在centos7的基础镜像上构建elasticsearch镜像

1. 创建工作目录并进入

mkdir ~/elasticsearch
cd ~/elasticsearch

2. 创建Dockerfile文件

vi Dockerfile

3. 编辑Dockerfile文件

FROM centos:7

# 安装JDK
RUN yum -y install java-1.8.0-openjdk

# 下载elasticsearch
RUN curl -L -O https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.9.3-linux-x86_64.tar.gz

# 解压elasticsearch
RUN tar -xvf elasticsearch-7.9.3-linux-x86_64.tar.gz

# 删除压缩包
RUN rm elasticsearch-7.9.3-linux-x86_64.tar.gz

# 设置环境变量
ENV PATH /elasticsearch-7.9.3/bin:$PATH

# 暴露端口
EXPOSE 9200 9300

# 启动elasticsearch
CMD ["elasticsearch"]

4. 构建镜像

docker build -t elasticsearch:7.9.3 .

5. 运行容器

docker run -p 9200:9200 -p 9300:9300 -d elasticsearch:7.9.3

6. 访问elasticsearch

在浏览器中访问 `http://localhost:9200`，如果看到类似下面的输出，则elasticsearch已经成功运行。

{
  "name" : "my-node",
  "cluster_name" : "my-cluster",
  "cluster_uuid" : "oW8a9h9MRQ2V7gB6YYyUxw",
  "version" : {
    "number" : "7.9.3",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "c4138e51121ef06a6404866cddc601906fe5c868",
    "build_date" : "2020-10-16T10:36:16.141335Z",
    "build_snapshot" : false,
    "lucene_version" : "8.6.2",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}