Red Hat Training

A Red Hat training course is available for Red Hat Enterprise Linux

4.6. VIRTUAL SERVERS

「​​​​​​​虚​​​​​​​拟​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​」​​​​​​​面​​​​​​​板​​​​​​​显​​​​​​​示​​​​​​​每​​​​​​​个​​​​​​​当​​​​​​​前​​​​​​​定​​​​​​​义​​​​​​​的​​​​​​​虚​​​​​​​拟​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​的​​​​​​​信​​​​​​​息​​​​​​​。​​​​​​​表​​​​​​​格​​​​​​​里​​​​​​​的​​​​​​​每​​​​​​​个​​​​​​​条​​​​​​​目​​​​​​​都​​​​​​​显​​​​​​​示​​​​​​​了​​​​​​​虚​​​​​​​拟​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​的​​​​​​​状​​​​​​​态​​​​​​​、​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​名​​​​​​​称​​​​​​​、​​​​​​​分​​​​​​​配​​​​​​​的​​​​​​​ IP 地​​​​​​​址​​​​​​​、​​​​​​​虚​​​​​​​拟​​​​​​​ IP 的​​​​​​​掩​​​​​​​码​​​​​​​、​​​​​​​服​​​​​​​务​​​​​​​端​​​​​​​口​​​​​​​、​​​​​​​使​​​​​​​用​​​​​​​的​​​​​​​协​​​​​​​议​​​​​​​以​​​​​​​及​​​​​​​虚​​​​​​​拟​​​​​​​设​​​​​​​备​​​​​​​接​​​​​​​口​​​​​​​。​​​​​​​
The VIRTUAL SERVERS Panel

图 4.5. The VIRTUAL SERVERS Panel

「​​​​​​​虚​​​​​​​拟​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​」​​​​​​​面​​​​​​​板​​​​​​​中​​​​​​​显​​​​​​​示​​​​​​​的​​​​​​​每​​​​​​​个​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​都​​​​​​​可​​​​​​​以​​​​​​​在​​​​​​​接​​​​​​​下​​​​​​​来​​​​​​​的​​​​​​​屏​​​​​​​幕​​​​​​​或​​​​​​​子​​​​​​​界​​​​​​​面​​​​​​​（subsections）中​​​​​​​进​​​​​​​行​​​​​​​配​​​​​​​置​​​​​​​。​​​​​​​
点​​​​​​​击​​​​​​​「​​​​​​​添​​​​​​​加​​​​​​​」​​​​​​​按​​​​​​​钮​​​​​​​可​​​​​​​以​​​​​​​添​​​​​​​加​​​​​​​一​​​​​​​个​​​​​​​服​​​​​​​务​​​​​​​。​​​​​​​要​​​​​​​删​​​​​​​除​​​​​​​某​​​​​​​个​​​​​​​服​​​​​​​务​​​​​​​，可​​​​​​​以​​​​​​​选​​​​​​​中​​​​​​​虚​​​​​​​拟​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​旁​​​​​​​的​​​​​​​单​​​​​​​选​​​​​​​按​​​​​​​钮​​​​​​​并​​​​​​​按​​​​​​​「​​​​​​​删​​​​​​​除​​​​​​​」​​​​​​​按​​​​​​​钮​​​​​​​。​​​​​​​
要​​​​​​​启​​​​​​​用​​​​​​​或​​​​​​​禁​​​​​​​用​​​​​​​列​​​​​​​表​​​​​​​中​​​​​​​的​​​​​​​虚​​​​​​​拟​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​，选​​​​​​​中​​​​​​​单​​​​​​​选​​​​​​​框​​​​​​​并​​​​​​​点​​​​​​​击​​​​​​​「​​​​​​​激​​​​​​​活​​​​​​​/取​​​​​​​消​​​​​​​激​​​​​​​活​​​​​​​」​​​​​​​按​​​​​​​钮​​​​​​​。​​​​​​​
添​​​​​​​加​​​​​​​了​​​​​​​虚​​​​​​​拟​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​后​​​​​​​，您​​​​​​​可​​​​​​​以​​​​​​​选​​​​​​​中​​​​​​​其​​​​​​​左​​​​​​​边​​​​​​​的​​​​​​​单​​​​​​​选​​​​​​​按​​​​​​​钮​​​​​​​并​​​​​​​点​​​​​​​击​​​​​​​「​​​​​​​编​​​​​​​辑​​​​​​​」​​​​​​​按​​​​​​​钮​​​​​​​进​​​​​​​入​​​​​​​「​​​​​​​虚​​​​​​​拟​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​」​​​​​​​子​​​​​​​界​​​​​​​面​​​​​​​来​​​​​​​进​​​​​​​行​​​​​​​配​​​​​​​置​​​​​​​。​​​​​​​

