[Elasticsearch] 8.0 살펴 봤던 거

시간이 없어서 전체적으로 다 살펴 보지는 못했네요.

우선 확인 한것만 그냥 올려 놓습니다.

 

Elasticsearch 8.0 

- path.data 다중 설정이 deprecated.
7.13.0 부터 deprecated 되었으나 아직까지는 기능을 제공 하고 있음.
디스크를 추가 하기 보다 data node 를 늘리는 것을 추천함.
단일 경로 설정 사용을 권장함.

- system index 에 접근 제어.
allow_restricted_indices: true 로 하면 접근 가능함.

- 8.0 실행 시 jdk 17 을 요구함.
warning: ignoring JAVA_HOME=/Users/henry/.jenv/versions/11.0; using ES_JAVA_HOME
The minimum required Java version is 17; your Java version from [/Library/Java/JavaVirtualMachines/adoptopenjdk-11.jdk/Contents/Home] does not meet this requirement

https://adoptium.net/ 에서 다운로드 받아 설치 합니다. (pkg)

/Library/Java/JavaVirtualMachines/temurin-17.jdk
$ jenv add /Library/Java/JavaVirtualMachines/temurin-17.jdk/Contents/Home
$ ES_JAVA_HOME='/Library/Java/JavaVirtualMachines/temurin-17.jdk/Contents/Home' bin/elasticsearch

- 8.0 부터는 보안이 기본 적용 됩니다.
관련 security 기능을 사용하고 싶지 않을 경우 xpack.security.enable: false 로 설정 하면 됩니다.


✅ Elasticsearch security features have been automatically configured!
✅ Authentication is enabled and cluster connections are encrypted.

ℹ️  Password for the elastic user (reset with `bin/elasticsearch-reset-password -u elastic`):
  5mZOrRjTURT=V90LqU5N

ℹ️  HTTP CA certificate SHA-256 fingerprint:
  24d263ef19a4e66de19ab35dbd8a0cbf4ca303598123d3ee6acbb96852e25421

ℹ️  Configure Kibana to use this cluster:
• Run Kibana and click the configuration link in the terminal when Kibana starts.
• Copy the following enrollment token and paste it into Kibana in your browser (valid for the next 30 minutes):
  eyJ2ZXIiOiI4LjAuMCIsImFkciI6WyIxOTIuMTY4LjAuMTA0OjkyMDAiXSwiZmdyIjoiMjRkMjYzZWYxOWE0ZTY2ZGUxOWFiMzVkYmQ4YTBjYmY0Y2EzMDM1OTgxMjNkM2VlNmFjYmI5Njg1MmUyNTQyMSIsImtleSI6Imd0R2g1bjRCc3hnWEYtbV92bU43OnlwVDhOaXNaU2ZXejRhdEhTaExfS0EifQ==

ℹ️  Configure other nodes to join this cluster:
• On this node:
  ⁃ Create an enrollment token with `bin/elasticsearch-create-enrollment-token -s node`.
  ⁃ Uncomment the transport.host setting at the end of config/elasticsearch.yml.
  ⁃ Restart Elasticsearch.
• On other nodes:
  ⁃ Start Elasticsearch with `bin/elasticsearch --enrollment-token <token>`, using the enrollment token that you generated.


- elasticsearch.yml 내부에 환경 변수 설정이 가능 합니다.
node.name:    ${HOSTNAME}
network.host: ${ES_NETWORK_HOST}

export HOSTNAME="host1,host2"

- transient 설정을 더 이상 추천 하지 않습니다.
영구 설정을 사용 하세요.

- data directory 에 대한 어떠한 조작, 수정도 하지 마십시오.


- lucene-analyzers-common 이 lucene 9.0.0 으로 넘어 가면서 lucene-analysis-common 으로 변경 되었습니다.
import org.apache.lucene.analysis.util.TokenizerFactory;
to
import org.apache.lucene.analysis.TokenizerFactory;
로 변경 되었습니다.

import org.apache.lucene.analysis.standard.ClassicFilter;
to
import org.apache.lucene.analysis.classic.ClassicFilter;
로 변경 되었습니다.

- node 단독 실행 시 아래 설정이 꼭 되어야 합니다.
discovery.type: single-node
or
cluster.initial_master_nodes, discovery.seed_hosts, discovery.seed_providers 중 하나는 꼭 설정 되어야 합니다.

- mapping 파라미터 중 boost 파라미터가 삭제 되었습니다.
.The `boost` parameter on field mappings has been deprecated
.The `boost` parameter on field mappings has been removed

- jdk 변경 된 점
Remove support for JAVA_HOME
Require Java 17 for running Elasticsearch

- exist action some removed.
Remove aliases exist action
Remove indices exists action
Remove types exists action

- Enable LZ4 transport compression by default