[Elasticsearch] CentOS elasticsearch 설치 및 실행하기

prerequisite

- Java 8 이상 권장

RPM 으로 설치하기

1. Download

(*현 시점에서는 elasticsearch version이 7.0.0입니다. 이는 추후에 변경될 수 있습니다.)

$ wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-oss-7.0.0-x86_64.rpm

직접 받아도됨 : https://www.elastic.co/kr/downloads/elasticsearch

2. 설치

$ rpm -ivh elasticsearch-oss-7.0.0-x86_64.rpm

 

* 꼭 알아두기!

Install path : /usr/share/elasticsearch

config file path : /etc/elasticsearch

Init script path : /etc/init.d/elasticsearch

 

3. Elasticsearch service 시작&중지

$ sudo systemctl enable elasticsearch.service

$ sudo service elasticsearch start

$ sudo service elasticsearch stop

 

4. Elasticsearch service 확인

: Elasticsearch가 localhost에서 제대로 run 했는지 확인한다.

$ curl -XGET 'localhost:9200' 

[sy.yoon@rusdev ~]$ curl -XGET localhost:9200
{
  "name" : "rusdev",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "eAhWxkPYTeG5aHxF9RksqA",
  "version" : {
    "number" : "7.0.0",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "b7e28a7",
    "build_date" : "2019-04-05T22:55:32.697037Z",
    "build_snapshot" : false,
    "lucene_version" : "8.0.0",
    "minimum_wire_compatibility_version" : "6.7.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

 

Linux 로 설치하기

 

1. Download

https://www.elastic.co/kr/downloads/elasticsearch 에서 elasticsearch-7.0.0-linux-x86_64.tar.gz를 다운로드 한다.

2. 압축을 푼다.

$ tar -xvf elasticsearch-7.0.0-linux-x86_64.tar.gz

 

3. 실행

$ cd elasticsearch-7.0.0

$ bin/elasticsearch

 

4. Elasticsearch service 확인

: Elasticsearch가 localhost에서 제대로 run 했는지 확인한다.

$ curl -XGET 'localhost:9200' 

[sy.yoon@rusdev ~]$ curl -XGET localhost:9200
{
  "name" : "rusdev",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "eAhWxkPYTeG5aHxF9RksqA",
  "version" : {
    "number" : "7.0.0",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "b7e28a7",
    "build_date" : "2019-04-05T22:55:32.697037Z",
    "build_snapshot" : false,
    "lucene_version" : "8.0.0",
    "minimum_wire_compatibility_version" : "6.7.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

 

 

 

 

 

여기까지가 설치 과정임

---

RPM으로 설치한 후 elasticsearch를 실행하니 아래와 같은 error가 발생함. 

결국 해결은 못해서 재설치함 ..

 

 

만약 'curl: (7) : Failed connect to localhost:9200; 연결이 거부됨' 과 같은 Error가 발생할 경우, 다음과 같은 명령어로 원인을 확인한다.

$ systemctl status elasticsearch

Case 1

[root@rusdev ~]# systemctl status elasticsearch
● elasticsearch.service - Elasticsearch
   Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since 금 2019-04-26 14:21:50 KST; 7s ago
     Docs: http://www.elastic.co
  Process: 170391 ExecStart=/usr/share/elasticsearch/bin/elasticsearch -p ${PID_DIR}/elasticsearch.pid --quiet (code=exited, status=1/FAILURE)
 Main PID: 170391 (code=exited, status=1/FAILURE)

 4월 26 14:21:47 rusdev elasticsearch[170391]: 2019-04-26 14:21:47,738 main ERROR Null object return...rs.
 4월 26 14:21:47 rusdev elasticsearch[170391]: 2019-04-26 14:21:47,739 main ERROR Null object return...rs.
 4월 26 14:21:47 rusdev elasticsearch[170391]: 2019-04-26 14:21:47,739 main ERROR Null object return...rs.
 4월 26 14:21:47 rusdev elasticsearch[170391]: 2019-04-26 14:21:47,739 main ERROR Unable to locate a...ot"
 4월 26 14:21:47 rusdev elasticsearch[170391]: 2019-04-26 14:21:47,739 main ERROR Unable to locate a...ex"
 4월 26 14:21:47 rusdev elasticsearch[170391]: 2019-04-26 14:21:47,740 main ERROR Unable to locate a...og"
 4월 26 14:21:47 rusdev elasticsearch[170391]: 2019-04-26 14:21:47,740 main ERROR Unable to locate a...on"
 4월 26 14:21:50 rusdev systemd[1]: elasticsearch.service: main process exited, code=exited, status...LURE
 4월 26 14:21:50 rusdev systemd[1]: Unit elasticsearch.service entered failed state.
 4월 26 14:21:50 rusdev systemd[1]: elasticsearch.service failed.
Hint: Some lines were ellipsized, use -l to show in full.

