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ElasticSearch install

  • 使用rpm包安装

      $ rpm -ivh elasticsearch-7.5.1-x86_64.rpm 
  warning: elasticsearch-7.5.1-x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID d88e42b4: NOKEY
  Preparing...                ########################################### [100%]
  Creating elasticsearch group... OK
  Creating elasticsearch user... OK
     1:elasticsearch          ########################################### [100%]
  ### NOT starting on installation, please execute the following statements to configure elasticsearch service to start automatically using chkconfig
   sudo chkconfig --add elasticsearch
  ### You can start elasticsearch service by executing
   sudo service elasticsearch start
  future versions of Elasticsearch will require Java 11; your Java version from [/usr/local/java/jdk1.8.0_231/jre] does not meet this requirement
  Created elasticsearch keystore in /etc/elasticsearch

  • 安装目录 /usr/share/elasticsearch/

  • 配置文件目录 /etc/elasticsearch/

  • 启动 ./bin/elasticsearch -d

  • 启动报错

    • error1:(修改配置文件)

        [cluster.initial master nodes] is empty on this node

    • error2:(修改配置文件)

        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

    • max number of threads [1024] for user [es] likely too low, increase to at least [4096] 原因：无法创建本地线程问题,用户最大可创建线程数太小 解决方案：切换到root用户，进入limits.d目录下，修改90-nproc.conf 配置文件。

        vi /etc/security/limits.d/90-nproc.conf
  #找到如下内容：
  * soft nproc 1024
  #修改为
  * soft nproc 4096