問題一：警告提示
[2016-11-06T16:27:21,712][WARN ][o.e.b.JNANatives ] unable to install syscall filter:
java.lang.UnsupportedOperationException: seccomp unavailable: requires kernel 3.5+ with CONFIG_SECCOMP and CONFIG_SECCOMP_FILTER compiled in
at org.elasticsearch.bootstrap.Seccomp.linuxImpl(Seccomp.java:349) ~[elasticsearch-5.0.0.jar:5.0.0]
at org.elasticsearch.bootstrap.Seccomp.init(Seccomp.java:630) ~[elasticsearch-5.0.0.jar:5.0.0]
解決：使用新的linux版本，就不會出現(xiàn)此類問題了。
問題二：ERROR: bootstrap checks failed
max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536]
max number of threads [1024] for user [lishang] likely too low, increase to at least [2048]
解決：切換到root用戶，編輯limits.conf 添加類似如下內(nèi)容
vi /etc/security/limits.conf
添加如下內(nèi)容:
?soft nofile 65536
?hard nofile 131072
?soft nproc 2048
?hard nproc 4096
問題三：max number of threads [1024] for user [lish] likely too low, increase to at least [2048]
解決：切換到root用戶，進入limits.d目錄下修改配置文件。
vi /etc/security/limits.d/90-nproc.conf
修改如下內(nèi)容：
?soft nproc 1024
#修改為
?soft nproc 2048
問題四：max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144]
解決：切換到root用戶修改配置sysctl.conf
vi /etc/sysctl.conf
添加下面配置：
vm.max_map_count=655360
并執(zhí)行命令：
sysctl -p
然后，重新啟動elasticsearch，即可啟動成功。
啟動 elasticsearch 如出現(xiàn)異常? can not run elasticsearch as root
解決方法：創(chuàng)建ES 賬戶，修改文件夾 文件 所屬用戶 組
啟動異常：ERROR: bootstrap checks failed
system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk
解決方法：在elasticsearch.yml中配置bootstrap.system_call_filter為false，注意要在Memory下面:
bootstrap.memory_lock: false
bootstrap.system_call_filter: false
啟動后，如果只有本地可以訪問，嘗試修改配置文件 elasticsearch.yml
中network.host(注意配置文件格式不是以 # 開頭的要空一格， ： 后要空一格)
為 network.host: 0.0.0.0
默認端口是 9200
注意：關閉防火墻 或者開放9200端口
