尽管处理了 RoleEnvironment.Changing 事件并将 Cancel 设置为 false，但 Azure Webroles 在配置更改后仍会回收

Question

当更改 webrole 的某些配置设置时，会触发 RoleEnvironment.Changing 事件。据我了解，如果在 RoleEnvironmentChangingEventArgs 中 Cancel 设置为 false，则角色不应回收，并且更改将被接受，并且应在 RoleEnvironment.Changed 事件触发后立即应用。

但是，尽管将 Cancel 设置为 false，我们的角色仍在循环。

这是事件处理程序的内容:

public static void onRoleEnvironmentChanging(object sender, 
RoleEnvironmentChangingEventArgs e)
{
    try
    {
        List<RoleEnvironmentConfigurationSettingChange> configurationChanges = e.Changes.OfType<RoleEnvironmentConfigurationSettingChange>().ToList();
        e.Cancel = configurationChanges.Any(c => (c.ConfigurationSettingName == "settingThatShouldRecycleRole")))
    }
    catch (Exception)
    {
        e.Cancel = false;
    }
}

为了确定起见，我在这里添加了 try catch，但据我所知，它从未被触发过。

触发 e.Cancel = true 的设置未更改。我已记录此事件处理程序的最终结果，并且即使 e.Cancel 设置为 false，角色也会回收。

遗憾的是，检查角色日志并未找到回收的原因。

根据这篇旧博客文章，如果事件没有及时响应，事情可能会出错:https://alexandrebrisebois.wordpress.com/2013/09/29/handling-cloud-service-role-configuration-changes-in-windows-azure/

但是，我无法想象这段代码需要很长时间才能执行。测量它大约需要 150 毫秒，这相当慢，但这包括将计时记录到表存储的代码。据我所知，处理事件对时间敏感的说法也没有在其他任何地方记录下来。

编辑:WaHostBootstrapper.log相关内容

12:27:26.254, INFO ] Getting status from client WaIISHost.exe (2728).
12:27:26.254, INFO ] Client reported status 0.
12:27:26.254, INFO ] Getting status from client w3wp.exe (3424).
12:27:26.254, INFO ] Client reported status 0.
12:27:30.183, INFO ] Sending update notification to client WaIISHost.exe (2728).
12:27:30.183, INFO ] Sending update notification to client w3wp.exe (3424).
12:27:30.261, INFO ] Sending update completion notification to client WaIISHost.exe (2728).
12:27:30.293, INFO ] Sending update completion notification to client w3wp.exe (3424).
12:27:41.271, INFO ] Getting status from client WaIISHost.exe (2728).
12:27:41.271, INFO ] Client reported status 0.
12:27:41.271, INFO ] Getting status from client w3wp.exe (3424).
12:27:41.271, ERROR] Failed to connect to client w3wp.exe (3424).
12:27:41.271, ERROR] <- CRuntimeClient::OnRoleStatusCallback(0x000000A1B6E0E3C0) =0x800706ba
12:27:41.271, INFO ] Removing disconnected client: w3wp.exe (3424).
12:27:56.279, INFO ] Getting status from client WaIISHost.exe (2728).
12:27:56.279, INFO ] Client reported status 0.
12:28:11.284, INFO ] Getting status from client WaIISHost.exe (2728).
12:28:11.284, INFO ] Client reported status 0.
12:28:26.296, INFO ] Getting status from client WaIISHost.exe (2728).
12:28:26.296, INFO ] Client reported status 0.
12:28:35.683, INFO ] Registering client with PID 2964.
12:28:35.683, INFO ] Client w3wp.exe (2964) registered.
12:28:41.464, INFO ] Getting status from client WaIISHost.exe (2728).
12:28:41.464, INFO ] Client reported status 0.
12:28:41.464, INFO ] Getting status from client w3wp.exe (2964).
12:28:41.480, INFO ] Client reported status 0.
12:28:56.499, INFO ] Getting status from client 

AppAgentRuntime.log的相关内容(经过部分编辑)

