0.环境系统
1.安装es集群
- 下载及安装
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.17.6-x86_64.rpm wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.17.6-x86_64.rpm.sha512 yum install perl-Digest-SHA -y shasum -a 512 -c elasticsearch-7.17.6-x86_64.rpm.sha512 rpm --install elasticsearch-7.17.6-x86_64.rpm
- 设置为系统启动时自动启动
systemctl daemon-reload systemctl enable elasticsearch.service
- 服务启动与关闭（可以等修改完一些配置后再启动）
systemctl start elasticsearch.service systemctl stop elasticsearch.service
- {如果你使用了密码保护es密钥库，则需要使用本地文件和系统环境变量提供密钥库密码}
mkdir /path/to -p echo "espasswd" > /path/to/my_pwd_file.tmp chmod 600 /path/to/my_pwd_file.tmp chown elasticsearch.elasticsearch /path/to/my_pwd_file.tmp systemctl set-environment ES_KEYSTORE_PASSPHRASE_FILE=/path/to/my_pwd_file.tmp
2.配置es集群
es服务有三个比较重要的文件：
es配置文件：elasticsearch.yml JVM配置：jvm.options 日志记录配置：log4j2.properties
2.1.修改es配置文件
- 设置集群名称
cluster.name: my-es
- 设置节点名称(使用各自主机名)
node.name: es-node01
- 数据和日志存放路径（注意生产中不要使用默认路径，数据容易满）
path.data: /var/lib/elasticsearch path.logs: /var/log/elasticsearch
- 网络设置
network.host: 0.0.0.0
- 集群设置（设置集群有多少节点）
discovery.seed_hosts: ["192.168.0.250", "192.168.0.251", "192.168.0.252"]
- 参与master选举设置
cluster.initial_master_nodes: ["192.168.0.250", "192.168.0.251", "192.168.0.252"]
2.2.修改JVM配置
- 限制内存大小（可以使用内存的一半，最大不超过32）
-Xms2g -Xmx2g
对了，提一句，安装es会默认携带openjdk，如果使用自定义jdk请更改指向路径。
3.系统配置
- 设置文件句柄数（因为我使用阿里云主机，默认是配置好的）
vim /etc/security/limits.conf root soft nofile 65535 root hard nofile 65535 * soft nofile 65535 * hard nofile 65535
- 禁用交换内存（阿里云同样没有这项）
sawpoff -a # vim /etc/fstab 找到swap那行进行注释
- 设置虚拟内存
sysctl -w vm.max_map_count=262144 vim /etc/sysctl.conf vm.max_map_count = 262144 sysctl -p
- 设置线程数
vim /etc/security/limits.conf * soft nproc 4096 * hard nproc 4096
4.启动es集群
配置目前就先配置这么多了，还有很多配置可以参考官网
- 启动es集群
systemctl start elasticsearch.service netstat -utpln tcp6 0 0 :::9200 :::* LISTEN 12535/java tcp6 0 0 :::9300 :::* LISTEN 12535/java
- 验证集群是否运行成功
es-node01：
curl 127.0.0.1:9200 { "name" : "es-node01", "cluster_name" : "my-es", "cluster_uuid" : "7_WxMzV4TjKE5xnyowvG3A", "version" : { "number" : "7.17.6", "build_flavor" : "default", "build_type" : "rpm", "build_hash" : "f65e9d338dc1d07b642e14a27f338990148ee5b6", "build_date" : "2022-08-23T11:08:48.893373482Z", "build_snapshot" : false, "lucene_version" : "8.11.1", "minimum_wire_compatibility_version" : "6.8.0", "minimum_index_compatibility_version" : "6.0.0-beta1" }, "tagline" : "You Know, for Search" }
es-node02：
curl 127.0.0.1:9200 { "name" : "es-node02", "cluster_name" : "my-es", "cluster_uuid" : "7_WxMzV4TjKE5xnyowvG3A", "version" : { "number" : "7.17.6", "build_flavor" : "default", "build_type" : "rpm", "build_hash" : "f65e9d338dc1d07b642e14a27f338990148ee5b6", "build_date" : "2022-08-23T11:08:48.893373482Z", "build_snapshot" : false, "lucene_version" : "8.11.1", "minimum_wire_compatibility_version" : "6.8.0", "minimum_index_compatibility_version" : "6.0.0-beta1" }, "tagline" : "You Know, for Search" }
es-node03：
curl 127.0.0.1:9200 { "name" : "es-node03", "cluster_name" : "my-es", "cluster_uuid" : "7_WxMzV4TjKE5xnyowvG3A", "version" : { "number" : "7.17.6", "build_flavor" : "default", "build_type" : "rpm", "build_hash" : "f65e9d338dc1d07b642e14a27f338990148ee5b6", "build_date" : "2022-08-23T11:08:48.893373482Z", "build_snapshot" : false, "lucene_version" : "8.11.1", "minimum_wire_compatibility_version" : "6.8.0", "minimum_index_compatibility_version" : "6.0.0-beta1" }, "tagline" : "You Know, for Search" }
- 查看哪个节点为主节点：*为主节点
curl http://192.168.0.250:9200/_cat/master LnrA5H20Q8qtUeoxBAMrHQ 192.168.0.250 192.168.0.250 es-node01 curl http://192.168.0.250:9200/_cat/nodes 192.168.0.252 16 97 1 0.11 0.04 0.05 cdfhilmrstw - es-node03 192.168.0.250 18 96 2 0.03 0.05 0.09 cdfhilmrstw * es-node01 192.168.0.251 14 97 2 0.13 0.06 0.09 cdfhilmrstw - es-node02
因为是使用阿里云的内网部署的集群，所以在浏览器上看不到，可以部署kiana作为集群的前端页面来查看。
