docker
镜像的迁移：导出和导入镜像
查看镜像：
root@docker \~\]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos latest 5d0da3dc9764 2 years ago 231MB ###### 打包 将镜像打包，找到save,可以将镜像保存为一个tar包，可以将tar发送给其他用户，也可以作为备份 \[root@docker \~\]# docker save -o centos.tar centos:latest \[root@docker \~\]# ls anaconda-ks.cfg centos.tar RHEL7-extras.iso RHEL7OSP-10.iso \[root@docker \~\]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES \[root@docker \~\]# docker ps -all CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES b9d46da21fe3 centos:latest "/bin/bash" 20 hours ago Exited (0) 10 minutes ago c0 删除镜像： 删除镜像时，如果有这个镜像生成的容器正在使用（exited时也不能删除），那么就无法使用rmi移除镜像 \[root@docker \~\]# docker rmi centos:latest Error response from daemon: conflict: unable to remove repository reference "centos:latest" (must force) - container b9d46da21fe3 is using its referenced image 5d0da3dc9764 删除容器，退出容器up状态 docker stop c0 \[root@docker \~\]# docker rm c0 c0 使用docker ps -all 确定没有镜像 \[root@docker \~\]# docker ps -all CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES \[root@docker \~\]# docker rmi centos:latest Untagged: centos:latest Untagged: centos@sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177 Deleted: sha256:5d0da3dc976460b72c77d94c8a1ad043720b0416bfc16c52c45d4847e53fadb6 Deleted: sha256:74ddd0ec08fa43d09f32636ba91a0a3053b02cb4627c35051aff89f853606b59 \[root@docker \~\]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE ###### 加载 从tar中引入镜像：将tar文件加载到镜像中 docker --help docker load --help \[root@docker \~\]# ls anaconda-ks.cfg centos.tar RHEL7-extras.iso RHEL7OSP-10.iso \[root@docker \~\]# docker load -i centos.tar 74ddd0ec08fa: Loading layer 238.6MB/238.6MB Loaded image: centos:latest \[root@docker \~\]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos latest 5d0da3dc9764 2 years ago 231MB #### 创建镜像 1.从容器导出tar包 查看帮助文档 docker --help docker export --help 使用指令 docker export -o centos_yum.tar c0 查看新生成的tar包 2.从tar包导入镜像 查看帮助文档 docker --help docker import --help 使用导入 Usage: docker import \[OPTIONS\] file\|URL\|- \[REPOSITORY\[:TAG\]
docker import -m 说明内容 centos_yum.tar centos:yum
查看镜像，这个镜像不需要我们配置yum
创建容器c0,在c0容器中配置了阿里云镜像和epel-release，ctrl+p+q在后台运行容器
容器打包：
root@docker \~\]# docker export -o centos_yum.tar c0 \[root@docker \~\]# ls anaconda-ks.cfg centos_yum.tar RHEL7OSP-10.iso centos.tar RHEL7-extras.iso 引入镜像： \[root@docker \~\]# docker import -m yum centos_yum.tar centos:yum sha256:c03efa37a8dc3ab41a31a56f9a12c80374c8ccb321d57a617bd2b53a07d4f71e \[root@docker \~\]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos yum c03efa37a8dc 22 seconds ago 260MB centos latest 5d0da3dc9764 2 years ago 231MB 验证： \[root@docker \~\]# docker stop c0 c0 \[root@docker \~\]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 882870618b17 centos:latest "/bin/bash" 15 minutes ago Exited (0) 6 seconds ago c0 \[root@docker \~\]# docker rm c0 c0 \[root@docker \~\]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES \[root@docker \~\]# docker run -it --name c0 centos:yum /bin/bash \[root@860c52d03ab9 /\]# ls /etc/yum.repos.d CentOS-Base.repo epel-playground.repo epel-testing.repo epel-modular.repo epel-testing-modular.repo epel.repo #### ip网络：查看ip 1.交互式：进入到容器，使用指令 docker start c0 docker attach c0 yum -y install net-tools或者iproute ifconfig或ip a s 来查看地址 2.使用docker指令inspect \[root@docker \~\]# docker inspect c100 3.在外部调用指令:exec 前提是在容器上下载相关的工具或者 docker exec c100 yum -y install net-tools \[root@docker \~\]# docker exec c100 ip a s \[root@docker \~\]# docker exec c100 ifconfig 使用exec指令touch一个文件 \[root@docker \~\]# docker exec c100 touch /opt/test.txt \[root@docker \~\]# docker exec c100 ls /opt test.txt #### 启动容器并端口映射 不做端口映射的话，在物理机上无法查看docker容器发布的服务 1.指定端口映射 将容器中的80端口映射到宿主机（docker主机）80端口 docker run -it --name c0 -p80(宿主机):80(容器） centos:httpd /bin/bash 2.随机端口映射 随机的为容器指定映射端口，映射端口\>=32768 docker run -it --name c1 -p80（容器） centos:httpd /bin/bash crtl+p+q docker ps 3.指定其他ip的端口映射 通过其他的ip地址的端口映射容器的端口 通过ifconfig添加一个ip docker run -it --name c0 -pIP地址::80 centos:httpd /bin/bash \[root@docker \~\]# ifconfig ens33:0 192.168.118.56 broadcast 192.168.118.56 netmask 255.255.255.255 up \[root@docker \~\]# docker run -it --name c0 -p192.168.118.56::80 centos:httpd /bin/bash \[root@91b858d59851 /\]# httpd -k start \[root@91b858d59851 /\]# curl localhost i am httpd \[root@91b858d59851 /\]# \[root@docker \~\]# \[root@docker \~\]# docker ps --all CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 91b858d59851 centos:httpd "/bin/bash" 50 seconds ago Up 50 seconds 192.168.118.56:32768-\>80/tcp c0 \[root@docker \~\]# curl 192.168.118.56:32768 i am httpd  #### 持久化：共享卷，挂载 将宿主机上的source目录与容器中的data目录共享： \[root@docker \~\]# ls / bin dev home lib64 mnt proc run source sys usr boot etc lib media opt root sbin srv tmp var \[root@docker \~\]# docker run -it --name c0 -v /source:/data centos:httpd /bin/bash \[root@805a80743684 /\]# ls bin dev home lib64 media opt root sbin sys usr data etc lib lost+found mnt proc run srv tmp var \[root@805a80743684 /\]# \[root@docker \~\]# \[root@docker \~\]# touch /source/abc.txt \[root@docker \~\]# ls /source abc.txt \[root@docker \~\]# docker exec c0 ls /data abc.txt \[root@docker \~\]# docker exec c0 touch /data/def.txt \[root@docker \~\]# ls /source abc.txt def.txt