openstack奠基篇：devstack （liberty）于centos 7安装

Posted on 2016-01-12 15:56 shihuc 阅读(1515) 评论(2) 编辑收藏举报

openstack是什么，能做什么，我就不说了，他的优势和伟大，可以想想AWS的云服务平台。学习和研究openstack（IaaS）,个人的习惯是有一个可以操作的平台，然后结合代码看看详细逻辑，这个过程，最好的选择就是devstack了，一个单机安装openstack的最佳选择，简化了我们的入门难度。

第一步，下载源码(注意版本不要忘记了哦，否则下载的可能就是master分支的东西了，这个可能会遇到奇奇怪怪的问题的，我自然遇到过，因为这个不是stable的，就不说了。。。)：

1 git clone https://git.openstack.org/openstack-dev/devstack -b stable/liberty

然后将devstack/samples下面的local.conf拷贝到devstack目录下，修改一下里面的内容，根据自己的需要吧，初次安装，还是简单点，默认应该也行。或者直接在devstack目录下新建一个localrc的文件。我修改的local.conf主要内容如下：

 1 # Misc
 2 ADMIN_PASSWORD=shihuc
 3 DATABASE_PASSWORD=$ADMIN_PASSWORD
 4 RABBIT_PASSWORD=$ADMIN_PASSWORD
 5 SERVICE_PASSWORD=$ADMIN_PASSWORD
 6 SERVICE_TOKEN=$ADMIN_PASSWORD
 7 
 8 # Target Path
 9 DEST=/opt/stack
10 
11 # Enable Logging
12 LOGFILE=$DEST/logs/stack.sh.log
13 VERBOSE=True
14 LOG_COLOR=True
15 SCREEN_LOGDIR=$DEST/logs
16 
17 KEYSTONE_TOKEN_FORMAT=UUID
18 
19 # Nova
20 enable_service n-novnc n-cauth
21 
22 # Neutron
23 disable_service n-net
24 ENABLED_SERVICES+=,q-svc,q-agt,q-dhcp,q-l3,q-meta,neutron
25 ENABLED_SERVICES+=,q-lbaas,q-vpn,q-fwaas
26 
27 # Swift
28 #enable_service s-proxy s-object s-container s-accounts
29 #SWIFT_HASH=66a3d6b56c1f479c8b4e70ab5c2000f5
30 
31 # Cinder
32 VOLUME_GROUP="cinder-volumes"
33 ENABLED_SERVICES+=,cinder,c-api,c-vol,c-sch,c-bak
34 
35 # Ceilometer
36 #enable_service ceilometer-acompute ceilometer-acentral ceilometer-anotification ceilometer-collector ceilometer-api
37 #enable_service ceilometer-alarm-notifier ceilometer-alarm-evaluator
38 
39 # Heat
40 enable_service heat h-api h-api-cfn h-api-cw h-eng
41 enable_service tempest
42 
43 # Trove
44 enable_service trove tr-api tr-tmgr tr-cond
45 
46 # Sahara
47 enable_service sahara
48 
49 HOST_IP=10.121.2.117
50 FIXED_RANGE=10.121.2.0/24
51 NETWORK_GATEWAY=10.121.2.1
52 #FLOATING_RANGE=10.0.0.0/24
53 #PUBLIC_NETWORK_GATEWAY=10.0.0.2
54 #Q_FLOATING_ALLOCATION_POOL=start=10.0.0.100,end=10.0.0.150

View Code

liberty版本的devstack安装需求是Centos要求版本要至少是7，我这里安装用的是7.2，由于自己工作用的Linux OS是centos6.4，我尝试将devstack的local.conf里面添加FORCE=True，最终安装还是不成功，第一个错误如下：

1 [root@CloudGame tools]# ./create-stack-user.sh 
2 /mnt/workwps/OpenCloud/devstack/functions-common: line 130: conditional binary operator expected

这个问题，非常诡异，应该是shell版本的问题吧，上面的错误所在的源代码如下：

 1  125 
 2  126     $xtrace
 3  127 }
 4  128 
 5  129 function isset {
 6  130     [[ -v "$1" ]]
 7  131 }
 8  132 
 9  133 
10  134 # Control Functions
11  135 # =================

起初，我依据函数名isset猜测这个函数是判断参数是否赋值了，所以我将其改为下面：

1 function isset {
2     #[[ -v "$1" ]]
3     [[ ! -z "$1" ]]
4 }

这个问题是解决了，可以往下面继续执行，但是后面有遇到了其他的问题，pip安装的问题，我本地安装的pip是1.5.5的老版本，可以看下面的错误日志，算是比较容易解决的问题：

