GitHub项目地址:https://github.com/PlutoaCharon/Golang_logCollect
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Golang实战之海量日志收集系统(一)项目背景介绍
Golang实战之海量日志收集系统(二)收集应用程序日志到Kafka中
Golang实战之海量日志收集系统(三)简单版本logAgent的实现
Golang实战之海量日志收集系统(四)etcd介绍与使用etcd获取配置信息
Golang实战之海量日志收集系统(五)根据etcd配置项创建多个tailTask
Golang实战之海量日志收集系统(六)监视etcd配置项的变更
Golang实战之海量日志收集系统(七)logTransfer之从kafka中获取日志信息
Golang实战之海量日志收集系统(八)logTransfer之将日志入库到Elasticsearch并通过Kibana进行展示
前面我们将logTransfor的配置初始化成功了, 下面将从Kafka中消费数据, 并将日志入库到Elasticsearch并通过Kibana进行展示
图源自 : https://www.cnblogs.com/zhaof/p/8948516.html
在main
函数中添加初始化InitEs
函数
// 初始化Es
err = es.InitEs(logConfig.EsAddr)
if err != nil {
logs.Error("初始化Elasticsearch失败, err:", err)
return
}
logs.Debug("初始化Es成功")
初始化Es
elasticsearch.go
package es
import (
"fmt"
"github.com/olivere/elastic/v7"
)
type Tweet struct {
User string
Message string
}
var (
esClient *elastic.Client
)
func InitEs(addr string) (err error) {
client, err := elastic.NewClient(elastic.SetSniff(false), elastic.SetURL(addr))
if err != nil {
fmt.Println("connect es error", err)
return nil
}
esClient = client
return
}
注意: Es的地址需要填写为
http://localhost:9200/
运行main函数
020/03/28 18:01:53.360 [D] 初始化日志模块成功
2020/03/28 18:01:53.374 [D] 初始化Kafka成功
2020/03/28 18:01:53.381 [D] 初始化Es成功
在main
函数中添加run
函数, 用于运行kafka消费数据到Es
// 运行
err = run()
if err != nil {
logs.Error("运行错误, err:", err)
return
}
run.go
package main
import (
"github.com/Shopify/sarama"
"github.com/astaxie/beego/logs"
)
func run() (err error) {
partitionList, err := kafkaClient.Client.Partitions(kafkaClient.Topic)
if err != nil {
logs.Error("Failed to get the list of partitions: ", err)
return
}
for partition := range partitionList {
pc, errRet := kafkaClient.Client.ConsumePartition(kafkaClient.Topic, int32(partition), sarama.OffsetNewest)
if errRet != nil {
err = errRet
logs.Error("Failed to start consumer for partition %d: %s\n", partition, err)
return
}
defer pc.AsyncClose()
go func(pc sarama.PartitionConsumer) {
kafkaClient.wg.Add(1)
for msg := range pc.Messages() {
logs.Debug("Partition:%d, Offset:%d, Key:%s, Value:%s", msg.Partition, msg.Offset, string(msg.Key), string(msg.Value))
err = es.SendToES(kafkaClient.topic, msg.Value)
if err != nil {
logs.Warn("send to es failed, err:%v", err)
}
}
kafkaClient.wg.Done()
}(pc)
}
kafkaClient.wg.Wait()
return
}
es.go
package es
import (
"context"
"fmt"
"github.com/olivere/elastic/v7"
)
type LogMessage struct {
App string
Topic string
Message string
}
var (
esClient *elastic.Client
)
func InitEs(addr string) (err error) {
client, err := elastic.NewClient(elastic.SetSniff(false), elastic.SetURL(addr))
if err != nil {
fmt.Println("connect es error", err)
return nil
}
esClient = client
return
}
func SendToES(topic string, data []byte) (err error) {
msg := &LogMessage{}
msg.Topic = topic
msg.Message = string(data)
_, err = esClient.Index().
Index(topic).
BodyJson(msg).
Do(context.Background())
if err != nil {
panic(err)
return
}
return
}
运行logAgent数据, 从etcd中读取日志配置, 经过Kafka生产
2020/03/28 20:25:17.581 [D] 导入日志成功&{debug E:\\Go\\logCollect\\logAgent\\logs\\my.log 100 0.0.0.0:9092 [] 0.0.0.0:2379 /backend/logagent/config/}
2020/03/28 20:25:17.589 [D] resp from etcd:[]
2020/03/28 20:25:17.590 [D] resp from etcd:[]
2020/03/28 20:25:17.590 [D] resp from etcd:[]
2020/03/28 20:25:17.591 [D] resp from etcd:[]
2020/03/28 20:25:17.613 [D] resp from etcd:[key:"/backend/logagent/config/192.168.0.11" create_revision:6 mod_revision:12 version:7 value:"[{\"logpath\":\"E:/nginx/logs/access.log\",\"topic\":\"nginx_log\"},{\"logpath\":\"E:/nginx/logs/error.log\",\"topic\":\"nginx_log_err\"},{\"logpath\":\"E:/nginx/logs/error2.log\",\"topic\":\"nginx_log_err2\"}]" ]
2020/03/28 20:25:17.613 [D] 日志设置为[{E:/nginx/logs/access.log nginx_log} {E:/nginx/logs/error.log nginx_log_err} {E:/nginx/logs/error2.log nginx_log_err2}]
2020/03/28 20:25:17.613 [D] resp from etcd:[]
2020/03/28 20:25:17.613 [D] 连接etcd成功
2020/03/28 20:25:17.613 [D] 初始化etcd成功!
