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lib/httpserver: export vm_available_memory_bytes and vm_available_cpu_cores metrics

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These metrics are useful for tracking the available memory and CPU cores for VictoriaMetrics apps.
This commit is contained in:
Aliaksandr Valialkin 2021-03-10 12:01:18 +02:00
parent 933de6b9b1
commit bd8b7a88a7
2 changed files with 4 additions and 0 deletions
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1
docs/CHANGELOG.md
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@ -7,6 +7,7 @@
- `histogram_stdvar(buckets)` - returns standard variance for the given buckets. - `histogram_stdvar(buckets)` - returns standard variance for the given buckets.
- `histogram_stddev(buckets)` - returns standard deviation for the given buckets. - `histogram_stddev(buckets)` - returns standard deviation for the given buckets.
* FEATURE: reduce median query duration by up to 2x. See https://github.com/VictoriaMetrics/VictoriaMetrics/commit/18fe0ff14bc78860c5569e2b70de1db78fac61be * FEATURE: reduce median query duration by up to 2x. See https://github.com/VictoriaMetrics/VictoriaMetrics/commit/18fe0ff14bc78860c5569e2b70de1db78fac61be
* FEATURE: export `vm_available_memory_bytes` and `vm_available_cpu_cores` metrics, which show the number of available RAM and available CPU cores for VictoriaMetrics apps.
* FEATURE: vmagent: add ability to replicate scrape targets among `vmagent` instances in the cluster with `-promscrape.cluster.replicationFactor` command-line flag. See [these docs](https://victoriametrics.github.io/vmagent.html#scraping-big-number-of-targets). * FEATURE: vmagent: add ability to replicate scrape targets among `vmagent` instances in the cluster with `-promscrape.cluster.replicationFactor` command-line flag. See [these docs](https://victoriametrics.github.io/vmagent.html#scraping-big-number-of-targets).
* FATURE: vmagent: accept `scrape_offset` option at `scrape_config`. This option may be useful when scrapes must start at the specified offset of every scrape interval. See [these docs](https://victoriametrics.github.io/vmagent.html#troubleshooting) for details. * FATURE: vmagent: accept `scrape_offset` option at `scrape_config`. This option may be useful when scrapes must start at the specified offset of every scrape interval. See [these docs](https://victoriametrics.github.io/vmagent.html#troubleshooting) for details.
* FEATURE: vmauth: allow using regexp paths in `url_map`. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1112) for details. * FEATURE: vmauth: allow using regexp paths in `url_map`. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1112) for details.

3
lib/httpserver/metrics.go
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@ -12,6 +12,7 @@ import (
"github.com/VictoriaMetrics/VictoriaMetrics/lib/buildinfo" "github.com/VictoriaMetrics/VictoriaMetrics/lib/buildinfo"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil" "github.com/VictoriaMetrics/VictoriaMetrics/lib/bytesutil"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/cgroup"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil" "github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/memory" "github.com/VictoriaMetrics/VictoriaMetrics/lib/memory"
"github.com/VictoriaMetrics/metrics" "github.com/VictoriaMetrics/metrics"
@ -48,6 +49,8 @@ func writePrometheusMetrics(w io.Writer) {
fmt.Fprintf(w, "vm_app_version{version=%q, short_version=%q} 1\n", buildinfo.Version, fmt.Fprintf(w, "vm_app_version{version=%q, short_version=%q} 1\n", buildinfo.Version,
versionRe.FindString(buildinfo.Version)) versionRe.FindString(buildinfo.Version))
fmt.Fprintf(w, "vm_allowed_memory_bytes %d\n", memory.Allowed()) fmt.Fprintf(w, "vm_allowed_memory_bytes %d\n", memory.Allowed())
fmt.Fprintf(w, "vm_available_memory_bytes %d\n", memory.Allowed()+memory.Remaining())
fmt.Fprintf(w, "vm_available_cpu_cores %d\n", cgroup.AvailableCPUs())
// Export start time and uptime in seconds // Export start time and uptime in seconds
fmt.Fprintf(w, "vm_app_start_timestamp %d\n", startTime.Unix()) fmt.Fprintf(w, "vm_app_start_timestamp %d\n", startTime.Unix())