elasticsearch5.x下载与启动
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下载
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.5.1.tar.gz
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解压
tar -xzvf elasticsearch-5.5.1.tar.gz -
创建非ROOT用户，并授权
chown -R yt elasticsearch-5.5.1 -
修改配置elasticsearch.yml
network.host: 127.0.0.1,192.168.137.128 http.cors.enabled: true http.cors.allow-origin: “*” cluster.name: “yt-es” -
启动es
/bin/elasticsearch-
出现错误:
ERROR:bootstrap checks failed max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536] max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
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错误1：linux默认es操作文件句柄数太小
vi /etc/security/limits.conf yt hard nofile 65536 yt soft nofile 65536yt是es启动用户名，并用以下命令查看是否修改成功
ulimit -Hn -
错误2：是操作系统的vm.max_map_count参数设置太小导致的，请使用root用户登录系统，执行以下命令：
sysctl -w vm.max_map_count=655360并用以下命令查看是否修改成功
sysctl -a | grep “vm.max_map_count” -
OpenJDK 64-Bit Server VM warning: INFO: os::commit_memory(0x0000000085330000, 2060255232, 0) failed; error=’Cannot allocate memory’ (errno=12)这个错误是虚拟机分配es内存不足，因为是在测试搭建es，需要把内存有2g改小到512m,正式环境还需调整为更大数值。
vi es/config/jvm.options
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/bin/elasticsearch
再次启动，重启访问正常。
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集群安装
修改配置elasticsearch.yml
network.host: 127.0.0.1,192.168.137.128 http.port: 9200 transport.tcp.port: 9300 http.cors.enabled: true http.cors.allow-origin: “*” cluster.name: “yt-es” node.master: true node.data: true http.enabled: true discovery.zen.ping.unicast.hosts: [“192.168.137.128:9300”,”192.168.137.128:9301”,”192.168.137.128:9302”]删除es下面因为启动生成的data文件，然后复制多份，修改为集群配置，启动集群。
