docker pull elasticsearch:7.4.2
注意点：这里版本以7.4.2示例，步骤是一样的，具体版本可上docker hub查看：Docker Hub
2.启动及目录挂载
docker run --name my-elasticsearch -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" -v /opt/elasticsearch/config/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml -v /opt/elasticsearch/data:/usr/share/elasticsearch/data -v /opt/elasticsearch/plugins:/usr/share/elasticsearch/plugins -d elasticsearch:7.4.2
注意点：这里的"/op
