====== elasticsearch_installatie======
[[elk_stack:elk_stack|{{ :elk_stack:icon.jpg?120|}}]]

===== context=====
dit document beschrijft de installatie van Elasticsearch

===== installatie=====
  - voeg [[elk_stack:repository|ELK stack repository]] toe
  - installeer elasticsearch 
    - YUM:<code>sudo yum install elasticsearch</code>
    - APT:<code>sudo apt-get install elasticsearch</code>
  - activeer de service @boot: 
    - YUM:<code>sudo systemctl daemon-reload
sudo systemctl enable elasticsearch.service</code>
    - APT:<code>systemctl daemon-reload 
systemctl enable elasticsearch.service</code>
  - indien /tmp directory mount optie ''noexec'' heeft, voer onderstaande stappen uit: 
    - open ''/etc/sysconfig/elasticsearch''
    - voeg toe: <code># Added since /tmp has noexec permission set and JNA needs exec permissions
ES_TMPDIR=/var/lib/elasticsearch/tmp </code>
    - maak de vermelde directory aan en stel toegangsrechten in: <code>
mkdir /var/lib/elasticsearch/tmp && chown elasticsearch /var/lib/elasticsearch/tmp </code>
  - start de services: <code>sudo systemctl start elasticsearch.service</code>
===== testen =====
  * stuur een HTTP-request naar de service: <code> curl -X GET "localhost:9200/?pretty" </code>
  * output: <code> {
  "name" : "kv-tb01",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "FkLzX9hMQyGq5WKjkoSkMw",
  "version" : {
    "number" : "7.5.2",
    "build_flavor" : "default",
    "build_type" : "rpm",
    "build_hash" : "8bec50e1e0ad29dad5653712cf3bb580cd1afcdf",
    "build_date" : "2020-01-15T12:11:52.313576Z",
    "build_snapshot" : false,
    "lucene_version" : "8.3.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}</code>
===== configuratie=====
Ga nu verder met de [[elk_stack:elasticsearch_configuratie|elasticsearch_configuratie]]

===== problemen, problemen =====
==== logboeken ====
  * open /var/log/elasticsearch/elasticsearch.log
==== bij opstarten service: ====
__fout:__ ''[2020-02-07T14:29:35,151][ERROR][o.e.b.ElasticsearchUncaughtExceptionHandler] [kv-tb01] fatal error in thread [main], exiting
java.lang.NoClassDefFoundError: Could not initialize class com.sun.jna.Native''\\ 
__oorzaak:__ /tmp heeft ''noexec'' mount optie. 
===== meer info =====
voeg hier linken toe naar verdere uitleg
{{tag>elk_stack}}