303 lines
9.5 KiB
Rust
303 lines
9.5 KiB
Rust
use std::sync::{Arc, RwLock};
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use std::time::{Duration, Instant};
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use opentelemetry::{global, metrics::*, KeyValue};
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use crate::system::{ClusterHealthStatus, System};
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/// TableMetrics reference all counter used for metrics
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pub struct SystemMetrics {
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// Static values
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pub(crate) _garage_build_info: ValueObserver<u64>,
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pub(crate) _replication_factor: ValueObserver<u64>,
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// Disk space values from System::local_status
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pub(crate) _disk_avail: ValueObserver<u64>,
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pub(crate) _disk_total: ValueObserver<u64>,
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// Health report from System::health()
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pub(crate) _cluster_healthy: ValueObserver<u64>,
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pub(crate) _cluster_available: ValueObserver<u64>,
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pub(crate) _known_nodes: ValueObserver<u64>,
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pub(crate) _connected_nodes: ValueObserver<u64>,
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pub(crate) _storage_nodes: ValueObserver<u64>,
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pub(crate) _storage_nodes_ok: ValueObserver<u64>,
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pub(crate) _partitions: ValueObserver<u64>,
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pub(crate) _partitions_quorum: ValueObserver<u64>,
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pub(crate) _partitions_all_ok: ValueObserver<u64>,
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// Status report for individual cluster nodes
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pub(crate) _layout_node_connected: ValueObserver<u64>,
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pub(crate) _layout_node_disconnected_time: ValueObserver<u64>,
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}
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impl SystemMetrics {
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pub fn new(system: Arc<System>) -> Self {
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let meter = global::meter("garage_system");
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let health_cache = RwLock::new((Instant::now(), system.health()));
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let system2 = system.clone();
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let get_health = Arc::new(move || {
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{
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let cache = health_cache.read().unwrap();
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if cache.0 > Instant::now() - Duration::from_secs(1) {
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return cache.1;
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}
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}
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let health = system2.health();
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*health_cache.write().unwrap() = (Instant::now(), health);
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health
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});
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Self {
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// Static values
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_garage_build_info: meter
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.u64_value_observer("garage_build_info", move |observer| {
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observer.observe(
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1,
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&[
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KeyValue::new("rustversion", garage_util::version::rust_version()),
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KeyValue::new("version", garage_util::version::garage_version()),
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],
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)
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})
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.with_description("Garage build info")
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.init(),
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_replication_factor: {
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let replication_factor = system.replication_factor;
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meter
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.u64_value_observer("garage_replication_factor", move |observer| {
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observer.observe(replication_factor.replication_factor() as u64, &[])
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})
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.with_description("Garage replication factor setting")
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.init()
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},
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// Disk space values from System::local_status
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_disk_avail: {
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let system = system.clone();
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meter
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.u64_value_observer("garage_local_disk_avail", move |observer| {
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let st = system.local_status.read().unwrap();
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if let Some((avail, _total)) = st.data_disk_avail {
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observer.observe(avail, &[KeyValue::new("volume", "data")]);
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}
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if let Some((avail, _total)) = st.meta_disk_avail {
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observer.observe(avail, &[KeyValue::new("volume", "metadata")]);
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}
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})
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.with_description("Garage available disk space on each node")
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.init()
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},
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_disk_total: {
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let system = system.clone();
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meter
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.u64_value_observer("garage_local_disk_total", move |observer| {
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let st = system.local_status.read().unwrap();
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if let Some((_avail, total)) = st.data_disk_avail {
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observer.observe(total, &[KeyValue::new("volume", "data")]);
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}
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if let Some((_avail, total)) = st.meta_disk_avail {
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observer.observe(total, &[KeyValue::new("volume", "metadata")]);
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}
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})
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.with_description("Garage total disk space on each node")
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.init()
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},
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// Health report from System::()
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_cluster_healthy: {
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let get_health = get_health.clone();
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meter
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.u64_value_observer("cluster_healthy", move |observer| {
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let h = get_health();
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if h.status == ClusterHealthStatus::Healthy {
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observer.observe(1, &[]);
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} else {
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observer.observe(0, &[]);
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}
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})
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.with_description("Whether all storage nodes are connected")
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.init()
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},
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_cluster_available: {
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let get_health = get_health.clone();
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meter.u64_value_observer("cluster_available", move |observer| {
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let h = get_health();
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if h.status != ClusterHealthStatus::Unavailable {
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observer.observe(1, &[]);
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} else {
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observer.observe(0, &[]);
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}
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})
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.with_description("Whether all requests can be served, even if some storage nodes are disconnected")
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.init()
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},
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_known_nodes: {
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let get_health = get_health.clone();
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meter
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.u64_value_observer("cluster_known_nodes", move |observer| {
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let h = get_health();
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observer.observe(h.known_nodes as u64, &[]);
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})
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.with_description("Number of nodes already seen once in the cluster")
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.init()
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},
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_connected_nodes: {
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let get_health = get_health.clone();
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meter
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.u64_value_observer("cluster_connected_nodes", move |observer| {
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let h = get_health();
