學習Openstack的前兩個月, 時間都花在環境部署上了, 主要是版本的問題, 導致了一系列的麻煩. 之前使用devstack已經部署成功了, 但是manila不能用, 殘念, 問題主要出在網路上, 研究完manila的網路模組之後再回頭找原因吧. 不打算繼續在環境上花時間了, 這裡給了一套可以重複的安裝部署流程, 使用packstack.

1. 安裝環境

虛擬機器軟體: VirtualBox
Centos映象: CentOS-7-x86_64-DVD-1511(1).iso
網路: 一張NAT網絡卡 (預設IP: 10.0.2.15)

2. packstack安裝過程

2.1 增加對packstack的解析

安裝過程中可能會出現以下錯誤:

* unable to connect to epmd (port 4369) on packstack

原因是因為配置檔案裡將該程序放到了packstack這臺主機上. 為了解決這個問題, 增加域名解析就行了:

[root@packstack ~]# uname -a
[root@packstack ~]# vim /etc/hosts
10.0.2.15   packstack
192.168.9.217   server

其中, server是我自己搭建的Centos7的本地源. 不使用本地源的不用增加這一項.

2.2 修改Centos和epel源

(1) Centos源

[root@packstack ~]# cd /etc/yum.repos.d/
[root@packstack ~]# mkdir bak
[root@packstack ~]# mv CentOS-* bak/
[root@packstack ~]# mv local_mitaka.repo /etc/yum.repos.d/

這裡我使用了本地源. 沒有搭建本地源的朋友直接修改成阿里雲開源映象即可. 方法類似下面的epel源.

(2) epel源

[root@packstack ~]# wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
 

[root@packstack ~]# yum clean all
[root@packstack ~]# yum makecache

2.3 關防火牆和seliunx

[root@packstack ~]# systemctl stop firewalld
[root@packstack ~]# systemctl disable firewalld
[root@packstack ~]# vim /etc/selinux/config 
SELINUX=disabled

2.4 安裝packstack包

[root@packstack ~]# yum -y install centos-release-openstack-mitaka epel-release 
[root@packstack ~]# yum -y install openstack-packstack

2.5 準備answer檔案

answer檔案根據我自己的環境修改過, 在下一篇部落格中我將給出完整的檔案.

[root@packstack ~]# touch packstack-answers-20160915-011640.txt_serverworld第二個版本有manila
[root@packstack ~]# vim packstack-answers-20160915-011640.txt_serverworld第二個版本有manila 

2.6 開始安裝

[root@packstack ~]# packstack --answer-file packstack-answers-20160915-011640.txt_serverworld第二個版本有manila 

2.7 切換許可權

[root@packstack ~]# source keystonerc_admin 
[root@packstack ~]# cat keystonerc_admin 
[root@packstack ~(keystone_admin)]# manila pool-list
+------+------+---------+------+
| Name | Host | Backend | Pool |
+------+------+---------+------+
+------+------+---------+------+

因為我的重點是研究manila模組, 所以安裝成功之後第一時間檢查了manila模組. 很遺憾, manila模組安裝失敗. 原因應該是版本的問題, 沒有時間去具體研究指令碼, 下面直接給出解決方案. 這一步成功安裝, 或者不需要manila服務的朋友, 可以不用繼續向下了.

3. manila服務安裝錯誤排查

3.1 檢視日誌

[[email protected] ~]# cat /var/log/manila/share.log | grep ERROR
2016-09-16 11:50:08.123 15388 ERROR oslo_service.periodic_task Traceback (most recent call last):
2016-09-16 11:50:08.123 15388 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/site-packages/oslo_service/periodic_task.py", line 220, in run_periodic_tasks
2016-09-16 11:50:08.123 15388 ERROR oslo_service.periodic_task     task(self, context)
2016-09-16 11:50:08.123 15388 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/site-packages/manila/utils.py", line 615, in wrapper
2016-09-16 11:50:08.123 15388 ERROR oslo_service.periodic_task     raise exception.DriverNotInitialized(driver=driver_name)
2016-09-16 11:50:08.123 15388 ERROR oslo_service.periodic_task DriverNotInitialized: Share driver 'GenericShareDriver' not initialized.

查看了manila幾個程序的日誌後發現, 是manila-share程序出現錯誤. 其實可以理解, 因為manila pool為空, 說明share程序沒有成功管理後端儲存. 更詳細的錯誤資訊如下:

