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

問題原因：因為Centos6不支援SecComp，而ES預設bootstrap.system_call_filter為true進行檢測，所以導致檢測失敗，失敗後直接導致ES不能啟動。詳見 ：https://github.com/elastic/elasticsearch/issues/22899

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

ERROR: [2] bootstrap checks failed

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

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

啟動報這個錯誤；

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

修改/etc/security/limits.conf檔案，新增或修改如下行： （請切換到root使用者 然後強制修改檔案）

*        hard    nofile           65536

*        soft    nofile           65536

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

$ sudo sysctl -w vm.max_map_count=2621441

或者修改 /etc/sysctl.conf 檔案，新增 “vm.max_map_count”設定 永久改變(sudo sysctl -p /etc/sysctl.conf生效)。

設定後，重啟伺服器，可以使用