Mongodb_exporter export only one mongodb metric ( --collect-all is on) - mongodb

Question

I have an issue with mongodb_exporter (prometheus metrics exporter for mongodb). I think it's because of a configuration problem in my side but after 2 days of searching I'm empty of solution :)
I run mongodb on K8S and mongodb_exporter as a sidecar pod.
exporter starts OK (I think, because no error), display some metrics but my problem is that's only "go" metrics (see below), I have just one "mongodb" metric!! => mongodb_up 1. Even if i put options "--collect-all" or "--collector.collstats".
I do not have any "useful" metric on my "config" database such as collections size, etc....
Connection to the database is OK because if I change username/password/db port I ran to connection problem.
My user have correct rights I think (changing real password to "password" in my text) :
Successfully added user: {
"user" : "exporter",
"roles" : [
{
"role" : "clusterMonitor",
"db" : "admin"
},
{
"role" : "read",
"db" : "local"
}
]
}
Here is my pod configuration :
- name: metrics
image: docker.io/bitnami/mongodb-exporter:latest
command:
- /bin/bash
- '-ec'
args:
- >
/bin/mongodb_exporter --web.listen-address ":9216"
--mongodb.uri=mongodb://exporter:password#localhost:27017/config? --log.level="debug" --collect-all
ports:
- name: metrics
containerPort: 9216
protocol: TCP
env:
resources:
limits:
cpu: 50m
memory: 250Mi
requests:
cpu: 25m
memory: 50Mi
livenessProbe:
httpGet:
path: /
port: metrics
scheme: HTTP
initialDelaySeconds: 15
timeoutSeconds: 5
periodSeconds: 5
successThreshold: 1
failureThreshold: 3
readinessProbe:
httpGet:
path: /
port: metrics
scheme: HTTP
initialDelaySeconds: 5
timeoutSeconds: 1
periodSeconds: 5
successThreshold: 1
failureThreshold: 3
Logs
Exporter start log (with debug activated) :
time="2023-02-03T09:02:25Z" level=debug msg="Compatible mode: false"
time="2023-02-03T09:02:25Z" level=debug msg="Connection URI: mongodb://exporter:password#localhost:27017/config?"
level=info ts=2023-02-03T09:02:25.224Z caller=tls_config.go:195 msg="TLS is disabled." http2=false
Displayed metrics :
# HELP collector_scrape_time_ms Time taken for scrape by collector
# TYPE collector_scrape_time_ms gauge
collector_scrape_time_ms{collector="general",exporter="mongodb"} 0
# HELP go_gc_duration_seconds A summary of the pause duration of garbage collection cycles.
# TYPE go_gc_duration_seconds summary
go_gc_duration_seconds{quantile="0"} 0
go_gc_duration_seconds{quantile="0.25"} 0
go_gc_duration_seconds{quantile="0.5"} 0
go_gc_duration_seconds{quantile="0.75"} 0
go_gc_duration_seconds{quantile="1"} 0
go_gc_duration_seconds_sum 0
go_gc_duration_seconds_count 0
# HELP go_goroutines Number of goroutines that currently exist.
# TYPE go_goroutines gauge
go_goroutines 17
# HELP go_info Information about the Go environment.
# TYPE go_info gauge
go_info{version="go1.17.13"} 1
# HELP go_memstats_alloc_bytes Number of bytes allocated and still in use.
# TYPE go_memstats_alloc_bytes gauge
go_memstats_alloc_bytes 3.655088e+06
# HELP go_memstats_alloc_bytes_total Total number of bytes allocated, even if freed.
# TYPE go_memstats_alloc_bytes_total counter
go_memstats_alloc_bytes_total 3.655088e+06
[....]
# HELP mongodb_up Whether MongoDB is up.
# TYPE mongodb_up gauge
mongodb_up 1
[...]
# HELP process_virtual_memory_bytes Virtual memory size in bytes.
# TYPE process_virtual_memory_bytes gauge
process_virtual_memory_bytes 7.35940608e+08
# HELP process_virtual_memory_max_bytes Maximum amount of virtual memory available in bytes.
# TYPE process_virtual_memory_max_bytes gauge
process_virtual_memory_max_bytes 1.8446744073709552e+19
Environment
K8S
MongoDB version : 4.2.0
Thanks in advance for any help :)