场景：与redis作为缓存服务器相比，虽然利用redis 可以实现elasticsearch 缓存功能,减轻elasticsearch的压力,但不支持的redis集群，存在单点问题，故利用kafka代替redis，且支持kafka集群，消除单点故障隐患，同时利用 kafka 缓存日志数据，解决应用解耦，异步消息，流量削锋等问题

大致流程：将nginx 服务器（web-filebeat）的日志通过filebeat收集之后，存储到缓存服务器kafka，之后logstash到kafka服务器上取出相应日志，经过处理后写入到elasticsearch服务器并在kibala上展示。

官方文档：

https://www.elastic.co/guide/en/logstash/current/plugins-inputs-redis.html

https://www.elastic.co/guide/en/logstash/current/plugins-outputs-redis.html

部署Nginx服务配置Json格式的访问日志

#包安装

[root@elk-web1 ~]#apt update && apt -y install nginx

​

#修改nginx访问日志为Json格式

[root@elk-web1 ~]#vim /etc/nginx/nginx.conf

.......................

log_format access_json '{"@timestamp":"$time_iso8601",'

'"host":"$server_addr",'

'"clientip":"$remote_addr",'

'"size":$body_bytes_sent,'

'"responsetime":$request_time,'

'"upstreamtime":"$upstream_response_time",'

'"upstreamhost":"$upstream_addr",'

'"http_host":"$host",'

'"uri":"$uri",'

'"domain":"$host",'

'"xff":"$http_x_forwarded_for",'

'"referer":"$http_referer",'

'"tcp_xff":"$proxy_protocol_addr",'

'"http_user_agent":"$http_user_agent",'

'"status":"$status"}';

​

access_log /var/log/nginx/access_json.log access_json ;

error_log /var/log/nginx/error.log;

.........................

​

#默认开启nginx的错误日志,但如果是ubuntu,还需要修改下面行才能记录错误日志

[root@elk-web1 ~]#vim /etc/nginx/sites-available/default

location / {

First attempt to serve request as file, then

as directory, then fall back to displaying a 404.

#try_files $uri $uri/ =404; #将此行注释

​

[root@elk-web1 ~]#systemctl restart nginx

部署kafka

这里我采用脚本一键部署方式，脚本如下

[root@ubuntu2204 ~]#hostnamectl set-hostname kafka-node1

[root@ubuntu2204 ~]#hostnamectl set-hostname kafka-node2

[root@ubuntu2204 ~]#hostnamectl set-hostname kafka-node3

​

[root@kafka-node1 ~]#cat install_kafka.sh

#!/bin/bash

​

KAFKA_VERSION=3.3.2

SCALA_VERSION=2.13

KAFKA_URL="https://mirrors.tuna.tsinghua.edu.cn/apache/kafka/${KAFKA_VERSION}/kafka_${SCALA_VERSION}-${KAFKA_VERSION}.tgz"

ZK_VERSOIN=3.7.1

ZK_URL="https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/stable/apache-zookeeper-${ZK_VERSOIN}-bin.tar.gz"

​

ZK_INSTALL_DIR=/usr/local/zookeeper

KAFKA_INSTALL_DIR=/usr/local/kafka

​

NODE1=10.0.0.231

NODE2=10.0.0.232

NODE3=10.0.0.233

​

HOST=hostname -I|awk '{print $1}'

. /etc/os-release

​

​

color () {

RES_COL=60

MOVE_TO_COL="echo -en \033[${RES_COL}G"

SETCOLOR_SUCCESS="echo -en \033[1;32m"

SETCOLOR_FAILURE="echo -en \033[1;31m"

SETCOLOR_WARNING="echo -en \033[1;33m"

