youtubebeat/vendor/github.com/elastic/beats/metricbeat/module/redis/redis.go

105 lines
2.8 KiB
Go

// 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 redis contains shared Redis functionality for the metric sets
*/
package redis
import (
"strings"
"time"
"github.com/elastic/beats/libbeat/logp"
rd "github.com/garyburd/redigo/redis"
)
// ParseRedisInfo parses the string returned by the INFO command
// Every line is split up into key and value
func ParseRedisInfo(info string) map[string]string {
// Feed every line into
result := strings.Split(info, "\r\n")
// Load redis info values into array
values := map[string]string{}
for _, value := range result {
// Values are separated by :
parts := ParseRedisLine(value, ":")
if len(parts) == 2 {
values[parts[0]] = parts[1]
}
}
return values
}
// ParseRedisLine parses a single line returned by INFO
func ParseRedisLine(s string, delimiter string) []string {
return strings.Split(s, delimiter)
}
// FetchRedisInfo returns a map of requested stats.
func FetchRedisInfo(stat string, c rd.Conn) (map[string]string, error) {
defer c.Close()
out, err := rd.String(c.Do("INFO", stat))
if err != nil {
logp.Err("Error retrieving INFO stats: %v", err)
return nil, err
}
return ParseRedisInfo(out), nil
}
// FetchSlowLogLength returns count of slow operations
func FetchSlowLogLength(c rd.Conn) (int64, error) {
count, err := rd.Int64(c.Do("SLOWLOG", "len"))
if err != nil {
logp.Err("Error retrieving slowlog len: %v", err)
return 0, err
}
return count, nil
}
// CreatePool creates a redis connection pool
func CreatePool(
host, password, network string,
maxConn int,
idleTimeout, connTimeout time.Duration,
) *rd.Pool {
return &rd.Pool{
MaxIdle: maxConn,
IdleTimeout: idleTimeout,
Dial: func() (rd.Conn, error) {
c, err := rd.Dial(network, host,
rd.DialConnectTimeout(connTimeout),
rd.DialReadTimeout(connTimeout),
rd.DialWriteTimeout(connTimeout))
if err != nil {
return nil, err
}
if password != "" {
if _, err := c.Do("AUTH", password); err != nil {
c.Close()
return nil, err
}
}
return c, err
},
}
}