4.6.1. 「​​​​​​​虚​​​​​​​拟​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​」​​​​​​​子​​​​​​​界​​​​​​​面​​​​​​​

The VIRTUAL SERVER subsection panel shown in 图 4.6 “The VIRTUAL SERVERS Subsection” allows you to configure an individual virtual server. Links to subsections related specifically to this virtual server are located along the top of the page. But before configuring any of the subsections related to this virtual server, complete this page and click on the ACCEPT button.
The VIRTUAL SERVERS Subsection

图 4.6. The VIRTUAL SERVERS Subsection

Name
输​​​​​​​入​​​​​​​描​​​​​​​述​​​​​​​名​​​​​​​称​​​​​​​来​​​​​​​确​​​​​​​定​​​​​​​虚​​​​​​​拟​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​。​​​​​​​这​​​​​​​个​​​​​​​名​​​​​​​称​​​​​​​不​​​​​​​是​​​​​​​机​​​​​​​器​​​​​​​的​​​​​​​主​​​​​​​机​​​​​​​名​​​​​​​，因​​​​​​​此​​​​​​​可​​​​​​​使​​​​​​​用​​​​​​​具​​​​​​​有​​​​​​​描​​​​​​​述​​​​​​​性​​​​​​​并​​​​​​​容​​​​​​​易​​​​​​​设​​​​​​​别​​​​​​​的​​​​​​​名​​​​​​​称​​​​​​​。​​​​​​​您​​​​​​​甚​​​​​​​至​​​​​​​可​​​​​​​以​​​​​​​参​​​​​​​考​​​​​​​虚​​​​​​​拟​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​使​​​​​​​用​​​​​​​的​​​​​​​协​​​​​​​议​​​​​​​，比​​​​​​​如​​​​​​​ HTTP。​​​​​​​
Application port
请​​​​​​​输​​​​​​​入​​​​​​​用​​​​​​​来​​​​​​​侦​​​​​​​听​​​​​​​服​​​​​​​务​​​​​​​应​​​​​​​用​​​​​​​程​​​​​​​序​​​​​​​的​​​​​​​端​​​​​​​口​​​​​​​号​​​​​​​。​​​​​​​因​​​​​​​为​​​​​​​本​​​​​​​示​​​​​​​例​​​​​​​中​​​​​​​要​​​​​​​侦​​​​​​​听​​​​​​​的​​​​​​​是​​​​​​​ HTTP 服​​​​​​​务​​​​​​​，因​​​​​​​此​​​​​​​使​​​​​​​用​​​​​​​端​​​​​​​口​​​​​​​ 80。​​​​​​​
Protocol
在​​​​​​​下​​​​​​​拉​​​​​​​菜​​​​​​​单​​​​​​​中​​​​​​​选​​​​​​​择​​​​​​​ UDP 或​​​​​​​者​​​​​​​ TCP。​​​​​​​网​​​​​​​页​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​一​​​​​​​般​​​​​​​使​​​​​​​用​​​​​​​ TCP 协​​​​​​​议​​​​​​​进​​​​​​​行​​​​​​​沟​​​​​​​通​​​​​​​，如​​​​​​​上​​​​​​​例​​​​​​​所​​​​​​​示​​​​​​​。​​​​​​​
Virtual IP Address
Enter the virtual server's floating IP address in this text field.
Virtual IP Network Mask
使​​​​​​​用​​​​​​​下​​​​​​​拉​​​​​​​菜​​​​​​​单​​​​​​​为​​​​​​​此​​​​​​​虚​​​​​​​拟​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​设​​​​​​​定​​​​​​​子​​​​​​​网​​​​​​​掩​​​​​​​码​​​​​​​。​​​​​​​
Firewall Mark
不​​​​​​​要​​​​​​​在​​​​​​​此​​​​​​​字​​​​​​​段​​​​​​​输​​​​​​​入​​​​​​​防​​​​​​​火​​​​​​​墙​​​​​​​标​​​​​​​记​​​​​​​整​​​​​​​数​​​​​​​值​​​​​​​，除​​​​​​​非​​​​​​​您​​​​​​​正​​​​​​​在​​​​​​​捆​​​​​​​绑​​​​​​​多​​​​​​​个​​​​​​​端​​​​​​​口​​​​​​​协​​​​​​​议​​​​​​​或​​​​​​​者​​​​​​​为​​​​​​​独​​​​​​​立​​​​​​​但​​​​​​​关​​​​​​​联​​​​​​​的​​​​​​​协​​​​​​​议​​​​​​​创​​​​​​​建​​​​​​​多​​​​​​​端​​​​​​​口​​​​​​​虚​​​​​​​拟​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​。​​​​​​​在​​​​​​​本​​​​​​​示​​​​​​​例​​​​​​​中​​​​​​​，以​​​​​​​上​​​​​​​虚​​​​​​​拟​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​的​​​​​​​「​​​​​​​防​​​​​​​火​​​​​​​墙​​​​​​​标​​​​​​​记​​​​​​​」​​​​​​​为​​​​​​​ 80，因​​​​​​​为​​​​​​​我​​​​​​​们​​​​​​​正​​​​​​​在​​​​​​​使​​​​​​​用​​​​​​​防​​​​​​​火​​​​​​​墙​​​​​​​标​​​​​​​记​​​​​​​值​​​​​​​ 80 在​​​​​​​端​​​​​​​口​​​​​​​ 80 将​​​​​​​连​​​​​​​接​​​​​​​捆​​​​​​​绑​​​​​​​至​​​​​​​ HTTP，在​​​​​​​端​​​​​​​口​​​​​​​ 443 将​​​​​​​连​​​​​​​接​​​​​​​捆​​​​​​​绑​​​​​​​至​​​​​​​ HTTPS。​​​​​​​当​​​​​​​与​​​​​​​持​​​​​​​久​​​​​​​性​​​​​​​合​​​​​​​并​​​​​​​使​​​​​​​用​​​​​​​时​​​​​​​，该​​​​​​​技​​​​​​​术​​​​​​​可​​​​​​​确​​​​​​​保​​​​​​​将​​​​​​​访​​​​​​​问​​​​​​​不​​​​​​​安​​​​​​​全​​​​​​​或​​​​​​​者​​​​​​​安​​​​​​​全​​​​​​​网​​​​​​​页​​​​​​​的​​​​​​​用​​​​​​​户​​​​​​​路​​​​​​​由​​​​​​​到​​​​​​​同​​​​​​​一​​​​​​​个​​​​​​​真​​​​​​​实​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​，并​​​​​​​保​​​​​​​持​​​​​​​此​​​​​​​状​​​​​​​态​​​​​​​。​​​​​​​

