ConfigMap integration.mqtt.auth.generic.servers value is not used

[NunoSav]

• [x] The issue is present in the latest release.
• [x] I have searched the issues of this repository and believe that this is not a duplicate.

What happened?

GW Bridge tries to connect to mqtt broker over at 127.0.0.1 instead of whatever value(s) is in the CM

What did you expect?

For GW Bridge to use value in ConfigMap

Steps to reproduce this issue

Steps:

1. Deploy GW Bridge into cluster with config map

Your Environment

Component	Version
Gateway Bridge	4.0.5
Chirpstack API	4.2.0

Note

I went back to version 4.0.1 and issue is gone.

[eelars]

Same issue here but i can connect correctly to the MQTT server in 4.0.3, the issue seems to start with Chirpstack-gateway-bridge 4.0.4 version.

[brocaar]

This should be fixed in v4.0.5 which was released shortly after the v4.0.4 release. See: https://www.chirpstack.io/docs/chirpstack-gateway-bridge/changelog.html#v405.

[brocaar]

I have just re-tried, but I can not reproduce this issue. With v4.0.4 there was indeed an issue, but I believe it was fixed by v4.0.5.

Deploy GW Bridge into cluster with config map

I'm not really sure what this means.

I tried to reproduce the issue by changing:

    [integration.mqtt.auth.generic]
    # MQTT server (e.g. scheme://host:port where scheme is tcp, ssl or ws)
    servers=["tcp://localhost:1883"]

config section to something different and it correctly picked up the new configuration. As well I tried setting the config using an environment variable, and it also picked up this value correctly:

❯ env INTEGRATION__MQTT__AUTH__GENERIC__SERVERS=tcp://foobar:1883 ./build/chirpstack-gateway-bridge
INFO[0000] starting ChirpStack Gateway Bridge            docs="https://www.chirpstack.io/gateway-bridge/" version=4.0.5
INFO[0000] backend/semtechudp: starting gateway udp listener  addr="0.0.0.0:1700"
INFO[0000] metrics: starting prometheus metrics server   bind="127.0.0.1:3030"
ERRO[0000] [client]   dial tcp: lookup foobar on 10.0.0.1:53: no such host  module=mqtt
WARN[0000] [client]   failed to connect to broker, trying next  module=mqtt
ERRO[0000] [client]   Failed to connect to a broker      module=mqtt
ERRO[0000] integration/mqtt: connection error            error="network Error : dial tcp: lookup foobar on 10.0.0.1:53: no such host"

[NunoSav]

Deploy GW Bridge into cluster with config map

I'm not really sure what this means.

I'm deploying Chirpstack inside a k3s cluster and i inject it's configuration through a ConfigMap. With version 4.0.5 running the content of said ConfigMap is ignored.

[brocaar]

Please note that k3s/k8s does a lot of abstraction for you including handing configuration through ConfigMaps. To understand your issue better, could you please simplify it to something I or somebody else can reproduce, without setting up a k3s/k8s cluster?

ChirpStack Gateway Bridge has two ways to receive configuration:

• Through a configuration file
• Through environment variables

As I explained in my previous comment, both work for me.

[NunoSav]

Fair enough, I'll do that when I get some free time and come back to you. Cheers