openstack/openstack-manuals
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Merge "[admin-guide-cloud] Convert compute sections to RST"

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@ -90,7 +90,7 @@ endpoint to use to manage volumes, or there may be an extension under
the covers. In either case, you can use the ``nova`` CLI to manage the covers. In either case, you can use the ``nova`` CLI to manage
volumes. volumes.
.. list-table:: nova volume commands .. list-table:: **nova volume commands**
:header-rows: 1 :header-rows: 1
* - Command * - Command
@ -773,9 +773,7 @@ connectivity.
OpenStack Icehouse and earlier supports read-only access using the OpenStack Icehouse and earlier supports read-only access using the
serial console using the ``os-GetSerialOutput`` server action. Most serial console using the ``os-GetSerialOutput`` server action. Most
cloud images enable this feature by default. For more information, see cloud images enable this feature by default. For more information, see
troubleshooting Compute. :ref:`compute-common-errors-and-fixes`.
.. TODO :ref:`section_compute-empty-log-output`_ added here.
OpenStack Juno and later supports read-write access using the serial OpenStack Juno and later supports read-write access using the serial
console using the ``os-GetSerialConsole`` server action. This feature console using the ``os-GetSerialConsole`` server action. This feature
@ -930,7 +928,7 @@ with the ``rootwrap_config=entry`` parameter.
The :file:`rootwrap.conf` file uses an INI file format with these The :file:`rootwrap.conf` file uses an INI file format with these
sections and parameters: sections and parameters:
.. list-table:: rootwrap.conf configuration options .. list-table:: **rootwrap.conf configuration options**
:widths: 64 31 :widths: 64 31
* - Configuration option=Default value * - Configuration option=Default value
@ -968,7 +966,7 @@ Filter definition files use an INI file format with a ``[Filters]``
section and several lines, each with a unique parameter name, which section and several lines, each with a unique parameter name, which
should be different for each filter you define: should be different for each filter you define:
.. list-table:: filters configuration options .. list-table:: **Filters configuration options**
:widths: 72 39 :widths: 72 39
@ -1462,7 +1460,7 @@ Before starting a migration, review the Configure migrations section.
example, we will migrate the instance to ``HostC``, because example, we will migrate the instance to ``HostC``, because
nova-compute is running on it: nova-compute is running on it:
.. list-table:: nova service-list .. list-table:: **nova service-list**
:widths: 20 9 12 11 9 30 24 :widths: 20 9 12 11 9 30 24
:header-rows: 1 :header-rows: 1
@ -1590,6 +1588,344 @@ Before starting a migration, review the Configure migrations section.
check the log files at :file:`src/dest` for nova-compute and nova-scheduler) check the log files at :file:`src/dest` for nova-compute and nova-scheduler)
to determine why. to determine why.
Configure remote console access
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
To provide a remote console or remote desktop access to guest virtual
machines, use VNC or SPICE HTML5 through either the OpenStack dashboard
or the command line. Best practice is to select one or the other to run.
SPICE console
-------------
OpenStack Compute supports VNC consoles to guests. The VNC protocol is
fairly limited, lacking support for multiple monitors, bi-directional
audio, reliable cut-and-paste, video streaming and more. SPICE is a new
protocol that aims to address the limitations in VNC and provide good
remote desktop support.
SPICE support in OpenStack Compute shares a similar architecture to the
VNC implementation. The OpenStack dashboard uses a SPICE-HTML5 widget in
its console tab that communicates to the ``nova-spicehtml5proxy`` service by
using SPICE-over-websockets. The ``nova-spicehtml5proxy`` service
communicates directly with the hypervisor process by using SPICE.
VNC must be explicitly disabled to get access to the SPICE console. Set
the ``vnc_enabled`` option to ``False`` in the ``[DEFAULT]`` section to
disable the VNC console.