12:27:30.313, INFO ] The role can handle the config change without recycle.     
12:27:30.355, INFO ] Firewall configuration was not found for X.X.X.X. Creating new configuration for X.X.X.X
12:27:30.355, INFO ] Firewall configuration was not found for Y.Y.Y.Y. Creating new configuration for Y.Y.Y.Y
12:27:30.355, INFO ] Creating additional rule for Internal Endpoint.
12:27:30.355, INFO ] Creating additional rule for Internal Endpoint.
12:27:30.355, INFO ] Creating additional rule for Internal Endpoint.
12:27:30.355, INFO ] Setting firewall rule : -REDACTED-
12:27:30.355, INFO ] Firewall rule -REDACTED-
-Repeated 10+ times with different rule guids-
12:27:30.560, INFO ] Cleanup base filters for group NT SERVICE:
12:27:30.560, WARN ] BaseFilterRemoveStealthModeFilters not implemented     
12:27:30.560, INFO ] Add stealth-mode filters if requested for group NT SERVICE:
12:27:30.560, INFO ] Deleting firewall rules...     
12:27:31.011, INFO ] Deleted 14 rules. hr: 0x0      
12:27:31.011, WARN ] BaseFilterRemoveStealthModeFilters not implemented     
12:27:31.011, INFO ] Deleting URLACL : Url = http://X.X.X.X:XXX/        
12:27:31.011, WARN ] Warning: Unable to delete URLACL : URL = http://X.X.X.X:XXX/. Error code - 0x2
12:27:31.011, INFO ] Deleting URLACL : Url = https://X.X.X.X:XXX/
12:27:31.011, INFO ] Successfully created URLACL : URL = https://X.X.X.X:XXX/, SDDL = D:(A;;GX;;;S-1-5-20).
12:27:31.011, INFO ] AgentpUpdateConfigWorker Returning
    00000000.
12:27:31.011, INFO ] <<<<_Context_Ends: {-REDACTED-}    Return value = 00000000. 
12:27:31.011, WARN ] <- AgentMonitoringObject::EventEnd(0x00007FFF616577E0) =0x80070015
12:27:31.011, INFO ] <<<<_Context_Ends: {-REDACTED-}    Return value = 00000000. 

这对我来说看起来很可疑，为什么它要更新一堆防火墙规则？

WaAppAgent.log 的内容:

