ghcr.io/hikhvar/mqtt2prometheus:v0.1.7-rc1 config file loading error

[rolinux]

Looks like ghcr.io/hikhvar/mqtt2prometheus:v0.1.7-rc1 triggers the following error:

2022-08-24T12:06:46Z	fatal	cmd/mqtt2prometheus.go:80	Could not load config	{"error": "open config.yaml: no such file or directory"}
main.main
	/home/runner/work/mqtt2prometheus/mqtt2prometheus/cmd/mqtt2prometheus.go:80
runtime.main
	/opt/hostedtoolcache/go/1.19.0/x64/src/runtime/proc.go:250

Moving from latest to v0.1.6 image tag solved the problem.

I can help with further debug but the config file should be there as the helm chart didn't change.

Thank you, Radu

[hikhvar]

Hey, thank you for this bug report. Since the 0.1.7-RC1 release is rather small, I think this problem is either caused by #88 or #84. Can you give me some more details how your deployment in the helm chart looks like?

[rolinux]

# Source: mqtt2prom/templates/deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: release-name-mqtt2prom
  labels:
    helm.sh/chart: mqtt2prom-0.1.0
    app.kubernetes.io/name: mqtt2prom
    app.kubernetes.io/instance: release-name
    app.kubernetes.io/version: "0.1.0"
    app.kubernetes.io/managed-by: Helm
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: mqtt2prom
      app.kubernetes.io/instance: release-name
  template:
    metadata:
      labels:
        app.kubernetes.io/name: mqtt2prom
        app.kubernetes.io/instance: release-name
    spec:
      securityContext:
        {}
      containers:
        - args:
          - /mqtt2prometheus
          - -config
          - /data/config.yaml
          - -log-level
          - debug
          name: mqtt2prom
          image: "ghcr.io/hikhvar/mqtt2prometheus:v0.1.6"
          imagePullPolicy: Always
          ports:
            - name: http
              containerPort: 9641
              protocol: TCP
          # livenessProbe:
          #   httpGet:
          #     path: 
          #     port: http
          #   initialDelaySeconds: 45
          #   periodSeconds: 30
          # readinessProbe:
          #   httpGet:
          #     path: 
          #     port: http
          #   initialDelaySeconds: 45
          #   periodSeconds: 10
          resources:
            limits:
              cpu: 100m
              memory: 128Mi
            requests:
              cpu: 100m
              memory: 128Mi
          volumeMounts:
          - name: mqtt2prom-config-secret-volume
            mountPath: /data/config.yaml
            subPath: config.yaml
            readOnly: true
      volumes:
      - name: mqtt2prom-config-secret-volume
        secret:
          secretName: mqtt2prom-config-secret

The config comes from a secret as the MQTT is password protected.

[hikhvar]

Thank you for the feedback. Will look into it. Can't give a time frame yet.

[hikhvar]

Ok, can reproduce your issue. I think this is relates to https://github.com/hikhvar/mqtt2prometheus/pull/84

% docker run -it -v /tmp/config.yaml:/data/config.yaml ghcr.io/hikhvar/mqtt2prometheus:v0.1.6 /mqtt2prometheus -config /data/config.yaml -log-level debug
2022-09-15T06:47:46Z	warn	cmd/mqtt2prometheus.go:134	could not connect to mqtt broker %s, sleep 10 second	{"error": "network Error : dial tcp 127.0.0.1:1883: connect: connection refused"}

% docker run -it -v /tmp/config.yaml:/data/config.yaml ghcr.io/hikhvar/mqtt2prometheus:v0.1.7-RC1 /mqtt2prometheus -config /data/config.yaml -log-level debug
Unable to find image 'ghcr.io/hikhvar/mqtt2prometheus:v0.1.7-RC1' locally
v0.1.7-RC1: Pulling from hikhvar/mqtt2prometheus
Digest: sha256:935bf9211a329df80ed11e348409e9facd9390ddb3fd7afc7291816ff0e1856a
Status: Downloaded newer image for ghcr.io/hikhvar/mqtt2prometheus:v0.1.7-RC1
2022-09-15T07:06:49Z	fatal	cmd/mqtt2prometheus.go:80	Could not load config	{"error": "open config.yaml: no such file or directory"}
main.main
	/home/runner/work/mqtt2prometheus/mqtt2prometheus/cmd/mqtt2prometheus.go:80
runtime.main
	/opt/hostedtoolcache/go/1.19.0/x64/src/runtime/proc.go:250

If the leading /mqtt2prometheus is ommited, it works again:

docker run -it -v /tmp/config.yaml:/data/config.yaml ghcr.io/hikhvar/mqtt2prometheus:v0.1.7-RC1 -config /data/config.yaml -log-level debug 
2022-09-15T07:08:56Z	warn	cmd/mqtt2prometheus.go:134	could not connect to mqtt broker %s, sleep 10 second	{"error": "network Error : dial tcp 127.0.0.1:1883: connect: connection refused"}

So I think, if you change your deployment to the following it should work again:

# Source: mqtt2prom/templates/deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: release-name-mqtt2prom
  labels:
    helm.sh/chart: mqtt2prom-0.1.0
    app.kubernetes.io/name: mqtt2prom
    app.kubernetes.io/instance: release-name
    app.kubernetes.io/version: "0.1.0"
    app.kubernetes.io/managed-by: Helm
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: mqtt2prom
      app.kubernetes.io/instance: release-name
  template:
    metadata:
      labels:
        app.kubernetes.io/name: mqtt2prom
        app.kubernetes.io/instance: release-name
    spec:
      securityContext:
        {}
      containers:
        - args:
          - -config
          - /data/config.yaml
          - -log-level
          - debug
          name: mqtt2prom
          image: "ghcr.io/hikhvar/mqtt2prometheus:v0.1.7-RC1"
          imagePullPolicy: Always
          ports:
            - name: http
              containerPort: 9641
              protocol: TCP
          # livenessProbe:
          #   httpGet:
          #     path: 
          #     port: http
          #   initialDelaySeconds: 45
          #   periodSeconds: 30
          # readinessProbe:
          #   httpGet:
          #     path: 
          #     port: http
          #   initialDelaySeconds: 45
          #   periodSeconds: 10
          resources:
            limits:
              cpu: 100m
              memory: 128Mi
            requests:
              cpu: 100m
              memory: 128Mi
          volumeMounts:
          - name: mqtt2prom-config-secret-volume
            mountPath: /data/config.yaml
            subPath: config.yaml
            readOnly: true
      volumes:
      - name: mqtt2prom-config-secret-volume
        secret:
          secretName: mqtt2prom-config-secret

[hikhvar]

No response, assume this is fixed.

[hikhvar]

No response, assume this is fixed.