记录在linux上单机elasticsearch8和kibana8

1、背景

此处简单记录一下,elasticsearch8kibana8Centos7下的单机安装步骤。

2、es对jdk和操作系统的要求等

不同版本的esjdk操作系统的要求不等,我们选择合适的版本,可以通过如下 https://www.elastic.co/cn/support/matrix#matrix_kubernetes进行确认。

记录在linux上单机elasticsearch8和kibana8

3、安装步骤

3.1 下载对应版本的es

记录在linux上单机elasticsearch8和kibana8
下载地址:https://www.elastic.co/cn/downloads/elasticsearch

3.2 创建es账户

需要为es单独创建一个用户,使用root账户启动es会报错。

[root@appbasic ~]# useradd es [root@appbasic ~]# passwd es [root@appbasic es]# tar -zxf elasticsearch-8.4.3-linux-aarch64.tar.gz [root@appbasic es]# chown es -R elasticsearch-8.4.3 [root@appbasic es]# su - es Last login: Sun Oct 30 11:13:55 CST 2022 from 192.168.121.1 on pts/1 [es@appbasic ~]$ cd /usr/local/es/elasticsearch-8.4.3 [es@appbasic elasticsearch-8.4.3]$ mkdir datas [es@appbasic elasticsearch-8.4.3]$ 

3.3 修改es配置

3.3.1 修改es配置

vim config/elasticsearch.yml

# 集群名 cluster.name: es-cluster # 节点名 node.name: es-node01 # 数据目录 path.data: /usr/local/es/elasticsearch-8.4.3/datas # 日志目录 path.logs: /usr/local/es/elasticsearch-8.4.3/logs # es绑定到的地址 network.host: 192.168.121.138 # es启动后前端访问的端口 http.port: 9200  http.cors.enabled: true http.cors.allow-origin: "*"   

3.3.3 修改jvm配置

vim config/jvm.options

可以根据实际情况 修改一下 -Xms 和 -Xmx 等参数

3.4 修改系统配置

3.4.1 修改用户打开的文件数限制

  1. 通过 ulimit -n 查看当前用户可打开的文件数
  2. 修改用户可打开的文件数限制

vim /etc/security/limits.conf

es               soft    nofile          65536 es               hard    nofile          65536 

参考链接: https://www.elastic.co/guide/en/elasticsearch/reference/current/setting-system-settings.html#ulimit

3.4.2 禁用swap

/etc/fstab
注释掉所有行中存在 swap 的行。

# /dev/mapper/cl_fedora-swap none      swap    defaults        0 0 

参考链接: https://www.elastic.co/guide/en/elasticsearch/reference/current/setup-configuration-memory.html

3.4.3 修改虚拟内存

vim /etc/sysctl.conf

在此文件的最后一行增加 vm.max_map_count=262144

参考链接:https://www.elastic.co/guide/en/elasticsearch/reference/current/vm-max-map-count.html

3.4.4 提高线程数

vim /etc/security/limits.conf

es               soft     nproc          65536 es               hard    nproc          65536 

参考文档:https://www.elastic.co/guide/en/elasticsearch/reference/current/max-number-of-threads.html

以上配置配置完之后,重启一下系统,使系统配置生效。

3.5 放开9200端口

firewall-cmd --zone=public --add-port=9200/tcp --permanent firewall-cmd --reload 

4、启动es

需要使用非root账户启动。

bin/elasticsearch 前台启动
bin/elasticsearch -d 后台启动

记录在linux上单机elasticsearch8和kibana8

5、重置 elastic 账户密码

[es@appbasic elasticsearch-8.4.3]$ bin/elasticsearch-reset-password --username elastic -i warning: ignoring JAVA_HOME=/usr/local/jdk8; using bundled JDK WARNING: Group of file [/usr/local/es/elasticsearch-8.4.3/config/users] used to be [root], but now is [es] WARNING: Group of file [/usr/local/es/elasticsearch-8.4.3/config/users_roles] used to be [root], but now is [es] This tool will reset the password of the [elastic] user. You will be prompted to enter the password. Please confirm that you would like to continue [y/N]y   Enter password for [elastic]: Re-enter password for [elastic]: Password for the [elastic] user successfully reset. [es@appbasic elasticsearch-8.4.3]$ 

6、访问 es

记录在linux上单机elasticsearch8和kibana8
出现如下信息,说明访问成功。

   "name": "es-node01",   "cluster_name": "es-cluster",   "cluster_uuid": "OJsQ_w1ZTKWepM-u8-U-tg",   "version": {     "number": "8.4.3",     "build_flavor": "default",     "build_type": "tar",     "build_hash": "42f05b9372a9a4a470db3b52817899b99a76ee73",     "build_date": "2022-10-04T07:17:24.662462378Z",     "build_snapshot": false,     "lucene_version": "9.3.0",     "minimum_wire_compatibility_version": "7.17.0",     "minimum_index_compatibility_version": "7.0.0"   },   "tagline": "You Know, for Search" } 

7、kibana连接到es

7.1 修改kibana配置

vim /usr/local/kibana/kibana-8.4.3/config/kibana.yml

server.port: 5601 server.host: "192.168.121.138" # elasticsearch.hosts: ["https://192.168.121.138:9200"] 和 es用户民密码都不用配置 

注意:
如果上方的配置中增加了 如下配置 ( elasticsearch.usernameelasticsearch.password) 或者 elasticsearch.hosts) 则可能出现如下异常

`[2022-10-30T18:31:29.858+08:00][ERROR][elasticsearch-service] Unable to retrieve version information from Elasticsearch nodes. self signed certificate in certificate chain` 

解决方案:
执行如下命令

bin/kibana-setup --enrollment-token <enrollment-token> 

<enrollment-token>通过如下命令获取:bin/elasticsearch-create-enrollment-token --scope kibana

参考链接:https://www.elastic.co/guide/en/elasticsearch/reference/current/configuring-stack-security.html#stack-start-with-security

7.2 启动kibana

bin/kibana

记录在linux上单机elasticsearch8和kibana8
从上图中可以 访问地址为 http://192.168.121.138:5601/?code=634917

7.3 配置kibana

记录在linux上单机elasticsearch8和kibana8
点击蓝色的按钮,就开始配置 elastic 了。

8、参考链接

  1. https://www.elastic.co/guide/en/elasticsearch/reference/current/install-elasticsearch.html
  2. https://www.elastic.co/guide/en/elasticsearch/reference/current/system-config.html
  3. https://www.elastic.co/guide/en/elasticsearch/reference/current/configuring-stack-security.html#stack-start-with-security
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