以下是安装es遇到的问题：阅读需俩分钟
修改elasticsearch-6.1.1/config目录下的elasticsearch.yml文件中的network.host值改为0.0.0.0
用root权限操作
错误1
ERROR: [2] bootstrap checks failed [1]: max file descriptors [65535] for elasticsearch process is too low, increase to at least [65536] [2]: max number of threads [3889] for user [elasticsearch] is too low, increase to at least [4096]
解决问题：
- 通过root用户登录服务器
vi /etc/security/limits.conf- 在文件结尾添加如下内容，其中
elasticsearch上面创建的用户，后面配置的数字就是上面报错信息对应的建议值。
elasticsearch soft nofile 65536 elasticsearch hard nofile 65536 elasticsearch soft nproc 4096 elasticsearch hard nproc 4096
错误2
[1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144] [2018-04-26T09:09:49,533][INFO ][o.e.n.Node] [reyPF0X] stopping ... [2018-04-26T09:09:49,571][INFO ][o.e.n.Node] [reyPF0X] stopped [2018-04-26T09:09:49,571][INFO ][o.e.n.Node] [reyPF0X] closing ... [2018-04-26T09:09:49,593][INFO ][o.e.n.Node] [reyPF0X] closed
解决：
vi /etc/sysctl.conf
2.添加下面配置：
vm.max_map_count=655360
3.执行命令：
sysctl -p
重启，
错误3
启动内存不足，（物理内存不足）
$./bin/elasticsearch Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x0000000085330000, 2060255232, 0) failed; error='Cannot allocate memory' (errno=12) # # There is insufficient memory for the Java Runtime Environment to continue. # Native memory allocation (mmap) failed to map 2060255232 bytes for committing reserved memory. # An error report file with more information is saved as: # /data/elasticsearch-5.2.2/hs_err_pid26945.log
解决方法（调小内存）
# vi ${elasticsearch_HOME}/config/jvm.options #-Xms2g #-Xmx2g -Xms512m -Xmx512m
