Exercise2 Elasticsearch

1. REST API

1.1) show elasticsearch information

curl -XGET 127.0.0.1:9200/

2. CAT API

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2.1) show cat API function list

curl -XGET 127.0.0.1:9200/_cat

2.2) show cluster health

curl 127.0.0.1:9200/_cat/health?v

2.3) show node list in cluster

curl 127.0.0.1:9200/_cat/nodes?v

2.4) show indices list

curl 127.0.0.1:9200/_cat/indices?v

2.5) show shades list

curl 127.0.0.1:9200/_cat/shards?v

2.6) show template

curl 127.0.0.1:9200/_cat/templates?v

2.6-1) show logstash template

curl 127.0.0.1:9200/_template/logstash?pretty=true

3. Search API

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search command pattern

curl 127.0.0.1:9200/[index_pattern]/[type_name]/_search

3.1) search for all type

curl 127.0.0.1:9200/logstash*/_search?pretty=true

3.2) search specific type

curl 127.0.0.1:9200/logstash*/doc,user/_search?pretty=true

3.3) URI search

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curl 127.0.0.1:9200/logstash*/doc,user/_search?q=status:200

3.4) Request Body Search

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curl 127.0.0.1:9200/logstash*/_search?pretty=true --header "Content-Type: application/json" \
-d '{
    "query" : {
        "term" : { "status" : "200" }
    }
}'

4. Aggregation Framework

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4.1 Metric aggregation

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This example show metric aggregation with cadinality. (Uniq Count)

curl 127.0.0.1:9200/logstash*/_search?pretty=true --header "Content-Type: application/json" \
-d '{
    "aggs" : {
	"type_count" : {
        	"cardinality" : { 
			"field" : "status.keyword"
		}
	}
    }
}'

4.2) Bucket aggregation

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This example show bucket aggregation using term.

curl 127.0.0.1:9200/logstash*/_search?pretty=true --header "Content-Type: application/json" \
-d '{
    "aggs" : {
	"logstash*" : {
        	"terms" : { 
			"field" : "status.keyword",
			"size" : 10
		}
	}
    }
}'

4.3) Pipeline aggregation

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4.4) Matrix aggregation

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