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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