1、背景
此处简单记录一下，elasticsearch8和kibana8在Centos7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es对jdk和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。
3、安装步骤
3.1 下载对应版本的es
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。
[[email protected] ~]# useradd es
[[email protected] ~]# passwd es
[[email protected] es]# tar -zxf elasticsearch-8.4.3-linux-aarch64.tar.gz
[[email protected] es]# chown es -R elasticsearch-8.4.3
[[email protected] es]# su - es
Last login: Sun Oct 30 11:13:55 CST 2022 from 192.168.121.1 on pts/1
[[email protected] ~]$ cd /usr/local/es/elasticsearch-8.4.3
[[email protected] elasticsearch-8.4.3]$ mkdir datas
[[email protected] elasticsearch-8.4.3]$3.3 修改es配置
3.3.1 修改es配置
vim config/elasticsearch.yml
# 集群名
cluster.name: es-cluster
# 节点名
node.name: es-node01
# 数据目录
path.data: /usr/local/es/elasticsearch-8.4.3/datas
# 日志目录
path.logs: /usr/local/es/elasticsearch-8.4.3/logs
# es绑定到的地址
network.host: 192.168.121.138
# es启动后前端访问的端口
http.port: 9200
http.cors.enabled: true
http.cors.allow-origin: "*"
3.3.3 修改jvm配置
vim config/jvm.options
可以根据实际情况 修改一下 -Xms 和 -Xmx 等参数
3.4 修改系统配置
3.4.1 修改用户打开的文件数限制
- 通过
ulimit -n查看当前用户可打开的文件数 - 修改用户可打开的文件数限制
vim /etc/security/limits.conf
es soft nofile 65536
es hard nofile 65536参考链接： https://www.elastic.co/guide/en/elasticsearch/reference/current/setting-system-settings.html#ulimit
3.4.2 禁用swap
/etc/fstab
注释掉所有行中存在 swap 的行。
# /dev/mapper/cl_fedora-swap none swap defaults 0 0参考链接： https://www.elastic.co/guide/en/elasticsearch/reference/current/setup-configuration-memory.html
3.4.3 修改虚拟内存
vim /etc/sysctl.conf
在此文件的最后一行增加 vm.max_map_count=262144。
参考链接：https://www.elastic.co/guide/en/elasticsearch/reference/current/vm-max-map-count.html
3.4.4 提高线程数
vim /etc/security/limits.conf
es soft nproc 65536
es hard nproc 65536参考文档：https://www.elastic.co/guide/en/elasticsearch/reference/current/max-number-of-threads.html
以上配置配置完之后，重启一下系统，使系统配置生效。
3.5 放开9200端口
firewall-cmd --zone=public --add-port=9200/tcp --permanent
firewall-cmd --reload4、启动es
需要使用非root账户启动。
bin/elasticsearch 前台启动bin/elasticsearch -d 后台启动
5、重置 elastic 账户密码
[[email protected] elasticsearch-8.4.3]$ 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.
[[email protected] elasticsearch-8.4.3]$6、访问 es
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.username 和 elasticsearch.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 bin/elasticsearch-create-enrollment-token --scope kibana
7.2 启动kibana
bin/kibana
从上图中可以 访问地址为 http://192.168.121.138:5601/?code=634917
7.3 配置kibana
点击蓝色的按钮，就开始配置 elastic 了。