openstack/devstack
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docs: add "kvm on s390x" specific configuration in local.conf

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The upstream CI runs exclusively on nodes with x86 architectures, but
OpenStack supports even more platforms. One of them is the KVM
on s390x (IBM z systems), which is supported since the *Kilo* release.
This change describes the additional settings in the ``local.conf`` file
to enable Devstack on that platform. This is useful for PoCs.

Change-Id: I943b552ca2e36210ac57f36c16db930eb5e58623
This commit is contained in:
Markus Zoeller 2017-05-29 15:39:21 +02:00
parent 899616290c
commit 14728c7a51
1 changed files with 60 additions and 0 deletions
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60
doc/source/configuration.rst
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@ -195,6 +195,9 @@ will not be set if there is no IPv6 address on the default Ethernet interface.
Setting it here also makes it available for ``openrc`` to set ``OS_AUTH_URL``.
``HOST_IPV6`` is not set by default.
For architecture specific configurations which differ from the x86 default
here, see `arch-configuration`_.
Historical Notes
================
@ -749,3 +752,60 @@ overridden by setting them in the ``localrc`` section.
::
TERMINATE_TIMEOUT=30
.. _arch-configuration:
Architectures
-------------
The upstream CI runs exclusively on nodes with x86 architectures, but
OpenStack supports even more architectures. Some of them need to configure
Devstack in a certain way.
KVM on s390x (IBM z Systems)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
KVM on s390x (IBM z Systems) is supported since the *Kilo* release. For
an all-in-one setup, these minimal settings in the ``local.conf`` file
are needed::
[[local|localrc]]
ADMIN_PASSWORD=secret
DATABASE_PASSWORD=$ADMIN_PASSWORD
RABBIT_PASSWORD=$ADMIN_PASSWORD
SERVICE_PASSWORD=$ADMIN_PASSWORD
DOWNLOAD_DEFAULT_IMAGES=False
IMAGE_URLS="https://cloud-images.ubuntu.com/xenial/current/xenial-server-cloudimg-s390x-disk1.img"
enable_service n-sproxy
disable_service n-novnc
disable_service etcd3 # https://bugs.launchpad.net/devstack/+bug/1693192
[[post-config|$NOVA_CONF]]
[serial_console]
base_url=ws://$HOST_IP:6083/ # optional
Reasoning:
* The default image of Devstack is x86 only, so we deactivate the download
with ``DOWNLOAD_DEFAULT_IMAGES``. The referenced guest image
in the code above (``IMAGE_URLS``) serves as an example. The list of
possible s390x guest images is not limited to that.
* This platform doesn't support a graphical console like VNC or SPICE.
The technical reason is the missing framebuffer on the platform. This
means we rely on the substitute feature *serial console* which needs the
proxy service ``n-sproxy``. We also disable VNC's proxy ``n-novnc`` for
that reason . The configuration in the ``post-config`` section is only
needed if you want to use the *serial console* outside of the all-in-one
setup.
* The service ``etcd3`` needs to be disabled as long as bug report
https://bugs.launchpad.net/devstack/+bug/1693192 is not resolved.
.. note:: To run *Tempest* against this *Devstack* all-in-one, you'll need
to use a guest image which is smaller than 1GB when uncompressed.
The example image from above is bigger than that!