support some peer rest api

Signed-off-by: mujunxiang <1948535941@qq.com>

madmin/src/metrics.rs

@@ -0,0 +1,69 @@
+use std::collections::{HashMap, HashSet};
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Default, Serialize, Deserialize)]
+pub struct TimedAction {
+    count: u64,
+    acc_time: u64,
+    bytes: u64,
+}
+
+#[derive(Debug, Default, Serialize, Deserialize)]
+pub struct DiskIOStats {
+    read_ios: u64,
+    read_merges: u64,
+    read_sectors: u64,
+    read_ticks: u64,
+    write_ios: u64,
+    write_merges: u64,
+    write_sectors: u64,
+    write_ticks: u64,
+    current_ios: u64,
+    total_ticks: u64,
+    req_ticks: u64,
+    discard_ios: u64,
+    discard_merges: u64,
+    discard_sectors: u64,
+    discard_ticks: u64,
+    flush_ios: u64,
+    flush_ticks: u64,
+}
+
+#[derive(Debug, Default, Serialize, Deserialize)]
+pub struct DiskMetric {
+    collected_at: u64,
+    n_disks: usize,
+    offline: usize,
+    healing: usize,
+    life_time_ops: HashMap<String, u64>,
+    last_minute: HashMap<String, TimedAction>,
+    io_stats: DiskIOStats,
+}
+
+#[derive(Debug, Default, Serialize, Deserialize)]
+pub struct Metrics {}
+
+#[derive(Debug, Default, Serialize, Deserialize)]
+pub struct RealtimeMetrics {
+    errors: Vec<String>,
+    hosts: Vec<String>,
+    aggregated: Metrics,
+    by_host: HashMap<String, Metrics>,
+    by_disk: HashMap<String, DiskMetric>,
+    finally: bool,
+}
+
+#[derive(Debug, Default, Serialize, Deserialize)]
+pub struct CollectMetricsOpts {
+    hosts: HashSet<String>,
+    disks: HashSet<String>,
+    job_id: String,
+    dep_id: String,
+}
+
+pub type MetricType = u64;
+
+pub fn collect_local_metrics(_types: MetricType, _opts: &CollectMetricsOpts) -> RealtimeMetrics {
+    RealtimeMetrics::default()
+}