ES 安装部署 之 句柄数配置

elasticsearch 分配的内存资源太低，无法启动，报错 too low

[2020-02-15T17:21:22,267][INFO ][o.e.x.s.a.s.FileRolesStore] [bS0fjGz] parsed [0] roles from file [/opt/ES/elasticsearch-6.3.1/config/roles.yml]
[2020-02-15T17:21:22,593][INFO ][o.e.x.m.j.p.l.CppLogMessageHandler] [controller/38241] [Main.cc@109] controller (64 bit): Version 6.3.1 (Build 4d0b8f0a0ef401) Copyright (c) 2018 Elasticsearch BV
[2020-02-15T17:21:22,818][DEBUG][o.e.a.ActionModule       ] Using REST wrapper from plugin org.elasticsearch.xpack.security.Security
[2020-02-15T17:21:22,998][INFO ][o.e.d.DiscoveryModule    ] [bS0fjGz] using discovery type [zen]
[2020-02-15T17:21:23,550][INFO ][o.e.n.Node               ] [bS0fjGz] initialized
[2020-02-15T17:21:23,550][INFO ][o.e.n.Node               ] [bS0fjGz] starting ...
[2020-02-15T17:21:33,680][INFO ][o.e.t.TransportService   ] [bS0fjGz] publish_address {192.168.0.88:9300}, bound_addresses {192.168.0.88:9300}
[2020-02-15T17:21:33,693][INFO ][o.e.b.BootstrapChecks    ] [bS0fjGz] bound or publishing to a non-loopback address, enforcing bootstrap checks
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]
[2020-02-15T17:21:33,706][INFO ][o.e.n.Node               ] [bS0fjGz] stopping ...
[2020-02-15T17:21:33,747][INFO ][o.e.n.Node               ] [bS0fjGz] stopped
[2020-02-15T17:21:33,747][INFO ][o.e.n.Node               ] [bS0fjGz] closing ...
[2020-02-15T17:21:33,761][INFO ][o.e.n.Node               ] [bS0fjGz] closed
[2020-02-15T17:21:33,763][INFO ][o.e.x.m.j.p.NativeController] Native controller process has stopped - no new native processes can be started

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解决办法：两步

第一步，修改配置文件 /etc/security/limits.conf   ：

[root@chxlay ~]# cd /etc/security/
[root@chxlay security]# ll
总用量 68
-rw-r--r--. 1 root root 4620 11月  6 2016 access.conf
-rw-r--r--. 1 root root   82 11月  6 2016 chroot.conf
drwxr-xr-x. 2 root root 4096 2月  15 12:51 console.apps
-rw-r--r--. 1 root root  604 11月  6 2016 console.handlers
-rw-r--r--. 1 root root  939 11月  6 2016 console.perms
drwxr-xr-x. 2 root root 4096 11月  6 2016 console.perms.d
-rw-r--r--. 1 root root 3635 11月  6 2016 group.conf
-rw-r--r--. 1 root root 2422 11月  6 2016 limits.conf
drwxr-xr-x. 2 root root 4096 2月  15 12:50 limits.d
-rw-r--r--. 1 root root 1440 11月  6 2016 namespace.conf
drwxr-xr-x. 2 root root 4096 11月  6 2016 namespace.d
-rwxr-xr-x. 1 root root 1019 11月  6 2016 namespace.init
-rw-------. 1 root root    0 11月  6 2016 opasswd
-rw-r--r--. 1 root root 2972 11月  6 2016 pam_env.conf
-rw-r--r--. 1 root root 1718 12月  7 2011 pwquality.conf
-rw-r--r--. 1 root root  419 11月  6 2016 sepermit.conf
-rw-r--r--. 1 root root 2179 11月  6 2016 time.conf

系统默认值为 65535

 属性解释：

nofile - 打开文件的最大数目

noproc - 进程的最大数目

soft 指的是当前系统生效的设置值

hard 表明系统中所能设定的最大值

修改：

* hard nofile 655360

* soft nofile 131072

* hard nproc 4096

* soft nproc 2048

[root@chxlay security]# vim limits.conf

#*               soft    core            0
#*               hard    rss             10000
#@student        hard    nproc           20
#@faculty        soft    nproc           20
#@faculty        hard    nproc           50
#ftp             hard    nproc           0
#@student        -       maxlogins       4
 
* hard nofile 655360
* soft nofile 131072
* hard nproc 4096
* soft nproc 2048
 
# 所有配置数据 一定要写在 之前，# End of file 否则白搭，不要以为 End of file 是一个注释，其实配置文件在他以下的都无效
# End of file
 
 
# 阿里云主机则在 End of file 下面还有这段配置，以这段配置为准
root soft nofile 65535   
root hard nofile 65535 
* soft nofile 65535                 #（需要修改为 >= 65536）
* hard nofile 65535                 #（需要修改为 >= 65536）

刷新配置文件（无视报错地方）：source /etc/security/limits.conf

[root@chxlay security]# source /etc/security/limits.conf 
bash: access.conf: 未找到命令...
bash: access.conf: 未找到命令...
bash: access.conf: 未找到命令...
bash: access.conf: 未找到命令...

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第二步

修改系统配置：  etc/sysctl.conf

[root@chxlay security]# cd /etc/
[root@chxlay etc]# ll sysctl.conf 
-rw-r--r--. 1 root root 449 8月   4 2017 sysctl.conf

 

 vm.max_map_count=655360

fs.file-max=655360

vm.max_map_count=655360，因此缺省配置下，单个jvm能开启的最大线程数为其一半

file-max是设置 系统所有进程一共可以打开的文件数量

# sysctl settings are defined through files in
# /usr/lib/sysctl.d/, /run/sysctl.d/, and /etc/sysctl.d/.
#
# Vendors settings live in /usr/lib/sysctl.d/.
# To override a whole file, create a new file with the same in
# /etc/sysctl.d/ and put new settings there. To override
# only specific settings, add a file with a lexically later
# name in /etc/sysctl.d/ and put new settings there.
#
# For more information, see sysctl.conf(5) and sysctl.d(5).
 
vm.max_map_count=655360
fs.file-max=655360

刷新：sysctl -p

vm.max_map_count = 655360
fs.file-max = 655360