Default value for config.file not honored with explicit web.listen-address

[jtougas]

It seems that adding the --web.listen-address without also setting --config.file fails to correctly read the default configuration file.

In other words both or neither need to be set for things to work. If only --web.listen-address is set:

curl "http://127.0.0.1:9116/snmp?auth=auth-5&module=foo&target=127.0.0.1"
Unknown auth 'auth-5'

We've been running it in docker like this:

docker run -it --rm \
-v /etc/snmp-exporter:/etc/snmp_exporter:ro \
--network=host \
prom/snmp-exporter:v0.25.0

and we hit this problem when adding --web.listen-address like this:

docker run -it --rm \
-v /etc/snmp-exporter:/etc/snmp_exporter:ro \
--network=host \
prom/snmp-exporter:v0.25.0 \
--web.listen-address=127.0.0.1:9116

workaround like this:

docker run -it --rm \
-v /etc/snmp-exporter:/etc/snmp_exporter:ro \
--network=host prom/snmp-exporter:v0.25.0 \
--web.listen-address=127.0.0.1:9116 \
--config.file /etc/snmp_exporter/snmp.yml

This isn't a big problem in my case as I can simply set --config.file and be done with it. It took me a while of head scratching to figure this out though.

[Vandit1604]

I tried using your workaround but it didn't work

docker run -it --rm \
-v /etc/snmp-exporter:/etc/snmp_exporter:ro \
--network=host prom/snmp-exporter:v0.25.0 \
--web.listen-address=127.0.0.1:9116 \
--config.file /etc/snmp_exporter/snmp.yml

curl "http://127.0.0.1:9116/snmp?auth=auth-5&module=foo&target=127.0.0.1"
Unknown auth 'auth-5'

Can you share your config here for further investigation?

[jtougas]

auth-5 must be present in the config file:

auths:
  auth-5:
    community: foo
    security_level: noAuthNoPriv
    auth_protocol: MD5
    priv_protocol: DES
    version: 2