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Issues with Setting Up Telemetry
The story so far...
I have Reef-pi running, set up on a Rpi3B.  I have the software auto-starting AFTER the network comes up, and is now binding to HTTPS automagically.  I've got the sensors and outputs all working and doing reef-pi things as they should.

Okay, the next chapter in my adventure with reef-pi... Telemetry.
In this same network, I have two more servers (both VM's).  One is running Prometheus (via docker container managed via Portainer), and another is running Grafana.  Not liking the graphs in Reef-Pi, I wanted to stitch together the various parts mentioned so as to leverage Grafana for graphing. The post on R2R is based on running Reef-pi on a x86 environment and is a vertical stack on a single host, so I've had to deviate from the published directions.  And it's bitten me in the @#$%. :P

(IP's in this post changed for security)
So, I have set up Reef-pi and Node_Exporter on the Rpi (  The post doesn't provide installation guidance for Node_Exporter, so I had to fart around a little but now have it installed and running:

# node_exporter --version
node_exporter, version 1.5.0 (branch: HEAD, revision: 1b48970ffcf5630534fb00bb0687d73c66d1c959)
  build user:       root@6e7732a7b81b
  build date:       20221129-18:59:41
  go version:       go1.19.3
  platform:         linux/arm64

If I browse to - I can see data (Exert):
# HELP node_scrape_collector_duration_seconds node_exporter: Duration of a collector scrape.
# TYPE node_scrape_collector_duration_seconds gauge
node_scrape_collector_duration_seconds{collector="arp"} 0.000299374
node_scrape_collector_duration_seconds{collector="bcache"} 5.5989e-05
node_scrape_collector_duration_seconds{collector="bonding"} 7.9896e-05
node_scrape_collector_duration_seconds{collector="btrfs"} 0.000721872
node_scrape_collector_duration_seconds{collector="conntrack"} 8.8645e-05
node_scrape_collector_duration_seconds{collector="cpu"} 0.089248409
{there's more but this post was gonna be long enough}

On a second server, I have Prometheus up on running in a container.  I've modified the /etc/prometheus/prometheus.yml file to add the reef-pi job.  I had to modify the 'metrics path' as there was none published at /x/metrics:
  scrape_interval:     15s # By default, scrape targets every 15 seconds.

  # Attach these labels to any time series or alerts when communicating with
  # external systems (federation, remote storage, Alertmanager).
    monitor: 'codelab-monitor'

# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
  - job_name: 'prometheus'

    # Override the global default and scrape targets from this job every 5 seconds.
    scrape_interval: 5s

      - targets: ['localhost:9090']
  - job_name: 'pihole-1'
      - targets: ['x.x.x.x:99999']
  - job_name: 'pihole-2'
      - targets: ['x.x.x.x:99999']
  - job_name: 'reef-pi'
    metrics_path: '/metrics'
      - targets: ['']

Finally, I have a third server ( with Grafana installed.  I've created a Prometheus data source, provided the URL and set it to server mode.  Hitting "Save & Test", it tells me "Data source is working".  Finally, I have the Node_Exporter dashboard installed (ID: 1860).

I SHOULD, I would think, be able to open the dashboard, select my data source, job, and host, and see data.  I can't.  When I open the dashboard, I get three errors:
"{Templating} Failed to upgrade legacy queries e.replace is not a function", "{Templating [job]} Error updating options: e.replace is not a function", and "{Templating [node]} Error updating options: e.replace is not a function".  The Datasource drop-down populates, but the Job and Host drop-downs do not.

Any help is appreciated.
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Sorry wish I could help but I don't know anything about this but yeah does seem rather complicated. Your best option is to post on R2R, someone there can probably help.
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  • BlakeD
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