这里以官方提供的默认版本 Elasticsearch v7.17.0 为例进行学习笔记的记录
打算应用到项目中，作为APP埋点数据的存储、查询统计
下载地址
官方教程
安装配置官方教程
elasticsearch.yml 用户配置
解压
tar zxvf elasticsearch-7.17.0-linux-x86_64.tar.gz2. 修改 elasticsearch.yml 配置文件
开启自动创建索引，添加如下配置
action.auto_create_index: .monitoring*,.watches,.triggered_watches,.watcher-history*,.ml* # 启动时锁定内存 bootstrap.memory_lock: true3. 修改 jvm.options
设置合适的堆内存大小，默认是4GB，由于是开发服务器，我这里先配置1GB
以es用户启动应用（直接以root启动会报错）
创建用户组及用户
groupadd es useradd es -g es passwd es
更改es文件夹及内部文件的所属用户及组为es:es
chown -R es:es elasticsearch-7.17.0/
4.3 切换到es用户并启动
su es ./bin/elasticsearch5. 启动报错
ERROR: [3] bootstrap checks failed. You must address the points described in the following [3] lines before starting Elasticsearch. bootstrap check failure [1] of [3]: memory locking requested for elasticsearch process but memory is not locked bootstrap check failure [2] of [3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144] bootstrap check failure [3] of [3]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured ERROR: Elasticsearch did not exit normally - check the logs at /usr/local/elasticsearch-7.17.0/logs/elasticsearch.log5.1. memory locking requested for elasticsearch process but memory is not locked
修改文件/etc/security/limits.conf，最后添加以下内容
# es用户组可以打开的最大的文件描述符数量，默认1024，这里的数值会限制tcp连接 # soft 是警告值，hard是阀值、超过则报错，* 代表所有用户 @es soft nofile 65536 @es hard nofile 65536 # es用户组可以打开的最大进程数 @es soft nproc 32000 @es hard nproc 32000 # 不限制锁定内存大小 @es hard memlock unlimited @es soft memlock unlimited
● 修改文件 /etc/systemd/system.conf
DefaultLimitNOFILE=65536 DefaultLimitNPROC=32000 DefaultLimitMEMLOCK=infinity5.2. max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
● 修改 /etc/sysctl.conf，末尾添加如下配置
vm.max_map_count=262144
reboot重启后前两个异常解决了
5.3. the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured添加集群配置，参考官方配置文件
# 集群名称 cluster.name: deao-es-cluster # 节点名称 node.name: node18 # 集群节点列表，多个节点逗号隔开 discovery.seed_hosts: ["192.168.2.18:9300"] # 初始化master节点 cluster.initial_master_nodes: ["192.168.2.18:9300"]6. 启动
# 以守护线程启动es ./bin/elasticsearch -d -p pid # 结束进程 pkill -F pid
-d 以守护线程启动
-p 记录进程ID到pid文件
PS: 记得给防火墙开启 9200 的web端口和 9300 的通信端口
OK，这算是部署完毕了
