/
perf_schema_replication_applier_status_by_worker.go
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/
perf_schema_replication_applier_status_by_worker.go
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// Copyright 2019 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.
package collector
import (
"context"
"database/sql"
"time"
"github.com/go-kit/log"
"github.com/prometheus/client_golang/prometheus"
)
const perfReplicationApplierStatsByWorkerQuery = `
SELECT
CHANNEL_NAME,
WORKER_ID,
LAST_APPLIED_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP,
LAST_APPLIED_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP,
LAST_APPLIED_TRANSACTION_START_APPLY_TIMESTAMP,
LAST_APPLIED_TRANSACTION_END_APPLY_TIMESTAMP,
APPLYING_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP,
APPLYING_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP,
APPLYING_TRANSACTION_START_APPLY_TIMESTAMP
FROM performance_schema.replication_applier_status_by_worker
`
const timeLayout = "2006-01-02 15:04:05.000000"
// Metric descriptors.
var (
performanceSchemaReplicationApplierStatsByWorkerLastAppliedTransactionOriginalCommitSecondDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "last_applied_transaction_original_commit_timestamp_seconds"),
"A timestamp shows when the last transaction applied by this worker was committed on the original master.",
[]string{"channel_name", "member_id"}, nil,
)
performanceSchemaReplicationApplierStatsByWorkerLastAppliedTransactionImmediateCommitSecondDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "last_applied_transaction_immediate_commit_timestamp_seconds"),
"A timestamp shows when the last transaction applied by this worker was committed on the immediate master.",
[]string{"channel_name", "member_id"}, nil,
)
performanceSchemaReplicationApplierStatsByWorkerLastAppliedTransactionStartApplySecondDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "last_applied_transaction_start_apply_timestamp_seconds"),
"A timestamp shows when this worker started applying the last applied transaction.",
[]string{"channel_name", "member_id"}, nil,
)
performanceSchemaReplicationApplierStatsByWorkerLastAppliedTransactionEndApplySecondDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "last_applied_transaction_end_apply_timestamp_seconds"),
"A shows when this worker finished applying the last applied transaction.",
[]string{"channel_name", "member_id"}, nil,
)
performanceSchemaReplicationApplierStatsByWorkerApplyingTransactionOriginalCommitSecondDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "applying_transaction_original_commit_timestamp_seconds"),
"A timestamp that shows when the transaction this worker is currently applying was committed on the original master.",
[]string{"channel_name", "member_id"}, nil,
)
performanceSchemaReplicationApplierStatsByWorkerApplyingTransactionImmediateCommitSecondDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "applying_transaction_immediate_commit_timestamp_seconds"),
"A timestamp shows when the transaction this worker is currently applying was committed on the immediate master.",
[]string{"channel_name", "member_id"}, nil,
)
performanceSchemaReplicationApplierStatsByWorkerApplyingTransactionStartApplySecondDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "applying_transaction_start_apply_timestamp_seconds"),
"A timestamp shows when this worker started its first attempt to apply the transaction that is currently being applied.",
[]string{"channel_name", "member_id"}, nil,
)
)
// ScrapePerfReplicationApplierStatsByWorker collects from `performance_schema.replication_applier_status_by_worker`.
type ScrapePerfReplicationApplierStatsByWorker struct{}
// Name of the Scraper. Should be unique.
func (ScrapePerfReplicationApplierStatsByWorker) Name() string {
return performanceSchema + ".replication_applier_status_by_worker"
}
// Help describes the role of the Scraper.
func (ScrapePerfReplicationApplierStatsByWorker) Help() string {
return "Collect metrics from performance_schema.replication_applier_status_by_worker"
}
// Version of MySQL from which scraper is available.
func (ScrapePerfReplicationApplierStatsByWorker) Version() float64 {
return 5.7
}
// Scrape collects data from database connection and sends it over channel as prometheus metric.
