知识大全 对Oracle数据库进行容灾
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随着全球信息化时代的到来 信息数据越来越成为企业关注的焦点 即在各种自然灾害或者人为破坏的情况下 如何保证生产数据的安全和关键业务的不中断运行 传统的保护方法离线备份 备份介质异地保存在一定程度上可以解决上述问题 但为了能够对业务系统提供更高的实时性和可靠性 保证关键业务 x 不中断 应对激烈的市场竞争和提高客户满意度 企业必须在IT系统围绕 连续 (BC)主题进行构建 实施业务连续/容灾备份计划 包括业务连续性 高可用性管理 容灾 数据复制和恢复方案 安全等 下面就对数据复制技术做一个简单的介绍根据数据复制运行的位置 可以将数据复制方式分为以下四种
基于存储(Storage Based) 代表厂商有EMC SRDF IBM PPRC/GDPS HP BusinessCopy HDS TrueCopy等 特点对主机透明 对应用系统的影响较小 技术成熟 有较多的成功案例 但是投资较大 对网络连接的要求也较高
基于服务器(Host based) 代表厂商主要是Symantec公司的Veritas Volume Replicator (VVR) 是存储卷的复制技术 需要占用主机一定的系统资源
基于存储交换机(SAN Based) 运行于挂接在存储网络上的专用设备中 代表厂商有CISCO的SANTap FalconStor IPStor Topio SANsafe DataCore SANsymphony Asynchronous Internet Mirroring (AIM)等
基于数据库/软件应用 :代表厂商有Oracle DataGuard Quest SharePlex IBM DB 的远程Q复制 SYBASE的复制服务器(Replication Server) 等 这些技术都是对数据逻辑操作的复制 属于逻辑数据复制 而其它 种复制的是数据卷中的数据变化 属于物理数据复制 典型的逻辑数据复制是通过数据库日志实现的 优点是硬件投资小 对生产系统的影响比较小 对主 备用系统的硬件平台没有选择性;可以在广域网范围内使用 但它对数据库系统有严格的要求 并且主 备用系统必须使用相同的数据库版本
上面介绍的主要的各厂商方案和产品可以参见下图
本文主要介绍基于主机和逻辑卷的数据复制VVR
VERITAS的VVR(Veritas Volume Replicator)是用于有效的灾难恢复的数据复制软件 可以连续对应用数据进行一个或者多个的拷贝保护 具有的优点主要有 高性能 距离不限 支持异构的存储和操作系统 对数据的连续保护 支持同步和异步复制
VVR系统架构如下图
VVR具有的系统特性如下
( ) 最高支持 个远程节点 可以通过基于IP的LAN或者WAN网络;
( ) 通过对逻辑卷的同步和异步复制模式 保证数据的完整性和一致性;
( ) 确保备用节点和主节点的数据具有相同的写入顺序;
( ) 支持对网络带宽的管理和定义 支持多链路的连接;
( ) 支持对备用节点的脱机操作 以便在备用节点进行查询(例如DSS决策支持系统)或者数据备份;
( ) 易管理 同时支持命令行和图形界面(VEA);
( ) 主备节点之间支持多种异构存储;
( ) 支持不同操作系统平台之间的复制;(注 在本文中 因为设计到Oracle数据库的复制 所以主备操作系统必须同一类型 比如必须都是Solaris平台 版本完全相同的Oracle版本)
( ) 支持主流关系数据库系统 包括Oracle DB Sybase和Informix 数据文件的存放格式包括逻辑卷(裸设备)或者文件系统;
( ) 支持共享的集群环境中的逻辑卷复制 比如Oracle RAC (Real Application Clusters) (注 本文中采用的是单节点Oracle复制);
( ) 支持Veritas volume set;
( ) 支持PDC (Portable Data Container)环境的数据复制;
VVR数据复制系统主要由下面五个组件组成
■ Replicated Volume Group (RVG) 复制卷组
RVG是位于VxVM 磁盘组(DG)内的一组逻辑卷 RVG隶属于磁盘组的一部分 通过定义这些逻辑卷
应用对逻辑卷的写操作都可以保持以主节点上同样的顺序 来写到备用节点上
对于多数数据库系统来说 都是由一些特定的进程完成对磁盘的写操作 比如Oracle系统中的LOWR
和DBWR进程 而这些写操作总是依照着一定顺序 从而来保证实例恢复中数据的一致和完整 比如
数据库变化通常在写入日志文件后才会写入数据文件 所以当日志文件和数据文件属于要复制的不同
逻辑卷的时候 它们必须被定义到同一组RVG中
每组RVG最多可以包括 个数据卷
下面介绍SRL和RLINK 它们也包括在RVG中
■ Storage Replicator Log (SRL)
SRL用于记录RVG中数据写操作的日志 并循环被使用 每个RVG包括一个SRL 数据在写入RVG中的卷之前 首先要写到主节点的SRL中
从VxVM的角度来看 SRL是一个单独的卷 因为所有的写操作首先要写到SRL中 这个卷需要有较好的写性能 所以多数情况下需要对这个卷进行条带化 并且在不同的盘上mirror以保护数据 同时数据卷和SRL卷最好分布在不同的物理磁盘上以得到更好的性能
不允许人工直接对SRL进行访问
■ Replication Link—RLINK
用于连接主RVG和备用RVG之间的一个 链接 一个主的RVG最多可以有 个RLINK 可以定义RLINK
的多个属性来调整数据复制的参数 比如指定复制的网络
■ Data Change Map (DCM)
■ Replicated Data Set (RDS)
一个RDS包括了所有的主节点和备用节点的复制卷组(RVG) RDS不是一个具体存在的对象 而是一个VVR复制技术中的一个概念
在异步模式下VVR的数据复制和数据流向
在同步模式下VVR的数据复制和数据流向
另外 VVR是Veritas Volume Manager (VxVM)的一个单独的option 需要单独的license
Veritas Volume Replicator 的安装
主备节点硬件和软件配置和版本如下
主节点 机器名 lxsfrac
Sun Microsystems Sun Fire X Server
操作系统 solaris u x _
VVR版本: Veritas Volume Replicator GA
Oracle 版本 Oracle gR Enterprise Edition
磁盘阵列 SAN/ HDS AMS
Public网卡 e g 私有(复制)网卡 e g
备用节点机器名 lxsfrac
软硬件环境与主节点相同
两个节点分别安装VVR和vxfs 安装方法相同 以lxsfrac 为例
放入安装介质 一般Solaris都由vold进程自动mount CD
如果需要手工
