docker安装elasticsearch

启动elasticsearch

• 下载Elasticsearch7.17.5的docker镜像：

docker pull elasticsearch:7.17.5

• 修改虚拟内存区域大小，否则会因为过小而无法启动:

sysctl -w vm.max_map_count=262144

• 使用如下命令启动Elasticsearch服务，内存小的服务器可以通过ES_JAVA_OPTS来设置占用内存大小：

docker run -p 9200:9200 -p 9300:9300 --name elasticsearch \
-e "discovery.type=single-node" \
-e "cluster.name=elasticsearch" \
-e "ES_JAVA_OPTS=-Xms512m -Xmx1024m" \
-v /mydata/elasticsearch/plugins:/usr/share/elasticsearch/plugins \
-v /mydata/elasticsearch/data:/usr/share/elasticsearch/data \
-d elasticsearch:7.17.5

docker run -p 9200:9200 -p 9300:9300 --name es \
-e "discovery.type=single-node" \
-e "cluster.name=elasticsearch" \
-e "ES_JAVA_OPTS=-Xms512m -Xmx1024m" \
-e "ingest.geoip.downloader.enabled=false" \
-v /Users/eternity/tool/elastic/plugins:/usr/share/elasticsearch/plugins \
-v /Users/eternity/tool/elastic/data:/usr/share/elasticsearch/data \
-d elasticsearch:7.17.5

• 启动报错，"stacktrace": ["org.elasticsearch.ElasticsearchException: not all primary shards of [.geoip_databases] index are active"，是因为启动时会去更新地图的一些数据库，这里直接禁掉即可，ingest.geoip.downloader.enabled=false``
• 启动时会发现/usr/share/elasticsearch/data目录没有访问权限，只需要修改/mydata/elasticsearch/data目录的权限，再重新启动即可；

chmod 777 /mydata/elasticsearch/data/

• 安装中文分词器IKAnalyzer，注意下载与Elasticsearch对应的版本，下载地址：https://github.com/medcl/elasticsearch-analysis-ik/releases

• 下载完成后解压到Elasticsearch的/mydata/elasticsearch/plugins目录下；

• 重新启动服务：

docker restart elasticsearch

• 开启防火墙：

firewall-cmd --zone=public --add-port=9200/tcp --permanent
firewall-cmd --reload

• 访问会返回版本信息：http://127.0.0.1:9200

{
    "name": "4739231e3c6a",
    "cluster_name": "elasticsearch",
    "cluster_uuid": "NybOghB6RkW0etsn7WFvRA",
    "version": {
        "number": "7.17.5",
        "build_flavor": "default",
        "build_type": "docker",
        "build_hash": "8d61b4f7ddf931f219e3745f295ed2bbc50c8e84",
        "build_date": "2022-06-23T21:57:28.736740635Z",
        "build_snapshot": false,
        "lucene_version": "8.11.1",
        "minimum_wire_compatibility_version": "6.8.0",
        "minimum_index_compatibility_version": "6.0.0-beta1"
    },
    "tagline": "You Know, for Search"
}