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#Elasticsearch
rest api documentation
examples
examples

installation

curl -fsSL https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add -
echo "deb https://artifacts.elastic.co/packages/7.x/apt stable main" | sudo tee -a /etc/apt/sources.list.d/elastic-7.x.list
sudo apt update && sudo apt install elasticsearch
sudo systemctl start elasticsearch
curl -X GET 'http://localhost:9200'

collaboration

# common part
ELASTIC_HOST=https://elasticsearch-label-search-prod.apps.vantage.org
INDEX_NAME=ubs-single-autolabel

check connection

# version info
curl -X GET $ELASTIC_HOST

# health check
curl -X GET $ELASTIC_HOST/_cluster/health?pretty=true
curl -X GET $ELASTIC_HOST/_cluster/health?pretty=true&level=shards
curl -X GET $ELASTIC_HOST/$INDEX_NAME

index

create index mapping

index info

# all indexes
curl -X GET $ELASTIC_HOST/_cat/indices | grep ubs | grep label
# count records by index
curl -X GET $ELASTIC_HOST/_cat/count/$INDEX_NAME

create index from file

curl -X POST $ELASTIC_HOST/$INDEX_NAME/_mapping \
-H 'Content-Type: application/json' \
-d @labels_mappings.json
```/

#### create index inline
```sh
# get index
curl -s --user "$SEARCH_USER:$SEARCH_PASSWORD" -X GET $ELASTIC_HOST/$ELASTIC_INDEX > file_with_index.json

# for using just have read index, pls remove next lines:
# {"index_name": {"aliases": {}, "mappings": {  # and last } 
# settings.index.provided_name
# settings.index.creation_date
# settings.index.uuid
# settings.index.version

# create index
json_mappings=`cat file_with_index.json`
curl -X PUT $ELASTIC_HOST/$INDEX_NAME -H 'Content-Type: application/json' \
-d @- << EOF
{
	"mappings": $json_mappings,
	"settings" : {
        "index" : {
            "number_of_shards" : 1,
            "number_of_replicas" : 0
        }
    }
}
EOF

# delete index
curl -s --user "$SEARCH_USER:$SEARCH_PASSWORD" -X GET $ELASTIC_HOST/$ELASTIC_INDEX > file_with_index.json

or it is better without types specification:

{
        "settings": {
            "index": {
                "number_of_shards": "5",
                "auto_expand_replicas": "false",
                "number_of_replicas": "2"
            }
        }
}

search request query request

curl -X GET "$ELASTIC_HOST/$INDEX_NAME/_search?q=front_vehicle.distance:>100&size=11&pretty=true"
curl -X GET "$ELASTIC_HOST/$INDEX_NAME/_search?q=road_type:highway"
echo '{"query": {"match" : {"sessionId" : "a8b8-0174df8a3b3d"}}}' > request.json
echo '{"query": { "range" : {"front_vehicle.distance": {"gte": 100}}}}' > request.json

curl -X POST -H "Content-Type: application/json" -u $LABEL_SEARCH_USERNAME:$LABEL_SEARCH_PASSWORD -d @request.json "$ELASTIC_HOST/$ELASTIC_INDEX/_search"

remove records delete records

curl -X PUT $ELASTIC_HOST/$INDEX_NAME/_delete_by_query' -H 'Content-Type: application/json' \
-d @- << EOF
{
    "query": {
        "term": {
            "sessionId.keyword": {
                "value": "8a140c23-420c-3bf0a285",
                "boost": 1.0
            }
        }
    }
}
EOF

all records from index

curl -X POST --insecure -s --user $USER:$PASSWORD $ELASTIC_HOST/$INDEX_NAME/_delete_by_query  -H 'Content-Type: application/json' -d '{
    "query": { "match_all": {} }
}'

curl -X POST --insecure -s --user $USER:$PASSWORD $ELASTIC_HOST/$INDEX_NAME/_delete_by_query -H 'Content-Type: application/json' -d @- << EOF
{
    "query": {
        "match": {
            "_id": "_all"
        }
    }
}
EOF

Exceptions

org.elasticsearch.hadoop.rest.EsHadoopRemoteException: illegal_argument_exception: Can't merge because of conflicts: [Cannot update excludes setting for [_source]]

check your index & type - something wrong with creation