解决elasticsearch配置network.host: 0.0.0.0导致elasticsearch服务启动不成功的问题

异常1：网页192.168.5.145：9200无法进入

解决方法：

  1. #关闭防火墙
  2. systemctl stop firewalld.service #关闭防火墙
  3. systemctl disable firewalld.service #关闭自启
  4. systemctl status firewalld.service #查看防火墙状态

异常2：无法启动bin目录下elasticsearch脚本

RuntimeException[Java version: 1.8.0….

解决方法：

下载较新版本的jdk

异常3：无法效验elasticsearch压缩文档

问题：-bash: shasum: 未找到命令….

解决方法：

  1. yum -y install perl-Digest-SHA

异常4：[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]

解决办法：

转到root用户，vim /etc/security/limits.conf

  1. * soft nofile 65535
  2. * hard nofile 65535

异常5：[2]: max number of threads [3818] for user [admin] is too low, increase to at least [4096]

解决办法：

转到root用户，vim /etc/security/limits.conf

  1. * soft nproc  4096
  2. * hard nproc  4096

异常6：[3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

解决办法：

转到root用户，vim /etc/sysctl.conf

  1.  vm.max_map_count=262144

异常7：[4]: 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

解决办法：

转到root用户，vim /opt/ela/config/elasticsearch.yml

  1. cluster.initial_master_nodes: ["node-1"]

异常8：运行elasticsearch脚本出现大量的at org.elasticsearch.cluster.node.DiscoveryNodes$Builder.add(DiscoveryNodes.java:618) ~[elasticsearch-7.10.0.jar:7.10.0]

解决办法：

转到root用户，删除从节点上的data目录