I am writing code to remove metrics from a remote server and output them to localhost:9091. My problem is that I can't understand why the metrics are not displayed on localhost:9091 despite the fact that there is a connection to the server and the removed metrics are selected in the console.
I guess the problem is related to this part of the code:
//creating the prometheus registry
auto registry = std::make_shared<prometheus::Registry>();
auto& ram_usage_gauge = prometheus::BuildGauge()
.Name("node_memory_usage_bytes")
.Help("RAM usage")
.Register(*registry);
prometheus::Exposer exposer{"localhost:9091"};
// collecting indicators every 1 seconds
while (true) {
try {
// getting data about RAM on the server
std::string output = execute_ssh_command(session, "free | grep Mem | awk '{print $3}'");
int node_memory_usage_bytes = std::stoi(output);
std::cout<< node_memory_usage_bytes<< std::endl;
ram_usage_gauge.Add({{"name","id"}})
.Set(node_memory_usage_bytes);
} catch (std::exception& e) {
std::cerr << "Error getting RAM usage: " << e.what() << std::endl;
}
// transferring metrics to port 9091
exposer.RegisterCollectable(registry);
std::this_thread::sleep_for(std::chrono::seconds(1));
}
in the prometheus-cpp documentation (https://jupp0r.github.io/prometheus-cpp /) nothing worthwhile has been written.
