
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</tr>
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<tr>
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<td><para><guilabel>Instance
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Count</guilabel></para></td>
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<td><para>To launch multiple instances, enter a value
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greater than 1. The default is 1.</para></td>
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</tr>
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<tr>
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<td>
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<para>
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<guilabel>Instance Boot Source</guilabel>
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</para>
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</td>
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<td><para>Your options are:</para>
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<itemizedlist>
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<listitem>
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<para>
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<guilabel>Boot from
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image</guilabel>—If you choose
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this option, a new field for
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<guilabel>Image Name</guilabel>
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displays. You can select the image from
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the list.</para>
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</listitem>
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<listitem>
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<para>
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<guilabel>Boot from
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snapshot</guilabel>—If you choose
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this option, a new field for
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<guilabel>Instance Snapshot</guilabel>
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displays. You can select the snapshot
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from the list.</para>
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</listitem>
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<listitem>
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<para>
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<guilabel>Boot from
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volume</guilabel>—If you choose
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this option, a new field for
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<guilabel>Volume</guilabel> displays.
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You can select the volume from the
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list.</para>
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</listitem>
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<listitem>
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<para>
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<guilabel>Boot from image (creates a new
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volume) </guilabel>—With this
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option, you can boot from an image and
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create a volume by entering the
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<guilabel>Device Size</guilabel> and
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<guilabel>Device Name</guilabel> for
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your volume.</para>
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</listitem>
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<listitem>
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<para>
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<guilabel>Boot from volume snapshot
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(creates a new volume)</guilabel>—
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Using this option, you can boot from a
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volume snapshot and create a new volume
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by choosing <guilabel>Volume
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Snapshot</guilabel> from a list and
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adding a <guilabel>Device
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Name</guilabel> for your volume.</para>
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</listitem>
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</itemizedlist>
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<para>Since you are launching an instance from an
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image, <guilabel>Boot from image</guilabel> is
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chosen by default.</para>
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</td>
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</tr>
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<tr>
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<td>
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<para>
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<guilabel>Image Name</guilabel>
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</para>
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</td>
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<td>
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<para>This field changes based on your previous
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selection. Since you have chosen to launch an
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instance using an image, the <guilabel>Image
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Name</guilabel> field displays. Select the
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image name from the dropdown list.</para>
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</td>
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</tr>
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<tr>
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<th colspan="2" align="center"><guilabel>Access &
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Security</guilabel> tab</th>
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</tr>
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<tr>
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<td><para><guilabel>Keypair</guilabel></para></td>
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<td><para>Specify a key pair.</para>
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<para>If the image uses a static root password or a
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static key set (neither is recommended), you do
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not need to provide a key pair to launch the
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instance.</para></td>
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</tr>
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<tr>
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<td><para><guilabel>Security
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Groups</guilabel></para></td>
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<td><para>Activate the security groups that you want to
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assign to the instance.</para>
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<para>Security groups are a kind of cloud firewall
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that define which incoming network traffic is
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forwarded to instances. For details, see <xref
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linkend="security_groups_add_rule"/>.</para>
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<para>If you have not created any security groups,
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you can assign only the default security group
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to the instance.</para></td>
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</tr>
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<tr>
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<th colspan="2" align="center"
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><guilabel>Networking</guilabel> tab</th>
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</tr>
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<tr>
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<td><para><guilabel>Selected
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Networks</guilabel></para></td>
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<td><para>To add a network to the instance, click the
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<guibutton>+</guibutton> in the
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<guilabel>Available Networks</guilabel>
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field.</para></td>
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</tr>
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<tr>
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<th colspan="2" align="center"
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><guilabel>Post-Creation</guilabel> tab</th>
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</tr>
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<tr>
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<td><para><guilabel>Customization
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Script</guilabel></para></td>
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<td><para>Specify a customization script that runs after
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your instance launches.</para></td>
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</tr>
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</tbody>
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</informaltable>
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</step>
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<step>
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<para>Click <guibutton>Launch</guibutton>.</para>
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<para>The instance starts on a compute node in the cloud.</para>
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</step>
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</procedure>
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<para>The <guilabel>Instances</guilabel> tab shows the instance's name, its
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private and public IP addresses, size, status, task, and power
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state.</para>
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<para>If you did not provide a key pair, security groups, or rules, users
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can access the instance only from inside the cloud through VNC. Even
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pinging the instance is not possible without an ICMP rule configured. To
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access the instance through a VNC console, see <xref
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linkend="instance_console"/>.</para>
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</section>
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