public async Task <HealthCheckResult> CheckAsync(CancellationToken cancellationToken = default)
{
var timer = CheckTimer.Start();
try
{
var matchContent = _options.ExpectedContent != null;
var completionOption = matchContent
? HttpCompletionOption.ResponseContentRead
: HttpCompletionOption.ResponseHeadersRead;
using (var response = await HttpClient
.GetAsync(_uri, completionOption, cancellationToken)
.ConfigureAwait(false))
{
string contentString = null;
// if we need to match the content, read it while still timing
if (matchContent)
{
contentString = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
}
// all work has been finished, so stop the timer
var timing = timer.Stop();
if (!response.IsSuccessStatusCode)
{
return(TimedHealthCheckResult.Unhealthy(timing, response.ReasonPhrase));
}
if (timing > _options.UnhealthyThreshold)
{
return(TimedHealthCheckResult.Degraded(timing));
}
if (!matchContent)
{
return(TimedHealthCheckResult.Healthy(timing));
}
// need to match the response content
if (_options.ExpectedContent.Equals(contentString))
{
return(TimedHealthCheckResult.Healthy(timing));
}
return(HealthCheckResult.Degraded("Response content does not match expected content"));
}
}
catch (Exception ex)
{
return(TimedHealthCheckResult.Unhealthy(timer.Stop(), ex));
}
}
public async Task <HealthCheckResult> CheckAsync(CancellationToken cancellationToken = default)
{
var timer = CheckTimer.Start();
try
{
var servers = GetServers().ToList();
var pingTasks = new List <Task <TimeSpan> >();
foreach (var s in servers)
{
if (!s.IsConnected)
{
continue;
}
pingTasks.Add(s.PingAsync());
}
var connectedMsg = $"{pingTasks.Count}/{servers.Count} redis servers connected";
//Nothing connected
if (pingTasks.Count == 0)
{
return(HealthCheckResult.Unhealthy(connectedMsg));
}
//Get the average ping times
var pingResults = await Task.WhenAll(pingTasks).ConfigureAwait(false);
var avg = TimeSpan.FromTicks(Convert.ToInt64(pingResults.Average(p => p.Ticks)));
//Some connected
if (pingTasks.Count != servers.Count)
{
return(TimedHealthCheckResult.Degraded(avg, connectedMsg));
}
//All connected
//Check timing
if (avg > _options.UnhealthyThreshold)
{
return(TimedHealthCheckResult.Degraded(avg));
}
//All good
return(TimedHealthCheckResult.Healthy(avg));
}
catch (Exception ex)
{
return(TimedHealthCheckResult.Unhealthy(timer.Stop(), ex));
}
}