mount mount –F hsfs –o ro /dev/dsk/c t d s /cdrom root@lxsfrac # cd /volume_replicator/ root@lxsfrac # ls copyright docs installvvr pkgs release_notes scripts tools uninstallvvr root@lxsfrac # ls l total rw r r root root Dec copyright drwxrwxr x root root Jun : docs rwxr xr x root root Apr installvvr drwxrwxr x root root Jun : pkgs drwxrwxr x root root Jun : release_notes drwxrwxr x root root Jun : scripts drwxrwxr x root root Jun : tools rwxr xr x root root Apr uninstallvvr root@lxsfrac # /installvvr lxsfrac Veritas Volume Replicator Installation Program Copyright (c) Symantec Corporation All rights reserved Symantec the Symantec Logo are trademarks or registered trademarks of Symantec Corporation or its affiliates in the U S and other countries Other names may be trademarks of their respective owners The Licensed Sofare and Documentation are deemed to be mercial puter sofare and mercial puter sofare documentation as defined in FAR Sections and DFARS Section Logs for installvvr are being created in /var/tmp/installvvr mrk Y Initial system check: Checking VVR installation on lxsfrac not installed Checking architecture on lxsfrac i Veritas Volume Replicator Installation Program Checking system licensing Installing licensing packages VVR is not licensed on lxsfrac Enter a VVR license key for lxsfrac : ****************** ****************** successfully registered on lxsfrac Permanent VVR license registered on lxsfrac Do you want to enter another license key for lxsfrac ? [y n q] (n) Veritas Volume Replicator Installation Program Checking installed packages on lxsfrac Veritas Volume Replicator Installation Program VVR can be installed without optional packages to conserve disk space Additional packages are typically installed to simplify future upgrades ) Required Veritas Volume Replicator packages MB required ) All Veritas Volume Replicator packages MB required ) Storage Foundation Enterprise packages MB required Select the packages to be installed on all systems? [ q ?] ( ) Veritas Volume Replicator Installation Program The following VVR packages will be installed: VRTSperl Veritas Perl Redistribution VRTSvlic Veritas Licensing VRTSicsco Symantec Common Infrastructure VRTSpbx Symantec Private Branch Exchange VRTSsmf Symantec Service Management Framework VRTSat Symantec Product Authentication Service VRTSobc Veritas Enterprise Administrator Core Service VRTSob Veritas Enterprise Administrator Service VRTSobgui Veritas Enterprise Administrator VRTSccg Veritas Enterprise Administrator Central Control Grid VRTSmh Veritas Storage Foundation Managed Host by Symantec VRTSaa Veritas Enterprise Administrator Action Agent VRTSspt Veritas Sofare Support Tools SYMClma Symantec License Inventory Agent VRTSvxvm Veritas Volume Manager Binaries VRTSdsa Veritas Datacenter Storage Agent VRTSfspro Veritas File System Management Services Provider VRTSvmman Veritas Volume Manager Manual Pages VRTSvmdoc Veritas Volume Manager Documentation Press [Return] to continue: ntinued: VRTSdcli Veritas Distributed Command Line Interface VRTSalloc Veritas Volume Manager Intelligent Storage Provisioning VRTSvmpro Veritas Volume Manager Management Services Provider VRTSddlpr Veritas Device Discovery Layer Services Provider VRTSvrpro Veritas Volume Replicator Client Extension and Provider for Veritas Enterprise Administrator VRTSvcsvr Veritas Cluster Server Agents for VVR VRTSjre Veritas Java Runtime Environment Redistribution VRTSjre Veritas Java Runtime Environment Redistribution VRTSweb Veritas Java Web Server VRTSvrw Veritas Volume Replicator Web Console VRTSvrdoc Veritas Volume Replicator Documentation Press [Return] to continue: Checking for