虚拟化平台cloudstack（8）——从UI开始
UIucloudstack采用的是前后端分离的架构，就是说前端可以选择使用web、swing甚至其它的界面，都可以。
我们来看cloudstack的UI信息吧，所有的cloudstack的UI都在{cloudstack_home}/cloudstack/ui目录下。
用firefox打开工程，打开firebug，找到login.js，在100行加上断点。
执行登录，这时就会触发断点，让我们看看发生了什么：
最终是使用jquery的ajax来提交post请求给服务器端，也就是说，manager server提供给我们的是一组API，我们可以通过http的请求方式提交请求。
处理http请求
看完了前端，我们继续看一下后端处理。
在web.xml中，我们看到所有的api/请求都会到ApiServlet中处理。
apiServlet
com.cloud.api.ApiServlet
5
apiServlet
/api/*
在ApiServlet中，重点看下
@Override
public void init(ServletConfig config) throws ServletException {
SpringBeanAutowiringSupport.processInjectionBasedOnServletContext(this, config.getServletContext());
}
这样在web容器中就可以查看spring中使用注解的接口了。
说实话这块感觉设计的挺一般的，一个servlet里边承担了太多的任务，我打了个断点在
processRequest(req, resp);
这个方法中，但是一个登录的操作就走了四次断点，一个退出操作又走了两次，不清楚这块为什么这样设计。
而且很多业务代码都在这个类中操作，感觉很冗余。但这个不是我们重点关心的问题。
CloudStack API提供的三种角色
[*]管?理?员?。?获?得?云?的?所?有?功?能?，包?括?虚?拟?和?物?理?资?源?管?理?。?
[*]域?管?理?员?。?进?入?到?虚?拟?资?源?的?云?属?于?管?理?员?的?域?。
[*]用?户?。?只?访?问?允?许?用?户?管?理?的?功?能?，虚?拟?实?例?，存?储?，和?网?络?。?
API文档的地址
http://cloudstack.apache.org/docs/api/
可以看到不同角色的API的地址，进去之后，可以看到每个API的详细描述。
处理简单列举一下4.1中API的新特性
在VM中重新配置物理网络
支持IPV6
扩展VMX设置
重新设置SSH密钥来访问虚拟机
在4.1中改变的API命令：
API Commands
Description
createNetworkOffering
The following request parameters have been added:
[*]
isPersistent
[*]
startipv6
[*]
endipv6
[*]
ip6gateway
[*]
ip6cidr
listNetworkOfferings
listNetworks
The following request parameters have been added:
[*]
isPersistent
This parameter determines if the network or network offering listed are persistent or not.
[*]
ip6gateway
[*]
ip6cidr
createVlanIpRange
The following request parameters have been added:
[*]
startipv6
[*]
endipv6
[*]
ip6gateway
[*]
ip6cidr
deployVirtualMachine
The following parameter has been added: ip6Address.
The following parameter is updated to accept the IPv6 address: iptonetworklist.
CreateZoneCmd
The following parameter have been added: ip6dns1, ip6dns2.
listRouters
listVirtualMachines
For nic responses, the following fields have been added.
[*]
ip6address
[*]
ip6gateway
[*]
ip6cidr
listVlanIpRanges
For nic responses, the following fields have been added.
[*]
startipv6
[*]
endipv6
[*]
ip6gateway
[*]
ip6cidr
listRouters
listZones
For DomainRouter and DataCenter response, the following fields have been added.
[*]
ip6dns1
[*]
ip6dns2
addF5LoadBalancer
configureNetscalerLoadBalancer
addNetscalerLoadBalancer
listF5LoadBalancers
configureF5LoadBalancer
listNetscalerLoadBalancers
The following response parameter is removed: inline.
listFirewallRules
createFirewallRule
The following request parameter is added: traffictype (optional).
listUsageRecords
The following response parameter is added: virtualsize.
deleteIso
The following request parameter is added: forced (optional).
createStoragePool
The following request parameters are made mandatory:
[*]
podid
[*]
clusterid
createAccount
The following new request parameters are added: accountid, userid
createUser
The following new request parameter is added: userid
createDomain
The following new request parameter is added: domainid
listZones
The following request parameters is added: securitygroupenabled
同时添加了一些新的API
[*]
createEgressFirewallRules (creates an egress firewall rule on the guest network.)
