# 下载ElasticSearch
# wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.17.10-linux-x86_64.tar.gz

# 解压安装包
# tar -xzvf elasticsearch-7.17.10-linux-x86_64.tar.gz
# mv elasticsearch-7.17.10 /opt/elasticsearch

# 创建用户
# useradd elasticsearch
# chown -R elasticsearch:elasticsearch /opt/elasticsearch

# 创建数据和日志目录
# mkdir -p /var/lib/elasticsearch /var/log/elasticsearch
# chown -R elasticsearch:elasticsearch /var/lib/elasticsearch /var/log/elasticsearch

# 编辑elasticsearch.yml配置文件
# vi /opt/elasticsearch/config/elasticsearch.yml

cluster.name: my-cluster
node.name: node-1
path.data: /var/lib/elasticsearch
path.logs: /var/log/elasticsearch
network.host: 0.0.0.0
http.port: 9200
discovery.type: single-node

# 配置JVM参数
# vi /opt/elasticsearch/config/jvm.options
-Xms16g
-Xmx16g

# 启动ElasticSearch服务
# su – elasticsearch -c “/opt/elasticsearch/bin/elasticsearch -d”

# 设置开机自启
# vi /etc/systemd/system/elasticsearch.service
[Unit]
Description=Elasticsearch
After=network.target

[Service]
Type=simple
User=elasticsearch
ExecStart=/opt/elasticsearch/bin/elasticsearch
Restart=on-failure

[Install]
WantedBy=multi-user.target

# 启用服务
# systemctl daemon-reload
# systemctl enable elasticsearch
# systemctl start elasticsearch

# 验证服务状态
# systemctl status elasticsearch

# 检查ElasticSearch状态
# curl http://localhost:9200
{
“name” : “node-1”,
“cluster_name” : “my-cluster”,
“cluster_uuid” : “abcdef123456”,
“version” : {
“number” : “7.17.10”,
“build_flavor” : “default”,
“build_type” : “tar”,
“build_hash” : “1234567”,
“build_date” : “2023-02-08T15:21:16.449963995Z”,
“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”
}

# 测试索引操作
# 创建索引
# curl -X PUT “localhost:9200/test-index”

# 插入数据
# curl -X POST “localhost:9200/test-index/_doc/1” -H “Content-Type: application/json” -d ‘{“name”: “test”, “value”: 123}’

# 查询数据
# curl -X GET “localhost:9200/test-index/_doc/1”

# 检查集群状态
# curl http://localhost:9200/_cluster/health

# 创建备份目录
# mkdir -p /backup/elasticsearch
# chown -R elasticsearch:elasticsearch /backup/elasticsearch

# 配置快照仓库
# curl -X PUT “localhost:9200/_snapshot/my_backup” -H “Content-Type: application/json” -d ‘{
“type”: “fs”,
“settings”: {
“location”: “/backup/elasticsearch”
}
}’

# 创建快照
# curl -X PUT “localhost:9200/_snapshot/my_backup/snapshot_1”

# 查看快照
# curl -X GET “localhost:9200/_snapshot/my_backup/snapshot_1”

# 配置自动备份
# 创建备份脚本
# vi /root/backup_elasticsearch.sh

#!/bin/bash

DATE=$(date +%Y%m%d)

# 创建快照
curl -X PUT “localhost:9200/_snapshot/my_backup/snapshot_$DATE”

# 清理30天前的快照
curl -X DELETE “localhost:9200/_snapshot/my_backup/snapshot_$(date -d ’30 days ago’ +%Y%m%d)”

# 给脚本添加执行权限
# chmod +x /root/backup_elasticsearch.sh

# 添加到crontab
# crontab -e

# 添加以下内容（每天凌晨2点执行备份）
0 2 * * * /root/backup_elasticsearch.sh