SETCOLOR_NORMAL="echo -en \E[0m"

echo-n"$1" && $MOVE_TO_COL

echo-n"["

if [ $2="success"-o$2="0" ] ;then

${SETCOLOR_SUCCESS}

echo-n$" OK "

elif [ $2="failure"-o$2="1" ] ;then

${SETCOLOR_FAILURE}

echo-n$"FAILED"

else

${SETCOLOR_WARNING}

echo-n$"WARNING"

fi

${SETCOLOR_NORMAL}

echo-n"]"

echo

}

​

​

install_jdk() {

if [ $ID='centos'-o $ID='rocky' ];then

yum -y install java-1.8.0-openjdk-devel || { color "安装JDK失败!"1; exit1; }

else

apt update

apt install openjdk-8-jdk -y || { color "安装JDK失败!"1; exit1; }

fi

java -version

}

​

zk_myid () {

read -p"请输入node编号(默认为 1): " MYID

​

if [ -z"$MYID" ] ;then

MYID=1

elif [[ ! "$MYID"=~ ^[0-9]+$ ]];then

color "请输入正确的node编号!"1

exit

else

true

fi

}

​

install_zookeeper() {

wget-P /usr/local/src/ $ZK_URL || { color "下载失败!"1 ;exit ; }

tar xf /usr/local/src/${ZK_URL##*/}-Cdirname ${ZK_INSTALL_DIR}

ln-s /usr/local/apache-zookeeper-*-bin/ ${ZK_INSTALL_DIR}

echo'PATH=${ZK_INSTALL_DIR}/bin:$PATH' > /etc/profile.d/zookeeper.sh

. /etc/profile.d/zookeeper.sh

mkdir-p${ZK_INSTALL_DIR}/data

echo$MYID > ${ZK_INSTALL_DIR}/data/myid

cat > ${ZK_INSTALL_DIR}/conf/zoo.cfg <<EOF

tickTime=2000

initLimit=10

syncLimit=5

dataDir=${ZK_INSTALL_DIR}/data

clientPort=2181

maxClientCnxns=128

autopurge.snapRetainCount=3

autopurge.purgeInterval=24

server.1=${NODE1}:2888:3888

server.2=${NODE2}:2888:3888

server.3=${NODE3}:2888:3888

EOF

cat > /lib/systemd/system/zookeeper.service <<EOF

[Unit]

Description=zookeeper.service

After=network.target

​

[Service]

Type=forking

#Environment=${ZK_INSTALL_DIR}

ExecStart=${ZK_INSTALL_DIR}/bin/zkServer.sh start

ExecStop=${ZK_INSTALL_DIR}/bin/zkServer.sh stop

ExecReload=${ZK_INSTALL_DIR}/bin/zkServer.sh restart

​

[Install]

WantedBy=multi-user.target

EOF

systemctl daemon-reload

systemctl enable --now zookeeper.service

systemctl is-active zookeeper.service

if [ $?-eq0 ] ;then

color "zookeeper 安装成功!"0

else

color "zookeeper 安装失败!"1

exit1

fi

}

​

​

install_kafka(){

if [ ! -f kafka_${SCALA_VERSION}-${KAFKA_VERSION}.tgz ];then

wget-P /usr/local/src $KAFKA_URL || { color "下载失败!"1 ;exit ; }

else

cp kafka_${SCALA_VERSION}-${KAFKA_VERSION}.tgz /usr/local/src/

fi

tar xf /usr/local/src/${KAFKA_URL##*/} -C /usr/local/

ln-s${KAFKA_INSTALL_DIR}_*/ ${KAFKA_INSTALL_DIR}

echoPATH=${KAFKA_INSTALL_DIR}/bin:'$PATH' > /etc/profile.d/kafka.sh

. /etc/profile.d/kafka.sh

cat > ${KAFKA_INSTALL_DIR}/config/server.properties <<EOF

broker.id=$MYID

listeners=PLAINTEXT://${HOST}:9092

log.dirs=${KAFKA_INSTALL_DIR}/data

num.partitions=1

log.retention.hours=168

zookeeper.connect=${NODE1}:2181,${NODE2}:2181,${NODE3}:2181

zookeeper.connection.timeout.ms=6000

EOF

mkdir${KAFKA_INSTALL_DIR}/data

cat > /lib/systemd/system/kafka.service <<EOF

[Unit]

Description=Apache kafka

After=network.target

​

[Service]

Type=simple

#Environment=JAVA_HOME=/data/server/java

#PIDFile=${KAFKA_INSTALL_DIR}/kafka.pid

ExecStart=${KAFKA_INSTALL_DIR}/bin/kafka-server-start.sh ${KAFKA_INSTALL_DIR}/config/server.properties

ExecStop=/bin/kill -TERM ${MAINPID}

Restart=always

RestartSec=20

​

[Install]

WantedBy=multi-user.target

​

EOF

systemctl daemon-reload

systemctl enable --now kafka.service

#kafka-server-start.sh -daemon ${KAFKA_INSTALL_DIR}/config/server.properties

systemctl is-active kafka.service

if [ $?-eq0 ] ;then

color "kafka 安装成功!"0

else

color "kafka 安装失败!"1

exit1

fi

}

​

​

zk_myid

​

install_jdk

​

install_zookeeper

​

install_kafka

​

[root@kafka-node1 ~]#bash install_kafka.sh

请输入node编号(默认为 1): 1

....................................

