[pbs-devel] [PATCH proxmox-backup v9 4/7] proxmox-backup-proxy: send metrics to configured metrics server

[Dominik Csapak <d.csapak@proxmox.com>]

and keep the data as similar as possible to pve (tags/fields)

datastores get their own 'object' type and reside in the "blockstat"
measurement

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
 src/bin/proxmox-backup-proxy.rs | 138 ++++++++++++++++++++++++++++++--
 1 file changed, 131 insertions(+), 7 deletions(-)

diff --git a/src/bin/proxmox-backup-proxy.rs b/src/bin/proxmox-backup-proxy.rs
index 8ca2ff49..b905de8c 100644
--- a/src/bin/proxmox-backup-proxy.rs
+++ b/src/bin/proxmox-backup-proxy.rs
@@ -19,6 +19,7 @@ use tokio_stream::wrappers::ReceiverStream;
 
 use proxmox_http::client::{RateLimitedStream, ShareableRateLimit};
 use proxmox_lang::try_block;
+use proxmox_metrics::MetricsData;
 use proxmox_router::{RpcEnvironment, RpcEnvironmentType, UserInformation};
 use proxmox_sys::fs::{CreateOptions, FileSystemInformation};
 use proxmox_sys::linux::{
@@ -28,6 +29,7 @@ use proxmox_sys::linux::{
 use proxmox_sys::logrotate::LogRotate;
 use proxmox_sys::{task_log, task_warn};
 
+use pbs_config::metrics::get_metric_server_connections;
 use pbs_datastore::DataStore;
 
 use proxmox_rest_server::{
@@ -1009,19 +1011,121 @@ async fn run_stat_generator() {
             }
         };
 
-        if let Err(err) = tokio::task::spawn_blocking(move || {
-            rrd_update_host_stats_sync(&stats.0, &stats.1, &stats.2);
-            rrd_sync_journal();
-        })
-        .await
-        {
-            log::error!("updating rrd panicked: {}", err);
+        let rrd_future = tokio::task::spawn_blocking({
+            let stats = Arc::clone(&stats);
+            move || {
+                rrd_update_host_stats_sync(&stats.0, &stats.1, &stats.2);
+                rrd_sync_journal();
+            }
+        });
+
+        let metrics_future = send_data_to_metric_servers(stats);
+
+        let (rrd_res, metrics_res) = join!(rrd_future, metrics_future);
+        if let Err(err) = rrd_res {
+            log::error!("rrd update panicked: {}", err);
+        }
+        if let Err(err) = metrics_res {
+            log::error!("error during metrics sending: {}", err);
         }
 
         tokio::time::sleep_until(tokio::time::Instant::from_std(delay_target)).await;
     }
 }
 
+async fn send_data_to_metric_servers(
+    stats: Arc<(HostStats, DiskStat, Vec<DiskStat>)>,
+) -> Result<(), Error> {
+    let (config, _digest) = pbs_config::metrics::config()?;
+    let channel_list = get_metric_server_connections(config)?;
+
+    if channel_list.is_empty() {
+        return Ok(());
+    }
+
+    let ctime = proxmox_time::epoch_i64();
+    let nodename = proxmox_sys::nodename();
+
+    let mut values = Vec::new();
+
+    let mut cpuvalue = match &stats.0.proc {
+        Some(stat) => serde_json::to_value(stat)?,
+        None => json!({}),
+    };
+
+    if let Some(loadavg) = &stats.0.load {
+        cpuvalue["avg1"] = Value::from(loadavg.0);
+        cpuvalue["avg5"] = Value::from(loadavg.1);
+        cpuvalue["avg15"] = Value::from(loadavg.2);
+    }
+
+    values.push(Arc::new(
+        MetricsData::new("cpustat", ctime, cpuvalue)?
+            .tag("object", "host")
+            .tag("host", nodename),
+    ));
+
+    if let Some(stat) = &stats.0.meminfo {
+        values.push(Arc::new(
+            MetricsData::new("memory", ctime, stat)?
+                .tag("object", "host")
+                .tag("host", nodename),
+        ));
+    }
+
+    if let Some(netdev) = &stats.0.net {
+        for item in netdev {
+            values.push(Arc::new(
+                MetricsData::new("nics", ctime, item)?
+                    .tag("object", "host")
+                    .tag("host", nodename)
+                    .tag("instance", item.device.clone()),
+            ));
+        }
+    }
+
+    values.push(Arc::new(
+        MetricsData::new("blockstat", ctime, stats.1.to_value())?
+            .tag("object", "host")
+            .tag("host", nodename),
+    ));
+
+    for datastore in stats.2.iter() {
+        values.push(Arc::new(
+            MetricsData::new("blockstat", ctime, datastore.to_value())?
+                .tag("object", "host")
+                .tag("host", nodename)
+                .tag("datastore", datastore.name.clone()),
+        ));
+    }
+
+    // we must have a concrete functions, because the inferred lifetime from a
+    // closure is not general enough for the tokio::spawn call we are in here...
+    fn map_fn(item: &(proxmox_metrics::Metrics, String)) -> &proxmox_metrics::Metrics {
+        &item.0
+    }
+
+    let results =
+        proxmox_metrics::send_data_to_channels(&values, channel_list.iter().map(map_fn)).await;
+    for (res, name) in results
+        .into_iter()
+        .zip(channel_list.iter().map(|(_, name)| name))
+    {
+        if let Err(err) = res {
+            log::error!("error sending into channel of {}: {}", name, err);
+        }
+    }
+
+    futures::future::join_all(channel_list.into_iter().map(|(channel, name)| async move {
+        if let Err(err) = channel.join().await {
+            log::error!("error sending to metric server {}: {}", name, err);
+        }
+    }))
+    .await;
+
+    Ok(())
+}
+
 struct HostStats {
     proc: Option<ProcFsStat>,
     meminfo: Option<ProcFsMemInfo>,
@@ -1035,6 +1139,26 @@ struct DiskStat {
     dev: Option<BlockDevStat>,
 }
 
+impl DiskStat {
+    fn to_value(&self) -> Value {
+        let mut value = json!({});
+        if let Some(usage) = &self.usage {
+            value["total"] = Value::from(usage.total);
+            value["used"] = Value::from(usage.used);
+            value["avail"] = Value::from(usage.available);
+        }
+
+        if let Some(dev) = &self.dev {
+            value["read_ios"] = Value::from(dev.read_ios);
+            value["read_bytes"] = Value::from(dev.read_sectors * 512);
+            value["write_ios"] = Value::from(dev.write_ios);
+            value["write_bytes"] = Value::from(dev.write_sectors * 512);
+            value["io_ticks"] = Value::from(dev.io_ticks / 1000);
+        }
+        value
+    }
+}
+
 fn collect_host_stats_sync() -> HostStats {
     use proxmox_sys::linux::procfs::{
         read_loadavg, read_meminfo, read_proc_net_dev, read_proc_stat,
-- 
2.30.2