在使用功能docker過程中，我們不希望建構的鏡像存儲于網上，想寄存在本地内網的某個 docker daemon上，但是基礎鏡仍然需要從網絡下載下傳到本地，那麼如何将下載下傳的基礎鏡像，例如centos7 、mysql等，整體打包到檔案，然後通過拷貝或者内網傳輸（ftp， scp ,sftp samba服務等）到另一台docker daemon 下，然後再導入到docker 檔案系統中。
一、下載下傳鏡像
首先，在聯網的一台電腦上，使用docker pull 下載下傳具體的基礎鏡像
[[email protected] /]# docker pull registry.cn-hangzhou.aliyuncs.com/taozhenting/centos7-mysql5.6.39
latest: Pulling from registry.cn-hangzhou.aliyuncs.com/taozhenting/centos7-mysql5.6.39
72a57cd6f59e: Downloading [=====> ] 7.367 MB/73.17 MB
437b26967a35: Download complete
404643e1b09d: Download complete
8c1df8e84e1e: Download complete
ed011b4cefad: Download complete
a29a91270ab9: Download complete
cc7e0c733682: Download complete
44f06e627506: Download complete
c765eb323142: Downloading [========> ] 8.971 MB/56 MB
6c947b94fe88: Download complete
bb247c4659f5: Download complete
651e62357935: Download complete
f79735d0a128: Download complete
49a860dfa73f: Download complete
e1f145d014a1: Download complete
ea7ef0491107: Downloading [=> ] 7.39 MB/192.6 MB
c0c38974ac7d: Download complete
2c1cd91dcafd: Download complete
22a5a8f2f2ab: Download complete
下載下傳完成後，
latest: Pulling from registry.cn-hangzhou.aliyuncs.com/taozhenting/centos7-mysql5.6.39
72a57cd6f59e: Pull complete
437b26967a35: Pull complete
404643e1b09d: Pull complete
8c1df8e84e1e: Pull complete
ed011b4cefad: Pull complete
a29a91270ab9: Pull complete
cc7e0c733682: Pull complete
44f06e627506: Pull complete
c765eb323142: Pull complete
6c947b94fe88: Pull complete
bb247c4659f5: Pull complete
651e62357935: Pull complete
f79735d0a128: Pull complete
49a860dfa73f: Pull complete
e1f145d014a1: Pull complete
ea7ef0491107: Pull complete
c0c38974ac7d: Pull complete
2c1cd91dcafd: Pull complete
22a5a8f2f2ab: Pull complete
Digest: sha256:1d907d061ee7b1a41c0f42966b9625e6f6da4cc9da0017602c6cef39eb696312
Status: Downloaded newer image for registry.cn-hangzhou.aliyuncs.com/taozhenting/centos7-mysql5.6.39:latest
[[email protected] /]#
檢視目前鏡像
[[email protected] /]# docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
registry.cn-hangzhou.aliyuncs.com/taozhenting/centos7-mysql5.6.39 latest 22a5a8f2f2ab 7 months ago 933.5 MB
registry.cn-hangzhou.aliyuncs.com/marmot/mysql-5.6 latest 06cf43840fdb 11 months ago 299 MB
[[email protected] /]#
二、導出鏡像
導出鏡像，使用 docker save // Save an image to a tar archive
[[email protected] /]# docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
registry.cn-hangzhou.aliyuncs.com/taozhenting/centos7-mysql5.6.39 latest 22a5a8f2f2ab 7 months ago 933.5 MB
registry.cn-hangzhou.aliyuncs.com/marmot/mysql-5.6 latest 06cf43840fdb 11 months ago 299 MB
[[email protected] /]# docker save registry.cn-hangzhou.aliyuncs.com/taozhenting/centos7-mysql5.6.39:latest > /具體目錄/centos7-mysql.tar
[[email protected] /]# cd /具體目錄 && ls -a
. .. centos7-mysql.tar envi rpmPackages
然後将 tar包，通過拷貝，或者網絡 複制到另一台裝置上
三、鏡像導入
在另一台docker 裝置上操作，
[[email protected] hadoop]# docker load --input=/存儲目錄/centos7-mysql.tar
[[email protected] hadoop]# docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
registry.cn-hangzhou.aliyuncs.com/taozhenting/centos7-mysql5.6.39 latest 22a5a8f2f2ab 7 months ago 815.5 MB
或者
[[email protected] hadoop]# docker load < /home/hadoop/wubaolin/registry.tar
[[email protected] hadoop]# docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
daocloud.io/registry latest 642c5398c648 12 weeks ago 33.29 MB
registry.cn-hangzhou.aliyuncs.com/taozhenting/centos7-mysql5.6.39 latest 22a5a8f2f2ab 7 months ago 815.5 MB
[[email protected] hadoop]#
轉移成功， 接下來，可使用Dockerfile 基于基礎鏡像建構新鏡像
或者 啟動容器添加内容，然後送出容器 建立新的鏡像
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