Updated/edited Image chapter.
Install: Added short intro. Turned steps into procedures. Fixed the credentials. Added note about using IP address. Commented out redundant config. Verify: Added link to Virtual Machine Image Guide. Turned steps into procedure. Added info about -is-public value. Change-Id: I27b8397957ac352b25e868d821e9c921d6ec80c9
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xmlns:html="http://www.w3.org/1999/xhtml"
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version="5.0">
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<title>Installing the Image Service</title>
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<para>Install the Image Service on the controller node.</para>
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<screen os="ubuntu"><prompt>#</prompt> <userinput>sudo apt-get install glance</userinput></screen>
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<screen os="rhel;centos;fedora"><prompt>#</prompt> <userinput>yum install openstack-glance</userinput></screen>
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<screen os="opensuse"><prompt>#</prompt> <userinput>zypper install openstack-glance</userinput></screen>
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<para>The Image Service stores information about images in a database.
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This guide uses the MySQL database used by other OpenStack services.
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<phrase os="ubuntu">The Ubuntu packages create an sqlite database by
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default. Delete the <filename>glance.sqlite</filename> file created in
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the <filename>/var/lib/glance/</filename> directory.</phrase></para>
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<para>Use the <command>openstack-db</command> command to create the
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database and tables for the Image Service, as well as a database user
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called <literal>glance</literal> to connect to the database. Replace
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<literal><replaceable>GLANCE_DBPASS</replaceable></literal> with a
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password of your choosing.</para>
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<screen><prompt>#</prompt> <userinput>openstack-db --init --service glance --password <replaceable>GLANCE_DBPASS</replaceable></userinput></screen>
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<para>You now have to tell the Image Service to use that database. The Image
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Service provides two OpenStack services: <literal>glance-api</literal> and
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<literal>glance-registry</literal>. They each have separate configuration
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files, so you will have to configure both throughout this section.</para>
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<screen><prompt>#</prompt> <userinput>openstack-config --set /etc/glance/glance-api.conf \
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DEFAULT sql_connection mysql://glance:<replaceable>GLANCE_PASS</replaceable>@controller/glance</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/glance/glance-registry.conf \
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DEFAULT sql_connection mysql://glance:<replaceable>GLANCE_PASS</replaceable>@controller/glance</userinput></screen>
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<para>Create a user called <literal>glance</literal> that the Image
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Service can use to authenticate with the Identity Service. Use the
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<literal>service</literal> tenant and give the user the
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<literal>admin</literal> role.</para>
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<para>The Image service acts as a registry for virtual disk images. Users can add new images
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or take a snapshot (copy) of an existing server for immediate storage. Snapshots can be
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used as back up or as templates for new servers. Registered images can be stored in the
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Object Storage service, as well as in other locations (for example, in simple file
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systems or external web servers).</para>
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<note>
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<para>These examples assume you have the appropriate environment
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variables set to specify your credentials, as described in
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<xref linkend="keystone-verify"/>.</para>
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<para>Steps in this procedure assume you have the appropriate environment
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variables set to specify your credentials, as described in
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<xref linkend="keystone-verify"/>.</para>
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</note>
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<screen><prompt>#</prompt> <userinput>keystone user-create --name=glance --pass=<replaceable>GLANCE_PASS</replaceable> --email=<replaceable>glance@example.com</replaceable></userinput>
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<prompt>#</prompt> <userinput>keystone user-role-add --user=glance --tenant=service --role=admin</userinput></screen>
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<para>For the Image Service to use these credentials, you have to add
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them to the configuration files.</para>
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<screen><prompt>#</prompt> <userinput>openstack-config --set /etc/glance/glance-api.conf keystone_authtoken auth_host controller</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/glance/glance-api.conf keystone_authtoken admin_user keystone</userinput>
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<procedure>
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<title>Install the Image Service</title>
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<step><para>Install the Image Service on the controller node.</para>
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<screen os="ubuntu"><prompt>#</prompt> <userinput>sudo apt-get install glance</userinput></screen>
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<screen os="rhel;centos;fedora"><prompt>#</prompt> <userinput>yum install openstack-glance</userinput></screen>
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<screen os="opensuse"><prompt>#</prompt> <userinput>zypper install openstack-glance</userinput></screen></step>
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<step><para>The Image Service stores information about images in a database.