 1 2016-01-12 05:12:27.802 | + sudo -H -E python /mnt/workwps/OpenCloud/devstack/files/get-pip.py
 2 2016-01-12 05:12:28.959 | /usr/local/lib/python2.7/site-packages/distribute-0.6.27-py2.7.egg/setuptools/command/install_scripts.py:3: UserWarning: Module pip was already imported from /tmp/tmpIgbaRF/pip.zip/pip/__init__.py, but /usr/local/lib/python2.7/site-packages/pip-1.5.5-py2.7.egg is being added to sys.path
 3 2016-01-12 05:12:28.959 |   from pkg_resources import Distribution, PathMetadata, ensure_directory
 4 2016-01-12 05:12:29.449 | Collecting pip
 5 2016-01-12 05:12:29.523 |   Using cached pip-7.1.2-py2.py3-none-any.whl
 6 2016-01-12 05:12:29.578 | Installing collected packages: pip
 7 2016-01-12 05:12:29.578 |   Found existing installation: pip 1.5.5
 8 2016-01-12 05:12:29.579 |     Uninstalling pip-1.5.5:
 9 2016-01-12 05:12:29.584 |       Successfully uninstalled pip-1.5.5
10 2016-01-12 05:12:30.250 | Successfully installed pip-7.1.2
11 2016-01-12 05:12:30.668 | + [[ -n '' ]]
12 2016-01-12 05:12:30.668 | + pip_install -U setuptools
13 2016-01-12 05:12:30.877 | + sudo -H http_proxy= https_proxy= no_proxy= PIP_FIND_LINKS= /usr/bin/pip install -c /opt/stack/requirements/upper-constraints.txt --upgrade -U setuptools
14 2016-01-12 05:12:30.917 | Traceback (most recent call last):
15 2016-01-12 05:12:30.917 |   File "/usr/bin/pip", line 5, in <module>
16 2016-01-12 05:12:30.917 |     from pkg_resources import load_entry_point
17 2016-01-12 05:12:30.917 |   File "/usr/local/lib/python2.7/site-packages/distribute-0.6.27-py2.7.egg/pkg_resources.py", line 2735, in <module>
18 2016-01-12 05:12:30.917 |     working_set.require(__requires__)
19 2016-01-12 05:12:30.917 |   File "/usr/local/lib/python2.7/site-packages/distribute-0.6.27-py2.7.egg/pkg_resources.py", line 690, in require
20 2016-01-12 05:12:30.917 |     needed = self.resolve(parse_requirements(requirements))
21 2016-01-12 05:12:30.917 |   File "/usr/local/lib/python2.7/site-packages/distribute-0.6.27-py2.7.egg/pkg_resources.py", line 588, in resolve
22 2016-01-12 05:12:30.917 |     raise DistributionNotFound(req)
23 2016-01-12 05:12:30.918 | pkg_resources.DistributionNotFound: pip==1.5.5

后来，为了让脚本不去对我的本地的pip版本进行检查，我手动安装了7.1.2的版本：

 1 [root@CloudGame devstack]# easy_install-2.7 pip==7.1.2
 2 Searching for pip==7.1.2
 3 Reading http://pypi.python.org/simple/pip/
 4 Best match: pip 7.1.2
 5 Downloading https://pypi.python.org/packages/source/p/pip/pip-7.1.2.tar.gz#md5=3823d2343d9f3aaab21cf9c917710196
 6 Processing pip-7.1.2.tar.gz
 7 Writing /tmp/easy_install-_3i7r6/pip-7.1.2/setup.cfg
 8 Running pip-7.1.2/setup.py -q bdist_egg --dist-dir /tmp/easy_install-_3i7r6/pip-7.1.2/egg-dist-tmp-a6bKaB
 9 warning: no previously-included files found matching '.coveragerc'
10 warning: no previously-included files found matching '.mailmap'
11 warning: no previously-included files found matching '.travis.yml'
12 warning: no previously-included files found matching 'pip/_vendor/Makefile'
13 warning: no previously-included files found matching 'tox.ini'
14 warning: no previously-included files found matching 'dev-requirements.txt'
15 no previously-included directories found matching '.travis'
16 no previously-included directories found matching 'docs/_build'
17 no previously-included directories found matching 'contrib'
18 no previously-included directories found matching 'tasks'
19 no previously-included directories found matching 'tests'
20 Removing pip 1.5.5 from easy-install.pth file
21 Adding pip 7.1.2 to easy-install.pth file
22 Installing pip script to /usr/local/bin
23 Installing pip2.7 script to /usr/local/bin
24 Installing pip2 script to /usr/local/bin
25 
26 Installed /usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg
27 Processing dependencies for pip==7.1.2
28 Finished processing dependencies for pip==7.1.2

注意咯，这个安装的路径是在/usr/local/bin下面，而stack.sh脚本中显示的是在/usr/bin下面哟，这个也简单，创建一个软链接就可以了：

[root@CloudGame bin]# ln -s /usr/local/bin/pip pip

接下来，继续在本地的非官方建议的版本上（人家说了，centos要求7以上）折腾，发现还有问题，首先是yum_install epel-release这个操作总失败，其次还有df: `/root/.gvfs': Permission denied，算了，不折腾了，也许这个就是一个走不下去的死路。

最后，我选择了在AWS上创建一个VM，选择了一个platform是CentOS7.2的PV AMI创建了一个机器。2个cpu，8G RAM，估计是没有什么问题的，就一个devstack的安装过程而已！的确，在这个上面确实比较顺利。VM建好后，SSH登录上去，我是在/opt下面进行的所有的操作。下面简单列一下正常的顺序（注意，保证本地git能用）：

Step 1:

1 git clone https://git.openstack.org/openstack-dev/devstack -b stable/liberty

Step 2：

如前面所述的local.conf进行配置local.conf。

Step 3：

devstack运行在非root用户下，下面进行创建和配置stack用户，并且修改属组：

 1 [root@ip-10-121-5-244 tools]# ./create-stack-user.sh
 2 Creating a group called stack
 3 Creating a user called stack
 4 Giving stack user passwordless sudo privileges
 5 
 6 ----------------------------------------------------------------------
 7 [root@ip-10-121-5-244 devstack]# chown -R stack:stack /opt/devstack/
 8 
 9 ----------------------------------------------------------------------
10 [root@ip-10-121-5-244 devstack]# su stack

Step 4：

下面开始执行安装过程的脚本：

1 [root@ip-10-121-5-244 devstack]# ./stack.sh

这个过程会花一段时间哟，耐心等等吧。最终执行完毕后，你会看到下面的congratulation的信息：

1 This is your host IP address: 10.121.5.244
2 This is your host IPv6 address: ::1
3 Horizon is now available at http://10.121.5.244/dashboard
4 Keystone is serving at http://10.121.5.244:5000/
5 The default users are: admin and demo
6 The password: shihuc