public static async Task <MetricAlarm> UpsertAELBMetricAlarmAsync(
this CloudWatchHelper cwh, ELBHelper elb,
string name,
string loadBalancer,
string targetGroup,
ELBMetricName metric,
ComparisonOperator comparisonOperator,
int treshold,
Statistic statistic = null,
int dataPointToAlarm = 1,
int evaluationPeriod = 1,
int requestDelay = 1000,
CancellationToken cancellationToken = default(CancellationToken))
{
var alb = (await elb.GetLoadBalancersByName(loadBalancer, throwIfNotFound: true)).Single();
var tg = await elb.GetTargetGroupByName(targetGroup, alb, throwIfNotFound : true);
var loadBalanceValue = alb.LoadBalancerArn.SplitByLast(':')[1].TrimStartSingle("loadbalancer/");
var targetGroupValue = tg.TargetGroupArn.SplitByLast(':')[1];
var stat = statistic != null ? statistic :
(comparisonOperator == ComparisonOperator.GreaterThanOrEqualToThreshold || comparisonOperator == ComparisonOperator.GreaterThanThreshold)
? Statistic.Maximum : Statistic.Minimum;
var deleteAlarm = await cwh.DeleteMetricAlarmAsync(name, throwIfNotFound : false);
if (deleteAlarm.HttpStatusCode != System.Net.HttpStatusCode.NotFound)
{
await Task.Delay(requestDelay); //lets ensure metric was removed before we push new request
}
var mar = await cwh.PutAELBMetricAlarmAsync(
name, loadBalanceValue, targetGroupValue,
metric : metric,
comparisonOperator : comparisonOperator,
statistic : stat,
treshold : treshold,
dataPointToAlarm : dataPointToAlarm,
evaluationPeriod : evaluationPeriod,
cancellationToken : cancellationToken);
await Task.Delay(requestDelay); //lets ensure metric exists before we search for it
return(await cwh.GetMetricAlarmAsync(name : name, throwIfNotFound : true, cancellationToken : cancellationToken));
}
public static async Task <StateValue> WaitForMetricState(this CloudWatchHelper cwh, string name, StateValue stateValue, int timeout_s)
{
var sw = Stopwatch.StartNew();
MetricAlarm ma;
do
{
ma = await cwh.GetMetricAlarmAsync(name, throwIfNotFound : true);
if (ma.StateValue == stateValue)
{
return(ma.StateValue);
}
await Task.Delay(1000);
}while (sw.ElapsedMilliseconds < (timeout_s * 1000));
throw new Exception($"Metric '{name}' coudn't reach '{stateValue}' state within {timeout_s} [s], last state was: '{ma.StateValue}'.");
}