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This guide uses the MySQL database used by other OpenStack services.
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<phrase os="ubuntu">The Ubuntu packages create an sqlite database by
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default. Delete the <filename>glance.sqlite</filename> file created in
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the <filename>/var/lib/glance/</filename> directory.</phrase></para>
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<para>Use the <command>openstack-db</command> command to create the
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database and tables for the Image Service, as well as a database user
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called <literal>glance</literal> to connect to the database. Replace
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<literal><replaceable>GLANCE_DBPASS</replaceable></literal> with a
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password of your choosing.</para>
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<screen><prompt>#</prompt> <userinput>openstack-db --init --service glance --password <replaceable>GLANCE_DBPASS</replaceable></userinput></screen></step>
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<step><para>Tell the Image Service to use the created database. The Image Service provides two OpenStack
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services: <literal>glance-api</literal> and <literal>glance-registry</literal>. They each
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have separate configuration files, so you must configure both files throughout this
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section.</para>
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<screen><prompt>#</prompt> <userinput>openstack-config --set /etc/glance/glance-api.conf \
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DEFAULT sql_connection mysql://glance:<replaceable>GLANCE_PASS</replaceable>@<replaceable>controller</replaceable>/glance</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/glance/glance-registry.conf \
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DEFAULT sql_connection mysql://glance:<replaceable>GLANCE_PASS</replaceable>@<replaceable>controller</replaceable>/glance</userinput></screen></step>
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<step><para>Create a user called <literal>glance</literal> that the Image
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Service can use to authenticate with the Identity Service. Use the
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<literal>service</literal> tenant and give the user the
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<literal>admin</literal> role.</para>
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<screen><prompt>#</prompt> <userinput>keystone user-create --name=glance --pass=<replaceable>GLANCE_PASS</replaceable> --email=<replaceable>glance@example.com</replaceable></userinput>
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<prompt>#</prompt> <userinput>keystone user-role-add --user=glance --tenant=service --role=admin</userinput></screen></step>
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<step><para>Add the credentials to the Image Service's configuration files.</para>
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<screen><prompt>#</prompt> <userinput>openstack-config --set /etc/glance/glance-api.conf keystone_authtoken auth_host <replaceable>controller</replaceable></userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/glance/glance-api.conf keystone_authtoken admin_user glance</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/glance/glance-api.conf keystone_authtoken admin_tenant_name service</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/glance/glance-api.conf keystone_authtoken admin_password <replaceable>GLANCE_PASS</replaceable></userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken auth_host controller</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken admin_user keystone</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken auth_host <replaceable>controller</replaceable></userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken admin_user glance</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken admin_tenant_name service</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/glance/glance-registry.conf keystone_authtoken admin_password <replaceable>GLANCE_PASS</replaceable></userinput></screen>
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<para>You also have to add the credentials to the files
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<!-- <para>You also have to add the credentials to the files
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<filename>/etc/glance/glance-api-paste.ini</filename> and
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<filename>/etc/glance/glance-registry-paste.ini</filename>. Open each file
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in a text editor and locate the section <literal>[filter:authtoken]</literal>.
