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metrics for online and offline remote server count

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Olivia Lee 2024-08-23 15:45:10 -07:00
parent 5b6aaa19b9
commit 56f025cb47
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2 changed files with 92 additions and 7 deletions
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21
src/observability.rs
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@ -290,6 +290,9 @@ pub(crate) struct Metrics {
/// Number of entries in an
/// [`OnDemandHashMap`](crate::utils::on_demand_hashmap::OnDemandHashMap)
on_demand_hashmap_size: opentelemetry::metrics::Gauge<u64>,
/// Number of known remote servers in each state (online or offline)
remote_server_count: opentelemetry::metrics::Gauge<u64>,
}
impl Metrics {
@ -345,11 +348,17 @@ impl Metrics {
.with_description("Number of entries in OnDemandHashMap")
.init();
let remote_server_count = meter
.u64_gauge("remote_server_count")
.with_description("Number of known remote servers")
.init();
Metrics {
otel_state: (registry, provider),
http_requests_histogram,
lookup,
on_demand_hashmap_size,
remote_server_count,
}
}
@ -384,6 +393,18 @@ impl Metrics {
&[KeyValue::new("name", name)],
);
}
/// Record number of remote servers marked online or offline.
pub(crate) fn record_remote_server_count(
&self,
online_count: u64,
offline_count: u64,
) {
self.remote_server_count
.record(online_count, &[KeyValue::new("state", "online")]);
self.remote_server_count
.record(offline_count, &[KeyValue::new("state", "offline")]);
}
}
/// Track HTTP metrics by converting this into an [`axum`] layer