2016-09-15 17:44:06.281 2732 ERROR manila.share.manager [req-c7388245-8da4-44d8-b11a-0788defc2fcc - - - - -] Error encountered during initialization of driver 'GenericShareDriver' on '[email protected]' host. Class CIFSHelper cannot be found (['Traceback (most recent call last):\n', '  File "/usr/lib/python2.7/site-packages/oslo_utils/importutils.py", line 32, in import_class\n    return getattr(sys.modules[mod_str], class_str)\n', "AttributeError: 'module' object has no attribute 'CIFSHelper'\n"])
2016-09-15 17:44:06.281 2732 ERROR manila.share.manager Traceback (most recent call last):
2016-09-15 17:44:06.281 2732 ERROR manila.share.manager   File "/usr/lib/python2.7/site-packages/manila/share/manager.py", line 248, in init_host
2016-09-15 17:44:06.281 2732 ERROR manila.share.manager     self.driver.do_setup(ctxt)
2016-09-15 17:44:06.281 2732 ERROR manila.share.manager   File "/usr/lib/python2.7/site-packages/manila/share/drivers/generic.py", line 177, in do_setup
2016-09-15 17:44:06.281 2732 ERROR manila.share.manager     self._setup_helpers()
2016-09-15 17:44:06.281 2732 ERROR manila.share.manager   File "/usr/lib/python2.7/site-packages/manila/share/drivers/generic.py", line 208, in _setup_helpers
2016-09-15 17:44:06.281 2732 ERROR manila.share.manager     helper = importutils.import_class(import_str)
2016-09-15 17:44:06.281 2732 ERROR manila.share.manager   File "/usr/lib/python2.7/site-packages/oslo_utils/importutils.py", line 36, in import_class
2016-09-15 17:44:06.281 2732 ERROR manila.share.manager     traceback.format_exception(*sys.exc_info())))
2016-09-15 17:44:06.281 2732 ERROR manila.share.manager ImportError: Class CIFSHelper cannot be found (['Traceback (most recent call last):\n', '  File "/usr/lib/python2.7/site-packages/oslo_utils/importutils.py", line 32, in import_class\n    return getattr(sys.modules[mod_str], class_str)\n', "AttributeError: 'module' object has no attribute 'CIFSHelper'\n"])
2016-09-15 17:44:06.281 2732 ERROR manila.share.manager 
2016-09-15 17:45:44.317 2732 ERROR oslo_service.periodic_task [req-a24899f7-4d96-4780-9f52-1d381654ee74 - - - - -] Error during ShareManager._report_driver_status
2016-09-15 17:45:44.317 2732 ERROR oslo_service.periodic_task Traceback (most recent call last):
2016-09-15 17:45:44.317 2732 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/site-packages/oslo_service/periodic_task.py", line 220, in run_periodic_tasks
2016-09-15 17:45:44.317 2732 ERROR oslo_service.periodic_task     task(self, context)
2016-09-15 17:45:44.317 2732 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/site-packages/manila/utils.py", line 615, in wrapper
2016-09-15 17:45:44.317 2732 ERROR oslo_service.periodic_task     raise exception.DriverNotInitialized(driver=driver_name)
2016-09-15 17:45:44.317 2732 ERROR oslo_service.periodic_task DriverNotInitialized: Share driver 'GenericShareDriver' not initialized.

很明顯, 錯誤的根本原因是找不到CIFSHelper這個類. 檢視manila.conf配置檔案, 發現對generic這個後端儲存有如下配置:

share_helpers = CIFS=manila.share.drivers.generic.CIFSHelper,NFS=manila.share.drivers.generic.NFSHelper

這個配置檔案是由packstack生成的, 應該是版本不一致導致了配置檔案資訊有誤. 檢視Liberty版本的manila/manila/share/drivers/generic.py檔案, 發現該檔案有CIFSHelper類. 但是到了Mitaka版本, 該檔案已經沒有這個類了. 因此導致了錯誤. 配置檔案是針對Liberty版本生成的.

下面手動修改配置檔案.

3.2 殺掉share程序

3.3 修改配置檔案

[[email protected] ~(keystone_admin)]# vim /etc/manila/manila.conf
share_helpers = CIFS=manila.share.drivers.helpers.CIFSHelperIPAccess,NFS=manila.share.drivers.helpers.NFSHelper

3.4 重啟manila-share服務

[root@packstack ~]# /usr/bin/python2 /usr/bin/manila-share --config-file /usr/share/manila/manila-dist.conf --config-file /etc/manila/manila.conf --logfile /var/log/manila/share.log

此時再檢視manila pool:

[[email protected] ~(keystone_admin)]# manila pool-list
+---------------------------+-----------+---------+---------+
| Name                      | Host      | Backend | Pool    |
+---------------------------+-----------+---------+---------+
| [email protected]generic#generic | packstack | generic | generic |
+---------------------------+-----------+---------+---------+

4. Permission denied: ‘/var/log/nova/nova-manage.log’

安裝成功後可能還會遇到一個問題, 如下:

[root@packstack ~]# cat /var/spool/mail/root
time:           2016年09月15日 星期四 12時01分05秒
cmdline:        /usr/bin/python2 /bin/nova-manage db archive_deleted_rows --max_rows 100
uid:            162 (nova)
abrt_version:   2.1.11
event_log:      
executable:     /bin/nova-manage
hostname:       packstack
kernel:         3.10.0-327.el7.x86_64
last_occurrence: 1473998463
pid:            24458
pkg_arch:       noarch
pkg_epoch:      1
pkg_name:       openstack-nova-common
pkg_release:    1.el7
pkg_version:    13.1.0
runlevel:       N 5
username:       nova

backtrace:
:__init__.py:925:_open:IOError: [Errno 13] Permission denied: '/var/log/nova/nova-manage.log'
:
:Traceback (most recent call last):
:  File "/bin/nova-manage", line 10, in <module>
:    sys.exit(main())
:  File "/usr/lib/python2.7/site-packages/nova/cmd/manage.py", line 1517, in main
:    logging.setup(CONF, "nova")
:  File "/usr/lib/python2.7/site-packages/oslo_log/log.py", line 243, in setup
:    _setup_logging_from_conf(conf, product_name, version)
:  File "/usr/lib/python2.7/site-packages/oslo_log/log.py", line 319, in _setup_logging_from_conf
:    filelog = file_handler(logpath)
:  File "/usr/lib64/python2.7/logging/handlers.py", line 392, in __init__
:    logging.FileHandler.__init__(self, filename, mode, encoding, delay)
:  File "/usr/lib64/python2.7/logging/__init__.py", line 902, in __init__
:    StreamHandler.__init__(self, self._open())
:  File "/usr/lib64/python2.7/logging/__init__.py", line 925, in _open
:    stream = open(self.baseFilename, self.mode)
:IOError: [Errno 13] Permission denied: '/var/log/nova/nova-manage.log'

解決如下:

[root@packstack ~]# chmod 777 /var/log/nova/nova-manage.log
[root@packstack ~]# su -s /bin/sh -c "nova-manage db sync" nova