一：准备资料

• 部署了docker的centos
• 两或者三台服务器部署elasticsearch
• ip1、ip2

二：docker安装、Elasticsearch安装

1.1安装docker

[root@ecs-b3bf-0225795 ~]# yum install docker

[root@ecs-b3bf-0225795 ~]# systemctl start docker

1.2ES需要开启文件读取的配置

[root@ecs-b3bf-0225795 ~]# vi /etc/sysctl.conf

#加入这一行配置
vm.max_map_count = 655350

[root@ecs-b3bf-0225795 ~]# sysctl -p

1.3安装Elasticsearch

[root@ecs-b3bf-0225795 ~]# mkdir -p /home/docker/elasticsearch

[root@ecs-b3bf-0225795 ~]# cd /home/docker/elasticsearch/

[root@ecs-b3bf-0225795 elasticsearch]# docker pull docker.io/library/elasticsearch:7.6.2

安装完成后----先别启动

创建好我们后期的所有数据存储、插件、日志、配置目录
[root@ecs-b3bf-0225795 elasticsearch]# mkdir data
[root@ecs-b3bf-0225795 elasticsearch]# mkdir logs
[root@ecs-b3bf-0225795 elasticsearch]# mkdir -p plugins/ik
[root@ecs-b3bf-0225795 elasticsearch]# mkdir config
[root@ecs-b3bf-0225795 elasticsearch]# 
[root@ecs-b3bf-0225795 elasticsearch]# chmod -R 775 data
[root@ecs-b3bf-0225795 elasticsearch]# chmod -R 775 logs
[root@ecs-b3bf-0225795 elasticsearch]# chmod -R 775 plugins
[root@ecs-b3bf-0225795 elasticsearch]# chmod -R 775 config

安装ik分词器

[root@ecs-b3bf-0225795 plugins]# cd plugins/ik
[root@ecs-b3bf-0225795 ik]# wget https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v7.6.2/elasticsearch-analysis-ik-7.6.2.zip
[root@ecs-b3bf-0225795 ik]# unzip elasticsearch-analysis-ik-7.6.2.zip
[root@ecs-b3bf-0225795 ik]# 
[root@ecs-b3bf-0225795 ik]# 

将配置文件copy出来，放在到挂在路径

[root@ecs-b3bf-0225795 elasticsearch]# cd /home/docker/elasticsearch/
[root@ecs-b3bf-0225795 elasticsearch]# 
[root@ecs-b3bf-0225795 elasticsearch]# docker run -p 9200:9200 -p 9300:9300 \
--privileged=true --name es7 \
-e ES_JAVA_OPTS="-Xms4096m -Xmx4096m" \
-v /home/docker/elasticsearch/plugins:/usr/share/elasticsearch/plugins \
-v /home/docker/elasticsearch/data:/usr/share/elasticsearch/data \
-v /home/docker/elasticsearch/logs:/usr/share/elasticsearch/logs \
-d elasticsearch:7.6.2
[root@ecs-b3bf-0225795 elasticsearch]# 
[root@ecs-b3bf-0225795 elasticsearch]# 
[root@ecs-b3bf-0225795 elasticsearch]# docker cp -a es7:/usr/share/elasticsearch/config/ /home/docker/elasticsearch/
[root@ecs-b3bf-0225795 elasticsearch]# docker kill es7
[root@ecs-b3bf-0225795 elasticsearch]# docker rm es7