func (ScrapePerfReplicationApplierStatsByWorker) Scrape(ctx context.Context, db *sql.DB, ch chan<- prometheus.Metric, logger log.Logger) error {
perfReplicationApplierStatsByWorkerRows, err := db.QueryContext(ctx, perfReplicationApplierStatsByWorkerQuery)
if err != nil {
return err
}
defer perfReplicationApplierStatsByWorkerRows.Close()
var (
channelName, workerId string
lastAppliedTransactionOriginalCommit, lastAppliedTransactionImmediateCommit string
lastAppliedTransactionStartApply, lastAppliedTransactionEndApply string
applyingTransactionOriginalCommit, applyingTransactionImmediateCommit string
applyingTransactionStartApply string
lastAppliedTransactionOriginalCommitSeconds, lastAppliedTransactionImmediateCommitSeconds float64
lastAppliedTransactionStartApplySeconds, lastAppliedTransactionEndApplySeconds float64
applyingTransactionOriginalCommitSeconds, applyingTransactionImmediateCommitSeconds float64
applyingTransactionStartApplySeconds float64
)
for perfReplicationApplierStatsByWorkerRows.Next() {
if err := perfReplicationApplierStatsByWorkerRows.Scan(
&channelName, &workerId,
&lastAppliedTransactionOriginalCommit, &lastAppliedTransactionImmediateCommit,
&lastAppliedTransactionStartApply, &lastAppliedTransactionEndApply,
&applyingTransactionOriginalCommit, &applyingTransactionImmediateCommit,
&applyingTransactionStartApply,
); err != nil {
return err
}
lastAppliedTransactionOriginalCommitTime, err := time.Parse(timeLayout, lastAppliedTransactionOriginalCommit)
if err != nil {
lastAppliedTransactionOriginalCommitTime = time.Time{}
}
// Check if the value is 0, use a real 0
if !lastAppliedTransactionOriginalCommitTime.IsZero() {
lastAppliedTransactionOriginalCommitSeconds = float64(lastAppliedTransactionOriginalCommitTime.UnixNano()) / 1e9
} else {
lastAppliedTransactionOriginalCommitSeconds = 0
}
ch <- prometheus.MustNewConstMetric(
performanceSchemaReplicationApplierStatsByWorkerLastAppliedTransactionOriginalCommitSecondDesc,
prometheus.GaugeValue, lastAppliedTransactionOriginalCommitSeconds, channelName, workerId,
)
lastAppliedTransactionImmediateCommitTime, err := time.Parse(timeLayout, lastAppliedTransactionImmediateCommit)
if err != nil {
lastAppliedTransactionImmediateCommitTime = time.Time{}
}
if !lastAppliedTransactionImmediateCommitTime.IsZero() {
lastAppliedTransactionImmediateCommitSeconds = float64(lastAppliedTransactionImmediateCommitTime.UnixNano()) / 1e9
} else {
lastAppliedTransactionImmediateCommitSeconds = 0
}
ch <- prometheus.MustNewConstMetric(
performanceSchemaReplicationApplierStatsByWorkerLastAppliedTransactionImmediateCommitSecondDesc,
prometheus.GaugeValue, lastAppliedTransactionImmediateCommitSeconds, channelName, workerId,
)
lastAppliedTransactionStartApplyTime, err := time.Parse(timeLayout, lastAppliedTransactionStartApply)
if err != nil {
lastAppliedTransactionStartApplyTime = time.Time{}
}
if !lastAppliedTransactionStartApplyTime.IsZero() {
lastAppliedTransactionStartApplySeconds = float64(lastAppliedTransactionStartApplyTime.UnixNano()) / 1e9
} else {
lastAppliedTransactionStartApplySeconds = 0
}
ch <- prometheus.MustNewConstMetric(
performanceSchemaReplicationApplierStatsByWorkerLastAppliedTransactionStartApplySecondDesc,
prometheus.GaugeValue, lastAppliedTransactionStartApplySeconds, channelName, workerId,
)
lastAppliedTransactionEndApplyTime, err := time.Parse(timeLayout, lastAppliedTransactionEndApply)
if err != nil {
lastAppliedTransactionEndApplyTime = time.Time{}
}
if !lastAppliedTransactionEndApplyTime.IsZero() {
lastAppliedTransactionEndApplySeconds = float64(lastAppliedTransactionEndApplyTime.UnixNano()) / 1e9
} else {
lastAppliedTransactionEndApplySeconds = 0
}
ch <- prometheus.MustNewConstMetric(
performanceSchemaReplicationApplierStatsByWorkerLastAppliedTransactionEndApplySecondDesc,
prometheus.GaugeValue, lastAppliedTransactionEndApplySeconds, channelName, workerId,
)
applyingTransactionOriginalCommitTime, err := time.Parse(timeLayout, applyingTransactionOriginalCommit)
if err != nil {
applyingTransactionOriginalCommitTime = time.Time{}
}
if !applyingTransactionOriginalCommitTime.IsZero() {
applyingTransactionOriginalCommitSeconds = float64(applyingTransactionOriginalCommitTime.UnixNano()) / 1e9
} else {
applyingTransactionOriginalCommitSeconds = 0
}
ch <- prometheus.MustNewConstMetric(
performanceSchemaReplicationApplierStatsByWorkerApplyingTransactionOriginalCommitSecondDesc,
prometheus.GaugeValue, applyingTransactionOriginalCommitSeconds, channelName, workerId,
)
applyingTransactionImmediateCommitTime, err := time.Parse(timeLayout, applyingTransactionImmediateCommit)
if err != nil {
applyingTransactionImmediateCommitTime = time.Time{}
}
if !applyingTransactionImmediateCommitTime.IsZero() {
applyingTransactionImmediateCommitSeconds = float64(applyingTransactionImmediateCommitTime.UnixNano()) / 1e9
} else {
applyingTransactionImmediateCommitSeconds = 0
}
ch <- prometheus.MustNewConstMetric(
performanceSchemaReplicationApplierStatsByWorkerApplyingTransactionImmediateCommitSecondDesc,
prometheus.GaugeValue, applyingTransactionImmediateCommitSeconds, channelName, workerId,
)
applyingTransactionStartApplyTime, err := time.Parse(timeLayout, applyingTransactionStartApply)
if err != nil {
applyingTransactionStartApplyTime = time.Time{}
}
if !applyingTransactionStartApplyTime.IsZero() {
applyingTransactionStartApplySeconds = float64(applyingTransactionStartApplyTime.UnixNano()) / 1e9
} else {
applyingTransactionStartApplySeconds = 0
}
ch <- prometheus.MustNewConstMetric(
performanceSchemaReplicationApplierStatsByWorkerApplyingTransactionStartApplySecondDesc,
prometheus.GaugeValue, applyingTransactionStartApplySeconds, channelName, workerId,
)
}
return nil
}
// check interface
var _ Scraper = ScrapePerfReplicationApplierStatsByWorker{}