Case 2

systemctl status elasticsearch
● elasticsearch.service - Elasticsearch
   Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since 금 2019-04-26 16:07:28 KST; 28s ago
     Docs: http://www.elastic.co
  Process: 189956 ExecStart=/usr/share/elasticsearch/bin/elasticsearch -p ${PID_DIR}/elasticsearch.pid --quiet (code=exited, status=1/FAILURE)
 Main PID: 189956 (code=exited, status=1/FAILURE)

 4월 26 16:07:28 rusdev systemd[1]: Started Elasticsearch.
 4월 26 16:07:28 rusdev elasticsearch[189956]: 오류: 기본 클래스 org.elasticsearch.tools.java_version_checker.Ja…습니다.
 4월 26 16:07:28 rusdev systemd[1]: elasticsearch.service: main process exited, code=exited, status=1/FAILURE
 4월 26 16:07:28 rusdev systemd[1]: Unit elasticsearch.service entered failed state.
 4월 26 16:07:28 rusdev systemd[1]: elasticsearch.service failed.
Hint: Some lines were ellipsized, use -l to show in full.
[root@rusdev elasticsearch-head]# systemctl status elasticsearch
● elasticsearch.service - Elasticsearch
   Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since 금 2019-04-26 16:07:28 KST; 25min ago
     Docs: http://www.elastic.co
  Process: 189956 ExecStart=/usr/share/elasticsearch/bin/elasticsearch -p ${PID_DIR}/elasticsearch.pid --quiet (code=exited, status=1/FAILURE)
 Main PID: 189956 (code=exited, status=1/FAILURE)

 4월 26 16:07:28 rusdev systemd[1]: Started Elasticsearch.
 4월 26 16:07:28 rusdev elasticsearch[189956]: 오류: 기본 클래스 org.elasticsearch.tools.java_version_checker.JavaVersionChecker을(를) 찾거나 로드할 수 없습니다.
 4월 26 16:07:28 rusdev systemd[1]: elasticsearch.service: main process exited, code=exited, status=1/FAILURE
 4월 26 16:07:28 rusdev systemd[1]: Unit elasticsearch.service entered failed state.
 4월 26 16:07:28 rusdev systemd[1]: elasticsearch.service failed.
[root@rusdev elasticsearch-head]#

Case 3

● elasticsearch.service - Elasticsearch
   Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since 목 2019-05-02 16:29:04 KST; 1h 26min ago
     Docs: http://www.elastic.co
  Process: 40233 ExecStart=/usr/share/elasticsearch/bin/elasticsearch -p ${PID_DIR}/elasticsearch.pid --quiet -Edefault.path.logs=${LOG_DIR} -Edefault.path.data=${DATA_DIR} -Edefault.path.conf=${CONF_DIR} (code=exited, status=1/FAILURE)
  Process: 40231 ExecStartPre=/usr/share/elasticsearch/bin/elasticsearch-systemd-pre-exec (code=exited, status=0/SUCCESS)
 Main PID: 40233 (code=exited, status=1/FAILURE)

 5월 02 16:29:00 rusdev systemd[1]: Starting Elasticsearch...
 5월 02 16:29:00 rusdev systemd[1]: Started Elasticsearch.
 5월 02 16:29:04 rusdev systemd[1]: elasticsearch.service: main process exited, code=exited, status=1/FAILURE
 5월 02 16:29:04 rusdev systemd[1]: Unit elasticsearch.service entered failed state.
 5월 02 16:29:04 rusdev systemd[1]: elasticsearch.service failed.

bash -x elasticsearch 

[root@rusdev bin]# bash -x elasticsearch
++ dirname elasticsearch
+ source ./elasticsearch-env
++ set -e -o pipefail
++ CDPATH=
++ SCRIPT=elasticsearch
++ '[' -h elasticsearch ']'
+++ dirname elasticsearch
++ ES_HOME=.
+++ cd .
+++ pwd
++ ES_HOME=/usr/share/elasticsearch/bin
+++ basename /usr/share/elasticsearch/bin
++ '[' bin '!=' bin ']'
+++ dirname /usr/share/elasticsearch/bin
++ ES_HOME=/usr/share/elasticsearch
++ ES_CLASSPATH='/usr/share/elasticsearch/lib/*'
++ '[' '!' -z /usr/lib/jvm/jdk1.8.0_191 ']'
++ JAVA=/usr/lib/jvm/jdk1.8.0_191/bin/java
++ '[' '!' -x /usr/lib/jvm/jdk1.8.0_191/bin/java ']'
++ '[' '!' -z '' ']'
++ '[' '!' -z '' ']'
++ /usr/lib/jvm/jdk1.8.0_191/bin/java -cp '/usr/share/elasticsearch/lib/*' org.elasticsearch.tools.java_version_checker.JavaVersionChecker
오류: 기본 클래스 org.elasticsearch.tools.java_version_checker.JavaVersionChecker을(를) 찾거나 로드할 수 없습니다.