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info.go
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info.go
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// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 info
import (
"strconv"
"github.com/pkg/errors"
"github.com/elastic/beats/v7/metricbeat/mb"
"github.com/elastic/beats/v7/metricbeat/mb/parse"
"github.com/elastic/beats/v7/metricbeat/module/redis"
)
var hostParser = parse.URLHostParserBuilder{DefaultScheme: "redis"}.Build()
func init() {
mb.Registry.MustAddMetricSet("redis", "info", New,
mb.WithHostParser(hostParser),
mb.DefaultMetricSet(),
)
}
// MetricSet for fetching Redis server information and statistics.
type MetricSet struct {
*redis.MetricSet
}
// New creates new instance of MetricSet
func New(base mb.BaseMetricSet) (mb.MetricSet, error) {
ms, err := redis.NewMetricSet(base)
if err != nil {
return nil, errors.Wrap(err, "failed to create 'info' metricset")
}
return &MetricSet{ms}, nil
}
// Fetch fetches metrics from Redis by issuing the INFO command.
func (m *MetricSet) Fetch(r mb.ReporterV2) error {
conn := m.Connection()
defer func() {
if err := conn.Close(); err != nil {
m.Logger().Debug(errors.Wrapf(err, "failed to release connection"))
}
}()
// Fetch all INFO.
info, err := redis.FetchRedisInfo("all", conn)
if err != nil {
return errors.Wrap(err, "failed to fetch redis info")
}
// In 5.0 some fields are renamed, maintain both names, old ones will be deprecated
renamings := []struct {
old, new string
}{
{"client_longest_output_list", "client_recent_max_output_buffer"},
{"client_biggest_input_buf", "client_recent_max_input_buffer"},
}
for _, r := range renamings {
if v, ok := info[r.old]; ok {
info[r.new] = v
delete(info, r.old)
}
}
slowLogLength, err := redis.FetchSlowLogLength(conn)
if err != nil {
return errors.Wrap(err, "failed to fetch slow log length")
}
info["slowlog_len"] = strconv.FormatInt(slowLogLength, 10)
m.Logger().Debugf("Redis INFO from %s: %+v", m.Host(), info)
eventMapping(r, info)
return nil
}