Elasticsearch之 cerebro 安装配置详细使用

运行环境：
CentOS 7.6
Elasticsearch 6.8.4软件下载：
https://github.com/lmenezes/cerebro/releases概述：
cerebro is an open source(MIT License) elasticsearch web admin tool built using Scala, Play Framework, AngularJS and Bootstrap.
celebro 是一个Elasticsearch的web 管理工具，基于scala，play框架和angularJS和Bootstrap前端工具构建。可以看到cerebro是对Elastic监控的工具，和对Elastic操作的工具。安装需求：
需要安装Java 8版本
## java -version
java version "1.8.0_221"
Java(TM) SE Runtime Environment (build 1.8.0_221-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.221-b11, mixed mode)可以选择rpm安装或者源码包安装：
我这里为了方便快捷直接使用rpm
# wget https://github.com/lmenezes/cerebro/releases/download/v0.8.5/cerebro-0.8.5-1.noarch.rpm安装：
# rpm -ivh cerebro-0.8.5-1.noarch.rpm
Preparing...                          ################################# [100%]
Creating system group: cerebro
Creating system user: cerebro in cerebro with cerebro user-daemon and shell /bin/false
Updating / installing...1:cerebro-0.8.5-1                  ################################# [100%]
Created symlink from /etc/systemd/system/multi-user.target.wants/cerebro.service to /usr/lib/systemd/system/cerebro.service.
--查询一些信息：
# rpm -ql cerebro-0.8.5-1
/etc/cerebro
/etc/default/cerebro
/usr/bin/cerebro
/usr/lib/systemd/system/cerebro.service
/usr/share/cerebro/README.md
/usr/share/cerebro/bin/cerebro
/usr/share/cerebro/conf/application.conf
/usr/share/cerebro/conf/evolutions
/usr/share/cerebro/conf/evolutions/default
/usr/share/cerebro/conf/evolutions/default/1.sql
/usr/share/cerebro/conf/logback.xml
/usr/share/cerebro/conf/reference.conf
/usr/share/cerebro/conf/routes
....
/usr/share/cerebro/logs
/var/lib/cerebro
/var/log/cerebro
/var/run/cerebro可以看到配置文件
/usr/share/cerebro/conf/application.conf
日志文件：
/var/log/cerebro
配置：
可以指定配置参数启动：
bin/cerebro -Dhttp.port=1234 -Dhttp.address=127.0.0.1
可以指定配置文件启动:启动：
bin/cerebro -Dconfig.file=/some/other/dir/alternate.conf配置：
# vim /usr/share/cerebro/conf/application.conf# A list of known hosts
hosts = [{host = "http://192.168.8.102:9200"name = "ES Cluster"#  headers-whitelist = [ "x-proxy-user", "x-proxy-roles", "X-Forwarded-For" ]#}# Example of host with authentication#{#  host = "http://some-authenticated-host:9200"#  name = "Secured Cluster"#  auth = {#    username = "username"#    password = "secret-password"#  }}
]cerebro的启动 状态查看和关闭：
# systemctl stop cerebro
# systemctl start cerebro
# systemctl status cerebro
● cerebro.service - Elasticsearch web admin toolLoaded: loaded (/usr/lib/systemd/system/cerebro.service; enabled; vendor preset: disabled)Active: active (running) since Thu 2019-12-12 14:36:39 CST; 6s agoProcess: 11484 ExecStartPre=/bin/chmod 755 /run/cerebro (code=exited, status=0/SUCCESS)为了便于问题排除可以直接使用命令启动cerebro：
# /usr/bin/cerebro
默认启动的：
[info] play.api.Play - Application started (Prod) (no global state)
[info] p.c.s.AkkaHttpServer - Listening for HTTP on /0:0:0:0:0:0:0:0:9000
允许网络范围内的任意主机登陆访问：登陆：
192.168.8.102:9000

