Zabbix JSONpath LLD - json

Question

I am trying to make discoverig instances from AWS Auto Scaling Group.
I have json like this:
{
"AutoScalingGroups": [
{
"AutoScalingGroupName": "xxx",
"AutoScalingGroupARN": "arn:aws:autoscaling:eu-central-1:xxx",
"LaunchTemplate": {
"LaunchTemplateId": "lt-xxx",
"LaunchTemplateName": "xxx",
"Version": "$Latest"
},
"MinSize": 2,
"MaxSize": 10,
"DesiredCapacity": 2,
"DefaultCooldown": 300,
"AvailabilityZones": [
"eu-central-1a",
"eu-central-1c",
"eu-central-1b"
],
"LoadBalancerNames": [],
"TargetGroupARNs": [],
"HealthCheckType": "EC2",
"HealthCheckGracePeriod": 0,
"Instances": [
{
"InstanceId": "i-xxx111",
"InstanceType": "c5.2xlarge",
"AvailabilityZone": "eu-central-1b",
"LifecycleState": "InService",
"HealthStatus": "Healthy",
"LaunchTemplate": {
"LaunchTemplateId": "lt-xxx",
"LaunchTemplateName": "xxx",
"Version": "11"
},
"ProtectedFromScaleIn": false
},
{
"InstanceId": "i-xxx222",
"InstanceType": "c5.2xlarge",
"AvailabilityZone": "eu-central-1a",
"LifecycleState": "InService",
"HealthStatus": "Healthy",
"LaunchTemplate": {
"LaunchTemplateId": "lt-xxx",
"LaunchTemplateName": "xxx",
"Version": "11"
},
"ProtectedFromScaleIn": false
}
]
}
]
}
And I want to create discovered items with name of instance id and values - healthstatus.
I created discovery rule with master item as previous json. And i got instance ids with item prototype that have next preprocessing JSONPath - $.AutoScalingGroups.[*].Instances.[*].InstanceId
This item has value next format ["i-xxx111","i-xxx222"], but i dont understand how to create next item prototype with names as each instance-id from this list.
So, can someone help me?
I am using zabbix version 6.2.4

Answer 1

You need to turn that object in the Zabbix LLD format. Using JSONpath won't help us in this case. You can use a JavaScript preprocessing in the Zabbix Item.
res = []
obj = JSON.parse(value)
for (asg in obj.AutoScalingGroups) {
for (i in obj.AutoScalingGroups[asg].Instances) {
res.push({"id": obj.AutoScalingGroups[asg].Instances[i].InstanceId})
}
}
return JSON.stringify(res)
result: [{"id":"i-xxx111"},{"id":"i-xxx222"}]
Don't forget to turn $.id in {#ID} in Zabbix LLD macro.
(Would be easier if we could use for (.. of ..) in ducktape...)
Here's a fiddle: https://jsfiddle.net/egch0vap/1/
See: https://www.zabbix.com/documentation/current/en/manual/config/items/preprocessing/javascript