进入elasticsearch官网下载：https://www.elastic.co/cn/downloads/past-releases#elasticsearch ,找到自己要用的版本，我要用的是7.3.0，为了方便我把elasticsearch简称es
2.安装es2.1安装环境说明
Centos7、JAVA_HOME= /data/jdk/jdk1.8.0_181、Elasticsearch7.3.0
linux版本：
[root@izm5e1lllyaje4uovv8cbdz ~]# lsb_release -a LSB Version: :core-4.1-amd64:core-4.1-noarch Distributor ID: CentOS Description: CentOS Linux release 7.4.1708 (Core) Release: 7.4.1708 Codename: Core
JAVA_HOME：
[root@izm5e1lllyaje4uovv8cbdz ~]# echo $JAVA_HOME /data/jdk/jdk1.8.0_181
Elasticsearch7.3.0：
百度云
链接：https://pan.baidu.com/s/1rilcEzxitcJkbIZ8r3c_DQ
提取码：jstl
2.2 创建新用户
出于安全考虑，es默认不允许以root账号运行，es5之后的都不能使用添加启动参数或者修改配置文件等方法启动了，必须要创建用户。
root用户身份创建用户 esuser
[root@izm5e1lllyaje4uovv8cbdz ~]# adduser esuser [root@izm5e1lllyaje4uovv8cbdz ~]# passwd esuser Changing password for user esuser. New password: BAD PASSWORD: The password is shorter than 8 characters Retype new password: passwd: all authentication tokens updated successfully.
2.3上传安装包并解压
创建成功后，我们切换到刚刚创建的esuser用户下，进入到 /home/esuser 目录下，
新建一个名为es的目录，并赋予最高权限，进入到es目录下，将下载的安装包上传并解压，或者直接使用wget命令下载安装包：wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.3.0.tar.gz，解压，如下：
[root@izm5e1lllyaje4uovv8cbdz ~]# su esuser [esuser@izm5e1lllyaje4uovv8cbdz root]$ cd /home/esuser [esuser@izm5e1lllyaje4uovv8cbdz ~]$ ls [esuser@izm5e1lllyaje4uovv8cbdz ~]$ mkdir es [esuser@izm5e1lllyaje4uovv8cbdz ~]$ ls es [esuser@izm5e1lllyaje4uovv8cbdz ~]$ chmod 777 es/ [esuser@izm5e1lllyaje4uovv8cbdz ~]$ cd es [esuser@izm5e1lllyaje4uovv8cbdz es]$ rz [esuser@izm5e1lllyaje4uovv8cbdz es]$ ls elasticsearch-7.3.0-linux-x86_64.tar.gz [esuser@izm5e1lllyaje4uovv8cbdz es]$ [esuser@izm5e1lllyaje4uovv8cbdz es]$ tar -zxvf elasticsearch-7.3.0-linux-x86_64.tar.gz [esuser@izm5e1lllyaje4uovv8cbdz es]$ ls elasticsearch-7.3.0 elasticsearch-7.3.0-linux-x86_64.tar.gz [esuser@izm5e1lllyaje4uovv8cbdz elasticsearch-7.3.0]$ ls bin config jdk lib LICENSE.txt logs modules NOTICE.txt plugins README.textile
2.4修改es配置文件elasticsearch.yml
[root@izm5e1lllyaje4uovv8cbdz config]# pwd /home/esuser/es/elasticsearch-7.3.0/config [root@izm5e1lllyaje4uovv8cbdz config]# ls elasticsearch.keystore elasticsearch.yml jvm.options log4j2.properties role_mapping.yml roles.yml users users_roles [root@izm5e1lllyaje4uovv8cbdz config]# vim elasticsearch.yml
解压完成后配置文件所有的配置都是注释的，这里我们需要修改几个配置
完整的elasticsearch.yml如下：
# ======================== 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: /home/esuser/es/elasticsearch-7.3.0/data # # Path to log files: # path.logs: /home/esuser/es/elasticsearch-7.3.0/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 ----------------------------------- # # Set the bind address to a specific IP (IPv4 or IPv6): # network.host: 0.0.0.0 # # Set a custom port for HTTP: # 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: ["host1", "host2"] # # 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. # # ---------------------------------- Gateway ----------------------------------- # # Block initial recovery after a full cluster restart until N nodes are started: # #gateway.recover_after_nodes: 3 # # For more information, consult the gateway module documentation. # # ---------------------------------- Various ----------------------------------- # # Require explicit names when deleting indices: # #action.destructive_requires_name: true
2.4运行es
进入elasticsearch-7.3.0目录下,执行 ./bin/elasticsearch,结果发现报错，如下：
[esuser@izm5e1lllyaje4uovv8cbdz elasticsearch-7.3.0]$ ./bin/elasticsearch future versions of Elasticsearch will require Java 11; your Java version from [/data/jdk/jdk1.8.0_181/jre] does not meet this requirement [esuser@izm5e1lllyaje4uovv8cbdz elasticsearch-7.3.0]$ ./bin/elasticsearch Java HotSpot(TM) 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
以上报错和警告解决方案请参考：Elasticsearch7.3.0启动指定JDK11
解决完了之后在启动es还是报错：
ERROR: [2] bootstrap checks failed [1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
解决方案：修改/etc/sysctl.conf
[root@izm5e1lllyaje4uovv8cbdz /]# vim /etc/sysctl.conf [root@izm5e1lllyaje4uovv8cbdz /]# sysctl -p
添加一行：vm.max_map_count=262144，添加完了执行：sysctl -p，看结果是不是vm.max_map_count = 262144
成功运行的结果是会出现节点一started即可。
[2022-02-25T16:28:29,610][INFO ][o.e.n.Node ] [node-1] started
可能出现localhost:9200 或者127.0.0.1:9200都能访问的情况，但是根据IP：9200就是访问不了，有几个原因：
1）修改elasticsearch.yaml 的 network.host: 0.0.0.0
2）是否开启防火墙，放开9200端口
3）如果是云服务器，需要对专有网络类型的ecs服务器，添加该端口的安全组规则后，重启实例
