<li>
<code>ovn-nbd</code>(8) connects to the OVN Northbound Database above it
- and the OVN Database below it. It translates the logical network
- configuration in terms of conventional network concepts, taken from the
- OVN Northbound Database, into logical datapath flows in the OVN Database
- below it.
+ and the OVN Southbound Database below it. It translates the
+ logical network configuration in terms of conventional network
+ concepts, taken from the OVN Northbound Database, into logical
+ datapath flows in the OVN Southbound Database below it.
</li>
<li>
<p>
- The <dfn>OVN Database</dfn> is the center of the system. Its clients
- are <code>ovn-nbd</code>(8) above it and <code>ovn-controller</code>(8)
- on every transport node below it.
+ The <dfn>OVN Southbound Database</dfn> is the center of the system.
+ Its clients are <code>ovn-nbd</code>(8) above it and
+ <code>ovn-controller</code>(8) on every transport node below it.
</p>
<p>
- The OVN Database contains three kinds of data: <dfn>Physical
+ The OVN Southbound Database contains three kinds of data: <dfn>Physical
Network</dfn> (PN) tables that specify how to reach hypervisor and
other nodes, <dfn>Logical Network</dfn> (LN) tables that describe the
logical network in terms of ``logical datapath flows,'' and
</p>
<p>
- OVN Database performance must scale with the number of transport nodes.
- This will likely require some work on <code>ovsdb-server</code>(1) as
- we encounter bottlenecks. Clustering for availability may be needed.
+ OVN Southbound Database performance must scale with the number of
+ transport nodes. This will likely require some work on
+ <code>ovsdb-server</code>(1) as we encounter bottlenecks.
+ Clustering for availability may be needed.
</p>
</li>
</ul>
<ul>
<li>
<code>ovn-controller</code>(8) is OVN's agent on each hypervisor and
- software gateway. Northbound, it connects to the OVN Database to learn
- about OVN configuration and status and to populate the PN table and the
- <code>Chassis</code> column in <code>Bindings</code> table with the
- hypervisor's status. Southbound, it connects to
- <code>ovs-vswitchd</code>(8) as an OpenFlow controller, for control over
- network traffic, and to the local <code>ovsdb-server</code>(1) to allow
- it to monitor and control Open vSwitch configuration.
+ software gateway. Northbound, it connects to the OVN Southbound
+ Database to learn about OVN configuration and status and to
+ populate the PN table and the <code>Chassis</code> column in
+ <code>Bindings</code> table with the hypervisor's status.
+ Southbound, it connects to <code>ovs-vswitchd</code>(8) as an
+ OpenFlow controller, for control over network traffic, and to the
+ local <code>ovsdb-server</code>(1) to allow it to monitor and
+ control Open vSwitch configuration.
</li>
<li>
+-----------|-----------+
|
|
- +------+
- |OVN DB|
- +------+
+ +-------------------+
+ | OVN Southbound DB |
+ +-------------------+
|
|
+------------------+------------------+
| | |
- HV 1 | | HV n |
+ HV 1 | | HV n |
+---------------|---------------+ . +---------------|---------------+
| | | . | | |
| ovn-controller | . | ovn-controller |
<p>
The steps in this example refer often to details of the OVN and OVN
- Northbound database schemas. Please see <code>ovn</code>(5) and
+ Northbound database schemas. Please see <code>ovn-sb</code>(5) and
<code>ovn-nb</code>(5), respectively, for the full story on these
databases.
</p>
</li>
<li>
- <code>ovn-nbd</code> receives the OVN Northbound database update. In
- turn, it makes the corresponding updates to the OVN database, by adding
- rows to the OVN database <code>Pipeline</code> table to reflect the new
- port, e.g. add a flow to recognize that packets destined to the new
- port's MAC address should be delivered to it, and update the flow that
- delivers broadcast and multicast packets to include the new port. It
- also creates a record in the <code>Bindings</code> table and populates
- all its columns except the column that identifies the
+ <code>ovn-nbd</code> receives the OVN Northbound database update.
+ In turn, it makes the corresponding updates to the OVN Southbound
+ database, by adding rows to the OVN Southbound database
+ <code>Pipeline</code> table to reflect the new port, e.g. add a
+ flow to recognize that packets destined to the new port's MAC
+ address should be delivered to it, and update the flow that
+ delivers broadcast and multicast packets to include the new port.
+ It also creates a record in the <code>Bindings</code> table and
+ populates all its columns except the column that identifies the
<code>chassis</code>.
</li>
<li>
<code>ovn-nbd</code> receives the OVN Northbound update and in turn
- updates the OVN database accordingly, by removing or updating the
- rows from the OVN database <code>Pipeline</code> table and
- <code>Bindings</code> table that were related to the now-destroyed VIF.
+ updates the OVN Southbound database accordingly, by removing or
+ updating the rows from the OVN Southbound database
+ <code>Pipeline</code> table and <code>Bindings</code> table that
+ were related to the now-destroyed VIF.
</li>
<li>
<li>
<code>ovn-nbd</code> receives the OVN Northbound database update. In
- turn, it makes the corresponding updates to the OVN database, by adding
- rows to the OVN database's <code>Pipeline</code> table to reflect the new
- port and also by creating a new row in the <code>Bindings</code> table
- and populating all its columns except the column that identifies the
+ turn, it makes the corresponding updates to the OVN Southbound
+ database, by adding rows to the OVN Southbound database's
+ <code>Pipeline</code> table to reflect the new port and also by
+ creating a new row in the <code>Bindings</code> table and
+ populating all its columns except the column that identifies the
<code>chassis</code>.
</li>
<li>
<code>ovn-nbd</code> receives the OVN Northbound update and in turn
- updates the OVN database accordingly, by removing or updating the
- rows from the OVN database <code>Pipeline</code> table that were related
- to the now-destroyed CIF. It also deletes the row in the
- <code>Bindings</code> table for that CIF.
+ updates the OVN Southbound database accordingly, by removing or
+ updating the rows from the OVN Southbound database
+ <code>Pipeline</code> table that were related to the now-destroyed
+ CIF. It also deletes the row in the <code>Bindings</code> table
+ for that CIF.
</li>
<li>
projects / cascardo / ovs.git / blobdiff