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storage backend: Add RBD (RADOS Block Device) support

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This patch adds support for a new storage backend with RBD support.

RBD is the RADOS Block Device and is part of the Ceph distributed storage
system.

It comes in two flavours: Qemu-RBD and Kernel RBD, this storage backend only
supports Qemu-RBD, thus limiting the use of this storage driver to Qemu only.

To function this backend relies on librbd and librados being present on the
local system.

The backend also supports Cephx authentication for safe authentication with
the Ceph cluster.

For storing credentials it uses the built-in secret mechanism of libvirt.

Signed-off-by: Wido den Hollander <wido@widodh.nl>
This commit is contained in:
Wido den Hollander
2012-05-14 11:06:42 +02:00
committed by Eric Blake
parent b8e6021e7b
commit 74951eadef
16 changed files with 922 additions and 45 deletions
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78
docs/schemas/storagepool.rng
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@@ -19,6 +19,7 @@
<ref name='pooliscsi'/>
<ref name='poolscsi'/>
<ref name='poolmpath'/>
<ref name='poolrbd'/>
</choice>
</element>
</define>
@@ -105,6 +106,15 @@
<ref name='target'/>
</define>
<define name='poolrbd'>
<attribute name='type'>
<value>rbd</value>
</attribute>
<ref name='commonmetadata'/>
<ref name='sizing'/>
<ref name='sourcerbd'/>
</define>
<define name='sourceinfovendor'>
<optional>
<element name='vendor'>
@@ -184,17 +194,19 @@
</define>
<define name='sourceinfohost'>
<element name='host'>
<attribute name='name'>
<text/>
</attribute>
<optional>
<attribute name='port'>
<ref name="PortNumber"/>
<oneOrMore>
<element name='host'>
<attribute name='name'>
<text/>
</attribute>
</optional>
<empty/>
</element>
<optional>
<attribute name='port'>
<ref name="PortNumber"/>
</attribute>
</optional>
<empty/>
</element>
</oneOrMore>
</define>
<define name='sourceinfodev'>
@@ -265,14 +277,38 @@
<attribute name='type'>
<choice>
<value>chap</value>
<value>ceph</value>
</choice>
</attribute>
<attribute name='login'>
<text/>
</attribute>
<attribute name='passwd'>
<text/>
</attribute>
<choice>
<attribute name='login'>
<text/>
</attribute>
<attribute name='username'>
<text/>
</attribute>
</choice>
<optional>
<attribute name='passwd'>
<text/>
</attribute>
</optional>
<optional>
<ref name='sourceinfoauthsecret'/>
</optional>
</element>
</define>
<define name='sourceinfoauthsecret'>
<element name='secret'>
<choice>
<attribute name='uuid'>
<text/>
</attribute>
<attribute name='usage'>
<text/>
</attribute>
</choice>
</element>
</define>
@@ -450,6 +486,16 @@
</element>
</define>
<define name='sourcerbd'>
<element name='source'>
<ref name='sourceinfoname'/>
<ref name='sourceinfohost'/>
<optional>
<ref name='sourceinfoauth'/>
</optional>
</element>
</define>
<define name='name'>
<data type='string'>
<param name="pattern">[a-zA-Z0-9_\+\-]+</param>