From: Lukas Wagner <l.wagner@proxmox.com>
To: pbs-devel@lists.proxmox.com
Subject: [pbs-devel] [PATCH proxmox-backup 13/13] api: add /status/metrics API
Date: Fri, 11 Oct 2024 12:51:37 +0200 [thread overview]
Message-ID: <20241011105137.131530-14-l.wagner@proxmox.com> (raw)
In-Reply-To: <20241011105137.131530-1-l.wagner@proxmox.com>
This one is modelled exactly as the one in PVE (there it
is available under /cluster/metrics/export).
The returned data format is quite simple, being an array of
metric records, including a value, a metric name, an id to identify
the object (e.g. datastore/foo, host), a timestamp and a type
('gauge', 'derive', ...). The latter property makes the format
self-describing and aids the metric collector in choosing a
representation for storing the metric data.
[
...
{
"metric": "cpu_avg1",
"value": 0.12,
"timestamp": 170053205,
"id": "host",
"type": "gauge"
},
...
]
In terms of permissions, the new endpoint requires Sys.Audit
on /system/status for metrics of the 'host' object,
and Datastore.Audit on /datastore/{store} for 'datastore/{store}'
metric objects.
Via the 'history' and 'start-time' parameters one can query
the last 30mins of metric history. If these parameters
are not provided, only the most recent metric generation
is returned.
Signed-off-by: Lukas Wagner <l.wagner@proxmox.com>
---
src/api2/mod.rs | 1 +
src/api2/status.rs | 13 ++++--
src/server/metric_collection/mod.rs | 4 +-
src/server/metric_collection/pull_metrics.rs | 45 ++++++++++++++++++++
4 files changed, 57 insertions(+), 6 deletions(-)
diff --git a/src/api2/mod.rs b/src/api2/mod.rs
index a83e4c20..f485ae53 100644
--- a/src/api2/mod.rs
+++ b/src/api2/mod.rs
@@ -9,6 +9,7 @@ pub mod admin;
pub mod backup;
pub mod config;
pub mod helpers;
+pub mod metrics;
pub mod node;
pub mod ping;
pub mod pull;
diff --git a/src/api2/status.rs b/src/api2/status.rs
index e46fc1ae..f217a31d 100644
--- a/src/api2/status.rs
+++ b/src/api2/status.rs
@@ -7,6 +7,7 @@ use proxmox_router::list_subdirs_api_method;
use proxmox_router::{ApiMethod, Permission, Router, RpcEnvironment, SubdirMap};
use proxmox_rrd_api_types::{RrdMode, RrdTimeframe};
use proxmox_schema::api;
+use proxmox_sortable_macro::sortable;
use pbs_api_types::{
Authid, DataStoreStatusListItem, Operation, PRIV_DATASTORE_AUDIT, PRIV_DATASTORE_BACKUP,
@@ -137,10 +138,14 @@ pub async fn datastore_status(
Ok(list)
}
-const SUBDIRS: SubdirMap = &[(
- "datastore-usage",
- &Router::new().get(&API_METHOD_DATASTORE_STATUS),
-)];
+#[sortable]
+const SUBDIRS: SubdirMap = &sorted!([
+ (
+ "datastore-usage",
+ &Router::new().get(&API_METHOD_DATASTORE_STATUS),
+ ),
+ ("metrics", &super::metrics::ROUTER),
+]);
pub const ROUTER: Router = Router::new()
.get(&list_subdirs_api_method!(SUBDIRS))
diff --git a/src/server/metric_collection/mod.rs b/src/server/metric_collection/mod.rs
index e6e04c5b..3cbd7425 100644
--- a/src/server/metric_collection/mod.rs
+++ b/src/server/metric_collection/mod.rs
@@ -17,8 +17,8 @@ use proxmox_sys::{
use crate::tools::disks::{zfs_dataset_stats, BlockDevStat, DiskManage};
mod metric_server;
-mod pull_metrics;
-pub mod rrd;
+pub(crate) mod pull_metrics;
+pub(crate) mod rrd;
const METRIC_COLLECTION_INTERVAL: Duration = Duration::from_secs(10);
diff --git a/src/server/metric_collection/pull_metrics.rs b/src/server/metric_collection/pull_metrics.rs
index f4b506cf..1b5f3777 100644
--- a/src/server/metric_collection/pull_metrics.rs
+++ b/src/server/metric_collection/pull_metrics.rs
@@ -39,6 +39,51 @@ pub(super) fn init() -> Result<(), Error> {
Ok(())
}
+/// Return most recent metrics
+///
+/// If the metric collection loop has no produced any metrics yet, an empty
+/// `Vec` is returned. Returns an error if the cache could not be accessed.