any AP driver issues on lxsfrac None A copy of a previous VxVM configuration is present on the system lxsfrac Do you want to restore and reuse the previous VxVM configuration of system lxsfrac [y n q ?] (y) n Veritas Volume Replicator Installation Program Installing VVR: % ■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■ Installation pleted successfully on all systems It is optional to configure VVR now If you choose to configure VVR later you can either do so manually or run the installvvr configure mand The product installation scripts can be found in /opt/VRTS/install directory Are you ready to configure VVR? [y n q] (y) The enclosure based naming scheme is a feature of Veritas Volume Manager It allows one to reference disks using a symbolic name that is more meaningful than the operating system s normal device access name This symbolic name is typically derived from the array name Do you want to set up the enclosure based naming scheme? [y n q ?] (n) y Veritas Volume Replicator Installation Program Veritas Volume Manager default disk group name configuration: Many Veritas Volume Manager mands affect the contents or configuration of a disk group Such mands require that the user specify a disk group This is acplished by using the g option of a mand or setting the VXVM_DEFAULTDG environment variable An alternative to these o methods for some mands is to configure the name of the default disk group of a system Note: The default disk group feature is not available with the DCLI vxadm( M) and vxquery( M) mands When using these mands a required disk group must be explicitly identified using the g option Do you want to set up a default disk group for each system? [y n q ?] (y) n Veritas Volume Replicator Installation Program Following are the default ports that will be used by VVR on lxsfrac : Port for VVR heartbeat munication: Port for vradmind daemon: Port for vxrsyncd daemon: Ports for data replication: Anonymous Ports The ports indicated for VVR heartbeats and vradmind are IANA assigned The port settings should be identical for systems that will be part of the same Replicated Data Set They should also be identical for all the systems in a cluster Do you want to change any of the VVR ports on lxsfrac ? [y n q] (n) Veritas Volume Replicator Installation Program VVR Statistics Collection Tool The VVR administrative daemon vradmind can collect and maintain various statistics which are helpful in solving VVR performance issues This collection can be tuned using a few tunables like the frequency for gathering the statistics and the number of days for which the collected statistics should be preserved after which the earlier statistics are automatically deleted The frequency of VVR statistics collection on lxsfrac is set to per seconds Do you want to change the frequency of VVR statistics collection on lxsfrac ? [y n q] (n) The maximum number of days for which VVR statistics can be retained is set to on lxsfrac Do you want to change the maximum number of days for retaining VVR statistics on lxsfrac ? [y n q] (n) Veritas Volume Replicator Installation Program Configuration of VVR tunables (For the advanced user) Do you want to view or modify VVR tunables on lxsfrac ? [y n q ?] (n) Veritas Volume Replicator Installation Program Verify the install systems Fully Qualified