docker鏡像id是唯一的，可以物理性的標(biāo)明一個(gè)鏡像，repository：tag可以有多個(gè)，但是也不會(huì)重復(fù)，也是唯一的。
要重新打tag的話，語(yǔ)法是：
docker tag imageId repository:newTag
比如將這個(gè)centos：7重新打tag為centos7：base
此時(shí)倉(cāng)庫(kù)中有兩個(gè)鏡像，鏡像id相同，只是多了一個(gè)tag標(biāo)簽，也就是多了一個(gè)引用。刪除不需要的引用即可，刪除時(shí)必須用tag刪除，用鏡像id刪除會(huì)物理性的刪除鏡像，這兩個(gè)引用會(huì)同時(shí)被刪除掉。
當(dāng)然，打tag的時(shí)候也可以使用這樣的語(yǔ)法：
docker tag repository:tag repository:newTag
補(bǔ)充知識(shí)：docker遇到問(wèn)題一：同一鏡像有多個(gè)Tag情況下，執(zhí)行 docker rmi 鏡像ID 指令無(wú)法刪除
鏡像列表
Cappuccinooos-MacBook-Pro:.docker Cappuccinooo$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
runoob/centos 6.7 4994f1f799c7 2 days ago 191MB
runoob/centos dev 4994f1f799c7 2 days ago 191MB
tomcat latest da0729cd9201 2 days ago 463MB
刪除鏡像
Cappuccinooos-MacBook-Pro:.docker Cappuccinooo$ docker rmi 4994f1f799c7
Error response from daemon: conflict: unable to delete 4994f1f799c7 (must be forced) - image is referenced in multiple repositories
刪除方法一
docker rmi -f 鏡像ID
如下所示：
Cappuccinooos-MacBook-Pro:.docker Cappuccinooo$ docker rmi -f 4994f1f799c7
Untagged: runoob/centos:6.7
Deleted: sha256:4994f1f799c7c9241c23055ecc7335c074caaa96243dcc665d1c1836216c34f2
Deleted: sha256:6829bdaf30b11efab68c0ae473690ae1637830a560487ce07ad08988484c0987
Deleted: sha256:fd54ea270ce8e890023eaba2a72eff187d27f71f3ffea9e11e9684de8ac9606a
Deleted: sha256:ece17abd46a222b2fa35f1e18a981092605453c258dceca6919e3572ab4f1fbf
Deleted: sha256:b59b8f6f9d682eeb94a3628fded0325e9d43664fdd26651971a6fc4bd34bc3ca
Deleted: sha256:71c39bd52e1858772c19aac2b18203dca9a02f6a07a4cef54099ecd14734da83
Deleted: sha256:6ff1dc40fd96eebca0785a047794a83f3c954e4949c350fbd0661ed0f7ed8c96
Deleted: sha256:19efa1023a08e6d4014cea1821fe9f3b169eed3c11397460fb19db1d22b69fb2
Cappuccinooos-MacBook-Pro:.docker Cappuccinooo$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
tomcat latest da0729cd9201 2 days ago 463MB
docker rmi : 刪除本地一個(gè)或多少鏡像。
語(yǔ)法
docker rmi [OPTIONS] IMAGE [IMAGE…]
OPTIONS說(shuō)明：
-f : 強(qiáng)制刪除；
–no-prune : 不移除該鏡像的過(guò)程鏡像，默認(rèn)移除；
刪除方法二
docker rmi repository:tag
如下所示：
Cappuccinooos-MacBook-Pro:.docker Cappuccinooo$ docker rmi runoob/centos:dev
Untagged: runoob/centos:dev
Cappuccinooos-MacBook-Pro:.docker Cappuccinooo$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
runoob/centos 6.7 4994f1f799c7 2 days ago 191MB
tomcat latest da0729cd9201 2 days ago 463MB
Cappuccinooos-MacBook-Pro:.docker Cappuccinooo$ docker rmi runoob/centos:6.7
Untagged: runoob/centos:6.7
Cappuccinooos-MacBook-Pro:.docker Cappuccinooo$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
tomcat latest da0729cd9201 2 days ago 463MB
以上這篇docker實(shí)現(xiàn)重新打tag并刪除原tag的鏡像就是小編分享給大家的全部?jī)?nèi)容了，希望能給大家一個(gè)參考，也希望大家多多支持腳本之家。
