Merge "VMware: Added doc for VMware VMDK cinder driver"
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@ -270,9 +270,10 @@ is_public=true --property vmware_adaptertype="ide" \
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<section xml:id="VMWare_volumes">
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<title>Volumes with VMware vSphere</title>
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<para>The VMware driver has limited support for attaching Volumes from the OpenStack Block
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Storage service, supporting attachments only if the volume driver type is 'iscsi'. There is no
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support for volumes based on vCenter Datastores in this release.</para>
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<para>The VMware driver supports attaching volumes from the OpenStack Block
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Storage service. 'iscsi' volume driver provides limited support and can be
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used only for attachments. VMware VMDK driver of OpenStack Block Storage
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can be used for managing volumes based out of vSphere datastores.</para>
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</section>
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<section xml:id="VMWare_config">
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<title>Configuration Reference</title>
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@ -0,0 +1,284 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<section xml:id="vmware-vmdk-driver"
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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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<title>VMware VMDK driver</title>
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<para>VMware VMDK driver enables management of cinder volume on VMware
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vCenter Server or ESX managed datastore. Cinder volume is backed by VMDK
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files on the datastore.</para>
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<simplesect>
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<title>Configuration</title>
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<para>Two cinder drivers for VMware vCenter server and ESX are
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provided. Appropriate driver must be configured when using VMware
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server. For attach/detach operation to an instance, the driver works as
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expected only with the VMware driver for nova and it does not work
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with other nova drivers. Both nova and cinder drivers must be
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configured to the same server. The following table captures the
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configuration mapping:</para>
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<table rules="all">
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<caption>
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Cinder-Nova configuration mapping with VMware server
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</caption>
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<thead>
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<tr>
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<td>VMware server</td>
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<td>Nova driver</td>
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<td>Cinder driver</td>
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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>vCenter server</td>
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<td>vmwareapi.VMwareVCDriver</td>
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<td>
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cinder.volume.drivers.vmware.vmdk.VMwareVcVmdkDriver
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</td>
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</tr>
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<tr>
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<td>ESX/ESXi server</td>
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<td>vmwareapi.VMwareESXDriver</td>
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<td>
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cinder.volume.drivers.vmware.vmdk.VMwareEsxVmdkDriver
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</td>
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</tr>
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</tbody>
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</table>
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<para>The following are mandatory properties to be specified in the
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configuration file:</para>
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<table rules="all">
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<caption>
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Mandatory properties
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</caption>
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<thead>
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<tr>
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<td>Name</td>
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<td>Description</td>
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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>vmware_host_ip</td>
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<td>
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IP address for connecting to VMware ESX/VC server
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</td>
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</tr>
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<tr>
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<td>vmware_host_username</td>
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<td>
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Username for authenticating with VMware ESX/VC server
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</td>
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</tr>
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<tr>
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<td>vmware_host_password</td>
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<td>
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Password for authenticating with VMware ESX/VC server
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</td>
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</tr>
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</tbody>
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</table>
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<para>The following are optional properties to be specified in the
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configuration file:</para>
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<table rules="all">
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<caption>
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Optional properties
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</caption>
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<thead>
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<tr>
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<td>Name</td>
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<td>Default value</td>
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<td>Description</td>
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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>vmware_wsdl_location</td>
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<td>None</td>
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<td>Optional VIM service WSDL Location e.g
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http://server/vimService.wsdl. Optional over-ride to
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default location for bug work-arounds.
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</td>
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</tr>
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<tr>
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<td>vmware_api_retry_count</td>
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<td>10</td>
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<td>Number of times VMware ESX/VC server API must be
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retried upon connection related issues
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</td>
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</tr>
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<tr>
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<td>vmware_task_poll_interval</td>
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<td>5</td>
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<td>The interval used for polling remote tasks invoked on
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VMware ESX/VC server
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</td>
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</tr>
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<tr>
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<td>vmware_volume_folder</td>
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<td>cinder-volumes</td>
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<td>Name for the folder in the VC datacenter that will
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contain cinder volumes
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</td>
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</tr>
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<tr>
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<td>vmware_image_transfer_timeout_secs</td>
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<td>7200</td>
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<td>Timeout in seconds for VMDK volume transfer between
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Cinder and Glance
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</td>
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</tr>
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<tr>
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<td>vmware_max_objects_retrieval</td>
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<td>100</td>
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<td>Max number of objects to be retrieved per batch. Query
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results will be obtained in batches from the server and not
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in one shot. Server may still limit the count to something
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less than the configured value.
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</td>
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</tr>
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</tbody>
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</table>
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</simplesect>
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<simplesect>
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<title>VMDK disk type</title>
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<para>VMwareVcVmdkDriver and VMwareEsxVmdkDriver support creating
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VMDK disk file of types: <literal>thin</literal>,
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<literal>thick</literal> and <literal>eagerZeroedThick</literal>.
