private void ReportMessage(HealthState healthState, string description)
{
HealthInformation healthInformation = new HealthInformation(this.entityIdentifier, "Connectivity", healthState);
healthInformation.Description = description;
DeployedServicePackageHealthReport healthReport = new DeployedServicePackageHealthReport(
this.applicatioName,
this.serviceManifestName,
this.nodeName,
healthInformation);
try
{
this.fabricClient.HealthManager.ReportHealth(healthReport);
}
catch (FabricException e)
{
// A stale report exception indicates a newer report was submitted for the same entity.
// Because we are reporting health for deployed service package, this can happen if multiple instances or replicas
// of the same service are deployed on the same cluster node. We could report on service instances/replicas instead,
// and that would make health reports unique, but would also significantly complicate EventFlow setup,
// so we just suppress the error instead.
if (e.ErrorCode != FabricErrorCode.FabricHealthStaleReport)
{
throw;
}
}
}
protected override async Task RunAsync(CancellationToken cancellationToken)
{
int failedCount = 0;
while (!cancellationToken.IsCancellationRequested)
{
using (WebClient client = new WebClient())
{
try
{
string payload = client.DownloadString(new Uri("http://localhost:8080/"));
if (!string.IsNullOrEmpty(payload))
{
if (payload == "something wrong")
{
failedCount++;
ServiceEventSource.Current.Write("Watchdog had detected " + failedCount + " failures.");
if (failedCount >= 5)
{
var deployedServicePackageHealthReport = new DeployedServicePackageHealthReport(
applicationName,
serviceManifestName,
nodeName,
new HealthInformation("CustomWatchDog", "MyServiceHealth", HealthState.Warning));
Client.HealthManager.ReportHealth(deployedServicePackageHealthReport);
ServiceEventSource.Current.Write("Watchdog is sad.");
}
}
else
{
failedCount = 0;
var deployedServicePackageHealthReport = new DeployedServicePackageHealthReport(
applicationName,
serviceManifestName,
nodeName,
new HealthInformation("CustomWatchDog", "MyServiceHealth", HealthState.Ok));
Client.HealthManager.ReportHealth(deployedServicePackageHealthReport);
ServiceEventSource.Current.Write("Watchdog is happy");
}
}
}
catch (WebException)
{
failedCount++;
ServiceEventSource.Current.Write("Watchdog had detected " + failedCount + " failures.");
if (failedCount >= 5)
{
var deployedServicePackageHealthReport = new DeployedServicePackageHealthReport(
applicationName,
serviceManifestName,
nodeName,
new HealthInformation("CustomWatchDog", "MyServiceHealth", HealthState.Warning));
Client.HealthManager.ReportHealth(deployedServicePackageHealthReport);
ServiceEventSource.Current.Write("Watchdog is sad.");
}
}
}
await Task.Delay(TimeSpan.FromSeconds(1), cancellationToken);
}
}
/// <summary>
/// Returns a health report
/// </summary>
/// <param name="context">The service fabric context that the health report is for</param>
/// <param name="reportSourceId">The unique reporting source id</param>
/// <param name="propertyName">The name of the health property being reported on</param>
/// <param name="state">The current state of the health property</param>
/// <param name="timeToLive">The time to live of the health report</param>
/// <param name="reportType">The entity type the report is for</param>
/// <returns>A health report for the appropriate reporting entity</returns>
public static HealthReport GetHealthReport(ServiceContext context, string reportSourceId, string propertyName, HealthState state, ReportTypes reportType, TimeSpan timeToLive)
{
HealthReport report;
var information = new HealthInformation(reportSourceId, propertyName, state);
information.Description = $"{ propertyName } health state { Enum.GetName(typeof(HealthState), state) }";
information.RemoveWhenExpired = true;
information.TimeToLive = timeToLive;
information.SequenceNumber = HealthInformation.AutoSequenceNumber;
switch (reportType)
{
case ReportTypes.Cluster:
report = new ClusterHealthReport(information);
break;
case ReportTypes.Application:
report = new ApplicationHealthReport(new Uri(context.CodePackageActivationContext.ApplicationName), information);
break;
case ReportTypes.DeployedApplication:
report = new DeployedApplicationHealthReport(new Uri(context.CodePackageActivationContext.ApplicationName), context.NodeContext.NodeName, information);
break;
case ReportTypes.Service:
report = new ServiceHealthReport(context.ServiceName, information);
break;
case ReportTypes.DeployedService:
report = new DeployedServicePackageHealthReport(new Uri(context.CodePackageActivationContext.ApplicationName), context.CodePackageActivationContext.GetServiceManifestName(), context.NodeContext.NodeName, information);
break;
case ReportTypes.Node:
report = new NodeHealthReport(context.NodeContext.NodeName, information);
