Docker安装ElasticSearch/ES

```
shell> docker search elasticsearch
NAME                                     DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
elasticsearch                            Elasticsearch is a powerful open source sear…   6115      [OK]       
kibana                                   Kibana gives shape to any kind of data — str…   2622      [OK]       
     
```

shell> docker pull elasticsearch:7.4.0

shell> docker images
REPOSITORY                                      TAG       IMAGE ID       CREATED         SIZE

elasticsearch                                   7.4.0     dd156dd42341   3 years ago     859MB
mobz/elasticsearch-head                         5         b19a5c98e43b   6 years ago     824MB

shell> docker create -e "discovery.type=single-node" -p 9200:9200  -p 9300:9300 \
-e ES_JAVA_OPTS="-Xms1g -Xmx1g" \
--name elasticsearch1 elasticsearch:7.4.0

shell> docker start elasticsearch1

"WorkingDir": "/usr/share/elasticsearch" 

shell> docker exec -it elasticsearch1 /bin/bash
shell> vi /usr/share/elasticsearch/config/elasticsearch.yml

http.cors:
  enabled: true
  allow-origin: "*"

shell> docker exec -it elasticsearch1 /bin/bash
shell> vi /usr/share/elasticsearch/config/jvm.options

################################################################
## IMPORTANT: JVM heap size
################################################################
##
## The heap size is automatically configured by Elasticsearch
## based on the available memory in your system and the roles
## each node is configured to fulfill. If specifying heap is
## required, it should be done through a file in jvm.options.d,
## which should be named with .options suffix, and the min and
## max should be set to the same value. For example, to set the
## heap to 4 GB, create a new file in the jvm.options.d
## directory containing these lines:
##
## -Xms4g
## -Xmx4g
##
## See https://www.elastic.co/guide/en/elasticsearch/reference/8.9/heap-size.html
## for more information
##
################################################################
-Xms1g
-Xmx1g

shell> docker update --restart=always elasticsearch1

shell> docker network connect --ip 172.19.0.2  mynetwork elasticsearch1