12:27:23.86] [HEART] WindowsAzureGuestAgent Heartbeat.
12:27:23.86] [INFO]  Role current state: Started.
12:27:23.86] [INFO]  Recieved goal state information.
12:27:23.86] [INFO]  Execution status: UpdateSucceeded.
12:27:23.86] [INFO]  Role -REDACTED- is reporting state Ready.
12:27:24.32] [INFO]  Role -REDACTED- has current state Started, desired state Started, and goal state execution status UpdateSucceeded.
12:27:28.87] [HEART] WindowsAzureGuestAgent Heartbeat.
12:27:28.87] [INFO]  Role current state: Started.
12:27:28.87] [INFO]  Recieved goal state information.
12:27:28.87] [INFO]  Execution status: UpdateSucceeded.
12:27:28.87] [INFO]  Role -REDACTED- is reporting state Ready.
12:27:28.87] [INFO]  Goal state 43 received.
12:27:28.87] [INFO]  Received stop role deadline hint: 300000. ExpectedState: Started
12:27:28.87] [INFO]  Goal state being updated.
12:27:28.87] [INFO]  Deleting all user accounts.
12:27:28.87] [INFO]  Role -REDACTED- is being updated.
12:27:28.87] [INFO]  Role -REDACTED- has goal state Started.
12:27:28.87] [INFO]  Extension Plugins Found.
12:27:28.95] [INFO]  Goal state execution started for role -REDACTED-.
12:27:28.95] [INFO]  Driving role -REDACTED- to goal state Started from current state Started.
12:27:29.98] [INFO]  Found role root. roleId:  tagFileName:  tagPatternUsed: *.tag root: E:\
12:27:29.98] [INFO]  Acled the directory E:\base.
12:27:29.98] [INFO]  Acled the directory E:\base\x64.
12:27:29.98] [INFO]  Acled the directory E:\base\x86.
12:27:29.98] [INFO]  Acled the directory D:\Packages.
12:27:29.98] [INFO]  Acled the directory D:\Packages\GuestAgent.
12:27:29.98] [INFO]  Acled the directory D:\Packages\GuestAgent\GuestAgent.
12:27:29.98] [INFO]  Acled the directory D:\Packages\GuestAgent\GuestAgent\LegacyRuntime.
12:27:29.98] [INFO]  Acled the directory D:\Packages\GuestAgent\GuestAgent\LegacyRuntime\x64.
12:27:29.98] [INFO]  Acled the directory D:\Packages\GuestAgent\GuestAgent\LegacyRuntime\x86.
12:27:29.98] [INFO]  Acled the directory D:\Packages\GuestAgent\Telemetry.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0\Monitor.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0\Monitor\x64.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0\Monitor\x64\Extensions.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0\Monitor\x64\Extensions\ApplicationInsightsExtension.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0\Monitor\x64\Extensions\ApplicationInsightsExtension\Resources.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0\Monitor\x64\schema.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0\Monitor\x64\schema\1.0.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0\Monitor\x64\schema\2.0.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0\RuntimeSettings.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0\schema.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0\Status.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0\StatusMonitor.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Windows.Azure.Extensions.RDP.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Windows.Azure.Extensions.RDP\1.2.1.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Windows.Azure.Extensions.RDP\1.2.1\RuntimeSettings.
12:27:29.98] [INFO]  Acled the directory D:\Packages\Plugins\Microsoft.Windows.Azure.Extensions.RDP\1.2.1\Status.
12:27:30.08] [INFO]  Found role root. roleId: -REDACTED-
12:27:30.08] [INFO]  Sending new config file: -REDACTED-.
12:27:30.08] [INFO]  Starting installation of plugins. Incarnation: 43 Plugin size: 2
12:27:30.08] [INFO]  Downloading version manifest for plugin Microsoft.Azure.Diagnostics.PaaSDiagnostics from -REDACTED-
12:27:30.13] [INFO]  Getting plugin locations for plugin 'Microsoft.Azure.Diagnostics.PaaSDiagnostics'. Current Version: '1.8.1.0', Requested Version: '1.8.1.0'
12:27:30.13] [INFO]  Auto-Upgrade mode. Highest public version for plugin 'Microsoft.Azure.Diagnostics.PaaSDiagnostics' with requested version: '1.8.1.0', is: '1.8.1.0'
12:27:30.13] [INFO]  Updating plugin 'Microsoft.Azure.Diagnostics.PaaSDiagnostics' to version '1.8.1.0'
12:27:30.14] [INFO]  No plugin settings received. Setting nothing for plugin: Microsoft.Azure.Diagnostics.PaaSDiagnostics version: 1.8.1.0
12:27:30.14] [INFO]  Downloading version manifest for plugin Microsoft.Windows.Azure.Extensions.RDP from -REDACTED-
12:27:30.15] [INFO]  Getting plugin locations for plugin 'Microsoft.Windows.Azure.Extensions.RDP'. Current Version: '1.2.1', Requested Version: '1.2.1'
12:27:30.15] [INFO]  Auto-Upgrade mode. Highest public version for plugin 'Microsoft.Windows.Azure.Extensions.RDP' with requested version: '1.2.1', is: '1.2.1'
12:27:30.15] [INFO]  Updating plugin 'Microsoft.Windows.Azure.Extensions.RDP' to version '1.2.1'
12:27:30.15] [INFO]  No plugin settings received. Setting nothing for plugin: Microsoft.Windows.Azure.Extensions.RDP version: 1.2.1
12:27:30.15] [INFO]  Processing plugin Microsoft.Windows.Azure.Extensions.RDP version 1.2.1, state: enabled, autoupgrade: True, isJson: False
12:27:30.15] [INFO]  Plug-in Microsoft.Windows.Azure.Extensions.RDP 1.2.1 found in cache.
12:27:30.15] [INFO]  Extracting plug-in zip file to folder. Zip file: D:\Packages\Plugins\Microsoft.Windows.Azure.Extensions.RDP\1.2.1\Microsoft.Windows.Azure.Extensions.RDP_1.2.1.zip