警告

Entering a firewall mark in this field allows IPVS to recognize that packets bearing this firewall mark are treated the same, but you must perform further configuration outside of the Piranha Configuration Tool to actually assign the firewall marks. See 第 3.4 节 “多​​​​​​​端​​​​​​​口​​​​​​​服​​​​​​​务​​​​​​​和​​​​​​​ LVS ” for instructions on creating multi-port services and 第 3.5 节 “配​​​​​​​置​​​​​​​ FTP” for creating a highly available FTP virtual server.
Device
输​​​​​​​入​​​​​​​在​​​​​​​「​​​​​​​虚​​​​​​​拟​​​​​​​ IP 地​​​​​​​址​​​​​​​」​​​​​​​字​​​​​​​段​​​​​​​定​​​​​​​义​​​​​​​您​​​​​​​希​​​​​​​望​​​​​​​使​​​​​​​用​​​​​​​浮​​​​​​​动​​​​​​​ IP 地​​​​​​​址​​​​​​​的​​​​​​​网​​​​​​​络​​​​​​​设​​​​​​​备​​​​​​​名​​​​​​​称​​​​​​​。​​​​​​​
您​​​​​​​应​​​​​​​该​​​​​​​将​​​​​​​公​​​​​​​共​​​​​​​浮​​​​​​​动​​​​​​​ IP 地​​​​​​​址​​​​​​​命​​​​​​​名​​​​​​​为​​​​​​​连​​​​​​​接​​​​​​​到​​​​​​​公​​​​​​​共​​​​​​​网​​​​​​​络​​​​​​​的​​​​​​​以​​​​​​​太​​​​​​​网​​​​​​​接​​​​​​​口​​​​​​​的​​​​​​​别​​​​​​​名​​​​​​​。​​​​​​​在​​​​​​​本​​​​​​​示​​​​​​​例​​​​​​​中​​​​​​​，公​​​​​​​共​​​​​​​网​​​​​​​络​​​​​​​位​​​​​​​于​​​​​​​ eth0 接​​​​​​​口​​​​​​​，因​​​​​​​此​​​​​​​设​​​​​​​备​​​​​​​名​​​​​​​称​​​​​​​应​​​​​​​为​​​​​​​ eth0:1。​​​​​​​
Re-entry Time
输​​​​​​​入​​​​​​​一​​​​​​​个​​​​​​​整​​​​​​​数​​​​​​​值​​​​​​​来​​​​​​​定​​​​​​​义​​​​​​​时​​​​​​​间​​​​​​​的​​​​​​​长​​​​​​​度​​​​​​​（以​​​​​​​秒​​​​​​​计​​​​​​​），即​​​​​​​在​​​​​​​激​​​​​​​活​​​​​​​的​​​​​​​ LVS 路​​​​​​​由​​​​​​​器​​​​​​​试​​​​​​​图​​​​​​​在​​​​​​​失​​​​​​​败​​​​​​​后​​​​​​​将​​​​​​​一​​​​​​​个​​​​​​​真​​​​​​​实​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​带​​​​​​​回​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​池​​​​​​​的​​​​​​​时​​​​​​​间​​​​​​​。​​​​​​​
Service Timeout