2020/03/28 20:25:17.613 [D] 初始化tailf成功!
2020/03/28 20:25:17.613 [D] 开始监控key: /backend/logagent/config/192.168.0.1
2020/03/28 20:25:17.613 [D] 开始监控key: /backend/logagent/config/169.254.109.181
2020/03/28 20:25:17.614 [D] 开始监控key: /backend/logagent/config/192.168.106.1
2020/03/28 20:25:17.615 [D] 开始监控key: /backend/logagent/config/169.254.30.148
2020/03/28 20:25:17.616 [D] 开始监控key: /backend/logagent/config/169.254.153.68
2020/03/28 20:25:17.616 [D] 开始监控key: /backend/logagent/config/192.168.0.11
2020/03/28 20:25:17.617 [D] 初始化Kafka producer成功,地址为: 0.0.0.0:9092
2020/03/28 20:25:17.617 [D] 初始化Kafka成功!
2020/03/28 20:26:31.675 [D] get config from etcd ,Type: PUT, Key:/backend/logagent/config/192.168.0.11, Value:[{"logpath":"E:\\Go\\logCollect\\logAgent\\logs\\my.log","topic":"nginx_log"}]
2020/03/28 20:26:31.675 [D] get config from etcd success, [{E:\Go\logCollect\logAgent\logs\my.log nginx_log}]
2020/03/28 20:26:31.675 [W] tail obj 退出, 配置项为conf:{E:/nginx/logs/error2.log nginx_log_err2}
2020/03/28 20:26:31.675 [W] tail obj 退出, 配置项为conf:{E:/nginx/logs/access.log nginx_log}
2020/03/28 20:26:31.675 [W] tail obj 退出, 配置项为conf:{E:/nginx/logs/error.log nginx_log_err}
2020/03/28 20:26:31.947 [D] read success, pid:0, offset:34210, topic:nginx_log
2020/03/28 20:26:31.948 [D] read success, pid:0, offset:34211, topic:nginx_log
2020/03/28 20:26:32.177 [D] read success, pid:0, offset:34212, topic:nginx_log
2020/03/28 20:26:32.178 [D] read success, pid:0, offset:34213, topic:nginx_log
2020/03/28 20:26:32.180 [D] read success, pid:0, offset:34214, topic:nginx_log
2020/03/28 20:26:32.180 [D] read success, pid:0, offset:34215, topic:nginx_log
2020/03/28 20:26:32.427 [D] read success, pid:0, offset:34216, topic:nginx_log
2020/03/28 20:26:32.428 [D] read success, pid:0, offset:34217, topic:nginx_log
2020/03/28 20:26:32.430 [D] read success, pid:0, offset:34218, topic:nginx_log
2020/03/28 20:26:32.432 [D] read success, pid:0, offset:34219, topic:nginx_log
2020/03/28 20:26:32.432 [D] read success, pid:0, offset:34220, topic:nginx_log
2020/03/28 20:26:32.433 [D] read success, pid:0, offset:34221, topic:nginx_log
启动logTransfer
, 收集日志信息, 并将日志信息传入Es中
2020/03/28 20:29:17.109 [D] 初始化日志模块成功
2020/03/28 20:29:17.118 [D] 初始化Kafka成功
2020/03/28 20:29:17.120 [D] 初始化Es成功
2020/03/28 20:29:25.518 [D] Partition:0, Offset:153210, Key:, Value:2020/03/28 20:29:25.265 [D] 开始监控key: /backend/logagent/config/192.168.0.1
2020/03/28 20:29:27.361 [D] Partition:0, Offset:153211, Key:, Value:2020/03/28 20:29:25.265 [D] 开始监控key: /backend/logagent/config/169.254.30.148
2020/03/28 20:29:27.531 [D] Partition:0, Offset:153212, Key:, Value:2020/03/28 20:29:25.265 [D] 开始监控key: /backend/logagent/config/169.254.153.68
2020/03/28 20:29:27.743 [D] Partition:0, Offset:153213, Key:, Value:2020/03/28 20:29:25.266 [D] 开始监控key: /backend/logagent/config/192.168.0.11
2020/03/28 20:29:27.870 [D] Partition:0, Offset:153214, Key:, Value:2020/03/28 20:29:25.267 [D] 初始化Kafka producer成功,地址为: 0.0.0.0:9092
2020/03/28 20:29:28.012 [D] Partition:0, Offset:153215, Key:, Value:2020/03/28 20:29:25.267 [D] 初始化Kafka成功!
2020/03/28 20:29:28.191 [D] Partition:0, Offset:153216, Key:, Value:2020/03/28 20:29:25.518 [D] read success, pid:0, offset:153210, topic:nginx_log
2020/03/28 20:29:28.311 [D] Partition:0, Offset:153217, Key:, Value:
2020/03/28 20:29:28.456 [D] Partition:0, Offset:153218, Key:, Value:2020/03/28 20:29:25.521 [D] read success, pid:0, offset:153211, topic:nginx_log
2020/03/28 20:29:28.600 [D] Partition:0, Offset:153219, Key:, Value:
2020/03/28 20:29:28.744 [D] Partition:0, Offset:153220, Key:, Value:2020/03/28 20:29:25.522 [D] read success, pid:0, offset:153212, topic:nginx_log
打开http://localhost:5601/
kibana
添加刚才传入的Topic
为索引, 然后打开Discover
查看
已经能看到最新的数据了, 成功收集!