PHP應用程序的服務器集羣發送請求與代碼錯誤賞析（zend server）

Zend Server提供企業級的Web應用服務器，特別是對PHP應用程序的支持很完美。Zend Server服務器的集羣管理方法有不少，下面介紹下服務器集羣鏈接的請求參數和錯誤代碼。

請求參數：

Parameter	Type	Required	Description
serverName	String	Yes	Server name
dbHost	String	Yes	Database host address to join the cluster
dbUsername	String	Yes	Database credentials (username)
dbPassword	String	Yes	Database credentials (password)
nodeIp	String	Yes	Server IP
dbName	String	Yes	Database name
failIfConnected	Boolean	No	Cause the action to completely fail if the server is already connected. Otherwise, a normal 200 status is returned without performing any action. Default: false

錯誤代碼：

HTTP Code	Error Code	Description
400	alreadyConnected	The server is already a member of a cluster (not necessarily the current cluster)
400	wrongPassword	Provided GUI password is incorrect
405	notImplementedByEdition	This method is only available on Professional or Enterprise editions
500	invalidServerResponse	Invalid or unexpected response from new server
500	serverNotLicensed	Zend Server is not licensed
500	noActiveServers	The server cannot be added because all servers in the cluster are disabled or unreachable
500	cantConnectToServer	Zend Server is unable to connect to the specified Server URL
503	temporarilyLocked	The server cannot be added because a cluster member is in graceful startup / shutdown mode