ingest

Backfill prometheus.

Build

go build

args

  -block-range int
        block range (default 1048576)
  -input-file string
        json input file (default "input")
  -output-dir string
        directory where to put the TSDB (default "output")

Use

1. Create and populate TSDB

(echo "["
for i in $(seq $(date +%s -d "1 month ago")000 1000 $(date +%s)000)
do echo '{"l":{"__name__":"test"}, "t":'$i', "v":'$i'},'
done) | ./ingest -input-file=/dev/stdin -output-dir 1month

2. Start prometheus on top of it

prometheus --storage.tsdb.retention.time=99y --storage.tsdb.path=1month --config.file=$(mktemp)

Json format

[
    {"l":{"__name__":"test"}, "t":1, "v":1}
]

Array of metrics. Metric being objects with 3 fields: labels, timestamps (epoch milliseconds) and value.

There is no need to close the json:

[
    {"l":{"__name__":"test"}, "t":1, "v":1},
    {"l":{"__name__":"test"}, "t":2, "v":2},
    {"l":{"__name__":"test"}, "t":3, "v":3},
    {"l":{"__name__":"test"}, "t":4, "v":4},