break;
case ReportTypes.Instance:
if (context is StatelessServiceContext)
{
report = new StatelessServiceInstanceHealthReport(context.PartitionId, context.ReplicaOrInstanceId, information);
}
else
{
report = new StatefulServiceReplicaHealthReport(context.PartitionId, context.ReplicaOrInstanceId, information);
}
break;
default:
throw new ArgumentException("Unknown health type", nameof(reportType));
}
return(report);
}
private void ReportHealth(HealthState healthState, string problemDescription)
{
HealthInformation healthInformation = new HealthInformation(this.entityIdentifier, "Connectivity", healthState);
healthInformation.Description = problemDescription;
DeployedServicePackageHealthReport healthReport = new DeployedServicePackageHealthReport(
this.applicatioName,
this.serviceManifestName,
this.nodeName,
healthInformation);
this.fabricClient.HealthManager.ReportHealth(healthReport);
}
private void ReportHealth(HealthState healthState, string problemDescription)
{
HealthInformation healthInformation = new HealthInformation(this.entityIdentifier, "Connectivity", healthState);
healthInformation.Description = problemDescription;
DeployedServicePackageHealthReport healthReport = new DeployedServicePackageHealthReport(
this.applicatioName,
this.serviceManifestName,
this.nodeName,
healthInformation);
this.fabricClient.HealthManager.ReportHealth(healthReport);
}
//works only as admin
public static void SendReport(bool good, string component)
{
// Test whether the resource can be accessed from the node
HealthState healthState = good ? HealthState.Ok : HealthState.Warning;
// Send report on deployed service package, as the connectivity is needed by the specific service manifest
// and can be different on different nodes
var deployedServicePackageHealthReport = new DeployedServicePackageHealthReport(
ApplicationName,
ServiceManifestName,
NodeName,
new HealthInformation("SFPubSubAdmin", component, healthState));
// TODO: handle exception. Code omitted for snippet brevity.
// Possible exceptions: FabricException with error codes
// FabricHealthStaleReport (non-retryable, the report is already queued on the health client),
// FabricHealthMaxReportsReached (retryable; user should retry with exponential delay until the report is accepted).
Client.HealthManager.ReportHealth(deployedServicePackageHealthReport);
}
/// <summary>
/// Returns a health report
/// </summary>
/// <param name="context">The service fabric context that the health report is for</param>
/// <param name="reportSourceId">The unique reporting source id</param>
/// <param name="propertyName">The name of the health property being reported on</param>
/// <param name="state">The current state of the health property</param>
/// <param name="timeToLive">The time to live of the health report</param>
/// <param name="reportType">The entity type the report is for</param>
/// <returns>A health report for the appropriate reporting entity</returns>
public static HealthReport GetHealthReport(ServiceContext context, string reportSourceId, string propertyName, HealthState state, ReportTypes reportType, TimeSpan timeToLive)
{
HealthReport report;
var information = new HealthInformation(reportSourceId, propertyName, state);
information.Description = $"{ propertyName } health state { Enum.GetName(typeof(HealthState), state) }";
information.RemoveWhenExpired = true;
information.TimeToLive = timeToLive;
information.SequenceNumber = HealthInformation.AutoSequenceNumber;
switch (reportType)
{
case ReportTypes.Cluster:
report = new ClusterHealthReport(information);
break;
case ReportTypes.Application:
report = new ApplicationHealthReport(new Uri(context.CodePackageActivationContext.ApplicationName), information);
break;
case ReportTypes.DeployedApplication:
report = new DeployedApplicationHealthReport(new Uri(context.CodePackageActivationContext.ApplicationName), context.NodeContext.NodeName, information);
break;
case ReportTypes.Service:
report = new ServiceHealthReport(context.ServiceName, information);
break;
case ReportTypes.DeployedService:
report = new DeployedServicePackageHealthReport(new Uri(context.CodePackageActivationContext.ApplicationName), context.CodePackageActivationContext.GetServiceManifestName(), context.NodeContext.NodeName, information);
break;
case ReportTypes.Node:
report = new NodeHealthReport(context.NodeContext.NodeName, information);
break;
case ReportTypes.Instance:
if (context is StatelessServiceContext)
{
report = new StatelessServiceInstanceHealthReport(context.PartitionId, context.ReplicaOrInstanceId, information);
}
else
{
report = new StatefulServiceReplicaHealthReport(context.PartitionId, context.ReplicaOrInstanceId, information);
}
break;
default:
throw new ArgumentException("Unknown health type", nameof(reportType));
}
return report;
}
