Elastic Search
Introduction
Elasticsearch est un système de base de données non relationnel
Database => index Table => Type Row => Document
Installation
apt update && apt upgrade && apt install gnupg wget iputils-ping apt-transport-https default-jdk curl
wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | apt-key add -
echo "deb https://artifacts.elastic.co/packages/7.x/apt stable main" | tee -a /etc/apt/sources.list.d/elastic-7.x.list
apt update
export ES_SKIP_SET_KERNEL_PARAMETERS=true && apt install elasticsearch
systemctl start elasticsearch
systemtl status elasticsearch
systemctl enable elasticsearch
Workaround erreur
- Erreur 1 :
To bypass this problem by running Elasticsearch without machine learning functionality set [xpack.ml.enabled: false]
xpack.security.enabled: false
xpack.watcher.enabled: false
xpack.ml.enabled: false
xpack.graph.enabled: false
- Erreur 2 :
Pour bug de spawn permission denied :
sed -i 's/PrivateTmp=true/PrivateTmp=false' /usr/lib/systemd/system/elasticsearch.service
Relancer elasticsearch
systemctl daemon-reload
systemctl restart elasticsearch
Test
Elasticsearch fonctionne comme une API, pour tester faites un GET sur localhost :
curl -G http://localhost:9200
Configuration
Log : /var/log/elasticsearch/elasticsearch.log
Config : /etc/elasticsearch/elasticsearch.yml
Le bind ip est une option dans le fichier yml :
http.hosts: 0.0.0.0
J’ai mis 0.0.0.0 ça donne l’accès à tout le monde mais toi met ce que tu veux.
Attention cette option n’est pas indiqué de base, il faut la rajouter en plus
Utilisation
Exemple création d’un utilisateur
curl -X POST "localhost:9200/user/omer?pretty" -H 'Content-Type: application/json' -d'
{
"password" : "mdp",
"roles" : [ "admin", "dev" ],
"full_name" : "Omer Lakraa"
}
'
- Réponse :
{
"_index" : "user",
"_type" : "omer",
"_id" : "dEyiu3EB_2SbHoVuCayr",
"_version" : 1,
"result" : "created",
"_shards" : {
"total" : 2,
"successful" : 1,
"failed" : 0
},
"_seq_no" : 0,
"_primary_term" : 1
}
- Tester la connexion
curl -u omer:mdp http://elastic.private:9200/_cluster/health
{"cluster_name":"elasticsearch","status":"yellow","timed_out":false,"number_of_nodes":1,"number_of_data_nodes":1,"active_primary_shards":1,"active_shards":1,"relocating_shards":0,"initializing_shards":0,"unassigned_shards":1,"delayed_unassigned_shards":0,"number_of_pending_tasks":0,"number_of_in_flight_fetch":0,"task_max_waiting_in_queue_millis":0,"active_shards_percent_as_number":50.0}