Error Messages:

ERROR: [1] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]
[2]: max number of threads [3795] for user [es] 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]

Problem Cause.
es higher versions of resource requirements, linux system default configuration can not meet its requirements, so it needs to be configured separately
Solution.
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]
Modify the vi /etc/security/limits.conf file and add the configuration

* hard nofile 65535  # *can be es start user
* soft nofile 65535

[2]: max number of threads [3795] for user [es] is too low, increase to at least [4096]
Modify the vi /etc/security/limits.conf file and add the configuration

es - nproc 4096 # es is my start user

After the above two configuration items are changed, ES start the user and login again will take effect;

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

Modify /etc/sysctl.config file, add the following configuration

vi /etc/sysctl.conf 

vm.max_map_count=262144

Execute the order with immediate effect

/sbin/sysctl -p
vm.max_map_count = 262144

​

Start successful