elb-other-5xx-alarm
v1.1.0
Published
CloudWatch Alarm for HTTPCode_ELB_5XX_Count excluding 500, 502, 503, and 504 (e.g. 501, 505, 561)
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ELB Other 5XX Alarm
What is
AWS CDK construct library for a CloudWatch Alarm for Elastic Load Balancing that fires on HTTPCode_ELB_5XX_Count excluding 500, 502, 503, and 504 (e.g. 501, 505, 561).
Metrics for concrete status codes such as 500 are provided (e.g. HTTPCode_ELB_500_Count). Therefore, it is useful to distinguish detection from them.
For more information, please see the following blog page. here.
CloudWatch Composite Alarm
The "ELB Other 5XX Alarm" by this construct uses the CloudWatch Composite Alarm.
The alarm rule for this composite alarm is as follows.
ALARM(HTTPCode_ELB_5XX_Count)
AND (
NOT (
ALARM(HTTPCode_ELB_500_Count)
OR ALARM(HTTPCode_ELB_502_Count)
OR ALARM(HTTPCode_ELB_503_Count)
OR ALARM(HTTPCode_ELB_504_Count)
)
)
This is actually implemented using a suppressor alarm.
Usage
npm install elb-other-5xx-alarm
import { ELBOther5XXAlarm } from 'elb-other-5xx-alarm';
new ELBOther5XXAlarm(this, 'ELBOther5XXAlarm', {
alarmName: 'my-alarm',
alarmActions: alarmActions, // e.g. [new SnsAction(new Topic(this, 'Topic', {}))]
loadBalancerFullName: alb.loadBalancerFullName, // e.g. 'app/alb/123456789'
period: Duration.seconds(60),
threshold: 1,
evaluationPeriods: 1,
});