This Prometheus exporter operates similar to the Blackbox exporters. It downloads a JSON file and provides a numerical gauge value from within that file. Which value to pick is defined through JsonPath.
target: URL / Json-file to downloadjsonpath: the field name to read the value from, this follows the syntax provided by oliveagle/jsonpathmultiple(optional): the factor to be used to multiple with the parsed value before return. (NOTE: ignored when the value is boolean)
docker build -t json_exporter .
docker -d -p 9116:9116 --name json_exporter json_exporter
The related metrics can then be found under:
http://localhost:9116/probe?target=http://validate.jsontest.com/?json=%7B%22key%22:%22value%22%7D&jsonpath=$.parse_time_nanoseconds
The json exporter needs to be passed the target and the json as a parameter, this can be done with relabelling.
Example config:
scrape_configs:
- job_name: 'json'
metrics_path: /probe
params:
jsonpath: [$.parse_time_nanoseconds] # Look for the nanoseconds field
static_configs:
- targets:
- http://validate.jsontest.com/?json=%7B%22key%22:%22value%22%7D
relabel_configs:
- source_labels: [__address__]
target_label: __param_target
- source_labels: [__param_target]
target_label: instance
- target_label: __address__
replacement: 127.0.0.1:9116 # Json exporter.
metric_relabel_configs:
- source_labels: value
target_label: parse_time
MIT License