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Make sure the following options are set:</para>
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<programlisting language="ini">[filter:authtoken]
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paste.filter_factory=keystoneclient.middleware.auth_token:filter_factory
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auth_host=controller
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admin_user=glance
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admin_tenant_name=service
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admin_password=<replaceable>GLANCE_PASS</replaceable>
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</programlisting>
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<para>You have to register the Image Service with the Identity Service
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so that other OpenStack services can locate it. Register the service and
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specify the endpoint using the <command>keystone</command> command.</para>
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<screen><prompt>#</prompt> <userinput>keystone service-create --name=glance --type=image \
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--description="Glance Image Service"</userinput></screen>
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<para>Note the <literal>id</literal> property returned and use it when
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creating the endpoint.</para>
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<screen><prompt>#</prompt> <userinput>keystone endpoint-create \
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admin_password=<replaceable>GLANCE_PASS</replaceable></programlisting> -->
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<para>
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<note><para>If you have troubles connecting to the database, try using the IP address instead of the
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host name in the credentials.</para></note>
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</para></step>
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<step><para>Register the Image Service with the Identity Service
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so that other OpenStack services can locate it. Register the service and
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specify the endpoint using the <command>keystone</command> command.</para>
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<screen><prompt>#</prompt> <userinput>keystone service-create --name=glance --type=image \
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--description="Glance Image Service"</userinput></screen></step>
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<step><para>Note the service's <literal>id</literal> property returned in the previous step and use it when
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creating the endpoint.</para>
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<screen><prompt>#</prompt> <userinput>keystone endpoint-create \
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--service-id=<replaceable>the_service_id_above</replaceable> \
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--publicurl=http://controller:9292 \
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--internalurl=http://controller:9292 \
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--adminurl=http://controller:9292</userinput></screen>
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<para>Finally, start the <literal>glance-api</literal> and
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<literal>glance-registry</literal> services and configure them to
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start when the system boots.</para>
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<screen os="ubuntu"><prompt>#</prompt> <userinput>service glance-api start</userinput>
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--publicurl=http://<replaceable>controller</replaceable>:9292 \
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--internalurl=http://<replaceable>controller</replaceable>:9292 \
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--adminurl=http://<replaceable>controller</replaceable>:9292</userinput></screen></step>
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<step><para>Start the <literal>glance-api</literal> and
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<literal>glance-registry</literal> services and configure them to
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start when the system boots.</para>
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<screen os="ubuntu"><prompt>#</prompt> <userinput>service glance-api start</userinput>
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<prompt>#</prompt> <userinput>service glance-registry start</userinput>
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<prompt>#</prompt> <userinput>chkconfig glance-api on</userinput>
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<prompt>#</prompt> <userinput>chkconfig glance-registry on</userinput></screen>
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<screen os="rhel;fedora;centos"><prompt>#</prompt> <userinput>service openstack-glance-api start</userinput>
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<screen os="rhel;fedora;centos"><prompt>#</prompt> <userinput>service openstack-glance-api start</userinput>
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<prompt>#</prompt> <userinput>service openstack-glance-registry start</userinput>
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<prompt>#</prompt> <userinput>chkconfig openstack-glance-api on</userinput>
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<prompt>#</prompt> <userinput>chkconfig openstack-glance-registry on</userinput></screen>
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<screen os="opensuse"><prompt>#</prompt> <userinput>systemctl start openstack-glance-api.service</userinput>
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<screen os="opensuse"><prompt>#</prompt> <userinput>systemctl start openstack-glance-api.service</userinput>
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<prompt>#</prompt> <userinput>systemctl start openstack-glance-registry.service</userinput>
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<prompt>#</prompt> <userinput>systemctl enable openstack-glance-api.service</userinput>
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<prompt>#</prompt> <userinput>systemctl enable openstack-glance-registry.service</userinput></screen>
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<prompt>#</prompt> <userinput>systemctl enable openstack-glance-registry.service</userinput></screen></step>
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</procedure>
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</section>
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@ -4,29 +4,96 @@
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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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<title>Verifying the Image Service Installation</title>
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<para>To test the Image Service installation, download some virtual machine
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images that are known to work with OpenStack. CirrOS is a small test image
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that is often used for testing OpenStack deployments. You can find the most
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recent CirrOS image on their <link
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xlink:href="http://download.cirros-cloud.net/">download page</link>. As of
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this writing the most recent image is version 0.3.1. A 64-bit version in
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QCOW2 format (compatible with KVM or QEMU hypervisors) can be downloaded
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from there.</para>
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<para>The 64-bit CirrOS QCOW2 image is the image we'll use for this
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walkthrough. More detailed information about how to obtain and create
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images can be found in the <link
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xlink:href="http://docs.openstack.org">OpenStack Compute Administration
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Guide</link> in the "Image Management" chapter.</para>
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<para>The download is done in a dedicated directory:</para>
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<screen><prompt>$</prompt> <userinput>mkdir images</userinput>
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<para>To test the Image Service installation, download at least one virtual machine image that
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is known to work with OpenStack. For example, CirrOS is a small test image that is often
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used for testing OpenStack deployments (<link xlink:href="http://download.cirros-cloud.net/"
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>CirrOS downloads</link>). The 64-bit CirrOS QCOW2 image is the image we'll use for this
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walkthrough.</para>
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<para>For more information about:</para>
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<para>
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<itemizedlist>
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<listitem>
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<para>Downloading and building images, refer to the <link
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xlink:href="http://docs.openstack.org/image-guide/content/index.html"
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><citetitle>OpenStack Virtual Machine Image Guide</citetitle></link>.