将我们es启动系统内的配置文件cp到我们挂载的物理路径

elasticsearch.yml

#集群名称
cluster.name: material-es
#当前该节点的名称
node.name: node-1
#是不是有资格竞选主节点
node.master: true
#是否存储数据
node.data: true
#最大集群节点数
node.max_local_storage_nodes: 3
#给当前节点自定义属性（可以省略）
#node.attr.rack: r1
#数据存档位置
path.data: /usr/share/elasticsearch/data
#日志存放位置
path.logs: /usr/share/elasticsearch/log
#是否开启时锁定内存（默认为是）
#bootstrap.memory_lock: true
#设置网关地址，我是被这个坑死了，这个地址我原先填写了自己的实际物理IP地址，
#然后启动一直报无效的IP地址，无法注入9300端口，这里只需要填写0.0.0.0
network.host: 0.0.0.0
#设置其它结点和该结点交互的ip地址，如果不设置它会自动判断，值必须是个真实的ip地址，设置当前物理机地址,
#如果是docker安装节点的IP将会是配置的IP而不是docker网管ip
network.publish_host: 175.6.3.132
#设置映射端口
http.port: 9200
#内部节点之间沟通端口
transport.tcp.port: 9300
#集群发现默认值为127.0.0.1:9300,如果要在其他主机上形成包含节点的群集,如果搭建集群则需要填写
#es7.x 之后新增的配置，写入候选主节点的设备地址，在开启服务后可以被选为主节点，也就是说把所有的节点都写上
discovery.seed_hosts: ["175.6.3.132:9300","175.6.3.133:9300","175.6.3.134:9300"]
#当你在搭建集群的时候，选出合格的节点集群，有些人说的太官方了，
#其实就是，让你选择比较好的几个节点，在你节点启动时，在这些节点中选一个做领导者，
#如果你不设置呢，elasticsearch就会自己选举，这里我们把三个节点都写上
cluster.initial_master_nodes: ["node-1","node-2","node-3"]
#在群集完全重新启动后阻止初始恢复，直到启动N个节点
#简单点说在集群启动后，至少复活多少个节点以上，那么这个服务才可以被使用，否则不可以被使用，
gateway.recover_after_nodes: 2
#删除索引是是否需要显示其名称，默认为显示
#action.destructive_requires_name: true
# 是否支持跨域，默认为false
http.cors.enabled: true
# 当设置允许跨域，默认为*,表示支持所有域名，如果我们只是允许某些网站能访问，那么可以使用正则表达式。比如只允许本地地址。/https?:\/\/localhost(:[0-9]+)?/
http.cors.allow-origin: "*"

替换好新的配置文件

启动命令-每台机器都执行同样的指令
[root@ecs-b3bf-0225795 elasticsearch]# docker run -p 9200:9200 -p 9300:9300 \
--privileged=true --name es7 \
-e ES_JAVA_OPTS="-Xms4096m -Xmx4096m" \
-v /home/docker/elasticsearch/plugins:/usr/share/elasticsearch/plugins \
-v /home/docker/elasticsearch/data:/usr/share/elasticsearch/data \
-v /home/docker/elasticsearch/logs:/usr/share/elasticsearch/logs \
-v /home/docker/elasticsearch/config:/usr/share/elasticsearch/config \
-d elasticsearch:7.6.2

三：安全设置

安全性处理：基于上述已经在运行的容器之上,在主机上执行此运行方式即可
获取p12文件 打开安全设置

3.1生成 p12文件

[root@ecs-b3bf-0225795 elasticsearch]# cd /
[root@ecs-b3bf-0225795 ~]# docker run -dit --name=es elasticsearch:7.6.2 /bin/bash
f87b0e87cbe6cc5a1c53e6e343914072369641cef216815ca0d4f18e50a9da5e

[root@ecs-b3bf-0225795 ~]# docker exec -it es /bin/bash
[root@ecs-b3bf-0225795 elasticsearch]# 进入我们临时的es容器内去执行命令
[root@ecs-b3bf-0225795 elasticsearch]# bin/elasticsearch-certutil ca
[root@ecs-b3bf-0225795 elasticsearch]# 一路回车操作
[root@ecs-b3bf-0225795 elasticsearch]# 一路回车操作
[root@ecs-b3bf-0225795 elasticsearch]# bin/elasticsearch-certutil cert --ca elastic-stack-ca.p12
[root@ecs-b3bf-0225795 elasticsearch]# 一路回车操作
[root@ecs-b3bf-0225795 elasticsearch]# 一路回车操作
[root@ecs-b3bf-0225795 elasticsearch]# 生成完成后
[root@ecs-b3bf-0225795 elasticsearch]# 
[root@ecs-b3bf-0225795 elasticsearch]# ls
-rw------- 1 root root 3451 Mar  1 17:42 elastic-certificates.p12
...
[root@ecs-b3bf-0225795 elasticsearch]# 退出当前容器
[root@ecs-b3bf-0225795 elasticsearch]# exit; 
exit
[root@ecs-b3bf-0225795 ~]# 复制我们生成的p12到物理路径
[root@ecs-b3bf-0225795 ~]# docker cp -a es:/usr/share/elasticsearch/elastic-certificates.p12 /home/docker/elasticsearch/config/
[root@ecs-b3bf-0225795 ~]# 
[root@ecs-b3bf-0225795 ~]# docker kill es
es
[root@ecs-b3bf-0225795 ~]# docker rm es
es
[root@ecs-b3bf-0225795 ~]# 停止es集群所有节点
[root@ecs-b3bf-0225795 ~]# docker kill es7
[root@ecs-b3bf-0225795 ~]# docker rm es7

elasticsearch.yml 开启安全配置

# 打开安全设置
xpack.security.enabled: true
xpack.security.transport.ssl.enabled: true
xpack.security.transport.ssl.keystore.type: PKCS12
xpack.security.transport.ssl.verification_mode: certificate
xpack.security.transport.ssl.keystore.path: elastic-certificates.p12
xpack.security.transport.ssl.truststore.path: elastic-certificates.p12
xpack.security.transport.ssl.truststore.type: PKCS12
xpack.security.audit.enabled: true

