Virtuabox中Centos 7.3安装devstack后记
折腾了几天devstack，终于把这货装上了，期间真是曲折万千哪！
闲话不说，扯正题，说说我在安装devstack过程中遇过的坑吧。
看我的环境：
$ cat /etc/centos-release
CentOS Linux release 7.3.1611 (Core)为了加速安装过程，采用了trystack的git源和镜像源，在此先附上我的local.conf的配置（借鉴了陈沙克日志的分享的github上配置： https://github.com/shake/devstack）：
[[local|localrc]]
DEST=/opt/stack/mitaka
# use TryStack git mirror
GIT_BASE=http://git.trystack.cn
NOVNC_REPO=http://git.trystack.cn/kanaka/noVNC.git
SPICE_REPO=http://git.trystack.cn/git/spice/spice-html5.git
#OFFLINE=True
RECLONE=True
# Define images to be automatically downloaded during the DevStack built process.
DOWNLOAD_DEFAULT_IMAGES=False
IMAGE_URLS=",https://launchpad.net/cirros/trunk/0.3.0/+download/cirros-0.3.0-x86_64-disk.img"
HOST_IP=192.168.56.101
# Credentials
DATABASE_PASSWORD=pass
ADMIN_PASSWORD=pass
SERVICE_PASSWORD=pass
SERVICE_TOKEN=pass
RABBIT_PASSWORD=pass
HORIZON_BRANCH=stable/mitaka
KEYSTONE_BRANCH=stable/mitaka
NOVA_BRANCH=stable/mitaka
NEUTRON_BRANCH=stable/mitaka
GLANCE_BRANCH=stable/mitaka
CINDER_BRANCH=stable/mitaka
#keystone
KEYSTONE_TOKEN_FORMAT=UUID
##Heat
HEAT_BRANCH=stable/mitaka
enable_service h-eng h-api h-api-cfn h-api-cw
## Swift
SWIFT_BRANCH=stable/mitaka
ENABLED_SERVICES+=,s-proxy,s-object,s-container,s-account
SWIFT_REPLICAS=1
SWIFT_HASH=011688b44136573e209e
# Enabling Neutron (network) Service
disable_service n-net
enable_service q-svc
enable_service q-agt
enable_service q-dhcp
enable_service q-l3
enable_service q-meta
enable_service q-metering
enable_service neutron
## Neutron options
Q_USE_SECGROUP=True
FLOATING_RANGE="192.168.56.0/24"
FIXED_RANGE="10.0.0.0/24"
Q_FLOATING_ALLOCATION_POOL=start=192.168.56.55,end=192.168.56.100
PUBLIC_NETWORK_GATEWAY="192.168.56.1"
Q_L3_ENABLED=True
PUBLIC_INTERFACE=eth0
Q_USE_PROVIDERNET_FOR_PUBLIC=True
OVS_PHYSICAL_BRIDGE=br-ex
PUBLIC_BRIDGE=br-ex
OVS_BRIDGE_MAPPINGS=public:br-ex
# #VLAN configuration.
Q_PLUGIN=ml2
ENABLE_TENANT_VLANS=True
# Logging
LOGFILE=/opt/stack/logs/stack.sh.log
VERBOSE=True
LOG_COLOR=True
SCREEN_LOGDIR=/opt/stack/logs执行完了 tools/create-stack-user.sh之后，会创建一个叫stack的用户，家目录是/opt/stack：
[stack@devstack devstack]$ cat /etc/passwd|grep stack
stack:x:1001:1001::/opt/stack:/bin/bash然后将devstack整个拷贝到/opt/stack下，并设置权限：
chown -R stack:stack /opt/stack/devstack
chmod -R 755 /opt下边就是喜闻乐见的安装了：
[stack@devstack devstack]$ ./stack.sh
+ unset GREP_OPTIONS
+ umask 022
+ PATH=/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/opt/stack/.local/bin:/opt/stack/bin:/usr/local/sbin:/usr/sbin:/sbin
...
...再接下来，就是就是见证我的见鬼历程：
1. 安装libvirt-python（版本号1.3.2）失败
Collecting libvirt-python===1.3.2 (from -c /opt/stack/requirements/upper-constraints.txt (line 175))
2017-04-06 11:47:50.690 | Downloading libvirt-python-1.3.2.tar.gz (171kB)
2017-04-06 11:47:52.591 | Building wheels for collected packages: libvirt-python
2017-04-06 11:47:52.591 | Running setup.py bdist_wheel for libvirt-python: started
2017-04-06 11:47:53.784 | Running setup.py bdist_wheel for libvirt-python: finished with status 'error'
2017-04-06 11:47:53.784 | Complete output from command /usr/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-w7PHef/libvirt-python/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_wheel -d /tmp/tmpIu3e9Ypip-wheel- --python-tag cp27:
2017-04-06 11:47:53.784 | running bdist_wheel
2017-04-06 11:47:53.784 | running build
2017-04-06 11:47:53.785 | /usr/bin/pkg-config --print-errors --atleast-version=0.9.11 libvirt
2017-04-06 11:47:53.785 | /usr/bin/python generator.py libvirt /usr/share/libvirt/api/libvirt-api.xml
2017-04-06 11:47:53.785 | Found 413 functions in /usr/share/libvirt/api/libvirt-api.xml
2017-04-06 11:47:53.785 | Found 0 functions in libvirt-override-api.xml
2017-04-06 11:47:53.785 | Generated 341 wrapper functions
2017-04-06 11:47:53.785 | Missing type converters:
2017-04-06 11:47:53.785 | virTypedParameterPtr:1
2017-04-06 11:47:53.785 | virTypedParameterPtr *:2
2017-04-06 11:47:53.785 | virConnectStoragePoolEventGenericCallback:1
2017-04-06 11:47:53.785 | ERROR: failed virConnectStoragePoolEventRegisterAny
2017-04-06 11:47:53.785 | ERROR: failed virDomainGetGuestVcpus
2017-04-06 11:47:53.785 | ERROR: failed virDomainGetPerfEvents
2017-04-06 11:47:53.785 | ERROR: failed virDomainSetPerfEvents
2017-04-06 11:47:53.785 | error: command '/usr/bin/python' failed with exit status 1这个问题，googole了好长时间，最后总算是明白了点儿，大概的意思就是libvirt-python的版本低了，在2.0.0版本给修复了。于是往回扒安装日志，逮着猫一眼，重点就在这里：
2017-04-06 11:47:50.087 | Collecting libvirt-python===1.3.2 (from -c /opt/stack/requirements/upper-constraints.txt (line 175))发现这个包名和版本信息是从一个叫：/opt/stack/requirements/upper-constraints.txt的文件的175行中读取的。
果断改成2.0.0:
当然，还有一个文件也得改：
/opt/stack/requirements/global-requirements.txt：
再来一遍，发现还是到这里失败了，安装的还是1.3.2版本，我就纳闷了。后来想了想，原来是这个地方有问题：
[[local|localrc]]
...
RECLONE=True
...这个参数，意思再明显不过了，每次安装就重新git clone，导致我们的改动无效，只需要将它改为False即可，再来一次！
正当我泡完一杯茶回来，准备庆幸的时候，又双叒叕报错了！哎，啥都不说了，心塞！
openstacksdk 版本又低了，还是上边那两个步骤，将openstacksdk版本改为9.11:
齐活！再来！
半个小时的寂寞等待之后，终于成功了。