Elasticsearch6.4.3安装
Linux内存一定要1g以上！
首先要有jdk环境 要求1.8版本以上 elasticsearch是Java写的
将上传的 elasticSearch安装包解压
cd /home/elasticsearch/elasticsearch-6.4.3/config
1、 修改elasticsearch.yml
network.host: 192.168.91.7
http.port:9200 #这是HTTP协议外部通信的端口号 9300内部通信端口号
如果此时启动，会报错 root不能启动的哦 不能通过root账号启动 这是属于自身的安全策略，解决方案，非root就可以了哈哈
因为安全问题elasticsearch 不让用root用户直接运行，所以要创建新用户
首先创建个分组： groupadd esUsers
useradd esUser01 -g esUsers -p 123
chown -R esUser01:esUsers elasticsearch-6.4.3
su esUser01 #切换登录用户
【参考：
第一步：liunx创建新用户 adduser esUsers 然后给创建的用户加密码 passwd XXX 输入两次密码。
第二步：切换刚才创建的用户 su esUsers 然后执行elasticsearch 会显示Permission denied 权限不足。
第三步：给新建的XXX赋权限，chmod 777 * 这个不行，因为这个用户本身就没有权限，肯定自己不能给自己付权限。所以要用root用户登录付权限。
第四步：root给esUser赋权限，chown -R XXX /你的elasticsearch安装目录。
然后执行成功。】
这样启动仍然是会报错的
ERROR: [4] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
[2]: max number of threads [1024] for user [esUser01] 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]
[4]: system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk
[2019-01-21T00:53:47,296][INFO ][o.e.n.Node ] [qKdHOzq] stopping ...
[2019-01-21T00:53:47,329][INFO ][o.e.n.Node ] [qKdHOzq] stopped
[2019-01-21T00:53:47,330][INFO ][o.e.n.Node ] [qKdHOzq] closing ...
[2019-01-21T00:53:47,355][INFO ][o.e.n.Node ] [qKdHOzq] closed
[2019-01-21T00:53:47,361][INFO ][o.e.x.m.j.p.NativeController] Native controller process has stopped - no new native processes can be started
解决方案：
用root权限去做！
vi /etc/sysctl.conf
添加： vm.max_map_count=655360 然后保存
然后 cd /etc
输入: sysctl -p
继续启动，继续报错：
ERROR: [3] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
[2]: max number of threads [1024] for user [esUser01] is too low, increase to at least [4096]
[3]: system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk
[2019-01-21T01:03:48,953][INFO ][o.e.n.Node ] [qKdHOzq] stopping ...
[2019-01-21T01:03:48,988][INFO ][o.e.n.Node ] [qKdHOzq] stopped
[2019-01-21T01:03:48,988][INFO ][o.e.n.Node ] [qKdHOzq] closing ...
[2019-01-21T01:03:49,010][INFO ][o.e.n.Node ] [qKdHOzq] closed
[2019-01-21T01:03:49,017][INFO ][o.e.x.m.j.p.NativeController] Native controller process has stopped - no new native processes can be started
解决方案：继续用root去修改
vi /etc/security/limits.conf
加入：
* soft nofile 65536
* hard nofile 131072
* soft nproc 2048
* hard nproc 4096
必须重启！ 重启才可以生效
继续报错！
[1]: max number of threads [1024] for user [esUser01] is too low, increase to at least [4096]
解决：root下
vi /etc/security/limits.d/90-nproc.conf
在操作时候竟然出现了错误：
Exception in thread "main" 2019-01-21 00:46:41,393 main ERROR No Log4j 2 configuration file found. Using default configuration (logging only errors to the console), or user programmatically provided configurations. Set system property 'log4j2.debug' to show Log4j 2 internal initialization logging. See https://logging.apache.org/log4j/2.x/manual/configuration.html for instructions on how to configure Log4j 2
ElasticsearchParseException[malformed, expected end of settings but encountered additional content starting at line number: [59], column number: [1]]; nested: MarkedYAMLException[expected '<document start>', but found BlockMappingStart
in 'reader', line 59, column 1:
http.port: 9200
^
at [Source: sun.nio.ch.ChannelInputStream@5fbe4146; line: 59, column: 1]]; nested: ParserException[expected '<document start>', but found BlockMappingStart
in 'reader', line 59, column 1:
http.port: 9200
^
];
at org.elasticsearch.common.settings.Settings.fromXContent(Settings.java:685)
at org.elasticsearch.common.settings.Settings.access$500(Settings.java:84)
at org.elasticsearch.common.settings.Settings$Builder.loadFromStream(Settings.java:1188)
at org.elasticsearch.common.settings.Settings$Builder.loadFromPath(Settings.java:1165)
at org.elasticsearch.node.InternalSettingsPreparer.prepareEnvironment(InternalSettingsPreparer.java:100)
at org.elasticsearch.cli.EnvironmentAwareCommand.createEnv(EnvironmentAwareCommand.java:95)
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124)
at org.elasticsearch.cli.Command.main(Command.java:90)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:86)
Caused by: com.fasterxml.jackson.dataformat.yaml.snakeyaml.error.MarkedYAMLException: expected '<document start>', but found BlockMappingStart
in 'reader', line 59, column 1:
http.port: 9200
^
这个错误竟然是空格造成的！ 醉了 这种格式 很让人不开心啊
解决方案：
启动，继续报错！！
system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk
分析和解决：
出现错误的原因：是因为centos6.x操作系统不支持SecComp，而elasticsearch 5.5.2默认bootstrap.system_call_filter为true进行检测，所以导致检测失败，失败后直接导致ES不能启动。
在elasticsearch.yml中添加配置项：bootstrap.system_call_filter为false：
bootstrap.system_call_filter: false
此时可以完美解决了！
启动成功！
关闭防火墙后访问：
http://192.168.91.7:9200/
9200端口可以提供Restful api接口 进行增删改查操作
下面安装可视化界面： Kibana
Kibana是一个开源的分析和可视化平台，设计用于和Elasticsearch一起工作。
你用Kibana来搜索，查看，并和存储在Elasticsearch索引中的数据进行交互。
你可以轻松地执行高级数据分析，并且以各种图标、表格和地图的形式可视化数据。
Kibana使得理解大量数据变得很容易。它简单的、基于浏览器的界面使你能够快速创建和共享动态仪表板，实时显示Elasticsearch查询的变化。
解压安装包后修改配置文件：
vim config/kibana.yml
# 将默认配置改成如下：
server.port: 5601
server.host: "192.168.91.7"
elasticsearch.url: "http:// 192.168.91.7:9200" # 如果是集群 写集群地址
（自己的ip端口号 和 读取的 es的ip端口号）
启动Kibana
./bin/kibana
http://192.168.91.7:5601/app/kibana
1.查找ES进程
ps -ef | grep elastic
2.杀掉ES进程
kill -9 2382（进程号）
3.重启ES
sh elasticsearch -d