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VMDK disk file type can be specified via volume type extra specs. By
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using any volume type with appropriate extra spec for volume creation,
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the driver creates one of the above VMDK disk file type. The following
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captures extra spec entry to VMDK disk file type mapping:</para>
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<table rules="all">
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<caption>Extra spec entry to VMDK disk file type mapping</caption>
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<thead>
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<tr>
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<td>Disk file type</td>
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<td>Extra spec key</td>
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<td>Extra spec value</td>
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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>thin</td>
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<td>vmware:vmdk_type</td>
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<td>thin</td>
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</tr>
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<tr>
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<td>thick</td>
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<td>vmware:vmdk_type</td>
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<td>thick</td>
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</tr>
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<tr>
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<td>eagerZeroedThick</td>
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<td>vmware:vmdk_type</td>
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<td>eagerZeroedThick</td>
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</tr>
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</tbody>
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</table>
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<para>When no volume type is used or if none of the above extra spec
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entry is found in the volume type, then the default disk file type
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used is <literal>thin</literal>.</para>
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<para>Example: creation of thick VMDK volume</para>
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<screen>
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<prompt>$</prompt> <userinput>cinder type-create thick_volume</userinput>
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<prompt>$</prompt> <userinput>cinder type-key thick_volume set vmware:vmdk_type=thick</userinput>
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<prompt>$</prompt> <userinput>cinder create --volume-type thick_volume --display-name volume1 1</userinput>
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</screen>
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</simplesect>
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<simplesect>
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<title>Clone type</title>
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<para>VMwareVcVmdkDriver supports clone types: <literal>full</literal>
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and <literal>linked/fast</literal> while creating volume from another
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source volume or from a snapshot point. Clone type can be specified via
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volume type extra specs. By using volume type with appropriate extra
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spec for creating volume from another source volume or from a snapshot
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point, the driver creates a <literal>full</literal> clone or a
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<literal>linked</literal> clone. The following captures extra spec
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entry to clone type mapping:</para>
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<table rules="all">
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<caption>Extra spec entry to clone type mapping</caption>
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<thead>
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<tr>
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<td>Clone type</td>
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<td>Extra spec key</td>
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<td>Extra spec value</td>
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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>full</td>
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<td>vmware:clone_type</td>
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<td>full</td>
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</tr>
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<tr>
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<td>linked/fast</td>
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<td>vmware:clone_type</td>
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<td>linked</td>
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</tr>
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</tbody>
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</table>
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<para>When no volume type is used or if none of the above extra spec
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entry is found in the volume type, then the default clone type is
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<literal>full</literal>.</para>
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<para>Example: linked cloning from another source volume</para>
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<screen>
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<prompt>$</prompt> <userinput>cinder type-create fast_clone</userinput>
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<prompt>$</prompt> <userinput>cinder type-key fast_clone set vmware:clone_type=linked</userinput>
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<prompt>$</prompt> <userinput>cinder create --volume-type fast_clone --source-volid 25743b9d-3605-462b-b9eb-71459fe2bb35 --display-name volume1 1</userinput>
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</screen>
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<para>Note: VMwareEsxVmdkDriver ignores the extra spec entry and always
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creates a <literal>full</literal> clone while creating volume from
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another source volume or from a snapshot point.</para>
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</simplesect>
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<simplesect>
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<title>Supported operations</title>
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<para>The following operations are supported by VMwareVcVmdkDriver and
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VMwareEsxVmdkDriver:</para>
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<itemizedlist>
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<listitem>
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<para>create volume</para>
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</listitem>
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<listitem>
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<para>create volume from another source volume: Supported only
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if source volume is not attached to an instance.</para>
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</listitem>
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<listitem>
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<para>create volume from snapshot</para>
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</listitem>
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<listitem>
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<para>create volume from glance image</para>
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</listitem>
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<listitem>
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<para>attach volume: When a volume is attached to an instance,
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a reconfigure operation is performed on the instance to add the
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volume's VMDK to it. The user must manually rescan and mount
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the device from within the guest operating system.</para>
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</listitem>
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<listitem>
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<para>detach volume</para>
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</listitem>
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<listitem>
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<para>create snapshot: Allowed only if volume is not attached
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to an instance.</para>
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</listitem>
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<listitem>
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<para>delete snapshot: Allowed only if volume is not attached
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to an instance.</para>
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</listitem>
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<listitem>
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<para>upload as image to glance: Allowed only if volume is not
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attached to an instance.</para>
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</listitem>
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</itemizedlist>
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</simplesect>
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<simplesect>
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<title>Datastore selection</title>
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<para>The driver chooses datastore that can accommodate for the volume
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space and has highest <literal>freespace/totalspace</literal> metric
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value.</para>
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<para>When the volume is being attached to an instance, the driver
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tries to place the volume under instance's ESX host on a datastore
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selected based on the above strategy.</para>
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</simplesect>
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</section>
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@ -28,6 +28,7 @@ iscsi_helper=tgtadm</programlisting>
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<xi:include href="drivers/nexenta-volume-driver.xml"/>
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<xi:include href="drivers/nfs-volume-driver.xml"/>
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<xi:include href="drivers/solidfire-volume-driver.xml"/>
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<xi:include href="drivers/vmware-vmdk-driver.xml"/>
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<xi:include href="drivers/windows-volume-driver.xml"/>
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<xi:include href="drivers/xenapi-nfs.xml"/>
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<xi:include href="drivers/xen-sm-driver.xml"/>
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