12:27:30.16] [INFO]  Xml manifest file D:\Packages\Plugins\Microsoft.Windows.Azure.Extensions.RDP\1.2.1\PluginManifest.xml found corresponding to the plugin Microsoft.Windows.Azure.Extensions.RDP
12:27:30.16] [INFO]  Install command of plugin Microsoft.Windows.Azure.Extensions.RDP: D:\Packages\Plugins\Microsoft.Windows.Azure.Extensions.RDP\1.2.1\RemoteAccessPluginLauncher.exe
12:27:30.16] [INFO]  Beginning installation of plugin Microsoft.Windows.Azure.Extensions.RDP 1.2.1.
12:27:30.16] [INFO]  Processing plugin Microsoft.Azure.Diagnostics.PaaSDiagnostics version 1.8.1.0, state: enabled, autoupgrade: True, isJson: False
12:27:30.16] [INFO]  Plug-in Microsoft.Azure.Diagnostics.PaaSDiagnostics 1.8.1.0 found in cache.
12:27:30.16] [INFO]  Extracting plug-in zip file to folder. Zip file: D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0\Microsoft.Azure.Diagnostics.PaaSDiagnostics_1.8.1.0.zip
12:27:30.21] [WARN]  Package extraction failed. D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0\Microsoft.Azure.Diagnostics.PaaSDiagnostics_1.8.1.0.zip D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0 HR = '0x8007026A' from PackageExpand, Code: 1005
12:27:30.21] [INFO]  Xml manifest file D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0\PluginManifest.xml found corresponding to the plugin Microsoft.Azure.Diagnostics.PaaSDiagnostics
12:27:30.21] [INFO]  Install command of plugin Microsoft.Azure.Diagnostics.PaaSDiagnostics: D:\Packages\Plugins\Microsoft.Azure.Diagnostics.PaaSDiagnostics\1.8.1.0\diagnosticspluginlauncher.exe
12:27:30.21] [INFO]  Beginning installation of plugin Microsoft.Azure.Diagnostics.PaaSDiagnostics 1.8.1.0.
12:27:30.26] [INFO]  Found role root. roleId: {-REDACTED-} tagFileName: -REDACTED-.cssx tagPatternUsed: -REDACTED-.cssx.tag root: E:\
12:27:30.26] [WARN]  Environment variable RoleRoot already exists with old value: E:\. Replacing it with new value: E:\
12:27:30.26] [INFO]  Waiting for command of plugin Microsoft.Windows.Azure.Extensions.RDP to finish...
12:27:30.40] [INFO]  Found role root. roleId: {-REDACTED-} tagFileName: -REDACTED-.cssx tagPatternUsed: -REDACTED-.cssx.tag root: E:\
12:27:30.40] [WARN]  Environment variable RoleRoot already exists with old value: E:\. Replacing it with new value: E:\
12:27:30.40] [INFO]  Waiting for command of plugin Microsoft.Azure.Diagnostics.PaaSDiagnostics to finish...
12:27:31.01] [INFO]  Role -REDACTED- was updated.
12:27:31.01] [INFO]  1 events queued for role -REDACTED-.
12:27:33.56] [INFO]  Successfully installed plugin Microsoft.Windows.Azure.Extensions.RDP 1.2.1.
12:27:33.56] [INFO]  Plugin enabled (name: Microsoft.Windows.Azure.Extensions.RDP, version: 1.2.1)., Code: 0
12:27:35.00] [HEART] WindowsAzureGuestAgent Heartbeat.
12:27:35.00] [INFO]  Role current state: Started.
12:27:35.00] [INFO]  Recieved goal state information.
12:27:35.00] [INFO]  Execution status: UpdateSucceeded.
12:27:35.00] [INFO]  Role -REDACTED- is reporting queued event [NotReady, Starting, Role was updated successfully. @05/26/2017 12:27:31.01].
12:27:35.00] [INFO]  Generating substatus from system events.
12:27:35.00] [INFO]  Substatus is Role was updated successfully. System is initializing. [2017-05-26T12:27:28Z]
12:27:35.00] [INFO]  Role -REDACTED- is reporting state NotReady with sub-status Starting and details Role was updated successfully. System is initializing. [2017-05-26T12:27:28Z].
12:27:36.02] [INFO]  Role -REDACTED- has current state Started, desired state Started, and goal state execution status UpdateSucceeded.
12:27:40.03] [HEART] WindowsAzureGuestAgent Heartbeat.
12:27:40.03] [INFO]  Role current state: Started.
12:27:40.03] [INFO]  Recieved goal state information.
12:27:40.03] [INFO]  Execution status: UpdateSucceeded.
12:27:40.03] [INFO]  Role -REDACTED- is reporting state Ready.
12:27:41.03] [INFO]  Role -REDACTED- has current state Started, desired state Started, and goal state execution status UpdateSucceeded.
12:27:45.05] [HEART] WindowsAzureGuestAgent Heartbeat.
12:27:45.05] [INFO]  Role current state: Started.
12:27:45.05] [INFO]  Recieved goal state information.
12:27:45.05] [INFO]  Execution status: UpdateSucceeded.
12:27:45.05] [INFO]  Role -REDACTED- is reporting state Ready.
12:27:46.07] [INFO]  Role -REDACTED- has current state Started, desired state Started, and goal state execution status UpdateSucceeded.

即使我没有对更改后的设置执行任何操作，它也会执行此操作:

RoleEnvironment.Changing += onRoleEnvironmentChanging;
RoleEnvironment.Changed += onRoleEnvironmentChanged;

public static void onRoleEnvironmentChanging(object sender, RoleEnvironmentChangingEventArgs e)
{
  e.Cancel = false;
}

private static void onRoleEnvironmentChanged(object sender, RoleEnvironmentChangedEventArgs e)
{
}

编辑2:已修复

禁用应用程序洞察解决了问题。

请参阅此问题以删除应用程序见解: Remove Application Insight from application on Visual Studio 2013 )

此外，我禁用了向 Application Insights 发送诊断数据:请参阅disable send diagnostics data to application insights on publish settings

最后，角色上启用了 Windows Azure 诊断扩展，该扩展还将诊断上传到 Application Insights。必须通过门户删除此扩展程序。

Answer 1

VM 上运行的任何挂接到服务运行时的进程都可以触发回收。检查 WaHostBootstrapper 日志以查看哪个进程导致回收。您可以从 https://blogs.msdn.microsoft.com/kwill/2013/08/09/windows-azure-paas-compute-diagnostics-data/ 开始，并特别关注那些谈论 WaHostBootstrapper 的内容。