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use std::sync::{Arc, RwLock};
use std::time::{Duration, Instant};
use opentelemetry::{global, metrics::*, KeyValue};
use crate::system::{ClusterHealthStatus, System};
/// TableMetrics reference all counter used for metrics
pub struct SystemMetrics {
// Static values
pub(crate) _garage_build_info: ValueObserver<u64>,
pub(crate) _replication_factor: ValueObserver<u64>,
// Disk space values from System::local_status
pub(crate) _disk_avail: ValueObserver<u64>,
pub(crate) _disk_total: ValueObserver<u64>,
// Health report from System::health()
pub(crate) _cluster_healthy: ValueObserver<u64>,
pub(crate) _cluster_available: ValueObserver<u64>,
pub(crate) _known_nodes: ValueObserver<u64>,
pub(crate) _connected_nodes: ValueObserver<u64>,
pub(crate) _storage_nodes: ValueObserver<u64>,
pub(crate) _storage_nodes_ok: ValueObserver<u64>,
pub(crate) _partitions: ValueObserver<u64>,
pub(crate) _partitions_quorum: ValueObserver<u64>,
pub(crate) _partitions_all_ok: ValueObserver<u64>,
}
impl SystemMetrics {
pub fn new(system: Arc<System>) -> Self {
let meter = global::meter("garage_system");
let health_cache = RwLock::new((Instant::now(), system.health()));
let system2 = system.clone();
let get_health = Arc::new(move || {
{
let cache = health_cache.read().unwrap();
if cache.0 > Instant::now() - Duration::from_secs(1) {
return cache.1;
}
}
let health = system2.health();
*health_cache.write().unwrap() = (Instant::now(), health);
health
});
Self {
// Static values
_garage_build_info: meter
.u64_value_observer("garage_build_info", move |observer| {
observer.observe(
1,
&[
KeyValue::new("rustversion", garage_util::version::rust_version()),
KeyValue::new("version", garage_util::version::garage_version()),
],
)
})
.with_description("Garage build info")
.init(),
_replication_factor: {
let replication_factor = system.replication_factor;
meter
.u64_value_observer("garage_replication_factor", move |observer| {
observer.observe(replication_factor as u64, &[])
})
.with_description("Garage replication factor setting")
.init()
},
// Disk space values from System::local_status
_disk_avail: {
let system = system.clone();
meter
.u64_value_observer("garage_local_disk_avail", move |observer| {
let st = system.local_status.read().unwrap();
if let Some((avail, _total)) = st.data_disk_avail {
observer.observe(avail, &[KeyValue::new("volume", "data")]);
}
if let Some((avail, _total)) = st.meta_disk_avail {
observer.observe(avail, &[KeyValue::new("volume", "metadata")]);
}
})
.with_description("Garage available disk space on each node")
.init()
},
_disk_total: {
let system = system.clone();
meter
.u64_value_observer("garage_local_disk_total", move |observer| {
let st = system.local_status.read().unwrap();
if let Some((_avail, total)) = st.data_disk_avail {
observer.observe(total, &[KeyValue::new("volume", "data")]);
}
if let Some((_avail, total)) = st.meta_disk_avail {
observer.observe(total, &[KeyValue::new("volume", "metadata")]);
}
})
.with_description("Garage total disk space on each node")
.init()
},
// Health report from System::()
_cluster_healthy: {
let get_health = get_health.clone();
meter
.u64_value_observer("cluster_healthy", move |observer| {
let h = get_health();
if h.status == ClusterHealthStatus::Healthy {
observer.observe(1, &[]);
} else {
observer.observe(0, &[]);
}
})
.with_description("Whether all storage nodes are connected")
.init()
},
_cluster_available: {
let get_health = get_health.clone();
meter.u64_value_observer("cluster_available", move |observer| {
let h = get_health();
if h.status != ClusterHealthStatus::Unavailable {
observer.observe(1, &[]);
} else {
observer.observe(0, &[]);
}
})
.with_description("Whether all requests can be served, even if some storage nodes are disconnected")
.init()
},
_known_nodes: {
let get_health = get_health.clone();
meter
.u64_value_observer("cluster_known_nodes", move |observer| {
let h = get_health();
observer.observe(h.known_nodes as u64, &[]);
})
.with_description("Number of nodes already seen once in the cluster")
.init()
},
_connected_nodes: {
let get_health = get_health.clone();
meter
.u64_value_observer("cluster_connected_nodes", move |observer| {
let h = get_health();
observer.observe(h.connected_nodes as u64, &[]);
})
.with_description("Number of nodes currently connected")
.init()
},
_storage_nodes: {
let get_health = get_health.clone();
meter
.u64_value_observer("cluster_storage_nodes", move |observer| {
let h = get_health();
observer.observe(h.storage_nodes as u64, &[]);
})
.with_description("Number of storage nodes declared in the current layout")
.init()
},
_storage_nodes_ok: {
let get_health = get_health.clone();
meter
.u64_value_observer("cluster_storage_nodes_ok", move |observer| {
let h = get_health();
observer.observe(h.storage_nodes_ok as u64, &[]);
})
.with_description("Number of storage nodes currently connected")
.init()
},
_partitions: {
let get_health = get_health.clone();
meter
.u64_value_observer("cluster_partitions", move |observer| {
let h = get_health();
observer.observe(h.partitions as u64, &[]);
})
.with_description("Number of partitions in the layout")
.init()
},
_partitions_quorum: {
let get_health = get_health.clone();
meter
.u64_value_observer("cluster_partitions_quorum", move |observer| {
let h = get_health();
observer.observe(h.partitions_quorum as u64, &[]);
})
.with_description(
"Number of partitions for which we have a quorum of connected nodes",
)
.init()
},
_partitions_all_ok: {
let get_health = get_health.clone();
meter
.u64_value_observer("cluster_partitions_all_ok", move |observer| {
let h = get_health();
observer.observe(h.partitions_all_ok as u64, &[]);
})
.with_description(
"Number of partitions for which all storage nodes are connected",
)
.init()
},
}
}
}
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