public override async Task Run(RuleContext context)
{
// Short-circuit if either instance is being scaled, as the autoscaling is either externally triggered or a
// monitor bug.
await Task.WhenAll(_primaryRedisInstance.RefreshAsync(context.CancellationToken), _secondaryRedisInstance.RefreshAsync(context.CancellationToken)).ThrowIfFailureAsync();
if (!_primaryRedisInstance.IsReadyToScale)
{
Emit(context, "Autoscale", Severity.Info, $"Instance `{_primaryRedisInstance.Name}` is undergoing maintenance or autoscaling operation");
return;
}
if (!_secondaryRedisInstance.IsReadyToScale)
{
Emit(context, "Autoscale", Severity.Info, $"Instance `{_secondaryRedisInstance.Name}` is undergoing maintenance or autoscaling operation");
return;
}
await AttemptToScaleAsync(context, _primaryRedisInstance, context.CancellationToken);
// A long time may have passed since the first scale, so we refresh the data and re-check before looking at
// the secondary.
await Task.WhenAll(_primaryRedisInstance.RefreshAsync(context.CancellationToken), _secondaryRedisInstance.RefreshAsync(context.CancellationToken)).ThrowIfFailureAsync();
if (!_primaryRedisInstance.IsReadyToScale)
{
Emit(context, "Autoscale", Severity.Info, $"Instance `{_primaryRedisInstance.Name}` is undergoing maintenance or autoscaling operation");
return;
}
if (!_secondaryRedisInstance.IsReadyToScale)
{
Emit(context, "Autoscale", Severity.Info, $"Instance `{_secondaryRedisInstance.Name}` is undergoing maintenance or autoscaling operation");
return;
}
await AttemptToScaleAsync(context, _secondaryRedisInstance, context.CancellationToken);
}