Use the following options to configure SPICE as the console for
OpenStack Compute:
.. list-table:: **Description of SPICE configuration options**
:header-rows: 1
:widths: 25 25
* - Spice configuration option = Default value
- Description
* - ``agent_enabled = True``
- (BoolOpt) Enable spice guest agent support
* - ``enabled = False``
- (BoolOpt) Enable spice related features
* - ``html5proxy_base_url = http://127.0.0.1:6082/spice_auto.html``
- (StrOpt) Location of spice HTML5 console proxy, in the form
"http://127.0.0.1:6082/spice_auto.html"
* - ``html5proxy_host = 0.0.0.0``
- (StrOpt) Host on which to listen for incoming requests
* - ``html5proxy_port = 6082``
- (IntOpt) Port on which to listen for incoming requests
* - ``keymap = en-us``
- (StrOpt) Keymap for spice
* - ``server_listen = 127.0.0.1``
- (StrOpt) IP address on which instance spice server should listen
* - ``server_proxyclient_address = 127.0.0.1``
- (StrOpt) The address to which proxy clients (like nova-spicehtml5proxy)
should connect
VNC console proxy
-----------------
The VNC proxy is an OpenStack component that enables compute service
users to access their instances through VNC clients.
.. note::
The web proxy console URLs do not support the websocket protocol
scheme (ws://) on python versions less than 2.7.4.
The VNC console connection works as follows:
#. A user connects to the API and gets an ``access_url`` such as,
``http://ip:port/?token=xyz``.
#. The user pastes the URL in a browser or uses it as a client
parameter.
#. The browser or client connects to the proxy.
#. The proxy talks to ``nova-consoleauth`` to authorize the token for the
user, and maps the token to the *private* host and port of the VNC
server for an instance.
The compute host specifies the address that the proxy should use to
connect through the :file:`nova.conf` file option,
``vncserver_proxyclient_address``. In this way, the VNC proxy works
as a bridge between the public network and private host network.
#. The proxy initiates the connection to VNC server and continues to
proxy until the session ends.
The proxy also tunnels the VNC protocol over WebSockets so that the
``noVNC`` client can talk to VNC servers. In general, the VNC proxy:
- Bridges between the public network where the clients live and the
private network where VNC servers live.
- Mediates token authentication.
- Transparently deals with hypervisor-specific connection details to
provide a uniform client experience.
.. figure:: figures/SCH_5009_V00_NUAC-VNC_OpenStack.png
:alt: noVNC process
:width: 95%
About nova-consoleauth
^^^^^^^^^^^^^^^^^^^^^^
Both client proxies leverage a shared service to manage token
authentication called ``nova-consoleauth``. This service must be running for
either proxy to work. Many proxies of either type can be run against a
single ``nova-consoleauth`` service in a cluster configuration.
Do not confuse the ``nova-consoleauth`` shared service with
``nova-console``, which is a XenAPI-specific service that most recent
VNC proxy architectures do not use.
Typical deployment
^^^^^^^^^^^^^^^^^^
A typical deployment has the following components:
- A ``nova-consoleauth`` process. Typically runs on the controller host.
- One or more ``nova-novncproxy`` services. Supports browser-based noVNC
clients. For simple deployments, this service typically runs on the
same machine as ``nova-api`` because it operates as a proxy between the
public network and the private compute host network.
- One or more ``nova-xvpvncproxy`` services. Supports the special Java
client discussed here. For simple deployments, this service typically
runs on the same machine as ``nova-api`` because it acts as a proxy
between the public network and the private compute host network.
- One or more compute hosts. These compute hosts must have correctly
configured options, as follows.
VNC configuration options
^^^^^^^^^^^^^^^^^^^^^^^^^
To customize the VNC console, use the following configuration options in
your :file:`nova.conf`:
.. note::
To support :ref:`live migration <section_configuring-compute-migrations>`,
you cannot specify a specific IP address for ``vncserver_listen``,
because that IP address does not exist on the destination host.
.. list-table:: **Description of VNC configuration options**
:header-rows: 1
:widths: 25 25
* - Configuration option = Default value
- Description
* - **[DEFAULT]**
-
* - ``daemon = False``
- (BoolOpt) Become a daemon (background process)
* - ``key = None``
- (StrOpt) SSL key file (if separate from cert)
* - ``novncproxy_host = 0.0.0.0``
- (StrOpt) Host on which to listen for incoming requests
* - ``novncproxy_port = 6080``
- (IntOpt) Port on which to listen for incoming requests
* - ``record = False``
- (BoolOpt) Record sessions to FILE.[session_number]
* - ``source_is_ipv6 = False``
- (BoolOpt) Source is ipv6
* - ``ssl_only = False``
- (BoolOpt) Disallow non-encrypted connections
* - ``web = /usr/share/spice-html5``
- (StrOpt) Run webserver on same port. Serve files from DIR.
