Elasticsearch一些常用操作

Posted 2021-02-13 fenggeblog

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篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了Elasticsearch一些常用操作相关的知识，希望对你有一定的参考价值。

1、查看集群健康状态

[[email protected] ~]#curl -XGET http://172.16.0.51:9200/_cat/health?v
epoch      timestamp cluster      status node.total node.data shards pri relo init unassign pending_tasks max_task_wait_time active_shards_percent
1552784149 00:55:49  ELK-chaofeng green           3         3     44  22    0    0        0             0                  -                100.0%

2、查看集群节点

[[email protected] ~]#curl -XGET http://172.16.0.51:9200/_cat/nodes?v
ip          heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name
172.16.0.52           13          22   0    0.00    0.06     0.12 mdi       -      elk02
172.16.0.51           13          97   0    0.00    0.01     0.05 mdi       *      elk01
172.16.0.53           12          97   0    0.00    0.01     0.05 mdi       -      elk03

3、查看master节点状态

[[email protected] ~]#curl -XGET http://172.16.0.51:9200/_cat/master?v
id                     host        ip          node
8Z8Oi4ipRCmaAjKESa2-FA 172.16.0.51 172.16.0.51 elk01

4、查看ES集群安装了什么插件

[[email protected] ~]#curl -XGET http://172.16.0.51:9200/_cat/plugins?v
name component version

没有任何插件此时

5、查看集群索引

[[email protected] ~]#curl -XGET http://172.16.0.51:9200/_cat/indices?v
health status index                    uuid                   pri rep docs.count docs.deleted store.size pri.store.size
green  open   logstash-apacheerrorlogs kBCaAVGcQfahh730CXsFyw   5   1        111            0      264kb          132kb
green  open   .newkibana_1             aFFVpEqeTbSxQyJ48Djwyw   1   1          9            0    113.8kb         56.9kb
green  open   .kibana_1                nmZWm-d5TGy6ZqMgvslPEQ   1   1          3            0       24kb           12kb
green  open   logstash-apachelogs      VIzul30TTpWltpIrgrPwEA   5   1         77            0    765.9kb        382.9kb
green  open   sys                      58eN-9CRRqGt8i-B5Ar-qQ   5   1          0            0      2.5kb          1.2kb
green  open   logstash-apachehahalogs  uSmB7bPmR5WbqIscyduvIA   5   1       5767            0      9.2mb          4.6mb

6、自定义显示节点状态。

先获取帮助

[[email protected] ~]#curl -XGET http://172.16.0.51:9200/_cat/nodes?help
id                           | id,nodeId                      | unique node id                                                                                                   
pid                          | p                              | process id                                                                                                       
ip                           | i                              | ip address                                                                                                       
port                         | po                             | bound transport port                                                                                             
http_address                 | http                           | bound http address                                                                                               
version                      | v                              | es version

有非常多，想获取哪个就可以获取哪个。比如如下所示：

[[email protected] ~]#curl -XGET http://172.16.0.51:9200/_cat/nodes?h=name,ip,port,jdk
elk02 172.16.0.52 9300 1.8.0_201
elk01 172.16.0.51 9300 1.8.0_201
elk03 172.16.0.53 9300 1.8.0_201

7、显示当前节点的ES信息

[[email protected] ~]#curl http://172.16.0.51:9200
{
  "name" : "elk01",
  "cluster_name" : "ELK-chaofeng",
  "cluster_uuid" : "5VIF1_SdQdGbRekuR9q4-A",
  "version" : {
    "number" : "6.5.2",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "9434bed",
    "build_date" : "2018-11-29T23:58:20.891072Z",
    "build_snapshot" : false,
    "lucene_version" : "7.5.0",
    "minimum_wire_compatibility_version" : "5.6.0",
    "minimum_index_compatibility_version" : "5.0.0"
  },
  "tagline" : "You Know, for Search"
}

看到“you knoe , foe search ” 这表示当前ES安装成功。

8、安装插件，最著名的插件是HEAD插件。

查看我之前的博客，有讲如何安装HEAD插件的：https://www.cnblogs.com/FengGeBlog/p/10471710.html

9、添加索引和内容

技术图片

第一行的“-H Content-Type:application/json” 要带上去，这是6.x与5.x下的区别，否则不能创建索引成功。

10、查找我们刚刚创建的索引

[[email protected] ~]#curl -XGET ‘172.16.0.51:9200/student/_search?pretty‘
{
  "took" : 184,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : 1,
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "student",
        "_type" : "major",
        "_id" : "1",
        "_score" : 1.0,
        "_source" : {
          "name" : "Chao feng",
          "age" : 24,
          "course" : "English"
        }
      }
    ]
  }
}

在索引的后面添加“_search”来查看指定索引的内容，默认是列出当前所有下的所有内容

11、查找指定索引下的指定内容，比如搜索“English”

[[email protected] ~]#curl -XGET ‘172.16.0.51:9200/student/_search?q="English"&pretty‘
{
  "took" : 12,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : 1,
    "max_score" : 0.2876821,
    "hits" : [
      {
        "_index" : "student",
        "_type" : "major",
        "_id" : "1",
        "_score" : 0.2876821,
        "_source" : {
          "name" : "Chao feng",
          "age" : 24,
          "course" : "English"
        }
      }
    ]
  }
}

ES内部会自动进行大小写转换，默认是不区分大小写的。

11.1）HEAD插件上传

技术图片

12）对某个索引的某个类型做搜索

[[email protected] ~]#curl -XGET ‘172.16.0.51:9200/student/major/_search?q="English"&pretty‘
{
  "took" : 19,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : 1,
    "max_score" : 0.2876821,
    "hits" : [
      {
        "_index" : "student",
        "_type" : "major",
        "_id" : "1",
        "_score" : 0.2876821,
        "_source" : {
          "name" : "Chao feng",
          "age" : 24,
          "course" : "English"
        }
      }
    ]
  }
}