Installation de elasticsearch

Le 6 novembre 2024

En utilisant https://www.aukfood.fr/recherche-plein-texte-avec-nextcloud-et-elasticsearch/

mais en V8 au lie de V7

Installation d'Elasticsearch

J'ai remonté certains bugs (en v6) que je n'ai pas rencontrés en v7. C'est pourquoi je vous conseille d'utiliser la version 7.

Tout d'abord, installer Java :

apt-get update
apt-get install apt-transport-https default-jdk

Vérifier que Java est bien installé :

java -version

openjdk version "11.0.24" 2024-07-16

OpenJDK Runtime Environment (build 11.0.24+8-post-Ubuntu-1ubuntu322.04)

OpenJDK 64-Bit Server VM (build 11.0.24+8-post-Ubuntu-1ubuntu322.04, mixed mode, sharing)

On installe la clé GPG et la source APT :

wget -qO - 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 /etc/apt/sources.list.d/elastic-7.x.list
remplacé par 
echo "deb https://artifacts.elastic.co/packages/7.x/apt stable main" | sudo tee /etc/apt/sources.list.d/elastic-8.x.list

Puis on installe le paquet :

<apt-get update
apt-get install elasticsearch

Activer le service au démarrage :

systemctl enable elasticsearch

==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-unit-files ===

Authentification requise pour gérer les fichiers d'un service ou d'une unité système.

Multiple identities can be used for authentication:

1.  François Bernigaud,,, (francois)

2.  Côme Bernigaud,,, (come)

Choose identity to authenticate as (1-2): 1

Password:

==== AUTHENTICATION COMPLETE ===

Created symlink /etc/systemd/system/multi-user.target.wants/elasticsearch.service → /lib/systemd/system/elasticsearch.service.

==== AUTHENTICATING FOR org.freedesktop.systemd1.reload-daemon ===

Authentification requise pour recharger l’état de systemd.

Multiple identities can be used for authentication:

1.  François Bernigaud,,, (francois)

2.  Côme Bernigaud,,, (come)

Choose identity to authenticate as (1-2): 1

Password:

==== AUTHENTICATION COMPLETE ===

systemctl start elasticsearch

==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ===

Authentification requise pour démarrer « elasticsearch.service ».

Multiple identities can be used for authentication:

1.  François Bernigaud,,, (francois)

2.  Côme Bernigaud,,, (come)

Choose identity to authenticate as (1-2): 1

Password:

==== AUTHENTICATION COMPLETE ===

Job for elasticsearch.service failed because the control process exited with error code.

See "systemctl status elasticsearch.service" and "journalctl -xeu elasticsearch.service" for details.

sudo systemctl status elasticsearch.service

elasticsearch.service - Elasticsearch

    Loaded: loaded (/lib/systemd/system/elasticsearch.service; enabled; vendor preset: enabled)

    Active: failed (Result: exit-code) since Wed 2024-11-06 15:31:48 CET; 7s ago

      Docs: https://www.elastic.co

   Process: 8011 ExecStart=/usr/share/elasticsearch/bin/systemd-entrypoint -p ${PID_DIR}/elasticsearch.pid --quiet (code=exited, status=78)

  Main PID: 8011 (code=exited, status=78)

       CPU: 3.125s

nov. 06 15:31:46 E6320 systemd[1]: Starting Elasticsearch...

nov. 06 15:31:48 E6320 systemd-entrypoint[8011]: ERROR: Missing logging config file at /etc/elasticsearch/log4j2.properties, with exit code 78

nov. 06 15:31:48 E6320 systemd[1]: elasticsearch.service: Main process exited, code=exited, status=78/CONFIG

nov. 06 15:31:48 E6320 systemd[1]: elasticsearch.service: Failed with result 'exit-code'.

nov. 06 15:31:48 E6320 systemd[1]: Failed to start Elasticsearch.

nov. 06 15:31:48 E6320 systemd[1]: elasticsearch.service: Consumed 3.125s CPU time.

Une succession d'erreurs, en suivant chatGpt, je crée les fichiers avec le contenu suggéré :

/etc/elasticsearch/log4j2.properties

/etc/elasticsearch/jvm.options

/etc/elasticsearch/elasticsearch.yml

Pour consulter la version d'Elasticsearch :

curl -XGET 'http://localhost:9200'

curl -XGET 'http://localhost:9200'

{"error":{"root_cause":[{"type":"security_exception","reason":"missing authentication credentials for REST request [/]","header":{"WWW-Authenticate":["Basic realm=\"security\", charset=\"UTF-8\"","ApiKey"]}}],"type":"security_exception","reason":"missing authentication credentials for REST request [/]","header":{"WWW-Authenticate":["Basic realm=\"security\", charset=\"UTF-8\"","ApiKey"]}},"status":401}

Si vous souhaitez ajouter des fichiers PDF à votre index, vous devez installer un plugin :

sudo /usr/share/elasticsearch/bin/elasticsearch-plugin install ingest-attachment

Et redémarrer Elasticsearch :

systemctl restart elasticsearch

Par défaut, Elasticsearch écoute sur le port 9200.