Can't start it when deploying to K8s

[monotok]

Hi,
I am trying to deploy this into my K8s cluster (RKE2) and I can't get the container to run without crashing. I have used my own deployment file and the linked Helm with the same error. I can run the software locally on my Linux machine and within docker. The error does not change, no matter what environment variables I set or not.

Steps for Reproduction

1. The deployment file in K8s. I have not included the secret.
   I tried with the prebuilt image and my own that I built from the project.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: pihole-exporter
  labels:
    app: pihole-exporter
spec:
  replicas: 1
  selector:
    matchLabels:
      app: pihole-exporter
  template:
    metadata:
      name: pihole-exporter
      labels:
        app: pihole-exporter
    spec:
      containers:
        - name: pihole-exporter
#          env:
#            - name: PORT
#              value: "9617"
#            - name: PIHOLE_API_TOKEN
#              valueFrom:
#                secretKeyRef:
#                  key: piholeapi
#                  name: pihole-exporter-secrets
#            - name: PIHOLE_PROTOCOL
#              value: "http"
#            - name: PIHOLE_HOSTNAME
#              value: pihole-exporter.default.svc
          image: ekofr/pihole-exporter:v0.4.0
          imagePullPolicy: IfNotPresent
          ports:
            - containerPort: 9617
      restartPolicy: Always
      

Expected behavior:
INFO[0000] ------------------------------------
2023-09-24T21:43:31.824404025Z INFO[0000] - Pi-hole exporter configuration -
2023-09-24T21:43:31.824409238Z INFO[0000] ------------------------------------
2023-09-24T21:43:31.824413221Z INFO[0000] Go version: go1.21.1
2023-09-24T21:43:31.824416889Z INFO[0000] PIHoleProtocol : [http]
2023-09-24T21:43:31.824420491Z INFO[0000] PIHoleHostname : [127.0.0.1]
2023-09-24T21:43:31.824424262Z INFO[0000] PIHolePort : [80]
2023-09-24T21:43:31.824427984Z INFO[0000] BindAddr : 0.0.0.0
2023-09-24T21:43:31.824431691Z INFO[0000] Port : 9617
2023-09-24T21:43:31.824435374Z INFO[0000] Timeout : 5s
2023-09-24T21:43:31.824439128Z INFO[0000] ------------------------------------
2023-09-24T21:43:31.824445972Z INFO[0000] New Prometheus metric registered: domains_blocked
2023-09-24T21:43:31.824449826Z INFO[0000] New Prometheus metric registered: dns_queries_today
2023-09-24T21:43:31.824453583Z INFO[0000] New Prometheus metric registered: ads_blocked_today
2023-09-24T21:43:31.824457258Z INFO[0000] New Prometheus metric registered: ads_percentag_today
2023-09-24T21:43:31.824460968Z INFO[0000] New Prometheus metric registered: unique_domains
2023-09-24T21:43:31.824464649Z INFO[0000] New Prometheus metric registered: queries_forwarded
2023-09-24T21:43:31.824468398Z INFO[0000] New Prometheus metric registered: queries_cached
2023-09-24T21:43:31.824472111Z INFO[0000] New Prometheus metric registered: clients_ever_seen
2023-09-24T21:43:31.824475878Z INFO[0000] New Prometheus metric registered: unique_clients
2023-09-24T21:43:31.824480281Z INFO[0000] New Prometheus metric registered: dns_queries_all_types
2023-09-24T21:43:31.824484233Z INFO[0000] New Prometheus metric registered: reply
2023-09-24T21:43:31.824488021Z INFO[0000] New Prometheus metric registered: top_queries
2023-09-24T21:43:31.824492329Z INFO[0000] New Prometheus metric registered: top_ads
2023-09-24T21:43:31.824496069Z INFO[0000] New Prometheus metric registered: top_sources
2023-09-24T21:43:31.824523629Z INFO[0000] New Prometheus metric registered: forward_destinations
2023-09-24T21:43:31.824533351Z INFO[0000] New Prometheus metric registered: querytypes
2023-09-24T21:43:31.824537171Z INFO[0000] New Prometheus metric registered: status
2023-09-24T21:43:31.824562213Z INFO[0000] Creating client with config <Config@C0000AE128 PIHoleProtocol=http, PIHoleHostname=127.0.0.1, PIHolePort=80, BindAddr=, Port=0>
2023-09-24T21:43:31.824621285Z INFO[0000] Starting HTTP server

Actual behavior:

The IP listed here is the IP of the service in front of the pihole pod. I have no idea how it finds it.

panic: strconv.ParseUint: parsing "tcp://10.43.132.163:53": invalid syntax
goroutine 1 [running]:
github.com/eko/pihole-exporter/config.Load()
 /go/src/github.com/eko/pihole-exporter/config/configuration.go:67 +0x3f2
main.main()
 /go/src/github.com/eko/pihole-exporter/main.go:14 +0x1f

Platforms:

K8s RKE2 1.25.X

Versions:

Which versions are you running?

0.4.0

[jcelaya]

I had the same problem and the solution is to set the environment variable PIHOLE_PORT to 80. Apparently, that variable is also set by Kubernetes to the value "tcp://{pihole_cluster_ip}:80" and that results in a parse error, because the value is expected to be an integer