Page History

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• At regular intervals, update.check.interval, management server will look for all available updates for a Hypervisior. For Xenserver, it'll downloads the latest update information from http://updates.xensource.com/XenServer/updates.xml. The location is configurable through xen.update.url in global configuration.
  1. Search the released patches for applicable XenServer version.
  2. Fetch the information about the already applied patches from the agent.
  3. Compare the list of available patches with the list of already applied patches.
  4. Prepare a list of patches that are not yet applied.
  5. Fill/update the patch details into host_updates table.
  6. Make a corresponding entry into patchhost_hostupdates_ref table.

Admin can change the time interval to check the updates by changing the value of update.check.interval global config parameter(by default interval is set to check for updates once a week).

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• host_updates (id, uuid, label, description, label, url, timestamp) :  This table contains the details about the patches for different XenServers versions.

  Field	Type	NULL	Key	Default	Extra
  id	bigint(20) unsigned	NO	PRI	NULL	auto_increment
  uuid	varchar(40)	NO		NULL
  description	varchar(999)	YES		NULL
  label	varchar(40)	YES		NULL
  timestamp	timestamp	YES		NULL
  url	varchar(999)	YES		NULL

• patchhost_hostupdates_ref (id, host_id,patch_id, update_applied) : This table maps the hosts from host table with the applicable patches from host_updates table.

  Field	Type	NULL	Key	Default	Extra
  id	bigint(20) unsigned	NO	PRI	NULL	auto_increment
  host_id	bigint(20) unsigned	NO	MUL	NULL
  patch_id	bigint(20) unsigned	NO		NULL
  update_applied	tinyint(1)	NO		0

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• HostUpdatesDao.java
• HostUpdatesDaoImpl.java
• HostUpdatesVO.java
• PatchHostRefDaoHostUpdatesRefDao.java
• PatchHostRefDaoImplHostUpdatesRefDaoImpl.java
• PatchHostVOHostUpdatesRefVO.java

New managers interfaces and implementation:

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Changes to Existing Files:

• Added Add a new method "searchForHostUpdates" in ManagementService.java and implemented in ManagementServerImpl.java
• Added Add a new method* in CitrixResourceBase.java to get the information about the applied patches to a host using XAPI *calls.
• Added Add a call in ResourceManagerImpl.java to delete the update entries from patch_host_ref table only if admin removes the associated host.
• Added Add new call createHostUpdateResponse in interface ResponseGenerator.java *and implemented it in *ApiResponseHelper.java .Added new files HostUpdatesDaoImpl.java and PatchHostRefDaoImpl.java into DefaultComponentLibrary.java 
• Add a new component HostUpdatesManager.

New Agent APIs:

• hostUpdatesCommand.java
• hostUpdatesAnswer.java

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