Grafana

Introduction

This is a quick page to note about setup of Grafana

CA Cert

The CA Cert is configured against the datasource. You cut and paste the rootCA.pem. Otherwise you get the error

client: failed to call resources: error querying resource: Post \"https://192.168.1.220:9090/api/v1/labels\": tls: failed to verify certificate: x509: certificate signed by unknown authority

Data Frames

Gosh it is all lingo. This is what grafana refers to for it internal layout.

{
  "status": "success",
  "data": {
    "resultType": "matrix",
    "result": [
      {
        "metric": {
          "__name__": "caddy_requests_by_5min",
          "bucket": "1752712500",
          "instance": "192.168.1.220:8080",
          "job": "bibble-caddy-exporter",
          "site": "wiki.bibble.co.nz"
        },
        "values": [
          [
            1752719700,
            "123"
          ]
        ]
      },
      {
        "metric": {
          "__name__": "caddy_requests_by_5min",
          "bucket": "1752712800",
          "instance": "192.168.1.220:8080",
          "job": "bibble-caddy-exporter",
          "site": "wiki.bibble.co.nz"
        },
        "values": [
          [
            1752719700,
            "118"
          ]
        ]
      },
    ]
  }
}

View a data frame this would look like this. Note it is the prometheus generated timestamp in the value which makes these data frames. Here they are not unique because the scrape time was the same.

Time (Scrape TS)	Value	Bucket Label	Site	Instance	Job	Frame Explanation
1752719700	123	1752712500	wiki.bibble.co.nz	192.168.1.220:8080	bibble-caddy-exporter	Unique frame due to scrape timestamp
1752719700	118	1752712800	wiki.bibble.co.nz	192.168.1.220:8080	bibble-caddy-exporter	Separate frame (same scrape time, different labels)
1752719700	104	1752712500	www.bibble.co.nz	192.168.1.220:8080	bibble-caddy-exporter	Separate frame (same scrape time, different site)