Hostnames Querying fully qualified domain name of host lxsfrac fail Press [Return] to continue: Unable to find FQHN for lxsfrac ! Enter the fully qualified hostname of lxsfrac or QUIT to quit install Enter the fully qualified host name: lxsfrac Veritas Volume Replicator Installation Program Choose how this install will be managed This product can configured one of the o following ways: * Storage Foundation Management Server managed host (Remended) * Standalone host Pre requisites for Storage Foundation Management Server managed host: * A Storage Foundation Management Server (SFMS) is configured * SFMS should be currently running and fully operational * Authentication Broker that is used by SFMS should be running The following information would be requested during configuration: * The host name of the SFMS * Previously set SFMS agent account password There are no pre requisites for deploying as a standalone host Enabling Storage Foundation Management Server management simplifies and improves management of the plex data center resources reducing planned and unplanned down time Enable Storage Foundation Management Server Management? [y n q] (y) n Veritas Volume Replicator Installation Program Verify the install systems Fully Qualified Hostnames Configuring VEA in STANDALONE mode on lxsfrac ok Configuring gridnode on lxsfrac ok Registering gridnode on lxsfrac ok Configuring actionagent on lxsfrac ok Registering actionagent on lxsfrac ok Registering StorageAgent on lxsfrac ok Do you want to start Veritas Volume Replicator processes now? [y n q] (y) Veritas Volume Replicator Installation Program Starting VVR: % ■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■ Startup pleted successfully on all systems You declined to set up the name of the default disk group for lxsfrac Installation log files summary file and response file are saved at: /opt/VRTS/install/logs/installvvr mrk Y To enable Dynamic Multi Pathing (DMP) MPxIO must be disabled Refer to the Storage Foundation Release Notes for further details on disabling MPxIO 检查vradmin deamon root@lxsfrac # ps ef|grep vrad|grep v grep root : : ? : /usr/sbin/vradmind 安装Veritas File System 安装过程略 root@lxsfrac # cd file_system/ root@lxsfrac # ls l total rw r r root root Dec copyright drwxrwxr x root root Jun : docs rwxr xr x root root Apr installfs drwxrwxr x root root Jun : pkgs drwxrwxr x root root Jun : release_notes drwxrwxr x root root Jun : scripts rwxr xr x root root Apr uninstallfs root@lxsfrac # /installfs lxsfrac
Veritas Volume Replicator VVR的配置
两个节点上都需要做
修改两个节点的/etc/hosts
lxsfrac
lxsfrac
lxsfrac priv
lxsfrac priv
分别创建私有网络(专有) 建议数据复制使用专用网络
root@lxsfrac # ifconfig e g plumb netmask up
root@lxsfrac # ifconfig e g plumb netmask up
root@lxsfrac # ping
is alive
创建相同名称的磁盘组(含有最少两个磁盘) 相同名称数据卷oravol 创建复制日志卷(SRL)
分别在本地安装Oracle gR (安装Oracle过程略 )
root@lxsfrac # vxdg init oradg AMS_WMS _ AMS_WMS _
root@lxsfrac # vxassist g oradg make oravol g
root@lxsfrac # vxedit g oradg set user=oracle group=dba mode= oravol
root@lxsfrac # vxassist g oradg make srl m
在备用节点上修改配置文件/etc/vx/vras/ rdg 让其包含主节点上的disk group ID
(这里是 lxsfrac ) 当创建备用RVG时 这个文件用来对主节点的授权
可以通过vxprint –l来得到disk group ID
root@lxsfrac # vi /etc/vx/vras/ rdg
………
lxsfrac
/etc/vx/vras/ rdg lines characters
在主节点上
创建vxfs文件系统
mount F vxfs o largefiles /dev/vx/dsk/oradg/oravol /oracle