将新文件配置文件，elasticsearch.yml 、elastic-certificates.p12  推送到每个节点的目录：

/home/docker/elasticsearch/config

并授权所有用户可读

[root@ecs-b3bf-0225795 ~]# 授权所有用户可读
[root@ecs-b3bf-0225795 ~]# chmod +r /home/docker/elasticsearch/config/elastic-certificates.p12

3.2生成Es的访问密码

切记：集群三个节点之间的9200,9300 一定要都可以互通，自动生成密码：需要记录下来，需要开启9200,9300端口
[root@ecs-b3bf-0225795 ~]# 启动我们的集群
[root@ecs-b3bf-0225795 ~]# docker run -p 9200:9200 -p 9300:9300 \
--privileged=true --name es7 \
-e ES_JAVA_OPTS="-Xms4096m -Xmx4096m" \
-v /home/docker/elasticsearch/plugins:/usr/share/elasticsearch/plugins \
-v /home/docker/elasticsearch/data:/usr/share/elasticsearch/data \
-v /home/docker/elasticsearch/logs:/usr/share/elasticsearch/logs \
-v /home/docker/elasticsearch/config:/usr/share/elasticsearch/config \
-v /home/docker/elasticsearch/config/elastic-certificates.p12:/usr/share/elasticsearch/config/elastic-certificates.p12 \
-d elasticsearch:7.6.2
[root@ecs-b3bf-0225795 ~]# 
[root@ecs-b3bf-0225795 ~]# 进入当前启动节点es7的容器内
[root@ecs-b3bf-0225795 ~]# docker exec -it es7 /bin/bash
[root@ac0fa780b8db elasticsearch]#
[root@ac0fa780b8db elasticsearch]#
[root@ac0fa780b8db elasticsearch]# ./bin/elasticsearch-setup-passwords auto
Initiating the setup of passwords for reserved users elastic,apm_system,kibana,logstash_system,beats_system,remote_monitoring_user.
The passwords will be randomly generated and printed to the console.
Please confirm that you would like to continue [y/N]y


Changed password for user apm_system
PASSWORD apm_system = I5kYgua12jyhTWgGE6DoR

Changed password for user kibana
PASSWORD kibana = QehLVOFFTmoVSlK2121n4hU

Changed password for user logstash_system
PASSWORD logstash_system = e0woYM550en2121kSmfCph0
......

Changed password for user elastic
PASSWORD elastic = qRJvpTYcvslk1WhfvRfHE

如果你是单机启动，配置文件内只需要有这些就够了
[root@iZ8vb3lp570ckrtrhp6f42Z config]# cat elasticsearch.yml 
cluster.name: "material-es"
network.host: 0.0.0.0
#当前该节点的名称
node.name: "node-1"

# 打开安全设置
xpack.security.enabled: true
xpack.security.transport.ssl.enabled: true
xpack.security.transport.ssl.keystore.type: PKCS12
xpack.security.transport.ssl.verification_mode: certificate
xpack.security.transport.ssl.keystore.path: elastic-certificates.p12
xpack.security.transport.ssl.truststore.path: elastic-certificates.p12
xpack.security.transport.ssl.truststore.type: PKCS12
xpack.security.audit.enabled: true

启动时需要加个参数，告知非集群启动
[root@ecs-b3bf-0225795 ~]# docker run -p 9200:9200 -p 9300:9300 \
--privileged=true --name es7 \
-e "discovery.type=single-node" \
-e ES_JAVA_OPTS="-Xms4096m -Xmx4096m" \
-v /home/docker/elasticsearch/plugins:/usr/share/elasticsearch/plugins \
-v /home/docker/elasticsearch/data:/usr/share/elasticsearch/data \
-v /home/docker/elasticsearch/logs:/usr/share/elasticsearch/logs \
-v /home/docker/elasticsearch/config:/usr/share/elasticsearch/config \
-v /home/docker/elasticsearch/config/elastic-certificates.p12:/usr/share/elasticsearch/config/elastic-certificates.p12 \
-d elasticsearch:7.6.2

我们需要的是：elastic 这个用户

备注：生成的账户与密码会互传到子节点，子节点不需要去执行此操作

 有效参考资料：

《CentOS ES7.6集群搭建》

《CentOS ES7.6.2 Docker安装部署》

《CentOS ES7.6集群搭建Elasticsearch安全策略-开启密码账号访问CentOS ES7.6集群搭建》