1. Elasticsearch如果启动在127.0.0.1的话,可以启动成功
2. Elasticsearch如果要跨机器通讯,需要监听在真实网卡上
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
[2]: max number of threads [3829] for user [elk] is too low, increase to at least [4096]
[3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
最大文件打开数调整/etc/security/limits.conf
最大打开进程数调整/etc/security/limits.d/20-nproc.conf
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