[*]
deleteEgressFirewallRules (deletes a egress firewall rule on the guest network.)
[*]
listEgressFirewallRules (lists the egress firewall rules configured for a guest network.)
[*]
resetSSHKeyForVirtualMachine (Resets the SSHkey for virtual machine.)
[*]
addBaremetalHost (Adds a new host.)
[*]
addNicToVirtualMachine (Adds a new NIC to the specified VM on a selected network.)
[*]
removeNicFromVirtualMachine (Removes the specified NIC from a selected VM.)
[*]
updateDefaultNicForVirtualMachine (Updates the specified NIC to be the default one for a selected VM.)
[*]
addRegion (Registers a Region into another Region.)
[*]
updateRegion (Updates Region details: ID, Name, Endpoint, User API Key, and User Secret Key.)
[*]
removeRegion (Removes a Region from current Region.)
[*]
listRegions (List all the Regions. Filter them by using the ID or Name.)
[*]
getUser (This API can only be used by the Admin. Get user details by using the API Key.)
配置8096端口
8096端?口?, 不?需?要?验?证?即?可?进?行?API调?用?. 在?所?有?的?3.0.1版?本?全?新?安?装?时?, 这?个?端?口?都?是?默?认?被?禁?用?的?. 你?可?以?通?过?下?面?的?设?置?启?用?8096(或?使?用?其?它?端?口?号?):
[*]
确?保?第?一?个?管?理?服?务?器?安?装?并?运?行?.
[*]
设?置?你?期?望?的?端?口?号?到?全?局?配?置?参?数? integration.api.port.
[*]
重?启?管?理?服?务?器?.
[*]
在?管?理?服?务?器?的?节?点?上?, 创?建?一?个?防?火?墙?规?则?以?便?允?许?访?问?这?个?端?口?.
使用API请求
所?有?CloudStack API请?求?都?是?以?HTTP GET/POST形?式?提?交?, 同?时?附?上?相?关?的?命?令?和?参?数?. 无?论?是?HTTP或?HTTPS, 一?个?请?求?都?有?以?下?内?容?组?成?:
[*]
CloudStack API URL: 这?是?Web服?务?API入?口?(例?如?, http://www.cloud.com:8080/client/api)
[*]
命?令?: 你?想?要?执?行?的?Web服?务?命?令?, 比?如?开?启?一?个?虚?拟?机?或?创?建?一?个?磁?盘?卷?
[*]
参?数?: 命?令?所?需?的?任?何?必?要?或?可?选?的?参?数?
一?个?API GET请?求?的?样?例?看?起?来?像?这?样?:
http://localhost:8080/client/api?command=deployVirtualMachine&serviceOfferingId=1&diskOfferingId=1&templateId=2&zoneId=4&apiKey=miVr6X7u6bN_sdahOBpjNejPgEsT35eXq-jB8CG20YI3yaxXcgpyuaIRmFI_EJTVwZ0nUkkJbPmY3y2bciKwFQ&signature=Lxx1DM40AjcXU%2FcaiK8RAP0O1hU%3D
更容易读的方式：
http://localhost:8080/client/api
?command=deployVirtualMachine
&serviceOfferingId=1
&diskOfferingId=1
&templateId=2
&zoneId=4 &apiKey=miVr6X7u6bN_sdahOBpjNejPgEsT35eXqjB8CG20YI3yaxXcgpyuaIRmFI_EJTVwZ0nUkkJbPmY3y2bciKwFQ
&signature=Lxx1DM40AjcXU%2FcaiK8RAP0O1hU%3D
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