Sindweller opened a new issue #696:
URL: https://github.com/apache/apisix-ingress-controller/issues/696
### Issue description
Take `sync_operation_total` as an example:
```
func (c *collector) IncrSyncOperation(resource, result string) {
c.syncOperation.With(prometheus.Labels{
"resource": resource,
"result": result,
}).Inc()
log.Infow("-------sync operation-----")
log.Infow(resource)
log.Infow(result)
}
```
I add some log output to see whether the program reaches this function. And
I got some output like:
```
2021-09-28T16:34:55+08:00 info metrics/prometheus.go:226
-------sync operation-----
2021-09-28T16:34:55+08:00 info metrics/prometheus.go:227
endpoints
2021-09-28T16:34:55+08:00 info metrics/prometheus.go:228 success
```
So it seems there's an endpoint sync operation exist and has been synced
successful.
But there's still only a single record exist in Prometheus:
```
# HELP apisix_ingress_controller_sync_operation_total Number of sync
operations
# TYPE apisix_ingress_controller_sync_operation_total counter
apisix_ingress_controller_sync_operation_total{controller_namespace="default",controller_pod="",resource="schema",result="success"}
1
```
**There's no `endpoint` in the record. What's the problem it might be?**
Related PR: #670
(There's no `events_total` and `check_cluster_health_total` as well, even
the log outputs
```
2021-09-28T15:11:18+08:00 info metrics/prometheus.go:242
-------event------
2021-09-28T15:11:18+08:00 info metrics/prometheus.go:243 pod
2021-09-28T15:11:18+08:00 info metrics/prometheus.go:244 add
```
)
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