* - **[vmware]**
-
* - ``vnc_port = 5900``
- (IntOpt) VNC starting port
* - ``vnc_port_total = 10000``
- vnc_port_total = 10000
* - **[vnc]**
-
* - enabled = True
- (BoolOpt) Enable VNC related features
* - novncproxy_base_url = http://127.0.0.1:6080/vnc_auto.html
- (StrOpt) Location of VNC console proxy, in the form
"http://127.0.0.1:6080/vnc_auto.html"
* - vncserver_listen = 127.0.0.1
- (StrOpt) IP address on which instance vncservers should listen
* - vncserver_proxyclient_address = 127.0.0.1
- (StrOpt) The address to which proxy clients (like nova-xvpvncproxy)
should connect
* - xvpvncproxy_base_url = http://127.0.0.1:6081/console
- (StrOpt) Location of nova xvp VNC console proxy, in the form
"http://127.0.0.1:6081/console"
.. note::
- The ``vncserver_proxyclient_address`` defaults to ``127.0.0.1``,
which is the address of the compute host that Compute instructs
proxies to use when connecting to instance servers.
- For all-in-one XenServer domU deployments, set this to
``169.254.0.1.``
- For multi-host XenServer domU deployments, set to a ``dom0
management IP`` on the same network as the proxies.
- For multi-host libvirt deployments, set to a host management IP
on the same network as the proxies.
nova-novncproxy (noVNC)
^^^^^^^^^^^^^^^^^^^^^^^
You must install the noVNC package, which contains the ``nova-novncproxy``
service. As root, run the following command:
.. code-block:: console
# apt-get install nova-novncproxy
The service starts automatically on installation.
To restart the service, run:
.. code-block:: console
# service nova-novncproxy restart
The configuration option parameter should point to your :file:`nova.conf`
file, which includes the message queue server address and credentials.
By default, ``nova-novncproxy`` binds on ``0.0.0.0:6080``.
To connect the service to your Compute deployment, add the following
configuration options to your :file:`nova.conf`:
- ``vncserver_listen=0.0.0.0``
Specifies the address on which the VNC service should bind. Make sure
it is assigned one of the compute node interfaces. This address is
the one used by your domain file.
.. code-block:: console
<graphics type="vnc" autoport="yes" keymap="en-us" listen="0.0.0.0"/>
.. note::
To use live migration, use the 0.0.0.0 address.
- ``vncserver_proxyclient_address=127.0.0.1``
The address of the compute host that Compute instructs proxies to use
when connecting to instance ``vncservers``.
Frequently asked questions about VNC access to virtual machines
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- **Q: What is the difference between ``nova-xvpvncproxy`` and
``nova-novncproxy``?**
A: ``nova-xvpvncproxy``, which ships with OpenStack Compute, is a
proxy that supports a simple Java client. nova-novncproxy uses noVNC
to provide VNC support through a web browser.
- **Q: I want VNC support in the OpenStack dashboard. What services do
I need?**
A: You need ``nova-novncproxy``, ``nova-consoleauth``, and correctly
configured compute hosts.
- **Q: When I use ``nova get-vnc-console`` or click on the VNC tab of
the OpenStack dashboard, it hangs. Why?**
A: Make sure you are running ``nova-consoleauth`` (in addition to
``nova-novncproxy``). The proxies rely on ``nova-consoleauth`` to validate
tokens, and waits for a reply from them until a timeout is reached.
- **Q: My VNC proxy worked fine during my all-in-one test, but now it
doesn't work on multi host. Why?**
A: The default options work for an all-in-one install, but changes
must be made on your compute hosts once you start to build a cluster.
