private async Task UpdateLastStateEntry(HostsRepository hostsrepo, HostStatesRepository staterepo, EventRepository eventrepo, CancellationToken stoppingToken)
{
var hosts = await hostsrepo.GetAllActive();
await hosts.ForEachAsync(10, async (host) =>
{
await UpdateSingleHostStateEntry(hostsrepo, staterepo, eventrepo, host);
});
}
private async Task CreateStateEntries(HostsRepository hostsrepo, HostStatesRepository staterepo)
{
var states = (await hostsrepo.GetAllActive())
.Select(x => new HostState {
HostId = x.Id
});
staterepo.Add(states);
}
private async Task UpdateSingleHostStateEntry(HostsRepository hostsrepo, HostStatesRepository staterepo, EventRepository eventrepo, Data.Host host)
{
_logger.LogTrace($"Checking host {host.Name} ({host.Hostname})");
var state = staterepo.GetForHost(host.Id)
.Last();
var ping = new Ping();
try
{
var reply = await ping.SendPingAsync(host.Hostname, 2000);
switch (reply.Status)
{
case IPStatus.Success:
state.Delay = (int)reply.RoundtripTime;
switch (reply.RoundtripTime)
{
case long n when n < 70:
state.Status = HostState.StatusEnum.Online;
break;
case long n when n < 300:
state.Status = HostState.StatusEnum.Warning;
break;
case long n when n < 2000:
state.Status = HostState.StatusEnum.Critical;
break;
default:
state.Status = HostState.StatusEnum.Error;
break;
}
await eventrepo.Enqueue(new HostOnlineEvent { HostId = host.Id });
break;
case IPStatus.TimedOut:
state.Status = HostState.StatusEnum.Offline;
await eventrepo.Enqueue(new HostOfflineEvent { HostId = host.Id });
break;
default:
_logger.LogError($"Unknown IPStatus {reply.Status} while checking {host.Hostname}");
state.Status = HostState.StatusEnum.Error;
break;
}
}
catch (Exception)
{
_logger.LogWarning($"Error while checking {host.Name} ({host.Hostname})");
state.Status = HostState.StatusEnum.Error;
}
finally
{
_logger.LogTrace($"Check complete for host {host.Name} ({host.Hostname})");
}
}
