elasticsearch 7安装

问题提前报

max virtual memory areas error

max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

如果您的环境是Linux，注意要做以下操作，否则es可能会启动失败
1 用编辑工具打开文件/etc/sysctl.conf
2 在尾部添加一行配置vm.max_map_count = 262144，如果已存在就修改，数值不能低于262144
3 修改保存，然后执行命令sudo sysctl -p使其立即生效

heap size error

initial heap size [1073741824] not equal to maximum heap size [4294967296]; this can cause resize pauses and prevents mlockall from locking the entire heap

原因是 ES_JAVA_OPTS 设置错误，前后必须相同，如
-Xms3g -Xmx3g

手动安装es

下载

wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.17.15-linux-x86_64.tar.gz

解压

tar -zxvf elasticsearch-7.17.15-linux-x86_64.tar.gz
mv elasticsearch-7.17.15 /usr/local/elasticsearch

添加用户

useradd es
passwd es
chown -R es:es /usr/local/elasticsearch

配置文件修改

vim elasticsearch.yml

network.host: 0.0.0.0
http.port: 9200
discovery.seed_hosts: "[::1]"
cluster.initial_master_nodes: ["node-1"]

启动

/usr/local/elasticsearch/bin/elasticsearch -d

访问验证

http://127.0.0.1:9200/