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observer.observe(h.connected_nodes as u64, &[]);
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})
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.with_description("Number of nodes currently connected")
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.init()
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},
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_storage_nodes: {
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let get_health = get_health.clone();
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meter
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.u64_value_observer("cluster_storage_nodes", move |observer| {
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let h = get_health();
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observer.observe(h.storage_nodes as u64, &[]);
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})
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.with_description("Number of storage nodes declared in the current layout")
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.init()
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},
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_storage_nodes_ok: {
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let get_health = get_health.clone();
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meter
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.u64_value_observer("cluster_storage_nodes_ok", move |observer| {
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let h = get_health();
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observer.observe(h.storage_nodes_ok as u64, &[]);
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})
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.with_description("Number of storage nodes currently connected")
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.init()
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},
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_partitions: {
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let get_health = get_health.clone();
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meter
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.u64_value_observer("cluster_partitions", move |observer| {
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let h = get_health();
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observer.observe(h.partitions as u64, &[]);
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})
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.with_description("Number of partitions in the layout")
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.init()
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},
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_partitions_quorum: {
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let get_health = get_health.clone();
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meter
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.u64_value_observer("cluster_partitions_quorum", move |observer| {
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let h = get_health();
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observer.observe(h.partitions_quorum as u64, &[]);
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})
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.with_description(
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"Number of partitions for which we have a quorum of connected nodes",
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)
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.init()
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},
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_partitions_all_ok: {
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let get_health = get_health.clone();
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meter
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.u64_value_observer("cluster_partitions_all_ok", move |observer| {
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let h = get_health();
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observer.observe(h.partitions_all_ok as u64, &[]);
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})
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.with_description(
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"Number of partitions for which all storage nodes are connected",
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)
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.init()
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},
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// Status report for individual cluster nodes
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_layout_node_connected: {
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let system = system.clone();
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meter
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.u64_value_observer("cluster_layout_node_connected", move |observer| {
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let layout = system.cluster_layout();
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let nodes = system.get_known_nodes();
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for id in layout.all_nodes().iter() {
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let mut kv = vec![KeyValue::new("id", format!("{:?}", id))];
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if let Some(role) =
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layout.current().roles.get(id).and_then(|r| r.0.as_ref())
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{
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kv.push(KeyValue::new("role_zone", role.zone.clone()));
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match role.capacity {
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Some(cap) => {
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kv.push(KeyValue::new("role_capacity", cap as i64));
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kv.push(KeyValue::new("role_gateway", 0));
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}
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None => {
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kv.push(KeyValue::new("role_gateway", 1));
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}
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}
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}
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let value;
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if let Some(node) = nodes.iter().find(|n| n.id == *id) {
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// TODO: if we add address and hostname, and those change, we
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// get duplicate metrics, due to bad otel aggregation :(
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// Can probably be fixed when we upgrade opentelemetry
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// kv.push(KeyValue::new("address", node.addr.to_string()));
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// kv.push(KeyValue::new(
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// "hostname",
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// node.status.hostname.clone(),
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// ));
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value = if node.is_up { 1 } else { 0 };
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} else {
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value = 0;
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}
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observer.observe(value, &kv);
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}
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})
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.with_description("Connection status for nodes in the cluster layout")
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.init()
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},
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_layout_node_disconnected_time: {
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let system = system.clone();
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meter
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.u64_value_observer("cluster_layout_node_disconnected_time", move |observer| {
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let layout = system.cluster_layout();
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let nodes = system.get_known_nodes();
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for id in layout.all_nodes().iter() {
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let mut kv = vec![KeyValue::new("id", format!("{:?}", id))];
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if let Some(role) =
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layout.current().roles.get(id).and_then(|r| r.0.as_ref())
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{
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kv.push(KeyValue::new("role_zone", role.zone.clone()));
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match role.capacity {
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Some(cap) => {
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kv.push(KeyValue::new("role_capacity", cap as i64));
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kv.push(KeyValue::new("role_gateway", 0));
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}
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None => {
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kv.push(KeyValue::new("role_gateway", 1));
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}
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}
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}
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if let Some(node) = nodes.iter().find(|n| n.id == *id) {
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// TODO: see comment above
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// kv.push(KeyValue::new("address", node.addr.to_string()));
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// kv.push(KeyValue::new(
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// "hostname",
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// node.status.hostname.clone(),
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// ));
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if node.is_up {
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observer.observe(0, &kv);
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} else if let Some(secs) = node.last_seen_secs_ago {
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observer.observe(secs, &kv);
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}
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}
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}
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})
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.with_description(
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"Time (in seconds) since last connection to nodes in the cluster layout",
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)
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.init()
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},
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}
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}
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}
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