问题一:警告提示
[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]
报了一大串错误,其实只是一个警告。
解决:使用心得linux版本,就不会出现此类问题了。
问题二: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]
解决:切换到root用户,编辑limits.conf 添加类似如下内容
vi /etc/security/limits.conf
添加如下内容:
* soft nofile 65536
* hard nofile 131072
* soft nproc 2048
* hard nproc 4096
问题三:max number of threads [1024] for user [lish] likely too low, increase to at least [2048]
解决:切换到root用户,进入limits.d目录下修改配置文件。
vi /etc/security/limits.d/90-nproc.conf
修改如下内容:
* soft nproc 1024
#修改为
* soft nproc 2048
问题四:max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144]
解决:切换到root用户修改配置sysctl.conf
vi /etc/sysctl.conf
添加下面配置:
vm.max_map_count=655360
并执行命令:
sysctl -p
问题五:max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536]
解决:修改切换到root用户修改配置limits.conf 添加下面两行
命令:vi /etc/security/limits.conf
* hard nofile 65536
* soft nofile 65536
切换到es的用户。然后,重新启动elasticsearch,即可启动成功。
问题六:ERROR: [1] bootstrap checks failed
[1]: system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk
解决:
Centos6不支持SecComp,而ES5.2.0默认bootstrap.system_call_filter为true
禁用:在elasticsearch.yml中配置bootstrap.system_call_filter为false,注意要在Memory下面:
bootstrap.memory_lock: false
bootstrap.system_call_filter: false
然后,重新启动elasticsearch,即可启动成功。
问题七:Exception in thread "main" java.lang.RuntimeException: don't run elasticsearch as root.
解决:
创建elsearch用户组及elsearch用户
groupadd elsearch
useradd elsearch -g elsearch -p elasticsearch
更改elasticsearch文件夹及内部文件的所属用户及组为elsearch:elsearch
chown -R elsearch:elsearch elasticsearch
elasticsearch
为你elasticsearch的目录名称
切换到elsearch用户再启动
su elsearch #切换账户
cd elasticsearch/bin #进入你的elasticsearch目录下的bin目录
./elasticsearch
问题八、后台运行
最后还有一个小问题,如果你在服务器上安装Elasticsearch,而你想在本地机器上进行开发,这时候,你很可能需要在关闭终端的时候,让Elasticsearch继续保持运行。最简单的方法就是在命令后面加个 -d
注意:1.只有退出当前用户,重新登录即可让之前修改的limits生效,执行如下命令
[root@elsearch~]# ulimit -u
4096
发现修改成功
2.按照以上提示修改文件,配置具体大小要根据具体提示信息来进行配置