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</para>
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</listitem>
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<listitem>
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<para>How to manage images, refer to the "Image Management" chapter in the <link
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xlink:href="http://docs.openstack.org/user-guide/content/dashboard_manage_images.html"><citetitle>OpenStack User
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Guide</citetitle></link>.</para>
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</listitem>
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</itemizedlist>
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</para>
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<procedure>
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<title>Upload and View an Image in the Image Service</title>
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<step><para>Download the image into a dedicated directory:</para>
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<screen><prompt>$</prompt> <userinput>mkdir images</userinput>
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<prompt>$</prompt> <userinput>cd images/</userinput>
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<prompt>$</prompt> <userinput>curl -O http://cdn.download.cirros-cloud.net/0.3.1/cirros-0.3.1-x86_64-disk.img</userinput></screen>
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<para>You can now use the <command>glance image-create</command> command to
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upload the image to the Image Service, passing the image file through
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standard input:</para>
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<screen><prompt>#</prompt> <userinput>glance image-create --name="CirrOS 0.3.1" --disk-format=qcow2 \
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<prompt>$</prompt> <userinput>curl -O http://cdn.download.cirros-cloud.net/0.3.1/cirros-0.3.1-x86_64-disk.img</userinput></screen></step>
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<step><para>Use the <command>glance image-create</command> command to upload the image to the Image
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Service, as follows:</para>
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<para><screen><prompt>#</prompt> <userinput>glance image-create --name=<replaceable>imageLabel</replaceable> --disk-format=<replaceable>fileFormat</replaceable> \
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--container-format=<replaceable>containerFormat</replaceable> --is-public=<replaceable>accessValue</replaceable> < <replaceable>imageFile</replaceable></userinput></screen></para>
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<para>Where: <variablelist>
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<varlistentry>
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<term><literal><replaceable>imageLabel</replaceable></literal></term>
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<listitem>
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<para>Arbitrary label. This is the name by which users will refer to the image.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><literal><replaceable>fileFormat</replaceable></literal></term>
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<listitem>
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<para>Specifies the format of the image file. Valid formats include
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<literal>qcow2</literal>, <literal>raw</literal>,
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<literal>vhd</literal>, <literal>vmdk</literal>,
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<literal>vdi</literal>, <literal>iso</literal>,
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<literal>aki</literal>, <literal>ari</literal>, and
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<literal>ami</literal>.</para>
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<para>You can verify the format using the <command>file</command>
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command:
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<screen><prompt>$</prompt> <userinput>file cirros-0.3.1-x86_64-disk.img</userinput>
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<computeroutput>cirros-0.3.1-x86_64-disk.img: QEMU QCOW Image (v2), 41126400 bytes</computeroutput></screen></para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><literal><replaceable>containerFormat</replaceable></literal></term>
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<listitem>
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<para>Specifies the container format. Valid formats include:
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<literal>bare</literal>, <literal>ovf</literal>,
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<literal>aki</literal>, <literal>ari</literal> and
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<literal>ami</literal>.</para>
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<para>Specify <literal>bare</literal> to indicate that the image file is
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not in a file format that contains metadata about the virtual
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machine. Although this field is currently required, it is not
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actually used by any of the OpenStack services and has no effect on
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system behavior. Because the value is not used anywhere, it safe to
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always specify <literal>bare</literal> as the container
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format.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><literal><replaceable>accessValue</replaceable></literal></term>
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<listitem>
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<para>Specifies image access:
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<itemizedlist>
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<listitem><para>true - All users will be able to view
