安装包
安装jdk（参考文章）：https://blog.csdn.net/m0_51510236/article/details/113739345
ElasticSearch: https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.14.2-linux-x86_64.tar.gz
安装步骤
创建安装目录（可依照个人使用习惯更改）：
mkdir /opt/server
解压elasticsearch安装包到这个目录
tar -zxvf elasticsearch-7.14.2-linux-x86_64.tar.gz -C /opt/server
修改 elasticsearch-7.14.2/config/jvm.options 文件，修改内存大小，可根据物理机实际配置修改（配置可参考文档https://blog.csdn.net/m0_51510236/article/details/113738338）：
-Xms256m -Xmx256m -Xmn128m
修改 elasticsearch-7.14.2/config/elasticsearch.yml 文件，修改配置（192.168.27.5 为我自己的IP地址，需要改为自己的IP地址）：
# ======================== 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-application # # ------------------------------------ Node ------------------------------------ # # Use a descriptive name for the node: # node.name: node-1 # # 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: /path/to/data # # Path to log files: # #path.logs: /path/to/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: 192.168.27.5 # # 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: ["192.168.27.5"] # # Bootstrap the cluster using an initial set of master-eligible nodes: # cluster.initial_master_nodes: ["node-1"] # # For more information, consult the discovery and cluster formation module documentation. # # ---------------------------------- Various ----------------------------------- # # Require explicit names when deleting indices: # #action.destructive_requires_name: true
因为ElasticSearch不允许root用户启动，所以创建一个es用户：
groupadd es useradd es -g es passwd es # 下面设置es用户登录的密码
创建步骤：
顺便将elasticsearch目录的所有者改为es：
chown es:es -R elasticsearch-7.14.2
修改系统配置文件：
vim /etc/security/limits.conf # 添加已下内容 es hard nofile 65536 es soft nofile 65536
第二个配置文件：
vim /etc/sysctl.conf # 添加以下内容 vm.max_map_count=655360
打印并生效：
sysctl -p
可以直接执行这一段shell添加配置：
echo "es hard nofile 65536" >> /etc/security/limits.conf echo "es soft nofile 65536" >> /etc/security/limits.conf echo "vm.max_map_count=655360" >> /etc/sysctl.conf sysctl -p
切换到es用户并启动elasticsearch：
su es bin/elasticsearch
看到这个代表启动成功：
访问elasticsearch主机的 9200 端口：
elasticsearch安装成功
安装ik分词器
ik分词器的作用为：”为中文搜索提供词汇支持“，所以建议安装，在elasticsearch的 plugins 目录下创建文件夹 ik，然后将之前下载的分词器的压缩包解压到该目录中：
mkdir ik cd ik/ yum install -y unzip unzip /usr/local/src/elasticsearch-analysis-ik-7.14.2.zip
然后从新启动elasticsearch即可
