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所属分类：linux技术
1.导入 Elasticsearch GPG KEY:
rpm --import ./GPG-KEY-elasticsearch or apt-key add ./GPG-KEY-elasticsearch
2.添加elasticsearch的yum repo文件
vim /etc/yum.repos.d/elasticsearch.repo
[elasticsearch-7.x] name=Elasticsearch repository for 7.x packages baseurl=https://mirror.tuna.tsinghua.edu.cn/elasticstack/7.x/yum/ gpgcheck=1 gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch enabled=1 autorefresh=1 type=rpm-md
3.安装elasticsearch
yum install elasticsearch
4.配置elasticsearch
vim /etc/elasticsearch/elasticsearch.yml
# 17行，设置集群名称 cluster.name: my-cluster # 23行，设置节点名称 node.name: es-node1 # 56行，允许外网访问 network.host: 0.0.0.0 # 74行，配置集群master节点 cluster.initial_master_nodes: ["es-node1"]
# elasticsearch默认是不支持跨域的，在末尾添加如下两行支持跨域
http.cors.enabled: true
http.cors.allow-origin: "*"
5.elasticsearch 默认需要4g的内存，这里可以在适当修改，-Xms4g， 数字即为所占用内存
禁止 swap，一旦允许内存与磁盘的交换，会引起致命的性能问题。
可以通过在 elasticsearch.yml 中 bootstrap.memory_lock: true，以保持 JVM 锁定内存，保证 ES 的性能。
vim /etc/elasticsearch/jvm.options
-Xms1g -Xmx1g
6.elasticsearch不可以在root用户下启动，所以需要切换用户
# 添加用户，我这里叫es adduser es # 给用户设置密码 passwd 123456 # 切换到es用户下 su es
7.这时切换到es用户下，又会报各种权限不足，加上权限就OK了
#./elasticsearch-env:行88: /etc/sysconfig/elasticsearch: 权限不够 chown -R es /etc/sysconfig/elasticsearch #bin/elasticsearch-env: 第 96 行:cd: /etc/elasticsearch: 权限不够 chown -R es /etc/elasticsearch #Exception in thread "main" java.nio.file.AccessDeniedException: /var/lib/elasticsearch #只要看到AccessDeniedException异常就给它权限 chown -R es /var/lib/elasticsearch #Error opening log file '/var/log/elasticsearch/gc.log': Permission denied #将整个elasticsearch目录权限给它 chown -R es /var/log/elasticsearch #另外将安装路径的权限给它，这里目前还没报错，不过报错是迟早的事 chown -R es /usr/share/elasticsearch
8.启动es
cd /usr/share/elasticsearch/bin ./elasticsearch
9.测试
浏览器打开：http://ip:9200
如果开启了防火墙，需要开启9200端口，页面信息显示如下则启动成功
{ "name" : "es-node1", "cluster_name" : "elasticsearch", "cluster_uuid" : "-IqD_alTS5SZ3xAtr2_qfQ", "version" : { "number" : "7.17.9", "build_flavor" : "default", "build_type" : "rpm", "build_hash" : "ef48222227ee6b9e70e502f0f0daa52435ee634d", "build_date" : "2023-01-31T05:34:43.305517834Z", "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" }