As an example, suppose you have two servers:
.. code:: bash
PROXYSERVER (public_ip=172.24.1.1, management_ip=192.168.1.1)
COMPUTESERVER (management_ip=192.168.1.2)
Your :file:`nova-compute` configuration file must set the following values:
.. code-block:: console
# These flags help construct a connection data structure
vncserver_proxyclient_address=192.168.1.2
novncproxy_base_url=http://172.24.1.1:6080/vnc_auto.html
xvpvncproxy_base_url=http://172.24.1.1:6081/console
# This is the address where the underlying vncserver (not the proxy)
# will listen for connections.
vncserver_listen=192.168.1.2
.. note::
``novncproxy_base_url`` and ``xvpvncproxy_base_url`` use a public
IP; this is the URL that is ultimately returned to clients, which
generally do not have access to your private network. Your
PROXYSERVER must be able to reach ``vncserver_proxyclient_address``,
because that is the address over which the VNC connection is proxied.
- **Q: My noVNC does not work with recent versions of web browsers. Why?**
A: Make sure you have installed ``python-numpy``, which is required
to support a newer version of the WebSocket protocol (HyBi-07+).
- **Q: How do I adjust the dimensions of the VNC window image in the
OpenStack dashboard?**
A: These values are hard-coded in a Django HTML template. To alter
them, edit the :file:`_detail_vnc.html` template file. The location of
this file varies based on Linux distribution. On Ubuntu 14.04, the
file is at
``/usr/share/pyshared/horizon/dashboards/nova/instances/templates/instances/_detail_vnc.html``.
Modify the ``width`` and ``height`` options, as follows:
.. code-block:: console
<iframe src="{{ vnc_url }}" width="720" height="430"></iframe>
- **Q: My noVNC connections failed with ValidationError: Origin header
protocol does not match. Why?**
A: Make sure the ``base_url`` match your TLS setting. If you are
using https console connections, make sure that the value of
``novncproxy_base_url`` is set explicitly where the ``nova-novncproxy``
service is running.
.. _configuring-compute-service-groups: .. _configuring-compute-service-groups:
Configure Compute service groups Configure Compute service groups
@ -1807,7 +2143,7 @@ project.
To customize the trusted compute pools, use these configuration option To customize the trusted compute pools, use these configuration option
settings: settings:
.. list-table:: Description of trusted computing configuration options .. list-table:: **Description of trusted computing configuration options**
:header-rows: 2 :header-rows: 2
* - Configuration option = Default value * - Configuration option = Default value
@ -1886,7 +2222,7 @@ If Compute is deployed with a shared file system, and a node fails,
there are several methods to quickly recover from the failure. This there are several methods to quickly recover from the failure. This
section discusses manual recovery. section discusses manual recovery.
.. TODO ../../common/section_cli_nova_evacuate.xml .. TODO include common/cli_nova_evacuate.rst
.. _nova-compute-node-down-manual-recovery: .. _nova-compute-node-down-manual-recovery:
@ -1937,7 +2273,8 @@ all other hypervisors, use this procedure:
.. note:: .. note::
The credentials for your database can be found in :file:`/etc/nova.conf`. The credentials for your database can be found in
:file:`/etc/nova.conf`.
#. Decide which compute host the affected VM should be moved to, and run #. Decide which compute host the affected VM should be moved to, and run
this database command to move the VM to the new host: this database command to move the VM to the new host:

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doc/admin-guide-cloud-rst/source/index.rst
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@ -31,10 +31,6 @@ Contents
common/app_support.rst common/app_support.rst
common/glossary.rst common/glossary.rst
.. TODO (DC)
Add preface.rst
Add chapter files
Search in this guide Search in this guide
~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~

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@ -1,3 +1,5 @@
:orphan:
================== ==================
Evacuate instances Evacuate instances
================== ==================

2
doc/user-guide-admin/source/cli_admin_manage_environment.rst
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@ -8,7 +8,7 @@ This section includes tasks specific to the OpenStack environment.
:maxdepth: 2 :maxdepth: 2
cli_nova_specify_host.rst cli_nova_specify_host.rst
cli_nova_evacuate.rst common/cli_nova_evacuate.rst
cli_nova_migrate.rst cli_nova_migrate.rst
cli_admin_manage_ip_addresses.rst cli_admin_manage_ip_addresses.rst
cli_admin_manage_stacks.rst cli_admin_manage_stacks.rst