输​​​​​​​入​​​​​​​一​​​​​​​个​​​​​​​整​​​​​​​数​​​​​​​值​​​​​​​，用​​​​​​​该​​​​​​​数​​​​​​​值​​​​​​​定​​​​​​​义​​​​​​​在​​​​​​​认​​​​​​​为​​​​​​​真​​​​​​​实​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​死​​​​​​​亡​​​​​​​并​​​​​​​将​​​​​​​其​​​​​​​从​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​池​​​​​​​中​​​​​​​删​​​​​​​除​​​​​​​的​​​​​​​时​​​​​​​间​​​​​​​长​​​​​​​度​​​​​​​（以​​​​​​​秒​​​​​​​计​​​​​​​）。​​​​​​​
Quiesce server
当​​​​​​​「​​​​​​​静​​​​​​​默​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​」​​​​​​​单​​​​​​​选​​​​​​​按​​​​​​​钮​​​​​​​被​​​​​​​选​​​​​​​中​​​​​​​后​​​​​​​，每​​​​​​​次​​​​​​​有​​​​​​​新​​​​​​​的​​​​​​​真​​​​​​​实​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​节​​​​​​​点​​​​​​​上​​​​​​​线​​​​​​​时​​​​​​​，最​​​​​​​少​​​​​​​连​​​​​​​接​​​​​​​表​​​​​​​被​​​​​​​重​​​​​​​置​​​​​​​为​​​​​​​ 0，这​​​​​​​样​​​​​​​活​​​​​​​跃​​​​​​​ LVS 路​​​​​​​由​​​​​​​器​​​​​​​就​​​​​​​会​​​​​​​象​​​​​​​所​​​​​​​有​​​​​​​的​​​​​​​真​​​​​​​实​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​都​​​​​​​是​​​​​​​刚​​​​​​​加​​​​​​​入​​​​​​​群​​​​​​​集​​​​​​​一​​​​​​​样​​​​​​​路​​​​​​​由​​​​​​​请​​​​​​​求​​​​​​​。​​​​​​​这​​​​​​​个​​​​​​​选​​​​​​​项​​​​​​​可​​​​​​​以​​​​​​​避​​​​​​​免​​​​​​​当​​​​​​​大​​​​​​​量​​​​​​​的​​​​​​​连​​​​​​​接​​​​​​​进​​​​​​​入​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​池​​​​​​​时​​​​​​​，新​​​​​​​加​​​​​​​入​​​​​​​的​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​超​​​​​​​载​​​​​​​。​​​​​​​
Load monitoring tool
LVS 路​​​​​​​由​​​​​​​器​​​​​​​可​​​​​​​以​​​​​​​用​​​​​​​ rup 或​​​​​​​ ruptime 监​​​​​​​控​​​​​​​不​​​​​​​同​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​上​​​​​​​的​​​​​​​负​​​​​​​载​​​​​​​。​​​​​​​如​​​​​​​果​​​​​​​您​​​​​​​从​​​​​​​下​​​​​​​拉​​​​​​​菜​​​​​​​单​​​​​​​里​​​​​​​选​​​​​​​择​​​​​​​了​​​​​​​ rup，那​​​​​​​么​​​​​​​每​​​​​​​个​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​都​​​​​​​必​​​​​​​须​​​​​​​运​​​​​​​行​​​​​​​ rstatd 服​​​​​​​务​​​​​​​。​​​​​​​如​​​​​​​果​​​​​​​您​​​​​​​选​​​​​​​择​​​​​​​了​​​​​​​ ruptime，每​​​​​​​个​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​都​​​​​​​必​​​​​​​须​​​​​​​运​​​​​​​行​​​​​​​ rwhod 服​​​​​​​务​​​​​​​。​​​​​​​

