之前已配置好基礎鏡像，其他地方也需要用到這些鏡像時怎么辦呢？

答案：鏡像的導入和導出功能。

[root@wxtest1607 ~]# docker imagesREPOSITORYTAG IMAGE ID CREATED SIZEtomcat8 3.0 90457edaf6ff 6 hours ago 1.036 GB[root@wxtest1607 lixr]# docker save 9045 > tomcat8-apr.tar[root@wxtest1607 lixr]# ls -lh總用量 1.2G-rw-r--r-- 1 root root 1005M 8月 24 17:42 tomcat8-apr.tar2、鏡像的導入

當前缺一臺CentOS7服務器，實踐方式變成，先刪除image，然后再導入，折騰呀！

[root@wxtest1607 lixr]# docker imagesREPOSITORYTAG IMAGE ID CREATED SIZEtomcat8 3.0 90457edaf6ff 7 hours ago 1.036 GB[root@wxtest1607 lixr]# docker rmi 9045Untagged: tomcat8:3.0Deleted: sha256:90457edaf6ff4ce328dd8a3131789c66e6bd89e1ce40096b89dd49d6e9d62bc8Deleted: sha256:00df1d61992f2d87e7149dffa7afa5907df3296f5775c53e3ee731972e253600[root@wxtest1607 lixr]# docker imagesREPOSITORYTAG IMAGE ID CREATED SIZE[root@wxtest1607 lixr]# docker load < tomcat8-apr.tar60685807648a: Loading layer [==================================================>] 442.7 MB/442.7 MB[root@wxtest1607 lixr]# yer [> ] 527.7 kB/442.7 MB[root@wxtest1607 lixr]# docker imagesREPOSITORYTAG IMAGE ID CREATED SIZE<none> <none> 90457edaf6ff 7 hours ago 1.036 GB[root@wxtest1607 lixr]# docker tag 9045 tomcat8-apr:3.0[root@wxtest1607 lixr]# [root@wxtest1607 lixr]# docker imagesREPOSITORYTAG IMAGE ID CREATED SIZEtomcat8-apr3.0 90457edaf6ff 7 hours ago 1.036 GB3、容器的導出

[root@wxtest1607 lixr]# docker ps CONTAINER ID IMAGECOMMAND CREATED STATUS PORTSNAMESb91d9ad83efa 9045'/bin/bash' 18 seconds ago Up 15 seconds trusting_coldenf680b58163ab aa79'/bin/bash' 8 hours ago Up 8 hours stupefied_mayer4db6aa9b8278 4052'mysqld_safe' 21 hours ago Up 21 hours 8080/tcp, 0.0.0.0:53307->3306/tcp nostalgic_leavitt7bcfe52af7a0 599d'mysqld_safe' 21 hours ago Up 21 hours 8080/tcp, 0.0.0.0:53306->3306/tcp sleepy_hodgkin[root@wxtest1607 lixr]# [root@wxtest1607 lixr]# [root@wxtest1607 lixr]# docker export b91d9ad83efa > tomcat80824.tar[root@wxtest1607 lixr]# ls -lh總用量 2.1G-rw-r--r-- 1 root root 943M 8月 24 18:37 tomcat80824.tar-rw-r--r-- 1 root root 1005M 8月 24 17:42 tomcat8-apr.tar

b91d9ad83efa 是 鏡像90457edaf6ff 啟動后的容器。

鏡像導出的文件比容器導出文件大哦。

[root@wxtest1607 lixr]# docker import tomcat80824.tarsha256:880fc96a6bb6abdfa949a56d40ef76f32f086fa11024ddcfb4e4e8b22041d5f2[root@wxtest1607 lixr]# docker imagesREPOSITORYTAG IMAGE ID CREATED SIZE<none> <none> 880fc96a6bb6 6 seconds ago 971.9 MB[root@wxtest1607 lixr]# docker tag 880f tomcat80824:1.0[root@wxtest1607 lixr]# docker imagesREPOSITORYTAG IMAGE ID CREATED SIZEtomcat808241.0 880fc96a6bb6 About a minute ago 971.9 MBtomcat8-apr3.0 90457edaf6ff 8 hours ago 1.036 GB5、鏡像和容器 導出和導入的區別

鏡像導入和容器導入的區別：

1）容器導入 是將當前容器 變成一個新的鏡像

2）鏡像導入 是復制的過程

save 和 export區別：

1）save 保存鏡像所有的信息-包含歷史

2）export 只導出當前的信息

[root@wxtest1607 lixr]# docker history 880fc96a6bb6IMAGECREATED CREATED BY SIZECOMMENT880fc96a6bb6 12 minutes ago 971.9 MB Imported from -[root@wxtest1607 lixr]# docker history 90457edaf6ffIMAGECREATED CREATED BY SIZECOMMENT90457edaf6ff 8 hours ago /bin/bash 434.4 MB <missing> 23 hours ago /bin/bash 406.5 MB <missing> 7 weeks ago /bin/sh -c #(nop) CMD ['/bin/bash'] 0 B <missing> 7 weeks ago /bin/sh -c #(nop) LABEL license=GPLv2 0 B <missing> 7 weeks ago /bin/sh -c #(nop) LABEL vendor=CentOS 0 B <missing> 7 weeks ago /bin/sh -c #(nop) LABEL name=CentOS Base Imag 0 B <missing> 7 weeks ago /bin/sh -c #(nop) ADD file:b3bdbca0669a03490e 194.6 MB <missing> 7 weeks ago /bin/sh -c #(nop) MAINTAINER The CentOS Proje 0 B

補充：docker images 詳解

docker images 用于查看本地已下載的鏡像

[root@localhost ~]$ docker imagesREPOSITORY TAG IMAGE ID CREATED SIZEcentos latest 1e1148e4cc2c 2 weeks ago 202MBubuntu latest 93fd78260bd1 5 weeks ago 86.2MBREPOSITORY # 鏡像倉庫TAG # 鏡像標簽IMAGE ID # 鏡像IDCREATED # 鏡像創建時間SIZE # 鏡像大小

以上為個人經驗，希望能給大家一個參考，也希望大家多多支持好吧啦網。如有錯誤或未考慮完全的地方，望不吝賜教。