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feat: Add Metrics V3 API (#19068)

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Metrics v3 is mainly a reorganization of metrics into smaller groups of
metrics and the removal of internal aggregation of metrics received from
peer nodes in a MinIO cluster.

This change adds the endpoint `/minio/metrics/v3` as the top-level metrics
endpoint and under this, various sub-endpoints are implemented. These
are currently documented in `docs/metrics/v3.md`

The handler will serve metrics at any path
`/minio/metrics/v3/PATH`, as follows:

when PATH is a sub-endpoint listed above => serves the group of
metrics under that path; or when PATH is a (non-empty) parent 
directory of the sub-endpoints listed above => serves metrics
from each child sub-endpoint of PATH. otherwise, returns a no 
resource found error

All available metrics are listed in the `docs/metrics/v3.md`. More will
be added subsequently.
This commit is contained in:
Aditya Manthramurthy
2024-03-10 01:15:15 -08:00
committed by GitHub
parent 2dfa9adc5d
commit b2c5b75efa
24 changed files with 2920 additions and 755 deletions
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8
cmd/data-usage-utils.go
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@@ -140,7 +140,7 @@ func (dui DataUsageInfo) tierStats() []madmin.TierInfo {
return infos
}
func (dui DataUsageInfo) tierMetrics() (metrics []Metric) {
func (dui DataUsageInfo) tierMetrics() (metrics []MetricV2) {
if dui.TierStats == nil {
return nil
}
@@ -148,17 +148,17 @@ func (dui DataUsageInfo) tierMetrics() (metrics []Metric) {
// minio_cluster_ilm_transitioned_objects{tier="S3TIER-1"}=1
// minio_cluster_ilm_transitioned_versions{tier="S3TIER-1"}=3
for tier, st := range dui.TierStats.Tiers {
metrics = append(metrics, Metric{
metrics = append(metrics, MetricV2{
Description: getClusterTransitionedBytesMD(),
Value: float64(st.TotalSize),
VariableLabels: map[string]string{"tier": tier},
})
metrics = append(metrics, Metric{
metrics = append(metrics, MetricV2{
Description: getClusterTransitionedObjectsMD(),
Value: float64(st.NumObjects),
VariableLabels: map[string]string{"tier": tier},
})
metrics = append(metrics, Metric{
metrics = append(metrics, MetricV2{
Description: getClusterTransitionedVersionsMD(),
Value: float64(st.NumVersions),
VariableLabels: map[string]string{"tier": tier},