elasticsearch启动报错解决办法

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报错内容：

报错一：[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]

• 解决办法：在/etc/security/limits.conf 中添加如下几行：

# config for elasticsearch

elasticsearch - nofile 65536

elasticsearch - nproc 65536

报错二：[2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

• 报错原因：分配给es的内存太小，小于es需要的最小值

• 解决办法：在/etc/sysctl.conf中添加如下几行：

vm.zone_reclaim_mode=0

vm.max_map_count = 262144

vm.swappiness = 1