openstack/ironic
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Improve doc of Node serial console

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According to the response from the cloud deployment team
at Fujitsu, there is lack of documentation for serial console.
This patch adds below details:

- Points out the Nova doc of serial console, so deployer can
refer to.
- Adds some info of case serial console runs under HA config.

The content is provided by the deployment team.

Change-Id: Ibd8c98024658b13637cf38f699463ed9beb8c88f
This commit is contained in:
Dao Cong Tien 2018-07-25 09:42:11 +07:00
parent fcc2088409
commit b0084cb872
1 changed files with 43 additions and 0 deletions
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doc/source/admin/console.rst
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@ -222,4 +222,47 @@ If ``console_enabled`` is ``false`` or ``console_info`` is ``None`` then
the serial console is disabled. If you want to launch serial console, see the the serial console is disabled. If you want to launch serial console, see the
``Configure node console``. ``Configure node console``.
Node serial console of the Bare Metal service is compatible with the
serial console of the Compute service. Hence, serial consoles to
Bare Metal nodes can be seen and interacted with via the Dashboard service.
In order to achieve that, you need to follow the documentation for
`Serial Console`_ from the Compute service.
Configuring HA
~~~~~~~~~~~~~~
When using Bare Metal serial console under High Availability (HA)
configuration, you may consider some settings below.
* If you use HAProxy, you may need to set the timeout for both client
and server sides with appropriate values. Here is an example of the
configuration for the timeout parameter.
::
frontend nova_serial_console
bind 192.168.20.30:6083
timeout client 10m # This parameter is necessary
use_backend nova_serial_console if <...>
backend nova_serial_console
balance source
timeout server 10m # This parameter is necessary
option tcpka
option tcplog
server controller01 192.168.30.11:6083 check inter 2000 rise 2 fall 5
server controller02 192.168.30.12:6083 check inter 2000 rise 2 fall 5
* The Compute service's caching feature may need to be enabled in order
to make the Bare Metal serial console work under a HA configuration.
Here is an example of caching configuration in ``nova.conf``.
.. code-block:: ini
[cache]
enabled = true
backend = dogpile.cache.memcached
memcache_servers = memcache01:11211,memcache02:11211,memcache03:11211
.. _`socat`: http://www.dest-unreach.org/socat .. _`socat`: http://www.dest-unreach.org/socat
.. _`Serial Console`: https://docs.openstack.org/nova/latest/admin/remote-console-access.html#serial-console