....................................

Created symlink /etc/systemd/system/multi-user.target.wants/zookeeper.service → /lib/systemd/system/zookeeper.service.

active

zookeeper 安装成功! [ OK ]

Created symlink /etc/systemd/system/multi-user.target.wants/kafka.service → /lib/systemd/system/kafka.service.

active

kafka 安装成功! [ OK ]

​

​

[root@kafka-node2 ~]#bash install_kafka.sh

请输入node编号(默认为 1): 2

....................................

....................................

Created symlink /etc/systemd/system/multi-user.target.wants/zookeeper.service → /lib/systemd/system/zookeeper.service.

active

zookeeper 安装成功! [ OK ]

Created symlink /etc/systemd/system/multi-user.target.wants/kafka.service → /lib/systemd/system/kafka.service.

active

kafka 安装成功! [ OK ]

​

[root@kafka-node3 ~]#bash install_kafka.sh

请输入node编号(默认为 1): 3

....................................

....................................

Created symlink /etc/systemd/system/multi-user.target.wants/zookeeper.service → /lib/systemd/system/zookeeper.service.

active

zookeeper 安装成功! [ OK ]

Created symlink /etc/systemd/system/multi-user.target.wants/kafka.service → /lib/systemd/system/kafka.service.

active

kafka 安装成功! [ OK ]

查看端口

#9092为kafka开启端口，

#2181为客户端连接 Zookeeper 服务器的端口，Zookeeper会监听这个端口，接受客户端的访问请求

#2888，zookeeper集群Leader和Follower的数据同步端口，只有leader才会打开

#3888为zookeeper集群Leader和Follower选举端口，Leader和Follower

[root@kafka-node1 ~]#ss -tln

State Recv-Q Send-Q Local Address:Port Peer Address:Port Process

LISTEN 0 128 0.0.0.0:22 0.0.0.0:*

LISTEN 0 128 127.0.0.1:6010 0.0.0.0:*

LISTEN 0 4096 127.0.0.53%lo:53 0.0.0.0:*

LISTEN 0 128 [::]:22 [root@kafka-node1 ~]#/usr/local/zookeeper/bin/zkServer.sh status

/bin/java

ZooKeeper JMX enabled by default

Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg

Client port found: 2181. Client address: localhost. Client SSL: false.

Mode: follower

[root@kafka-node1 ~]#ss -tln

State Recv-Q Send-Q Local Address:Port Peer Address:Port Process

LISTEN 0 50 [::ffff:10.0.0.231]:9092 :

LISTEN 0 50 *:2181 :

LISTEN 0 50 [::ffff:10.0.0.231]:3888 :

LISTEN 0 50 *:8080 :

LISTEN 0 50 *:35857 :

LISTEN 0 50 *:41109 :

​

​

[root@kafka-node2 ~]#/usr/local/zookeeper/bin/zkServer.sh status

/bin/java

ZooKeeper JMX enabled by default

Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg

Client port found: 2181. Client address: localhost. Client SSL: false.

Mode: follower

[root@kafka-node2 ~]#ss -tln

State Recv-Q Send-Q Local Address:Port Peer Address:Port Process

LISTEN 0 50 [::ffff:10.0.0.232]:9092 :

LISTEN 0 50 *:2181 :

LISTEN 0 50 *:32973 :

LISTEN 0 50 [::ffff:10.0.0.232]:3888 :

LISTEN 0 50 *:8080 :

​

[root@kafka-node3 ~]#/usr/local/zookeeper/bin/zkServer.sh status

/usr/bin/java

ZooKeeper JMX enabled by default

Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg

Client port found: 2181. Client address: localhost. Client SSL: false.

