/// <remarks>
/// Returning bool instead of void since we want to not 'throw' from this method to preserve exception stack info.
/// </remarks>
private bool HandleCoordinatorException(Exception ex, DateTimeOffset lastSuccessfulRunAt)
{
if (ex is ManagementChannelTerminallyUnhealthyException)
{
return(false);
}
var warningThreshold =
TimeSpan.FromSeconds(configSection.ReadConfigValue(Constants.ConfigKeys.CoordinatorFailureWarningThreshold, 120));
var maxRetryDuration =
TimeSpan.FromSeconds(configSection.ReadConfigValue(Constants.ConfigKeys.CoordinatorFailureRetryDuration, 900));
var now = DateTimeOffset.UtcNow;
var elapsed = now - lastSuccessfulRunAt;
if (elapsed > maxRetryDuration)
{
var message =
"Not retrying further since 'CoordinatorFailureRetryDuration' of {0} has been exceeded".ToString(maxRetryDuration);
traceType.WriteError("Error while processing policy agent document. {0}. Exception: {1}", message, ex);
return(false);
}
string warningText = null;
if (elapsed > warningThreshold)
{
UpdateCoordinatorHealthStatus(
HealthState.Warning,
"Azure coordinator encountered errors. Last successful run was at: {0:O}. Last error: {1}"
.ToString(lastSuccessfulRunAt, ex));
warningText =
"Health warning reported since 'CoordinatorFailureWarningThreshold' of {0} has exceeded. ".ToString(
warningThreshold);
}
traceType.WriteWarning(
"Error while processing policy agent document. Last successful run was at: {0:O}. {1}Retrying until 'CoordinatorFailureRetryDuration' of {2} is exceeded. Exception: {3}",
lastSuccessfulRunAt, warningText, maxRetryDuration, ex);
return(true);
}
private static bool DoesJobRequireHealthCheck(ITenantJob tenantJob, IConfigSection configSection, string keyFormat, bool defaultValue)
{
tenantJob.Validate("tenantJob");
configSection.Validate("configSection");
var impactAction = tenantJob.GetImpactAction();
var key = keyFormat.ToString(impactAction);
return(configSection.ReadConfigValue(key, defaultValue));
}
private TimeSpan GetValidityTimeInterval()
{
var validityTimeInterval = configSection.ReadConfigValue(ConfigLearningModeValidityTimeSpanKeyName, DefaultLearningModeValidityTimeSpan);
if (validityTimeInterval <= TimeSpan.Zero)
{
validityTimeInterval = DefaultLearningModeValidityTimeSpan;
}
return(validityTimeInterval);
}
private T ReadFactoryConfig <T>(
IConfigSection configSection,
string keyName,
T defaultValue = default(T))
{
if (this.configUpdateHandler != null)
{
this.configUpdateHandler.RegisterKey(configSection.Name, keyName);
}
return(configSection.ReadConfigValue(keyName, defaultValue));
}
private void BuildRepairActionMap()
{
// if users specify a generic command. E.g. Reboot, then apply the config setting policy and determine
// whether to apply it on the VM or on the Host
RepairActionTypeEnum reboot = configSection.ReadConfigValue(Constants.ConfigKeys.RebootMaintenanceAction, RepairActionTypeEnum.Reboot);
RepairActionTypeEnum repaveData = configSection.ReadConfigValue(Constants.ConfigKeys.FullReimageMaintenanceAction, RepairActionTypeEnum.RepaveData);
AddRepairAction(reboot, AbstractRebootMaintenanceAction);
AddRepairAction(repaveData, AbstractFullReimageMaintenanceAction);
// There is no Host/VM target for ReimageOS currently. It is just applicable to VMs
AddRepairAction(RepairActionTypeEnum.ReimageOS);
// if users specify the command explicitly. E.g. System.Azure.Reboot, then apply the foll. irrespective of the
// *MaintenanceAction config setting
// Note: Unlike ReimageOS above, we haven't added a generic 'Heal' action. Instead users have to specify this explicitly
AddRepairActionWithNamespace(RepairActionTypeEnum.Reboot);
AddRepairActionWithNamespace(RepairActionTypeEnum.ReimageOS);
AddRepairActionWithNamespace(RepairActionTypeEnum.RepaveData);
AddRepairActionWithNamespace(RepairActionTypeEnum.HostReboot);
AddRepairActionWithNamespace(RepairActionTypeEnum.HostRepaveData);
AddRepairActionWithNamespace(RepairActionTypeEnum.Heal);
}
public static string GetTenantId(IConfigSection configSection)
{
configSection.Validate("configSection");
string tenantId = configSection.ReadConfigValue <string>("WindowsAzure.TenantID");
if (string.IsNullOrWhiteSpace(tenantId))
{
#if DotNetCoreClrLinux
tenantId = GetTenantIdOnLinux();
#else
tenantId = GetTenantIdOnWindows();
#endif
}
return(tenantId);
}
private Uri GetMRZeroSdkUri(IConfigSection configSection)
{
try
{
string uriString = configSection.ReadConfigValue <string>(Constants.ConfigKeys.MRZeroSdkUri);
Uri uri = string.IsNullOrWhiteSpace(uriString)
? GetUriFromRegistry()
: new Uri(uriString, UriKind.Absolute);
// using original string since a regular ToString() will not display the port no. which can be confusing while looking up traces
traceType.WriteInfo("Tenant policy agent endpoint: {0}", uri.OriginalString);
return(uri);
}
catch (Exception ex)
{
traceWriteConditionalWarning("Error while getting tenant policy agent endpoint. Exception: {0}", ex);
throw;
}
}
public string GetConfigValue(string key)
{
string configValue = configSection.ReadConfigValue <string>(key);
string value;
if (string.IsNullOrEmpty(configValue))
{
value = defaultConfigKeys[key];
Trace.WriteNoise(
RoleInstanceHealthConstants.TraceType,
"Config key '{0}' not defined in config store in watchdog health config policy '{1}'. Using default value of '{2}'",
key,
Name,
value);
}
else
{
value = configValue;
}
return(value);
}
/// <summary>
/// Gets the polling interval.
