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Add support for Cloudwatch Composite Alarms #72

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Add support for Cloudwatch Composite Alarms #72

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17 changes: 6 additions & 11 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -233,12 +233,12 @@ var handleCloudWatch = function(event, context) {
var region = event.Records[0].EventSubscriptionArn.split(":")[3];
var subject = "AWS CloudWatch Notification";
var alarmName = message.AlarmName;
var metricName = message.Trigger.MetricName;
var oldState = message.OldStateValue;
var newState = message.NewStateValue;
var alarmDescription = message.AlarmDescription;
var alarmReason = message.NewStateReason;
var trigger = message.Trigger;
var triggeringChildren = message.TriggeringChildren || [] // for composite alarms
var color = "warning";

if (message.NewStateValue === "ALARM") {
Expand All @@ -247,6 +247,10 @@ var handleCloudWatch = function(event, context) {
color = "good";
}

var triggerMessage = trigger
? `${trigger.Statistic} ${trigger.MetricName} ${trigger.ComparisonOperator} ${trigger.Threshold} for ${trigger.EvaluationPeriods} period(s) of ${trigger.Period} seconds.`
: triggeringChildren.map(it => it.Arn).join(" and ") + " transitioned to ALARM state."

var slackMessage = {
text: "*" + subject + "*",
attachments: [
Expand All @@ -255,16 +259,7 @@ var handleCloudWatch = function(event, context) {
"fields": [
{ "title": "Alarm Name", "value": alarmName, "short": true },
{ "title": "Alarm Description", "value": alarmDescription, "short": false},
{
"title": "Trigger",
"value": trigger.Statistic + " "
+ metricName + " "
+ trigger.ComparisonOperator + " "
+ trigger.Threshold + " for "
+ trigger.EvaluationPeriods + " period(s) of "
+ trigger.Period + " seconds.",
"short": false
},
{ "title": "Trigger", "value": triggerMessage, "short": false },
{ "title": "Old State", "value": oldState, "short": true },
{ "title": "Current State", "value": newState, "short": true },
{
Expand Down
3 changes: 2 additions & 1 deletion scripts/test.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -5,9 +5,10 @@ $NODE_LAMBDA run -x test/context.json -j test/sns-codepipeline-event-stage-start
$NODE_LAMBDA run -x test/context.json -j test/sns-codepipeline-event-stage-succeeded.json
$NODE_LAMBDA run -x test/context.json -j test/sns-codepipeline-event-stage-failed.json
$NODE_LAMBDA run -x test/context.json -j test/sns-cloudwatch-event.json
$NODE_LAMBDA run -x test/context.json -j test/sns-cloudwatch-composite-event.json
$NODE_LAMBDA run -x test/context.json -j test/sns-event.json
$NODE_LAMBDA run -x test/context.json -j test/sns-elastic-beanstalk-event.json
$NODE_LAMBDA run -x test/context.json -j test/sns-codedeploy-event.json
$NODE_LAMBDA run -x test/context.json -j test/sns-codedeploy-configuration.json
$NODE_LAMBDA run -x test/context.json -j test/sns-elasticache-event.json
$NODE_LAMBDA run -x test/context.json -j test/sns-autoscaling-event.json
$NODE_LAMBDA run -x test/context.json -j test/sns-autoscaling-event.json
18 changes: 18 additions & 0 deletions test/sns-cloudwatch-composite-event.json
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Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
{
"Records": [
{
"EventSource": "aws:sns",
"EventVersion": "1.0",
"EventSubscriptionArn": "arn:aws:sns:us-west-2:123456789123:CloudWatchNotifications:00000000-0000-0000-0000-000000000000",
"Sns": {
"Type": "Notification",
"MessageId": "82728d9c-3a57-5c0f-b8f6-d730c5b86ba4",
"TopicArn": "arn:aws:sns:us-west-2:123456789123:CloudWatchNotifications",
"Timestamp": "2022-03-17T09:21:51.857Z",
"Subject": "ALARM: \"composite-alarm\" in US West - Oregon",
"Message": "{\"AlarmName\":\"composite-alarm\",\"AlarmDescription\":\"A composite alarm.\",\"AWSAccountId\":\"123456789123\",\"NewStateValue\":\"ALARM\",\"NewStateReason\":\"arn:aws:cloudwatch:us-west-2:123456789123:alarm:Alarm1 transitioned to ALARM at Thursday 17 March, 2022 09:21:51 UTC\",\"StateChangeTime\":\"2022-03-17T09:21:51.792+0000\",\"Region\":\"US West - Oregon\",\"AlarmArn\":\"arn:aws:cloudwatch:us-west-2:123456789123:alarm:composite-alarm\",\"OKActions\":[\"arn:aws:sns:us-west-2:123456789123:topic\"],\"AlarmActions\":[\"arn:aws:sns:us-west-2:123456789123:topic\"],\"InsufficientDataActions\":[],\"OldStateValue\":\"OK\",\"AlarmRule\":\"ALARM(\\\"Alarm1\\\") AND ALARM(\\\"Alarm2\\\")\",\"TriggeringChildren\":[{\"Arn\":\"arn:aws:cloudwatch:us-west-2:123456789123:alarm:Alarm1\",\"State\":{\"Value\":\"ALARM\",\"Timestamp\":\"2022-03-17T09:21:51.792+0000\"}},{\"Arn\":\"arn:aws:cloudwatch:us-west-2:123456789123:alarm:Alarm2\",\"State\":{\"Value\":\"ALARM\",\"Timestamp\":\"2022-03-17T09:21:37.874+0000\"}}]}",
"MessageAttributes": {}
}
}
]
}