官方指引：Install Elasticsearch with RPM | Elasticsearch Guide [7.16] | Elastic
准备3台虚拟机centos7，每个虚拟机挂一块硬盘/esdata。按照官方指引安装
挂载硬盘、开防火墙等参考：Centos8 常用_leoppeng的专栏-CSDN博客
1、
rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch
2、vim常用的功能要熟，编辑文件会用到
vim /etc/yum.repos.d/elasticsearch.repo [elasticsearch] name=Elasticsearch repository for 7.x packages baseurl=https://artifacts.elastic.co/packages/7.x/yum gpgcheck=1 gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch enabled=0 autorefresh=1 type=rpm-md
3、
sudo yum install --enablerepo=elasticsearch elasticsearch
到这就算安装完成、接下来是配置
给elasticsearch用户授权、安装的时候创建的
chown -R elasticsearch:elasticsearch /esdata
修改配置文件，多台机器节点配置文件基本一样：
节点名称（node.name）和节点网络（network.host）改成各个虚拟机的
数据目录（path.data）和日志(path.logs)改成实际的路径
集群名称（cluster.name）一致
discovery.seed_hosts 把所有节点的ip加进来
cluster.initial_master_nodes 主节点
vim /etc/elasticsearch/elasticsearch.yml # ======================== Elasticsearch Configuration ========================= # # NOTE: Elasticsearch comes with reasonable defaults for most settings. # Before you set out to tweak and tune the configuration, make sure you # understand what are you trying to accomplish and the consequences. # # The primary way of configuring a node is via this file. This template lists # the most important settings you may want to configure for a production cluster. # # Please consult the documentation for further information on configuration options: # https://www.elastic.co/guide/en/elasticsearch/reference/index.html # # ---------------------------------- Cluster ----------------------------------- # # Use a descriptive name for your cluster: # cluster.name: my-cluster-yq # # ------------------------------------ Node ------------------------------------ # # Use a descriptive name for the node: # node.name: node-222 # # Add custom attributes to the node: # #node.attr.rack: r1 # # ----------------------------------- Paths ------------------------------------ # # Path to directory where to store the data (separate multiple locations by comma): # path.data: /esdata/data # # Path to log files: # path.logs: /esdata/logs # # ----------------------------------- Memory ----------------------------------- # # Lock the memory on startup: # #bootstrap.memory_lock: true # # Make sure that the heap size is set to about half the memory available # on the system and that the owner of the process is allowed to use this # limit. # # Elasticsearch performs poorly when the system is swapping the memory. # # ---------------------------------- Network ----------------------------------- # # By default Elasticsearch is only accessible on localhost. Set a different # address here to expose this node on the network: # network.host: 10.10.30.222 # # By default Elasticsearch listens for HTTP traffic on the first free port it # finds starting at 9200. Set a specific HTTP port here: # http.port: 9200 # # For more information, consult the network module documentation. # # --------------------------------- Discovery ---------------------------------- # # Pass an initial list of hosts to perform discovery when this node is started: # The default list of hosts is ["127.0.0.1", "[::1]"] # discovery.seed_hosts: ["10.10.30.220:9300", "10.10.30.221:9300","10.10.30.222:9300"] # # Bootstrap the cluster using an initial set of master-eligible nodes: # cluster.initial_master_nodes: ["node-220", "node-221","node-222"] # # For more information, consult the discovery and cluster formation module documentation. # # ---------------------------------- Various ----------------------------------- # # Require explicit names when deleting indices: # #action.destructive_requires_name: true # # ---------------------------------- Security ---------------------------------- # # *** WARNING *** # # Elasticsearch security features are not enabled by default. # These features are free, but require configuration changes to enable them. # This means that users don’t have to provide credentials and can get full access # to the cluster. Network connections are also not encrypted. # # To protect your data, we strongly encourage you to enable the Elasticsearch security features. # Refer to the following documentation for instructions. # # https://www.elastic.co/guide/en/elasticsearch/reference/7.16/configuring-stack-security.html
设置防火墙、开9200和9300端口号。
然后启动
systemctl start elasticsearch systemctl enable elasticsearch
浏览器输入http://ip:9200.出现如下界面说明已成功
输入如下连接http://ip:9200/_cat/health?v，查看集群状态
输入如下连接http://ip:9200/_cat/nodes?v查看节点情况
可以看到222是主节点。
用yum的安装方式，比较方便。如果自己下载压缩包，解压，创建启动用户、设置权限、编写服务脚本会很麻烦。稍微不注意就会出问题。用yum安装，这些工作都自动完成了
我们查看服务启动脚本可以看到：/usr/lib/systemd/system/elasticsearch.service
如果自己安装是要去修改系统的配置文件的
后期实际使用过程，再记录相关问题和优化配置
