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This release is a pre-release and may not be stable for production use.

promtext-cli

promtext-cli is a tool for creating prometheus text files from a simple cli command.

It is intended for use with cronjob scripts (e.g. backups).

Features:

  • supports merging new metrics into existing files
  • metrics will be updated (same labelset or no labels given), or appended to existing metrics as new timeseries
  • currently only supports gauge metrics

Usage

usage: promtext [-h] [--docs DOCS] [--label KEY=VALUE] [-v] [filename] metric value

Prometheus textfile helper

positional arguments:
  filename           optional path to existing or new prometheus textfile (will be created or updated)
  metric             metric name (new or updated)
  value              metric value

options:
  -h, --help         show this help message and exit
  --docs DOCS        metric documentation
  --label KEY=VALUE  label key=value pairs
  -v, --verbose

If the filename is missing, an file named after the metric in /var/prometheus (or the directory specificed in the PROMTEXT_DIR-ENV) will be used.

Examples

tmp/backup.prom before:

# HELP backup_last_start 
# TYPE backup_last_start gauge
backup_last_start{backup="example_1"} 1.721923501e+09
# HELP backup_last_end 
# TYPE backup_last_end gauge
backup_last_end{backup="example_1"} 1.721989156e+09
# HELP backup_last_exit 
# TYPE backup_last_exit gauge
backup_last_exit{backup="example_1"} 2.0

Updating existing timeseries: promtext tmp/backup.prom backup_last_start 0 --label backup=example_1:

# HELP backup_last_start 
# TYPE backup_last_start gauge
backup_last_start{backup="example_1"} 0.0
# HELP backup_last_end 
# TYPE backup_last_end gauge
backup_last_end{backup="example_1"} 1.721989156e+09
# HELP backup_last_exit 
# TYPE backup_last_exit gauge
backup_last_exit{backup="example_1"} 2.0

Adding a new label: promtext tmp/backup.prom backup_last_start 0 --label backup=example_2

# HELP backup_last_start 
# TYPE backup_last_start gauge
backup_last_start{backup="example_1"} 0.0
backup_last_start{backup="example_2"} 0.0
# HELP backup_last_end 
# TYPE backup_last_end gauge
backup_last_end{backup="example_1"} 1.721989156e+09
# HELP backup_last_exit 
# TYPE backup_last_exit gauge
backup_last_exit{backup="example_1"} 2.0

Adding a new metric: promtext tmp/backup.prom some_other_state 0 --label new_label=foo_bar

# HELP backup_last_start 
# TYPE backup_last_start gauge
backup_last_start{backup="example_1"} 0.0
backup_last_start{backup="example_2"} 0.0
# HELP backup_last_end 
# TYPE backup_last_end gauge
backup_last_end{backup="example_1"} 1.721989156e+09
# HELP backup_last_exit 
# TYPE backup_last_exit gauge
backup_last_exit{backup="example_1"} 2.0
# HELP some_other_state metric appended by promtext-cli
# TYPE some_other_state gauge
some_other_state{new_label="foo_bar"} 0.0

However, changing the label keys does not work:

promtext tmp/backup.prom some_other_state 0 --label foo_bar=foo_bar  
ERROR:promtext_cli.main:labelnames for metric some_other_state not compatible, cannot update! Old: ['new_label'], New: ['foo_bar']

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