How to push metrics to prometheus api/v1/write API endpoint with CURL

[ihor.pi...@gmail.com]

Here is a set of correct metrics 

cat metrics.prom
# HELP http_requests_total The total number of HTTP requests.
# TYPE http_requests_total counter
http_requests_total{method="post",code="200"} 1027 1395066363000
http_requests_total{method="post",code="400"}    3 1395066363000

cat metrics.prom | promtool check metrics

Then it is supposed to be compressed by snappy as the manual said 

The read and write protocols both use a snappy-compressed protocol buffer encoding over HTTP.

So,

snzip metrics.prom

Then 

curl  --header "Content-Type: application/openmetrics-text" \
--header "Content-Encoding: snappy" \
--request POST \
--data-binary "@metrics.prom.sz" \
"http://localhost:9090/api/v1/write"

but unfortunately, the  result is 

snappy: corrupt input

Why is it corrupt?

snzip -d  metrics.prom.sz

gives perfectly fine result.

[Brian Candler]

The read and write protocols both use a snappy-compressed protocol buffer encoding over HTTP.

I think you have tried to use plain text metrics, when they need to be represented in protobuf binary format (and *then* compressed)