CODEWITHSUNDEEP
prometheus
shivcena
shivcena

Reputation: 2053

How to get prometheus metrics using c++?

I am trying to get the required prometheus metrics values using c++ code. For example, i need to execute the currently running metrics query "go_gc_duration_seconds{quantile="0"}" using c++ code and get the value of the query. If somebody having sample projects kindly share and assist me.

Upvotes: 1

Views: 3806

Answers (2)

Steve
Steve

Reputation: 217

It seems that you'll need to make the http request, and parse the json to extract the results. This can be done quite easily using e.g.

Upvotes: 0

donglou
donglou

Reputation: 11

The way I get prometheus metrics using c++ is like this:

  1. Select a client library for modern c++, https://github.com/jupp0r/prometheus-cpp it is a good choice.

  2. Create a exposer(actually a http server), like Exposer exposer{"127.0.0.1:8080"};

  3. Create a metrics registry, like auto registry = std::make_shared<Registry>();

  4. Set value or get value

std::map<std::string, std::string> labels; 

labels.insert(make_pair("quantile", "0")); 

auto &counter_family = BuildCounter().Name('go_gc_duration_seconds').Register(*registry_ptr_);


auto &metric_counter = counter_family.Add(labels);

we can use http api to get value.

Upvotes: 1

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