-
Change Request
-
Resolution: Fixed
-
Trivial
-
None
-
None
-
Sprint 101 (Jun 2023)
-
1
In kubernetes tempaltes the LLD data is generated using the following preprocessing steps
- prometheus to json (to convert the required metrics to JSON format)
- javascript (so simplify converted JSON and embed LLD macros)
- throttle
The second step (javascript) could be dropped by defining LLD macros in LLD rule configuration.
For example the following data can be extracted with prometheus to json:
[
{
"name": "kube_replicaset_status_replicas",
"value": "2",
"line_raw": "kube_replicaset_status_replicas{namespace=\"kube-system\",replicaset=\"coredns-787d4945fb\"} 2",
"labels": {
"namespace": "kube-system",
"replicaset": "coredns-787d4945fb"
},
"type": "gauge",
"help": "The number of replicas per ReplicaSet."
},
{
"name": "kube_replicaset_status_replicas",
"value": "1",
"line_raw": "kube_replicaset_status_replicas{namespace=\"monitoring\",replicaset=\"zabbix-kube-state-metrics-56b6f796bc\"} 1",
"labels": {
"namespace": "monitoring",
"replicaset": "zabbix-kube-state-metrics-56b6f796bc"
},
"type": "gauge",
"help": "The number of replicas per ReplicaSet."
},
{
"name": "kube_replicaset_status_replicas",
"value": "1",
"line_raw": "kube_replicaset_status_replicas{namespace=\"monitoring\",replicaset=\"zabbix-proxy-858c66755c\"} 1",
"labels": {
"namespace": "monitoring",
"replicaset": "zabbix-proxy-858c66755c"
},
"type": "gauge",
"help": "The number of replicas per ReplicaSet."
},
{
"name": "kube_replicaset_status_replicas",
"value": "6",
"line_raw": "kube_replicaset_status_replicas{namespace=\"default\",replicaset=\"nginx-deployment-57b4bdfdf7\"} 6",
"labels": {
"namespace": "default",
"replicaset": "nginx-deployment-57b4bdfdf7"
},
"type": "gauge",
"help": "The number of replicas per ReplicaSet."
},
{
"name": "kube_replicaset_status_replicas",
"value": "1",
"line_raw": "kube_replicaset_status_replicas{namespace=\"kube-system\",replicaset=\"calico-kube-controllers-56dd5794f\"} 1",
"labels": {
"namespace": "kube-system",
"replicaset": "calico-kube-controllers-56dd5794f"
},
"type": "gauge",
"help": "The number of replicas per ReplicaSet."
}
]
Then with javascript it's converted to:
[
{
"{#NAME}": "coredns-787d4945fb",
"{#NAMESPACE}": "kube-system"
},
{
"{#NAME}": "zabbix-kube-state-metrics-56b6f796bc",
"{#NAMESPACE}": "monitoring"
},
{
"{#NAME}": "zabbix-proxy-858c66755c",
"{#NAMESPACE}": "monitoring"
},
{
"{#NAME}": "nginx-deployment-57b4bdfdf7",
"{#NAMESPACE}": "default"
},
{
"{#NAME}": "calico-kube-controllers-56dd5794f",
"{#NAMESPACE}": "kube-system"
}
]
This could be simplified by dropping the conversion and defining the following LLD macros
| {#NAME} | $.labels.replicaset |
| {#NAMESPACE} | $.labels.namespace |
It will result in slightly more memory usage to keep old values for throttling, however it will be partially offset by not having to cache javascript and its bytecode.