警告

负​​​​​​​载​​​​​​​监​​​​​​​控​​​​​​​和​​​​​​​负​​​​​​​载​​​​​​​平​​​​​​​衡​​​​​​​不​​​​​​​同​​​​​​​，它​​​​​​​可​​​​​​​导​​​​​​​致​​​​​​​在​​​​​​​与​​​​​​​加​​​​​​​权​​​​​​​调​​​​​​​度​​​​​​​算​​​​​​​法​​​​​​​合​​​​​​​并​​​​​​​使​​​​​​​用​​​​​​​时​​​​​​​难​​​​​​​于​​​​​​​预​​​​​​​测​​​​​​​预​​​​​​​定​​​​​​​的​​​​​​​行​​​​​​​为​​​​​​​。​​​​​​​同​​​​​​​时​​​​​​​，如​​​​​​​果​​​​​​​您​​​​​​​使​​​​​​​用​​​​​​​负​​​​​​​载​​​​​​​监​​​​​​​控​​​​​​​，真​​​​​​​实​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​必​​​​​​​须​​​​​​​是​​​​​​​ Linux 机​​​​​​​器​​​​​​​。​​​​​​​
Scheduling
Select your preferred scheduling algorithm from the drop-down menu. The default is Weighted least-connection. For more information on scheduling algorithms, see 第 1.3.1 节 “调​​​​​​​度​​​​​​​算​​​​​​​法​​​​​​​”.
Persistence
如​​​​​​​果​​​​​​​管​​​​​​​理​​​​​​​员​​​​​​​在​​​​​​​客​​​​​​​户​​​​​​​端​​​​​​​传​​​​​​​送​​​​​​​的​​​​​​​过​​​​​​​程​​​​​​​中​​​​​​​需​​​​​​​要​​​​​​​持​​​​​​​续​​​​​​​连​​​​​​​接​​​​​​​到​​​​​​​虚​​​​​​​拟​​​​​​​服​​​​​​​务​​​​​​​器​​​​​​​，请​​​​​​​在​​​​​​​此​​​​​​​文​​​​​​​本​​​​​​​字​​​​​​​段​​​​​​​输​​​​​​​入​​​​​​​在​​​​​​​连​​​​​​​接​​​​​​​超​​​​​​​时​​​​​​​前​​​​​​​允​​​​​​​许​​​​​​​的​​​​​​​非​​​​​​​激​​​​​​​活​​​​​​​状​​​​​​​态​​​​​​​的​​​​​​​秒​​​​​​​数​​​​​​​。​​​​​​​

