1. docker pull elasticsearch:5.5.1
2. mkdir -p /data/elasticsearch/config
3. mkdir -p /data/elasticsearch/data
4. echo "http.host: 0.0.0.0" >> /data/elasticsearch/config/elasticsearch.yml
5. docker run -di --restart=always --name elasticsearch -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" -e ES_JAVA_OPTS="-Xms256m -Xmx512m" -v /data/elasticsearch/config/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml -v /data/elasticsearch/data:/usr/share/elasticsearch/data -v /data/elasticsearch/plugins:/usr/share/elasticsearch/plugins elasticsearch:5.5.1

-e "discovery.type=single-node" 设置为单节点 -e ES_JAVA_OPTS="-Xms256m -Xmx256m" 测试环境下，设置ES的初始内存和最大内存，否则导致过大启动不了ES

elasticsearch.yml http.host: 0.0.0.0 cluster.name: graylog