chown oracle:dba /oracle
切换到oracle用户使用dbca建库 并且所有数据文件选择/oracle目录
创建Primary RVG
root@lxsfrac # vradmin g oradg createpri ora_rvg oravol srl
其中的oravol是要复制的数据卷列表 当多于一个时 用逗号隔开
创建Secondary RVG
root@lxsfrac # vradmin g oradg addsec ora_rvg lxsfrac priv lxsfrac priv
设置复制方式为异步
root@lxsfrac # vradmin g oradg set ora_rvg lxsfrac priv synchronous=off
开始复制
root@lxsfrac # vradmin g oradg a startrep ora_rvg Message from Primary: VxVM VVR vxrlink WARNING V Attaching rlink to non empty rvg Autosync will be performed VxVM VVR vxrlink INFO V Secondary data volumes detected with rvg ora_rvg as parent: VxVM VVR vxrlink INFO V oravol: len= primary_datavol=oravol VxVM VVR vxrlink INFO V Autosync operation has started root@lxsfrac # root@lxsfrac # vradmin g oradg f startrep ora_rvg VxVM VVR vradmin INFO V Replication to Secondary host lxsfrac priv already started
检查相关信息和状态 显示数据复制过程 可以通过使用 i参数指定interval
root@lxsfrac # vxrvg g oradg getrlinks ora_rvg rlk_lxsfrac priv_ora_rvg root@lxsfrac # vxrlink g oradg status rlk_lxsfrac priv_ora_rvg Fri Nov : : VxVM VVR vxrlink INFO V Rlink rlk_lxsfrac priv_ora_rvg is in AUTOSYNC Kbytes remaining root@lxsfrac # vxrlink g oradg status rlk_lxsfrac priv_ora_rvg Fri Nov : : VxVM VVR vxrlink INFO V Rlink rlk_lxsfrac priv_ora_rvg is in AUTOSYNC Kbytes remaining root@lxsfrac # vxrlink g oradg status rlk_lxsfrac priv_ora_rvg Fri Nov : : VxVM VVR vxrlink INFO V Rlink rlk_lxsfrac priv_ora_rvg is in AUTOSYNC Kbytes remaining root@lxsfrac # vxrlink g oradg status rlk_lxsfrac priv_ora_rvg Fri Nov : : VxVM VVR vxrlink INFO V Rlink rlk_lxsfrac priv_ora_rvg is up to date
可以手工进行gracefully切换
root@lxsfrac # umount /oracle root@lxsfrac # vradmin g oradg migrate ora_rvg lxsfrac priv VxVM VVR vradmin WARNING V Make sure applications using Primary data volumes are stopped vradmin: Continue with migrate (y/n)? y root@lxsfrac #
下面我们就在上面搭建好的VVR环境中对容灾数据进行切换测试
注 在下面测试中 主节点为lxsfrac 备用节点为lxsfrac
====================================== 显示主备节点状态 ================================= root@lxsfrac # vradmin g oradg l repstatus ora_rvg Replicated Data Set: ora_rvg Primary: Host name: lxsfrac priv RVG name: ora_rvg DG name: oradg RVG state: enabled for I/O Data volumes: VSets: SRL name: srl SRL size: M Total secondaries: Secondary: Host name: lxsfrac priv RVG name: ora_rvg DG name: oradg Rlink from Primary: rlk_lxsfrac priv_ora_rvg Rlink to Primary: rlk_lxsfrac priv_ora_rvg Configured mode: asynchronous Latency protection: off SRL protection: autodcm Data status: inconsistent Replication status: resync in progress (autosync) Current mode: asynchronous Logging to: DCM (contains Kbytes) (autosync) Timestamp Information: N/A Bandwidth Limit: N/A ==================================== 显示replication link状态 ================================= root@lxsfrac # vxrlink g oradg status rlk_lxsfrac priv_ora_rvg Mon Nov : : VxVM VVR vxrlink INFO V Rlink rlk_lxsfrac priv_ora_rvg is up to date ==================================== 在主节点插入试验数据 : ================================ oracle@lxsfrac $ sysdba SQL*Plus: Release Production on Mon Nov : : Copyright (c) Oracle All rights reserved Connected to: Oracle Database g Enterprise Edition Release Production With the Partitioning OLAP and Data Mining options SQL> create table test (a varchar( ) ) tablespace users ; Table created SQL> insert into test values ( ) ; row