Mode: leader

[root@kafka-node3 ~]#ss -tln

State Recv-Q Send-Q Local Address:Port Peer Address:Port Process

LISTEN 0 50 [::ffff:10.0.0.233]:9092 :

LISTEN 0 50 *:2181 :

LISTEN 0 50 [::ffff:10.0.0.233]:2888 :

LISTEN 0 50 [::ffff:10.0.0.233]:3888 :

LISTEN 0 50 *:8080 :

LISTEN 0 50 *:40659 :

LISTEN 0 50 :44407 [::]:

LISTEN 0 128 [::1]:6010 [::]:*

LISTEN 0 50 [::ffff:10.0.0.231]:9092 :

LISTEN 0 50 *:2181 :

LISTEN 0 50 [::ffff:10.0.0.231]:3888 :

LISTEN 0 50 *:8080 :

LISTEN 0 50 *:35857 :

LISTEN 0 50 *:41109 :

使用exploer连接测试kafka集群是否正常

利用 Filebeat 收集日志到 Redis

安装Filebeat

#web服务器安装Filebeat

[root@elk-web1 ~]#wget https://mirrors.tuna.tsinghua.edu.cn/elasticstack/8.x/apt/pool/main/f/filebeat/filebeat-8.6.1-amd64.deb

​

[root@elk-web1 ~]#dpkg -i filebeat-8.6.1-amd64.deb

修改配置

[root@elk-web1 ~]#cp /etc/filebeat/filebeat.yml{,.bak}

​

[root@elk-web1 ~]#vim /etc/filebeat/filebeat.yml

filebeat.inputs:

• type: log

enabled: true

paths:

• /var/log/nginx/access_json.log

json.keys_under_root: true #默认False会将json数据存储至message，改为true则会独立message外存储

json.overwrite_keys: true #设为true,覆盖默认的message字段，使用json格式日志中>自定义的key

tags: ["nginx-access"] #指定tag,用于分类

​

• type: log

enabled: true

paths:

• /var/log/nginx/error.log

tags: ["nginx-error"]

​

• type: log

enabled: true

paths:

• /var/log/syslog

tags: ["syslog"]

​

output.kafka:

hosts: ["10.0.0.231:9092", "10.0.0.232:9092", "10.0.0.233:9092"]

topic: filebeat-log #指定kafka的topic

partition.round_robin:

reachable_only: true #true表示只发布到可用的分区，false时表示所有分区，如果一个节点down会导致阻塞

required_acks: 1 #如果为0，表示不确认，错误消息可能会丢失，1等待写入主分区（默认），-1等待写入副本分区

compression: gzip

max_message_bytes: 1000000

​

启动filebeat服务

[root@elk-web1 ~]#systemctl status filebeat.service

​

[root@elk-web1 ~]#systemctl enable --now filebeat.service

导入日志数据通过exploer验证kafka是否可接收数据

[root@elk-web1 ~]#cat access_json.log-20220304 >> /var/log/nginx/access_json.log

修改content type可查看具体数据内容

安装logstash收集kafka数据发送至Elasticsearch

包安装

#8.X 要求JDK11或17

[root@logstash ~]#apt update && apt -y install openjdk-11-jdk

​

[root@logstash ~]#wget https://mirrors.tuna.tsinghua.edu.cn/elasticstack/8.x/apt/pool/main/l/logstash/logstash-8.6.1-amd64.deb

​

[root@logstash ~]#dpkg -i logstash-8.6.1-amd64.deb

正在选中未选择的软件包 logstash。

(正在读取数据库 ... 系统当前共安装有 166976 个文件和目录。)

准备解压 logstash-8.6.1-amd64.deb ...

正在解压 logstash (1:8.6.1-1) ...

正在设置 logstash (1:8.6.1-1) ...

