Centos7使用docker

主要记录docker的使用，安装mysql集群，redis集群，以及前后端项目部署。

Centos安装Docker

更新安装源，安装docker

 # yum update -y
 # yum install -y docker

使用aliyun进行镜像加速

1. 获取自己的专有的镜像加速地址：https://cr.console.aliyun.com/cn-hangzhou/instances/mirrors
2. 修改/etc/docker/daemon.json文件配置，没有则新建；

{
  "registry-mirrors": ["自己专有的镜像加速地址"]
}

Docker工作流程图

image.png

启动、关闭、重启

systemctl start docker
systemctl stop docker
systemctl restart docker

Docker 常用指令

1. 搜索镜像docker search xxx

 [root@localhost ~]# docker search java
INDEX       NAME                                               DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
docker.io   docker.io/node                                     Node.js is a JavaScript-based platform for...   7489      [OK]       
docker.io   docker.io/tomcat                                   Apache Tomcat is an open source implementa...   2415      [OK]       
docker.io   docker.io/java                                     Java is a concurrent, class-based, and obj...   1976      [OK]       
docker.io   docker.io/openjdk                                  OpenJDK is an open-source implementation o...   1702      [OK]       
docker.io   docker.io/ghost                                    Ghost is a free and open source blogging p...   985       [OK]       
docker.io   docker.io/jetty                                    Jetty provides a Web server and javax.serv...   305       [OK]       
docker.io   docker.io/groovy                                   Apache Groovy is a multi-faceted language ...   71        [OK]       

2. 下载镜像，复制镜像名称，使用docker pull 镜像名下载镜像。

[root@localhost ~]# docker pull docker.io/java
Using default tag: latest
Trying to pull repository docker.io/library/java ... 
latest: Pulling from docker.io/library/java
5040bd298390: Pull complete 

3. 查看docker已安装的镜像docker images

[root@localhost ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
docker.io/java      latest              d23bdf5b1b1b        2 years ago         643 MB

4. 导入导出镜像docker load/save

[root@localhost ~]# docker save java > /home/java.tar.gz
[root@localhost ~]# docker load </home/java.tar.gz

5. 移除docker镜像

[root@localhost ~]# docker rmi java

6. 创建并启动一个容器
   docker run -it --name 自定义容器名 容器名 启动的容器运行程序的类型
-it容器以交互界面的形式运行，--name xxx表示给容器其一个名字，可以不起
   -p 容器映射的端口 宿主机端口:容器端口
-v /宿主机目录:容器目录
-privileged 权限

[root@localhost home]# docker run -it -p 9000:8080 -p 9001:8085 -v /home/project:/soft --privileged --name myjava docker.io/java bash
root@92a08148d67c:/# javac
Usage: javac <options> <source files>
where possible options include:
  -g                         Generate all debugging info
  -g:none                    Generate no debugging info
  -g:{lines,vars,source}     Generate only some debugging info
  -nowarn                    Generate no warnings
  ...
root@92a08148d67c:/# java -version
openjdk version "1.8.0_111"
OpenJDK Runtime Environment (build 1.8.0_111-8u111-b14-2~bpo8+1-b14)
OpenJDK 64-Bit Server VM (build 25.111-b14, mixed mode)
root@92a08148d67c:/# cd soft
root@92a08148d67c:/soft# exit
exit

7. 暂停停止容器pause/unpause/stop/start

[root@localhost ~]# docker pause myjava
myjava
[root@localhost ~]# docker stop myjava
Error response from daemon: Cannot stop container myjava: Container 92a08148d67c1235e811557a0f6ff404ec729680ac7a65434e6d7fa2ce9e976c is paused. Unpause the container before stopping
[root@localhost ~]# docker unpause myjava
myjava
[root@localhost ~]# docker stop myjava
myjava
[root@localhost ~]# docker rm myjava
myjava
[root@localhost ~]# docker ps -a
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

更多docker指令请戳我