Q: can not run elasticsearch as root?
A: 因为elasticsearch不能再root下运行,我们需要创建一个用户和用户组,然后将elasticsearch用户组和用户变更,具体操作如下:
adduser elasticsearch
groupadd elasticsearch
chown -R elasticsearch:elasticsearch elasticsearch-6.8.6
Q: max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144] (最大虚拟内存太小)
A: root@localhost vim /etc/sysctl.conf
编辑以下内容:vm.max_map_count=655360
执行以下命令sysctl -p
Q:max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536] (无法创建本地文件问题,用户最大可创建文件数太小 )
#root@localhost vim /etc/security/limits.conf
#编辑以下内容:
soft nofile 65536
hard nofile 131072
soft nproc 2048
hard nproc 4096
Q:max number of threads [1024] for user [lish] likely too low, increase to at least [2048] (无法创建本地线程问题,用户最大可创建线程数太小)
A:#root@localhost vim /etc/security/limits.d/90-nproc.conf
#编辑以下内容:
soft nproc2048
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