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and use the image.</para></listitem>
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<listitem><para>false - Only administrators will be
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able to view and use the image.</para></listitem>
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</itemizedlist></para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><literal><replaceable>imageFile</replaceable></literal></term>
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<listitem>
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<para>Specifies the name of your downloaded image file.</para>
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</listitem>
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</varlistentry>
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</variablelist></para>
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<para>For example:</para>
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<screen><prompt>#</prompt> <userinput>glance image-create --name="CirrOS 0.3.1" --disk-format=qcow2 \
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--container-format=bare --is-public=true < cirros-0.3.1-x86_64-disk.img</userinput>
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<computeroutput>+------------------+--------------------------------------+
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| Property | Value |
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@ -48,62 +115,18 @@
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| status | active |
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| updated_at | 2013-05-08T18:59:18 |
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+------------------+--------------------------------------+</computeroutput></screen>
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<note>
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<para>The returned image ID is generated dynamically, and therefore
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will be different on your deployment than in this example.</para>
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</note>
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||||
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<para>The rationale for the arguments is:
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<variablelist>
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<varlistentry>
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<term><literal>name="CirrOS 0.3.1"</literal></term>
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<listitem>
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<para>The <literal>name</literal> field is an arbitrary label. In this example
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the name encodes the distribution and version:
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||||
<literal>CirrOS 0.3.1</literal>.</para>
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||||
</listitem>
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</varlistentry>
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<varlistentry>
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<term><literal>disk-format=qcow2</literal></term>
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||||
<listitem>
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||||
<para>The <literal>disk-format</literal> field specifies the format of the image
|
||||
file. In this case, the image file format is QCOW2, which can be verified
|
||||
using the <command>file</command> command:
|
||||
<screen><prompt>$</prompt> <userinput>file cirros-0.3.1-x86_64-disk.img</userinput>
|
||||
<computeroutput>cirros-0.3.1-x86_64-disk.img: QEMU QCOW Image (v2), 41126400 bytes</computeroutput></screen>
|
||||
</para>
|
||||
<para>Other valid formats are <literal>raw</literal>, <literal>vhd</literal>,
|
||||
<literal>vmdk</literal>, <literal>vdi</literal>, <literal>iso</literal>,
|
||||
<literal>aki</literal>, <literal>ari</literal> and
|
||||
<literal>ami</literal>.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry>
|
||||
<term><literal>container-format=bare</literal></term>
|
||||
<listitem>
|
||||
<para>The <literal>container-format</literal> field is required by the
|
||||
<command>glance image-create</command> command but isn't actually used by any of
|
||||
the OpenStack services, so the value specified here has no effect on system
|
||||
behavior. We specify <literal>bare</literal> to indicate that the image file
|
||||
is not in a file format that contains metadata about the virtual
|
||||
machine.</para>
|
||||
<para>Because the value is not used anywhere, it safe to always specify
|
||||
<literal>bare</literal> as the container format, although the command
|
||||
will accept other formats: <literal>ovf</literal>, <literal>aki</literal>,
|
||||
<literal>ari</literal> and <literal>ami</literal>.</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</para>
|
||||
|
||||
<para>Now a <userinput>glance image-list</userinput> should show the image attributes:</para>
|
||||
<screen><prompt>#</prompt> <userinput>glance image-list</userinput>
|
||||
<note>
|
||||
<para>The returned image ID is generated dynamically, and therefore
|
||||
will be different on your deployment than in this example.</para>
|
||||
</note>
|
||||
</step>
|
||||
<step><para>Use the <userinput>glance image-list</userinput> command to confirm
|
||||
that the image has been uploaded and to display its attributes:</para>
|
||||
<screen><prompt>#</prompt> <userinput>glance image-list</userinput>
|
||||
<computeroutput>+--------------------------------------+-----------------+-------------+------------------+----------+--------+
|
||||
| ID | Name | Disk Format | Container Format | Size | Status |
|
||||
+--------------------------------------+-----------------+-------------+------------------+----------+--------+
|
||||
| acafc7c0-40aa-4026-9673-b879898e1fc2 | CirrOS 0.3.1 | qcow2 | bare | 13147648 | active |
|
||||
+--------------------------------------+-----------------+-------------+------------------+----------+--------+</computeroutput></screen>
|
||||
|
||||
+--------------------------------------+-----------------+-------------+------------------+----------+--------+</computeroutput></screen></step>
|
||||
</procedure>
|
||||
</section>
|
||||
|
Loading…
Reference in New Issue
Block a user