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GitHub - eggfoobar/promdiff

Very simple cli tool to query two instances of prometheus and show the difference in markdown/jira/text. Core use case is measuring differences between two running k8s clusters where you make slight alterations and need to see cluster wide differences.

⚠️ Does not support any queries that don't out put single vector values, this tool is born out of needing an easier way to measure something specific.

CLI Flags

Usage of promdiff:
  -c string
        config file to use (default "prom.yaml")
  -f string
        output file to save data (default: stdout)
  -lp int
        left hand padding markdown print out (only used when printing to markdown stdout)
  -o string
        output format (ex. markdown, jira, text) (default "markdown")
  -t string
        custom template file to use
  -w int
        line width for markdown print out (only used when printing to markdown stdout) (default 90)

Example Config

# prometheus instances
unchanged:
  name: "my-unchanged server"
  port: 5050
  host: # <default is https://localhost>
  token: >-
    <jwt bearer token for prometheus instance>
changed:
  name: "my changed server"
  port: 5555
  host: # <default is https://localhost>
  token: >-
    <jwt bearer token for prometheus instance>

# example queries
queries:
  - name: 95th Quantile Over Time (CPU Usage) - Whole Cluster
    query: |
      quantile_over_time(
        .95,
        sum(
          rate(
            container_cpu_usage_seconds_total{namespace!="",container!="POD",name!=""}[5m]
          )
        )[6h:]
      ) * 1000

  - name: Average Over Time (CPU Usage) - Whole Cluster
    query: |
      avg_over_time(
        sum(
          rate(
            container_cpu_usage_seconds_total{namespace!="",container!="POD",name!=""}[5m]
          )
        )[6h:]
      ) * 1000

Example output