cloudstack主机添加不成功
CloudStack正常启动，添加区域、提供点和群集都正常，但是添加主机时提示添加不成功。
先添加主机：
然后出现提示：
在网上找了一圈，基本上没什么回复，没办法，还得自己搞。
查看日志
进入/var/log/cloud/managerment，看管理服务器的日志：
tail -f management-server.log
查看日志发现出现异常信息：
2013-06-27 09:07:19,659 INFO [cloud.resource.ResourceManagerImpl] (catalina-exec-17:null) Trying to add a new host at http://192.168.74.143 in data center 3
2013-06-27 09:07:19,664 WARN [kvm.discoverer.KvmServerDiscoverer] (catalina-exec-17:null) can't setup agent, due to java.io.IOException: There was a problem while connecting to 192.168.74.143:22 - There was a problem while connecting to 192.168.74.143:22
2013-06-27 09:07:19,664 WARN [cloud.resource.ResourceManagerImpl] (catalina-exec-17:null) Unable to find the server resources at http://192.168.74.143
2013-06-27 09:07:19,664 WARN [api.commands.AddHostCmd] (catalina-exec-17:null) Exception:
com.cloud.exception.DiscoveryException: Unable to add the host
at com.cloud.resource.ResourceManagerImpl.discoverHostsFull(ResourceManagerImpl.java:737)
at com.cloud.resource.ResourceManagerImpl.discoverHosts(ResourceManagerImpl.java:544)
at com.cloud.api.commands.AddHostCmd.execute(AddHostCmd.java:140)
at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:138)
at com.cloud.api.ApiServer.queueCommand(ApiServer.java:544)
at com.cloud.api.ApiServer.handleRequest(ApiServer.java:423)
at com.cloud.api.ApiServlet.processRequest(ApiServlet.java:312)
at com.cloud.api.ApiServlet.doGet(ApiServlet.java:64)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:615)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11NioProcessor.process(Http11NioProcessor.java:889)
at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:744)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:2282)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:679)
2013-06-27 09:07:19,666 WARN [cloud.api.ApiDispatcher] (catalina-exec-17:null) class com.cloud.api.ServerApiException : Unable to add the host
查看VT是否打开
因为没打开VT，所以导致不能添加Host的异常，打开VT后，再次添加，添加成功！
cloudstack当修改mysql的bind_address时导致连接不成功
修改参数后导致tomcat不能启动，查看日志，得到如下信息：
-- ::, WARN [cluster.dao.ManagementServerHostDaoImpl] (Cluster-Heartbeat-:null) Unexpected exception,
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was milliseconds ago. The last packet sent successfully to the server was milliseconds ago.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:)
at java.lang.reflect.Constructor.newInstance(Constructor.java:)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:)
在网上查了一些资料：
修改MySQL的参数了，wait_timeout最大为31536000即1年，在my.cnf中加入：
[mysqld]
wait_timeout=
interactive_timeout=
重启生效，需要同时修改这两个参数。
还是不行，于是
注释掉这行，如：#bind-address = 127.0.0.1
或者改为： bind-address = 0.0.0.0
允许任意IP访问；
如果指定ip，那么不知道为什么本机就不能访问，会导致一些异常，所以我修改为任意IP都可以访问，再重新授权。
grant all privileges on *.* to root@"%" identified by "password" with grant option; flush privileges;
重启mysql
sudo /etc/init.d/mysql restart
然后重新启动
sudo /etc/init.d/cloud-management restart
一切正常。
cloudstack注册ISO时提示connection refused
当注册模板的时候，配置好apache，并且在本地测试可以下载。
但是上传模板的时候还是提示拒绝连接：
进入Cloudstack的管理界面进行全局配置
搜索secstorage关键字，找到一个叫做“secstorage.allowed.internal.sites”的配置参数，设置为 可访问的IP如（192.168.1.1/24），敲回车确认即可。这个参数是说，Web服务器的网段在192.168.1.*；然后到管理节点的命令行重启服务： # service cloud-management restart
重新登陆界面，在此添加ISO模版，就不会出现“connection refused”的错误。