From f0131e14b8550d5d3637b29f0151ad280c77cb63 Mon Sep 17 00:00:00 2001
From: Rafael Folco <rfolco@br.ibm.com>
Date: Wed, 23 Sep 2015 12:55:02 -0500
Subject: [PATCH] Nano and Micro flavors should run really small cirros only

Guests with large memory requirements can use default flavors, so
removing the special flavor for ppc64 since new qemu requires more
memory - http://wiki.qemu.org/ChangeLog/2.4 - PowerPC.
Users should set DEFAULT_INSTANCE_TYPE to one of the default
flavors available in local.conf, as m1.tiny.

DocImpact

Change-Id: I0fd275dc7342cc2daa83e9a2bd79d30e7defa3e4
---
 doc/source/configuration.rst | 22 ++++++++++++++++++++++
 lib/tempest                  | 13 ++-----------
 2 files changed, 24 insertions(+), 11 deletions(-)

diff --git a/doc/source/configuration.rst b/doc/source/configuration.rst
index e8de7c4f70..8f311e037b 100644
--- a/doc/source/configuration.rst
+++ b/doc/source/configuration.rst
@@ -402,6 +402,28 @@ these default images; in that case, you will want to populate
         IMAGE_URLS="http://foo.bar.com/image.qcow,"
         IMAGE_URLS+="http://foo.bar.com/image2.qcow"
 
+
+Instance Type
+-------------
+
+``DEFAULT_INSTANCE_TYPE`` can be used to configure the default instance
+type. When this parameter is not specified, Devstack creates additional
+micro & nano flavors for really small instances to run Tempest tests.
+
+For guests with larger memory requirements, ``DEFAULT_INSTANCE_TYPE``
+should be specified in the configuration file so Tempest selects the
+default flavors instead.
+
+KVM on Power with QEMU 2.4 requires 512 MB to load the firmware -
+`QEMU 2.4 - PowerPC <http://wiki.qemu.org/ChangeLog/2.4>`__ so users
+running instances on ppc64/ppc64le can choose one of the default
+created flavors as follows:
+
+    ::
+
+        DEFAULT_INSTANCE_TYPE=m1.tiny
+
+
 IP Version
 ----------
 
diff --git a/lib/tempest b/lib/tempest
index f4d0a6dab0..6eeab4e231 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -205,21 +205,12 @@ function configure_tempest {
         if  [[ -z "$DEFAULT_INSTANCE_TYPE" ]]; then
             available_flavors=$(nova flavor-list)
             if [[ ! ( $available_flavors =~ 'm1.nano' ) ]]; then
-                if is_arch "ppc64"; then
-                    # Qemu needs at least 128MB of memory to boot on ppc64
-                    nova flavor-create m1.nano 42 128 0 1
-                else
-                    nova flavor-create m1.nano 42 64 0 1
-                fi
+                nova flavor-create m1.nano 42 64 0 1
             fi
             flavor_ref=42
             boto_instance_type=m1.nano
             if [[ ! ( $available_flavors =~ 'm1.micro' ) ]]; then
-                if is_arch "ppc64"; then
-                    nova flavor-create m1.micro 84 256 0 1
-                else
-                    nova flavor-create m1.micro 84 128 0 1
-                fi
+                nova flavor-create m1.micro 84 128 0 1
             fi
             flavor_ref_alt=84
         else