Elastic Stack 6 : Elasticsearch インストール2018/02/12 |
全文検索エンジン Elasticsearch をインストールします。
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[1] |
こちらを参考に Java をインストールしておきます。
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[2] | Elasticsearch をインストールして起動します。 |
[root@dlp ~]#
vi /etc/yum.repos.d/elasticsearch.repo # 新規作成 [elasticsearch-6.x] name=Elasticsearch repository for 6.x packages baseurl=https://artifacts.elastic.co/packages/6.x/yum gpgcheck=1 gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch enabled=1 autorefresh=1 type=rpm-md
[root@dlp ~]#
yum -y install elasticsearch # 動作確認 [root@dlp ~]# curl http://127.0.0.1:9200 { "name" : "bV0GuFK", "cluster_name" : "elasticsearch", "cluster_uuid" : "JprAV7AzTtSNL0De6BWwEQ", "version" : { "number" : "6.2.1", "build_hash" : "7299dc3", "build_date" : "2018-02-07T19:34:26.990113Z", "build_snapshot" : false, "lucene_version" : "7.2.1", "minimum_wire_compatibility_version" : "5.6.0", "minimum_index_compatibility_version" : "5.0.0" }, "tagline" : "You Know, for Search" } |
[3] | 日本語が扱えるようにプラグインをインストールします。 |
# analysis-kuromoji インストール [root@dlp ~]# /usr/share/elasticsearch/bin/elasticsearch-plugin install analysis-kuromoji -> Downloading analysis-kuromoji from elastic [=================================================] 100% -> Installed analysis-kuromoji # インストール済みプラグイン表示 [root@dlp ~]# /usr/share/elasticsearch/bin/elasticsearch-plugin list analysis-kuromoji |
[4] | 基本的な使い方です。 まず最初に Index を作成します。RDB のデータベースに相当する概念です。 |
# Index 一覧を表示 (pretty は JSON形式の表示を見易くするオプション) [root@dlp ~]# curl http://127.0.0.1:9200/_aliases?pretty { } # Index 作成 [root@dlp ~]# curl -X PUT "http://127.0.0.1:9200/test_index" {"acknowledged":true,"shards_acknowledged":true,"index":"test_index"} # 確認 [root@dlp ~]# curl http://127.0.0.1:9200/_aliases?pretty { "test_index" : { "aliases" : { } } }[root@dlp ~]# curl http://127.0.0.1:9200/test_index/_settings?pretty { "test_index" : { "settings" : { "index" : { "creation_date" : "1518494916064", "number_of_shards" : "5", "number_of_replicas" : "1", "uuid" : "f2UHmZ9US4q4Kw4AtfPEyw", "version" : { "created" : "6020199" }, "provided_name" : "test_index" } } } } |
[5] | Mapping とテストデータの投入を実行します。 Mapping は Index の構造を定義するものです。データを投入すると自動で Mapping 定義されますが、手動で定義することももちろん可能です。 |
# データ投入 [root@dlp ~]# curl -H "Content-Type: application/json" \
-X PUT "http://127.0.0.1:9200/test_index/doc01/1" -d '{ "subject" : "Test Post No.1", "description" : "This is the initial post", "content" : "This is the test message for using Elasticsearch." }' # Mapping 確認 [root@dlp ~]# curl "http://127.0.0.1:9200/test_index/_mapping/doc01?pretty" { "test_index" : { "mappings" : { "doc01" : { "properties" : { "content" : { "type" : "text", "fields" : { "keyword" : { "type" : "keyword", "ignore_above" : 256 } } }, "description" : { "type" : "text", "fields" : { "keyword" : { "type" : "keyword", "ignore_above" : 256 } } }, "subject" : { "type" : "text", "fields" : { "keyword" : { "type" : "keyword", "ignore_above" : 256 } } } } } } } } # データ確認 [root@dlp ~]# curl "http://127.0.0.1:9200/test_index/doc01/1?pretty" { "_index" : "test_index", "_type" : "doc01", "_id" : "1", "_version" : 1, "found" : true, "_source" : { "subject" : "Test Post No.1", "description" : "This is the initial post", "content" : "This is the test message for using Elasticsearch." } } # データ検索 # 例の検索条件は [description] に [initial] 含む [root@dlp ~]# curl "http://127.0.0.1:9200/test_index/doc01/_search?q=description:initial&pretty=true" { "took" : 7, "timed_out" : false, "_shards" : { "total" : 5, "successful" : 5, "skipped" : 0, "failed" : 0 }, "hits" : { "total" : 1, "max_score" : 0.2876821, "hits" : [ { "_index" : "test_index", "_type" : "doc01", "_id" : "1", "_score" : 0.2876821, "_source" : { "subject" : "Test Post No.1", "description" : "This is the initial post", "content" : "This is the test message for using Elasticsearch." } } ] } } |
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