/// </summary>
/// <param name="keyName">Name of the key.</param>
/// <param name="defaultValue">The default value in seconds.</param>
/// <returns>The polling interval.</returns>
private TimeSpan GetPollingInterval(string keyName, int defaultValue)
{
return(TimeSpan.FromSeconds(configSection.ReadConfigValue(keyName, defaultValue)));
}
private int GetMaxCountFromConfig(ImpactActionEnum jobType)
{
return(configSection.ReadConfigValue(
Constants.ConfigKeys.MaxParallelJobCountKeyPrefix + jobType,
DefaultMaxParallelJobCountPerImpactAction));
}
// TODO, ensure stability
// i.e. on re-execution, the same things should re-execute (if the state hasn't changed)
public override Task ApplyAsync(Guid activityId, CoordinatorContext coordinatorContext)
{
coordinatorContext.Validate("coordinatorContext");
if (coordinatorContext.MappedTenantJobs.Count == 0)
{
return(Task.FromResult(0));
}
var allJobs = coordinatorContext.MappedTenantJobs.Values;
var activeJobs = allJobs.Where(j => j.IsActive).ToList();
// Count all active jobs
int totalActiveJobCount = activeJobs.Count;
// Count active jobs by type
int activeUpdateJobCount = 0;
JobTypeCounter jobTypeCounter = new JobTypeCounter(this.configSection);
foreach (var job in activeJobs)
{
traceType.WriteInfo("Active job {0} ({1})", job.Id, job.TenantJob.GetImpactAction());
jobTypeCounter.AddActiveJob(job.TenantJob);
if (job.TenantJob.IsUpdateJobType())
{
++activeUpdateJobCount;
}
}
int maxParallelJobCount = configSection.ReadConfigValue(
Constants.ConfigKeys.MaxParallelJobCountTotal,
DefaultMaxParallelJobCountTotal);
int maxParallelUpdateJobCount = configSection.ReadConfigValue(
Constants.ConfigKeys.MaxParallelJobCountUpdate,
DefaultMaxParallelJobCountUpdate);
traceType.WriteInfo(
"Active/max job counts: Total: {0}/{1}, Updates: {2}/{3}, {4}",
totalActiveJobCount,
maxParallelJobCount,
activeUpdateJobCount,
maxParallelUpdateJobCount,
jobTypeCounter);
// Find all jobs that are waiting to prepare
var pendingJobs = allJobs
.Where(j => !j.IsActive && ((j.AllowedActions & ActionType.Prepare) == ActionType.Prepare))
.OrderBy(j => j.TenantJob.GetImpactAction()) // Apply default static priority based on job type
.ToList();
// TODO, ensure that we don't ack too many in the 2nd pass just after acking once
// choose the simplest logic for now. In future, we will pick based on oldest document incarnation number etc.
foreach (var pendingJob in pendingJobs)
{
// Fall through the checks, so that all blocking reasons are logged
bool allowJob = true;
if (totalActiveJobCount >= maxParallelJobCount)
{
traceType.WriteInfo(
"Not starting job {0} because it would exceed max total parallel job count ({1}/{2})",
pendingJob.Id,
totalActiveJobCount,
maxParallelJobCount);
allowJob = false;
}
JobCount count;
if (!jobTypeCounter.CanAddActiveJob(pendingJob.TenantJob, out count))
{
traceType.WriteInfo(
"Not starting job {0} because it would exceed max parallel job count for type {1} ({2})",
pendingJob.Id,
pendingJob.TenantJob.GetImpactAction(),
count);
allowJob = false;
}
if (pendingJob.TenantJob.IsUpdateJobType() && (activeUpdateJobCount >= maxParallelUpdateJobCount))
{
traceType.WriteInfo(
"Not starting job {0} because it would exceed max parallel update job count ({1}/{2})",
pendingJob.Id,
activeUpdateJobCount,
maxParallelUpdateJobCount);
allowJob = false;
}
if (allowJob)
{
++totalActiveJobCount;
jobTypeCounter.AddActiveJob(pendingJob.TenantJob);
if (pendingJob.TenantJob.IsUpdateJobType())
{
++activeUpdateJobCount;
}
traceType.WriteInfo("Allowing job {0} to start", pendingJob.Id);
}
else
{
pendingJob.DenyActions(traceType, ActionType.Prepare);
}
}
return(Task.FromResult(0));
}