若在配置文件中配置好了则可以直接可以查看到cluster的名称：点击cluster的名称直接登陆即可。

若没有配置则需要指定clusters的名称和node address

登陆进入则是默认的overview界面：

单机nodes可以看到节点的类型和监控信息：

mores标签可以看到集群的相关信息：

REST标签则提供了对Elasticsearch进行操作的基本命令：GET PUT POST DELETE

PUT操作：
# curl -X PUT "localhost:9200/customer/_doc/1?pretty" -H 'Content-Type: application/json' -d'
> {
>   "name": "John Doe"
> }
> '
{"_index" : "customer","_type" : "_doc","_id" : "1","_version" : 1,"result" : "created","_shards" : {"total" : 2,"successful" : 1,"failed" : 0},"_seq_no" : 0,"_primary_term" : 1
}GET操作：
# curl -X GET "localhost:9200/customer/_doc/1?pretty"
{"_index" : "customer","_type" : "_doc","_id" : "1","_version" : 1,"_seq_no" : 0,"_primary_term" : 1,"found" : true,"_source" : {"name" : "John Doe"}
}批量操作：
# curl "localhost:9200/_cat/indices?v"
health status index    uuid                   pri rep docs.count docs.deleted store.size pri.store.size
green  open   customer OBC93MybQeuiHtNm_m_9-g   5   1          1            0      8.5kb          4.2kb
green  open   bank     x8KA6MJRSYqPiNbeRfuCqA   5   1       1000            0    950.4kb        475.2kb--查询操作：
#curl -X GET "localhost:9200/bank/_search?pretty" -H 'Content-Type: application/json' -d'
{"query": { "match_all": {} },"sort": [{ "account_number": "asc" }]
}
'
--查询一条记录：
# curl -X GET "localhost:9200/bank/_search?pretty" -H 'Content-Type: application/json' -d'
> {
>   "query": { "match_all": {} },
>   "sort": [
>     { "account_number": "asc" }
>   ],
>   "from": 10,
>   "size": 1
> }
> '
{"took" : 3,"timed_out" : false,"_shards" : {"total" : 5,"successful" : 5,"skipped" : 0,"failed" : 0},"hits" : {"total" : 1000,"max_score" : null,"hits" : [{"_index" : "bank","_type" : "_doc","_id" : "10","_score" : null,"_source" : {"account_number" : 10,"balance" : 46170,"firstname" : "Dominique","lastname" : "Park","age" : 37,"gender" : "F","address" : "100 Gatling Place","employer" : "Conjurica","email" : "dominiquepark@conjurica.com","city" : "Omar","state" : "NJ"},"sort" : [10]}]}
}#curl -X GET "localhost:9200/bank/_search?pretty" -H 'Content-Type: application/json' -d'
{"query": { "match": { "address": "mill lane" } }
}
'#curl -X GET "localhost:9200/bank/_search?pretty" -H 'Content-Type: application/json' -d'
{"query": { "match_phrase": { "address": "mill lane" } }
}
'复杂查询：
curl -X GET "localhost:9200/bank/_search?pretty" -H 'Content-Type: application/json' -d'
{"query": {"bool": {"must": [{ "match": { "age": "40" } }],"must_not": [{ "match": { "state": "ID" } }]}}
}
'查询：balance在2000和3000之间的
curl -X GET "localhost:9200/bank/_search?pretty" -H 'Content-Type: application/json' -d'
{"query": {"bool": {"must": { "match_all": {} },"filter": {"range": {"balance": {"gte": 20000,"lte": 30000}}}}}
}
'--聚合操作：
curl -X GET "localhost:9200/bank/_search?pretty" -H 'Content-Type: application/json' -d'
{"size": 0,"aggs": {"group_by_state": {"terms": {"field": "state.keyword"}}}
}
'curl -X GET "localhost:9200/bank/_search?pretty" -H 'Content-Type: application/json' -d'
{"size": 0,"aggs": {"group_by_state": {"terms": {"field": "state.keyword"},"aggs": {"average_balance": {"avg": {"field": "balance"}}}}}
}
'

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