Ubuntu 21.10 に Elasticsearch をインストール

Ubuntu のカーネル

$ uname -a
Linux iwata 5.13.0-27-generic #29-Ubuntu SMP Wed Jan 12 17:36:47 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

Java のインストール

sudo apt install openjdk-11-jdk

Java のバージョン

$ java --version
openjdk 11.0.14 2022-01-18
OpenJDK Runtime Environment (build 11.0.14+9-Ubuntu-0ubuntu2.22.10)
OpenJDK 64-Bit Server VM (build 11.0.14+9-Ubuntu-0ubuntu2.22.10, mixed mode, sharing)

Elasticsearch のインストール

wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo gpg --dearmor -o /usr/share/keyrings/elasticsearch-keyring.gpg
echo "deb [signed-by=/usr/share/keyrings/elasticsearch-keyring.gpg] https://artifacts.elastic.co/packages/8.x/apt stable main" | sudo tee /etc/apt/sources.list.d/elastic-8.x.list
sudo apt update
sudo apt install elasticsearch

サーバーの状態の確認

sudo systemctl status elasticsearch

サーバーの起動

sudo systemctl start elasticsearch

クライアントから、サーバーの確認

$ http http://localhost:9200
HTTP/1.1 200 OK
X-elastic-product: Elasticsearch
content-encoding: gzip
content-length: 319
content-type: application/json

{
    "cluster_name": "elasticsearch",
    "cluster_uuid": "R92Wu-uxTl2gad2cs6OkIg",
    "name": "iwata",
    "tagline": "You Know, for Search",
    "version": {
        "build_date": "2022-03-17T22:01:32.658689558Z",
        "build_flavor": "default",
        "build_hash": "d0925dd6f22e07b935750420a3155db6e5c58381",
        "build_snapshot": false,
        "build_type": "deb",
        "lucene_version": "9.0.0",
        "minimum_index_compatibility_version": "7.0.0",
        "minimum_wire_compatibility_version": "7.17.0",
        "number": "8.1.1"
    }
}

クライアントからの確認は、こちら
Elasticsearch の使い方

立ち上がらない時の対策

/etc/elasticsearch/elasticsearch.yml

(省略）
xpack.security.enabled: false