created SQL> mit ; Commit plete SQL> insert into test values ( ) ; row created SQL> SQL> SQL> mit ; Commit plete ====================================== 立即异常关闭oracle 和 操作系统 ============================ root@lxsfrac # ps ef|egrep ora_|asm_ |grep v grep |grep v crs|awk print $ |xargs kill root@lxsfrac # root@lxsfrac # ps ef|grep ora root : : ? : /opt/VRTSobc/pal /bin/vxpal a StorageAgent x oracle : : ? : oracleracg (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq))) oracle : : pts/ : bash oracle : : pts/ : sqlplus /as sysdba root : : pts/ : grep ora root@lxsfrac # root@lxsfrac # poweroff 从系统日志/var/tmp/messages可以查看到相关信息 Nov : : lxsfrac poweroff: [ID auth crit] poweroffed by root ======================================= 在备用节点进行接管 ======================================= root@lxsfrac # vradmin g oradg migrate ora_rvg lxsfrac priv VxVM VVR vradmin WARNING V Make sure applications using Primary data volumes are stopped vradmin: Continue with migrate (y/n)? y Message from Host lxsfrac priv: VxVM VVR vradmin ERROR V Secondary ora_rvg does not have an active Primary root@lxsfrac # root@lxsfrac # vradmin g oradg takeover ora_rvg root@lxsfrac # date Mon Nov : : CST root@lxsfrac # vxprint htqg oradg dg oradg default default lxsfrac dm AMS_WMS _ AMS_WMS _ auto dm AMS_WMS _ AMS_WMS _ auto rv ora_rvg ENABLED ACTIVE primary srl rl rlk_lxsfrac priv_ora_rvg ora_rvg ENABLED ACTIVE lxsfrac priv oradg rlk_lxsfrac priv_ora_rvg v oravol ora_rvg ENABLED ACTIVE SELECT fsgen pl oravol oravol ENABLED ACTIVE CONCAT RW sd AMS_WMS _ oravol AMS_WMS _ AMS_WMS _ ENA pl oravol oravol ENABLED ACTIVE LOGONLY CONCAT RW sd AMS_WMS _ oravol AMS_WMS _ LOG AMS_WMS _ ENA pl oravol oravol ENABLED ACTIVE LOGONLY CONCAT RW sd AMS_WMS _ oravol AMS_WMS _ LOG AMS_WMS _ ENA v srl ora_rvg ENABLED ACTIVE SELECT SRL pl srl srl ENABLED ACTIVE CONCAT RW sd AMS_WMS _ srl AMS_WMS _ AMS_WMS _ ENA root@lxsfrac # ================================ 启动备用节点Oracle数据库 并检查数据完整 ======================== root@lxsfrac # mount F vxfs /dev/vx/dsk/oradg/oravol /oracle root@lxsfrac # root@lxsfrac # su oracle Sun Microsystems Inc SunOS Generic January oracle@lxsfrac $ sysdba SQL*Plus: Release Production on Mon Nov : : Copyright (c) Oracle All rights reserved Connected to an idle instance SQL> startup ORACLE instance started Total System Global Area bytes Fixed Size bytes Variable Size bytes Database Buffers bytes Redo Buffers bytes Database mounted Database opened SQL> select * from test ; A
================================ 显示数据正常 ===========================
在第二个节点vxdg import oradg
然后recover
直到两个节点vxprint htqg oradg都正常 ENABLED/ACTIVE
错误V 我遇到了两次 一次是在createpri 一次在addsec 原因是主备的DCM默认都需要mirror 所以所在的磁盘组都最少包括两块磁盘(或LUN) 通过vxdg g oradg adddisk another_disk解决
root@lxsfrac # vradmin g oradg createpri ora_rvg \\ > system sysaux temp users example ctlfile ctlfile ctlfile redo redo redo undo spfile \\ > srl Message from Primary: VxVM vxassist ERROR V Cannot allocate space for block log root@lxsfrac # vradmin g oradg addsec ora_rvg lxsfrac priv lxsfrac priv Message from Host lxsfrac priv: VxVM vxassist ERROR V Cannot allocate space for block log
检查vvr后台进程
root@lxsfrac # ps ef|grep vrad|grep v grep root : : ? : /usr/sbin/vradmind
如果进程状态不对 使用下面语句来手工启动
/etc/init d/vras vradmind sh start
可以看到vradmin是随系统自启动的
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