+pub fn get_most_recent_metrics() -> Result<Vec<MetricDataPoint>, Error> {
+ let cached_datapoints: Option<MetricDataPoints> = get_cache()?.get()?;
+ let mut points = cached_datapoints.map(|r| r.datapoints).unwrap_or_default();
+
+ points.sort_unstable_by_key(|p| p.timestamp);
+
+ Ok(points)
+}
+
+/// Return all cached metrics with a `timestamp > start_time`
+///
+/// If the metric collection loop has no produced any metrics yet, an empty
+/// `Vec` is returned. Returns an error if the cache could not be accessed.
+pub fn get_all_metrics(start_time: i64) -> Result<Vec<MetricDataPoint>, Error> {
+ let now = proxmox_time::epoch_i64();
+
+ let delta = now - start_time;
+
+ if delta < 0 {
+ // start-time in the future, no metrics for you
+ return Ok(Vec::new());
+ }
+
+ let generations = delta / (METRIC_COLLECTION_INTERVAL.as_secs() as i64);
+ let generations = generations.clamp(0, STORED_METRIC_GENERATIONS as i64);
+
+ let cached_datapoints: Vec<MetricDataPoints> = get_cache()?.get_last(generations as u32)?;
+
+ let mut points = Vec::new();
+
+ for gen in cached_datapoints {
+ if gen.timestamp > start_time {
+ points.extend(gen.datapoints);
+ }
+ }
+
+ points.sort_unstable_by_key(|p| p.timestamp);
+
+ Ok(points)
+}
+
/// Convert `DiskStat` `HostStat` into a universal metric data point and cache
/// them for a later retrieval.
pub(super) fn update_metrics(
--
2.39.5
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prev parent reply other threads:[~2024-10-11 10:51 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-11 10:51 [pbs-devel] [PATCH proxmox-backup 00/13] add metric endpoint Lukas Wagner
2024-10-11 10:51 ` [pbs-devel] [PATCH proxmox-backup 01/13] proxy: server: move rrd stat/metric server to separate module Lukas Wagner
2024-10-11 10:51 ` [pbs-devel] [PATCH proxmox-backup 02/13] metric collection: add doc comments for public functions Lukas Wagner
2024-10-11 10:51 ` [pbs-devel] [PATCH proxmox-backup 03/13] metric collection: move rrd_cache to new metric_collection module Lukas Wagner
2024-10-11 10:51 ` [pbs-devel] [PATCH proxmox-backup 04/13] metric_collection: split out push metric part Lukas Wagner
2024-10-11 10:51 ` [pbs-devel] [PATCH proxmox-backup 05/13] metric collection: rrd: move rrd update function to rrd module Lukas Wagner
2024-10-11 10:51 ` [pbs-devel] [PATCH proxmox-backup 06/13] metric collection: rrd: restrict function visibility Lukas Wagner
2024-10-11 10:51 ` [pbs-devel] [PATCH proxmox-backup 07/13] metric collection: rrd: remove rrd prefix from some function names Lukas Wagner
2024-10-11 10:51 ` [pbs-devel] [PATCH proxmox-backup 08/13] metric collection: drop std::path prefix where not needed Lukas Wagner
2024-10-11 10:51 ` [pbs-devel] [PATCH proxmox-backup 09/13] metric collection: move impl block for DiskStats to metric_server module Lukas Wagner
2024-10-11 10:51 ` [pbs-devel] [PATCH proxmox-backup 10/13] pbs-api-types: add types for the new metrics endpoint Lukas Wagner
2024-10-11 10:51 ` [pbs-devel] [PATCH proxmox-backup 11/13] metric collection: initialize metric cache on startup Lukas Wagner
2024-10-11 10:51 ` [pbs-devel] [PATCH proxmox-backup 12/13] metric collection: put metrics in a cache Lukas Wagner
2024-10-11 10:51 ` Lukas Wagner [this message]
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