环境
- CentOS7
- 请确保已经安装了jdk1.8或更高的版本
下载
选择要下载的,我下载的是TAR
。按需要下载。
解压
我已经将安装包放在了usr/local/software
目录下。
[root@localhost software]# pwd
/usr/local/software
[root@localhost software]# ls
elasticsearch-6.3.2.tar.gz
解压安装包,得到 elasticsearch-6.3.2
。
tar -zxvf elasticsearch-6.3.2.tar.gz
我将elasticsearch-6.3.2
移动到了usr/local/dev-env
目录下。
[root@localhost dev-env]# pwd
/usr/local/dev-env
[root@localhost dev-env]# mv /usr/local/software/elasticsearch-6.3.2 elasticsearch-6.3.2
[root@localhost dev-env]# ls
elasticsearch-6.3.2 jdk1.8.0_181
启动异常
当我在elastic下执行./bin/elasticsearch
,启动elastic的时候,报了一下错误:
[2018-08-09T18:11:32,675][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:140) ~[elasticsearch-6.3.2.jar:6.3.2]
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:127) ~[elasticsearch-6.3.2.jar:6.3.2]
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.3.2.jar:6.3.2]
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.3.2.jar:6.3.2]
at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.3.2.jar:6.3.2]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) ~[elasticsearch-6.3.2.jar:6.3.2]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:86) ~[elasticsearch-6.3.2.jar:6.3.2]
Caused by: java.lang.RuntimeException: can not run elasticsearch as root
at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:104) ~[elasticsearch-6.3.2.jar:6.3.2]
at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:171) ~[elasticsearch-6.3.2.jar:6.3.2]
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:326) ~[elasticsearch-6.3.2.jar:6.3.2]
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-6.3.2.jar:6.3.2]
... 6 more
创建用户
从上面可以看出,我们不能用root来启动es,那么我们就新建一个用户
# 添加用户 elastic
adduser elastic
# 给用户elastic设置密码,按照提示输入自己的密码
passwd elastic
# 设置权限
chown -R elastic /usr/local/dev-env/elasticsearch-6.3.2
# 切换用户
su elastic
# 查看权限
ll
启动elasticsearch
./bin/elasticsearch
## 以守护进程在后台运行
./bin/elasticsearch -d
测试启动结果
执行以下操作,查看输出
curl 'http://localhost:9200'
当然在执行时,可能会碰到下面问题
curl: (7) Failed connect to localhost:9200; Connection refused
我们只需要关闭防火墙
service firewalld stop
然后再运行,我们可以看到输出如下内容:
{
"name" : "7KfHH2X",
"cluster_name" : "elasticsearch",
"cluster_uuid" : "XihaCbM2Q9Sk3w6yJRhHEw",
"version" : {
"number" : "6.3.2",
"build_flavor" : "default",
"build_type" : "tar",
"build_hash" : "053779d",
"build_date" : "2018-07-20T05:20:23.451332Z",
"build_snapshot" : false,
"lucene_version" : "7.3.1",
"minimum_wire_compatibility_version" : "5.6.0",
"minimum_index_compatibility_version" : "5.0.0"
},
"tagline" : "You Know, for Search"
}
外部访问
上面的设置只能在本地上能访问。我的linux是按照在虚拟机上的,现在我要在电脑的浏览器上访问。我们发现是不行的。那么我们需要新的设置
修改elasticsearch目录下的config/elasticsearch.yml
文件
# 设置所有ip都能访问
network.host: 0.0.0.0
http.port: 9200
其他问题
当我们设置好上面的配置是,又出现了其他的问题,下面一个个的处理
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]
上面出现了两个问题,我们一个个的处理。我们先切回到root
用户。
- 问题 [1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
修改文件/etc/security/limits.conf
,在其后面追加如下内容:
* soft nofile 65536
* hard nofile 65536
- 问题 [2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
修改文件 /etc/sysctl.conf
, 在其后面追加如下内容:
vm.max_map_count=655360
使用命令 sysctl -p
使刚才的设置生效。
最后,我们切换到elastic
用户,并启动服务./bin/elasticsearch
,我们发现启动成功,并且能在其他的机器上访问到es了。
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