​

[root@logstash ~]#systemctl enable --now logstash.service

​

#采用包安装方式，默认会生成logstash,以此用户启动服务,如需抓取syslog等系统日志存在权限问题

[root@logstash ~]#id logstash

用户id=999(logstash) 组id=999(logstash) 组=999(logstash)

​

[root@logstash ~]#ll /var/log/syslog

-rw-r-----1 syslog adm 190160 2月 2021:00 /var/log/syslog #other用户无权限读

准备日志收集文件

[root@logstash ~]#cat /etc/logstash/conf.d/kafka-to-es.conf

input {

kafka {

bootstrap_servers => "10.0.0.231:9092,10.0.0.232:9092,10.0.0.233:9092"

topics => "filebeat-log" #与kafka指定的topic要一致

codec => "json"

#group_id => "logstash" #消费者组的名称

#consumer_threads => "3" #建议设置为和kafka的分区相同的值为线程数

#topics_pattern => "nginx-.*" #通过正则表达式匹配topic，而非用上面topics=>指定固定值

}

}

​

filter {

if"nginx-access"in [tags] {

geoip {

source=> "clientip" #日志必须是json格式,且有一个clientip的key

target => "geoip"

#database => "/etc/logstash/conf.d/GeoLite2-City.mmdb" #指定数据库文件,可选

add_field => ["[geoip][coordinates]","%{[geoip][geo][location][lon]}"] #8.X添加经纬度字段包括经度

add_field => ["[geoip][coordinates]","%{[geoip][geo][location][lat]}"] #8.X添加经纬度字段包括纬度

#add_field => ["[geoip][coordinates]", "%{[geoip][longitude]}"] #7,X添加经纬度字段包括经度

#add_field => ["[geoip][coordinates]", "%{[geoip][latitude]}"] #7,X添加经纬度字段包括纬度

}

#转换经纬度为浮点数，注意：8X必须做，7.X 可不做此步

mutate {

convert => [ "[geoip][coordinates]", "float"]

}

}

}

​

output {

stdout {

codec => "rubydebug" #调试代码，用户手动启动服务监测日志处理情况，生产后可删除

}

if"syslog"in [tags] {

elasticsearch {

hosts => ["10.0.0.206:9200","10.0.0.207:9200","10.0.0.208:9200"]

index => "logstash-syslog-%{+YYYY.MM.dd}"

}

}

​

if"nginx-access"in [tags] {

elasticsearch {

hosts => ["10.0.0.206:9200","10.0.0.207:9200","10.0.0.208:9200"]

index => "logstash-nginx-accesslog-%{+YYYY.MM.dd}"

template_overwrite => true

}

}

if"nginx-error"in [tags] {

elasticsearch {

hosts => ["10.0.0.206:9200","10.0.0.207:9200","10.0.0.208:9200"]

index => "logstash-nginx-errorlog-%{+YYYY.MM.dd}"

template_overwrite => true

}

}

}

​

​

#语法检测

[root@logstash ~]#/usr/share/logstash/bin/logstash -f /etc/logstash/conf.d/kafka-to-es.conf -t

.....................

[INFO ] 2023-02-2222:31:20.055 [LogStash::Runner] javapipeline - Pipeline main is configured with pipeline.ecs_compatibility: v8 setting. All plugins in this pipeline will default to ecs_compatibility => v8 unless explicitly configured otherwise.

Configuration OK

[INFO ] 2023-02-2222:31:20.056 [LogStash::Runner] runner - Using config.test_and_exit mode. Config Validation Result: OK. Exiting Logstash

​

​

#启动服务

[root@logstash ~]#systemctl enable --now logstash.service

Created symlink /etc/systemd/system/multi-user.target.wants/logstash.service → /lib/systemd/system/logstash.service.

​

[root@logstash ~]#systemctl status logstash.service

● logstash.service - logstash

Loaded: loaded (/lib/systemd/system/logstash.service; enabled; vendor prese>

Active: active (running) since Mon 2023-02-2022:32:27 CST; 2s ago

Main PID: 5204 (java)

Tasks: 20 (limit: 2196)

Memory: 167.2M

CPU: 3.548s

CGroup: /system.slice/logstash.service

└─5204 /usr/share/logstash/jdk/bin/java -Xms1g-Xmx1g-Djava.awt.he>

​

2月 2022:32:27 logstash systemd[1]: Started logstash.

2月 2022:32:27 logstash logstash[5204]: Using bundled JDK: /usr/share/logstash/>

lines 1-12/12 (END)

​

导入数据

导入历史数据模版，方便后续kibana展示

[root@elk-web1 ~]#cat access_json.log-20220304 >> /var/log/nginx/access_json.log

通过kafka工具查看kafka已缓存日志数据

通过插件查看索引

通过Kibana创建索引视图

查看视图

选择需要展示的视图