Centos7安装Elasticsearch

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$ wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.9.0-linux-x86_64.tar.gz
$ tar -zxvf elasticsearch-7.9.0-linux-x86_64.tar.gz -C /usr/local/

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$ cd /usr/local/elasticsearch-7.9.0/
$ mkdir data

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$ vim /usr/local/elasticsearch-7.9.0/config/elasticsearch.yml
### 加入以下内容

#设置集群名称
cluster.name: kute-elasticsearch
#设置节点名称
node.name: es-node1
#设置数据存储路径
path.data: /usr/local/elasticsearch-7.9.0/data
#设置日志存储路径
path.logs: /usr/local/elasticsearch-7.9.0/logs
# 允许其他机器访问
network.bind_host: 0.0.0.0
#设置绑定ip，设置为0.0.0.0外网都能访问
network.host: 172.16.77.26
#初始化主节点
cluster.initial_master_nodes: ["es-node1"]

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$ useradd esuser   #添加用户
$ chown -R esuser:esuser /usr/local/elasticsearch-7.9.0/   #对该目录授权

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$ su - esuser
$ /usr/local/elasticsearch-7.9.0/bin/elasticsearch

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ERROR: [1] bootstrap checks failed
[1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
ERROR: Elasticsearch did not exit normally - check the logs at /usr/local/elasticsearch-7.9.0/logs/imooc-elasticsearch.log

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$ su - root

$ vim /etc/security/limits.conf
#加入以下内容
* soft nofile 65535
* hard nofile 131072
* soft nproc 2048
* hard nproc 4096


####修改sysctl.conf配置文件
$ vim /etc/sysctl.conf
#加入以下内容
vm.max_map_count=262145


###刷新配置文件
$ sysctl -p

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$ su - esuser
$ /usr/local/elasticsearch-7.9.0/bin/elasticsearch

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$ curl 'http://localhost:9200/?pretty'
{
  "name" : "es-node1",
  "cluster_name" : "imooc-elasticsearch",
  "cluster_uuid" : "atFS8kRvRwSSzOktU-8KyA",
  "version" : {
    "number" : "7.9.0",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "a479a2a7fce0389512d6a9361301708b92dff667",
    "build_date" : "2020-08-11T21:36:48.204330Z",
    "build_snapshot" : false,
    "lucene_version" : "8.6.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

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$ /usr/local/elasticsearch-7.9.0/bin/elasticsearch -d

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$ vim /usr/lib/systemd/system/elasticsearch.service

###写入以下内容
[Unit]

Description=elasticsearch
Documentation=https://www.elastic.co
After=network.target

[Service]

Type=simple

User=esuser

Group=esuser

LimitNOFILE=100000

LimitNPROC=100000

Restart=no

ExecStart=/usr/local/elasticsearch-7.9.0/bin/elasticsearch

PrivateTmp=true

[Install]

WantedBy=multi-user.target



###以服务启动es
$ systemctl daemon-reload
$ systemctl enable elasticsearch.service
$ systemctl start elasticsearch.service

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$ wget  https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.9.0-x86_64.rpm 

$ wget  https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.9.0-x86_64.rpm.sha512

###检查sha512校验和
$ sha512sum -c elasticsearch-7.9.0-x86_64.rpm.sha512
elasticsearch-7.9.0-x86_64.rpm: OK

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$ rpm -ivh elasticsearch-7.9.0-x86_64.rpm
warning: elasticsearch-7.9.0-x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID d88e42b4: NOKEY
Preparing...                          ################################# [100%]
Creating elasticsearch group... OK
Creating elasticsearch user... OK
Updating / installing...
   1:elasticsearch-0:7.9.0-1          ################################# [100%]
### NOT starting on installation, please execute the following statements to configure elasticsearch service to start automatically using systemd
 sudo systemctl daemon-reload
 sudo systemctl enable elasticsearch.service
### You can start elasticsearch service by executing
 sudo systemctl start elasticsearch.service
Created elasticsearch keystore in /etc/elasticsearch/elasticsearch.keystore



###以服务方式启动Kibana
$ systemctl daemon-reload
$ systemctl enable elasticsearch.service
$ systemctl start elasticsearch.service

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$ vim /etc/elasticsearch/elasticsearch.yml

### 改为以下内容

#设置集群名称
cluster.name: kute-elasticsearch
#设置节点名称
node.name: es-node1
###注意，如果修改数据、日志存储路径，一定要提前创建对应目录 并将权限赋予给elasticsearch用户和组
#设置数据存储路径
path.data: /var/lib/elasticsearch
#设置日志存储路径
path.logs: /var/log/elasticsearch
# 允许其他机器访问
network.bind_host: 0.0.0.0
#设置绑定ip，设置为0.0.0.0外网都能访问
network.host: 172.16.77.26
#初始化主节点
cluster.initial_master_nodes: ["es-node1"]


###然后重启elasticsearch
$ systemctl daemon-reload
$ systemctl restart elasticsearch.service

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###这里做了一些修改
$ git clone https://github.com/mobz/elasticsearch-head.git
$ cd elasticsearch-head
$ npm install
$ npm run start

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$ vim /usr/local/elasticsearch-7.9.0/config/elasticsearch.yml
###加入以下内容  然后重启ES
# 监听端口（默认）
http.port: 9200
# # 增加参数，使head插件可以访问es
http.cors.enabled: true
http.cors.allow-origin: "*"


###重启ES后再启动ES-HEAD
$ npm run start