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Files
mysqld_exporter/collector/perf_schema_file_instances.go
TJ Hoplock be5dc65671 chore!: adopt log/slog, drop go-kit/log (#875)
* chore!: adopt log/slog, drop go-kit/log

Requires: prometheus/common#697

This PR includes:
- linter updates to enable `sloglint` linter
- Go dep updates for prometheus/{client_golang,common,exporter-toolkit}
  libs
- refactorings to adopt log/slog in favor of go-kit/log

The bulk of this PR was automated by the following script which is being
used to aid in converting the various exporters/projects to use slog:

https://gist.github.com/tjhop/49f96fb7ebbe55b12deee0b0312d8434

Builds and passes tests locally with go workspaces and up-to-date main
branch of prometheus/common.

Signed-off-by: TJ Hoplock <t.hoplock@gmail.com>

* build(deps): bump prometheus/common to v0.60.0

Signed-off-by: TJ Hoplock <t.hoplock@gmail.com>

---------

Signed-off-by: TJ Hoplock <t.hoplock@gmail.com>
2024-10-10 18:04:21 +02:00

130 lines
4.2 KiB
Go

// Copyright 2018 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Scrape `performance_schema.file_summary_by_instance`.
package collector
import (
"context"
"log/slog"
"strings"
"github.com/alecthomas/kingpin/v2"
"github.com/prometheus/client_golang/prometheus"
)
const perfFileInstancesQuery = `
SELECT
FILE_NAME, EVENT_NAME,
COUNT_READ, COUNT_WRITE,
SUM_NUMBER_OF_BYTES_READ, SUM_NUMBER_OF_BYTES_WRITE
FROM performance_schema.file_summary_by_instance
where FILE_NAME REGEXP ?
`
// Tunable flags.
var (
performanceSchemaFileInstancesFilter = kingpin.Flag(
"collect.perf_schema.file_instances.filter",
"RegEx file_name filter for performance_schema.file_summary_by_instance",
).Default(".*").String()
performanceSchemaFileInstancesRemovePrefix = kingpin.Flag(
"collect.perf_schema.file_instances.remove_prefix",
"Remove path prefix in performance_schema.file_summary_by_instance",
).Default("/var/lib/mysql/").String()
)
// Metric descriptors.
var (
performanceSchemaFileInstancesBytesDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "file_instances_bytes"),
"The number of bytes processed by file read/write operations.",
[]string{"file_name", "event_name", "mode"}, nil,
)
performanceSchemaFileInstancesCountDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "file_instances_total"),
"The total number of file read/write operations.",
[]string{"file_name", "event_name", "mode"}, nil,
)
)
// ScrapePerfFileInstances collects from `performance_schema.file_summary_by_instance`.
type ScrapePerfFileInstances struct{}
// Name of the Scraper. Should be unique.
func (ScrapePerfFileInstances) Name() string {
return "perf_schema.file_instances"
}
// Help describes the role of the Scraper.
func (ScrapePerfFileInstances) Help() string {
return "Collect metrics from performance_schema.file_summary_by_instance"
}
// Version of MySQL from which scraper is available.
func (ScrapePerfFileInstances) Version() float64 {
return 5.5
}
// Scrape collects data from database connection and sends it over channel as prometheus metric.
func (ScrapePerfFileInstances) Scrape(ctx context.Context, instance *instance, ch chan<- prometheus.Metric, logger *slog.Logger) error {
db := instance.getDB()
// Timers here are returned in picoseconds.
perfSchemaFileInstancesRows, err := db.QueryContext(ctx, perfFileInstancesQuery, *performanceSchemaFileInstancesFilter)
if err != nil {
return err
}
defer perfSchemaFileInstancesRows.Close()
var (
fileName, eventName string
countRead, countWrite uint64
sumBytesRead, sumBytesWritten uint64
)
for perfSchemaFileInstancesRows.Next() {
if err := perfSchemaFileInstancesRows.Scan(
&fileName, &eventName,
&countRead, &countWrite,
&sumBytesRead, &sumBytesWritten,
); err != nil {
return err
}
fileName = strings.TrimPrefix(fileName, *performanceSchemaFileInstancesRemovePrefix)
ch <- prometheus.MustNewConstMetric(
performanceSchemaFileInstancesCountDesc, prometheus.CounterValue, float64(countRead),
fileName, eventName, "read",
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaFileInstancesCountDesc, prometheus.CounterValue, float64(countWrite),
fileName, eventName, "write",
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaFileInstancesBytesDesc, prometheus.CounterValue, float64(sumBytesRead),
fileName, eventName, "read",
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaFileInstancesBytesDesc, prometheus.CounterValue, float64(sumBytesWritten),
fileName, eventName, "write",
)
}
return nil
}
// check interface
var _ Scraper = ScrapePerfFileInstances{}