重要

If you entered a value in the Firewall Mark field above, you should enter a value for persistence as well. Also, be sure that if you use firewall marks and persistence together, that the amount of persistence is the same for each virtual server with the firewall mark. For more on persistence and firewall marks, refer to 第 1.5 节 “持​​​​​​​久​​​​​​​性​​​​​​​和​​​​​​​防​​​​​​​火​​​​​​​墙​​​​​​​标​​​​​​​记​​​​​​​”.
Persistence Network Mask
要​​​​​​​把​​​​​​​持​​​​​​​久​​​​​​​性​​​​​​​限​​​​​​​制​​​​​​​到​​​​​​​特​​​​​​​定​​​​​​​的​​​​​​​子​​​​​​​网​​​​​​​，您​​​​​​​可​​​​​​​以​​​​​​​从​​​​​​​下​​​​​​​拉​​​​​​​菜​​​​​​​单​​​​​​​里​​​​​​​选​​​​​​​择​​​​​​​合​​​​​​​适​​​​​​​的​​​​​​​网​​​​​​​络​​​​​​​掩​​​​​​​码​​​​​​​。​​​​​​​

注意

在​​​​​​​出​​​​​​​现​​​​​​​防​​​​​​​火​​​​​​​墙​​​​​​​标​​​​​​​记​​​​​​​之​​​​​​​前​​​​​​​，由​​​​​​​子​​​​​​​网​​​​​​​限​​​​​​​制​​​​​​​的​​​​​​​持​​​​​​​久​​​​​​​性​​​​​​​是​​​​​​​捆​​​​​​​绑​​​​​​​连​​​​​​​接​​​​​​​的​​​​​​​原​​​​​​​始​​​​​​​方​​​​​​​法​​​​​​​。​​​​​​​现​​​​​​​在​​​​​​​，最​​​​​​​好​​​​​​​在​​​​​​​和​​​​​​​防​​​​​​​火​​​​​​​墙​​​​​​​标​​​​​​​记​​​​​​​的​​​​​​​关​​​​​​​联​​​​​​​中​​​​​​​使​​​​​​​用​​​​​​​持​​​​​​​久​​​​​​​性​​​​​​​来​​​​​​​达​​​​​​​到​​​​​​​同​​​​​​​样​​​​​​​的​​​​​​​结​​​​​​​果​​​​​​​。​​​​​​​

警告

请​​​​​​​记​​​​​​​住​​​​​​​在​​​​​​​此​​​​​​​面​​​​​​​板​​​​​​​中​​​​​​​进​​​​​​​行​​​​​​​任​​​​​​​何​​​​​​​修​​​​​​​改​​​​​​​后​​​​​​​点​​​​​​​击​​​​​​​「​​​​​​​接​​​​​​​受​​​​​​​」​​​​​​​按​​​​​​​钮​​​​​​​以​​​​​​​确​​​​​​​定​​​​​​​在​​​​​​​选​​​​​​​择​​​​​​​一​​​​​​​个​​​​​​​新​​​​​​​面​​​​​​​板​​​​​​​时​​​​​​​没​​​​​​​有​​​​​​​丢​​​​​​​失​​​​​​​所​​​​​​​做​​​​​​​的​​​​​​​修​​​​​​​改​​​​​​​。​​​​​​​