mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-29 07:29:42 -08:00
fb30ffda75
Signed-off-by: Pablo Ley <pablo_ley@hotmail.com> Signed-off-by: Pablo Ley <pablo_ley@hotmail.com>
84 lines
2.7 KiB
Markdown
84 lines
2.7 KiB
Markdown
---
|
|
title: Remote Read API
|
|
sort_rank: 7
|
|
---
|
|
|
|
# Remote Read API
|
|
|
|
This is not currently considered part of the stable API and is subject to change
|
|
even between non-major version releases of Prometheus.
|
|
|
|
## Format overview
|
|
|
|
The API response format is JSON. Every successful API request returns a `2xx`
|
|
status code.
|
|
|
|
Invalid requests that reach the API handlers return a JSON error object
|
|
and one of the following HTTP response codes:
|
|
|
|
- `400 Bad Request` when parameters are missing or incorrect.
|
|
- `422 Unprocessable Entity` when an expression can't be executed
|
|
([RFC4918](https://tools.ietf.org/html/rfc4918#page-78)).
|
|
- `503 Service Unavailable` when queries time out or abort.
|
|
|
|
Other non-`2xx` codes may be returned for errors occurring before the API
|
|
endpoint is reached.
|
|
|
|
An array of warnings may be returned if there are errors that do
|
|
not inhibit the request execution. All of the data that was successfully
|
|
collected will be returned in the data field.
|
|
|
|
The JSON response envelope format is as follows:
|
|
|
|
```
|
|
{
|
|
"status": "success" | "error",
|
|
"data": <data>,
|
|
|
|
// Only set if status is "error". The data field may still hold
|
|
// additional data.
|
|
"errorType": "<string>",
|
|
"error": "<string>",
|
|
|
|
// Only if there were warnings while executing the request.
|
|
// There will still be data in the data field.
|
|
"warnings": ["<string>"]
|
|
}
|
|
```
|
|
|
|
Generic placeholders are defined as follows:
|
|
|
|
* `<rfc3339 | unix_timestamp>`: Input timestamps may be provided either in
|
|
[RFC3339](https://www.ietf.org/rfc/rfc3339.txt) format or as a Unix timestamp
|
|
in seconds, with optional decimal places for sub-second precision. Output
|
|
timestamps are always represented as Unix timestamps in seconds.
|
|
* `<series_selector>`: Prometheus [time series
|
|
selectors](basics.md#time-series-selectors) like `http_requests_total` or
|
|
`http_requests_total{method=~"(GET|POST)"}` and need to be URL-encoded.
|
|
* `<duration>`: [Prometheus duration strings](basics.md#time_durations).
|
|
For example, `5m` refers to a duration of 5 minutes.
|
|
* `<bool>`: boolean values (strings `true` and `false`).
|
|
|
|
Note: Names of query parameters that may be repeated end with `[]`.
|
|
|
|
## Remote Read API
|
|
|
|
This API provides data read functionality from Prometheus. This interface expects [snappy](https://github.com/google/snappy) compression.
|
|
The API definition is located [here](https://github.com/prometheus/prometheus/blob/master/prompb/remote.proto).
|
|
|
|
Request are made to the following endpoint.
|
|
```
|
|
/api/v1/read
|
|
```
|
|
|
|
### Samples
|
|
|
|
This returns a message that includes a list of raw samples.
|
|
|
|
### Streamed Chunks
|
|
|
|
These streamed chunks utilize an XOR algorithm inspired by the [Gorilla](http://www.vldb.org/pvldb/vol8/p1816-teller.pdf)
|
|
compression to encode the chunks. However, it provides resolution to the millisecond instead of to the second.
|
|
|
|
|