[Docker] 用 Docker Registry API v2 快速查遠端 repo 裡，某個映像檔的所有標籤
最近在用公司提供的 Harbor 時，
要查某個映像檔 (image) 有哪些標籤 (tag) 時，總覺得有點麻煩，
需要先登入 Harbor UI > 2FA > 點進 Project > 搜尋映像檔 > 列出標籤，
而且不知為何，列出標籤這個步驟在 UI 上一直都很慢…
查了一下，決定寫一個 Shell script 加上 Docker Registry API v2，
來查遠端 repo 裡，某個映像檔的所有標籤：
#!/bin/bash
HOST_IMAGE="$1"
if [ -z "${HOST_IMAGE}" ]; then
echo "Usage: $0 <repo> <image>"
echo "Ex: $0 test.registry.com/myrepo/test-job"
exit
fi
set -euxo pipefail
HOST="${HOST_IMAGE%%/*}"
IMAGE="${HOST_IMAGE#*/}"
CMD_ARRS=()
if [[ "${HOST_IMAGE}" == *"test.registry.com/myrepo"* ]]; then
CMD_ARRS+=("-u" 'myrepoadmin:12345')
elif [[ "${HOST_IMAGE}" == *"test.registry.com/repo2"* ]]; then
CMD_ARRS+=("-u" 'repo2admin:45678')
fi
curl -s "${CMD_ARRS[@]}" "https://${HOST}/v2/${IMAGE}/tags/list" | jq -r '.tags[]' | sort -V
#!/bin/bash
HOST_IMAGE="$1"
if [ -z "${HOST_IMAGE}" ]; then
echo "Usage: $0 <repo> <image>"
echo "Ex: $0 test.registry.com/myrepo/test-job"
exit
fi
set -euxo pipefail
HOST="${HOST_IMAGE%%/*}"
IMAGE="${HOST_IMAGE#*/}"
CMD_ARRS=()
if [[ "${HOST_IMAGE}" == *"test.registry.com/myrepo"* ]]; then
CMD_ARRS+=("-u" 'myrepoadmin:12345')
elif [[ "${HOST_IMAGE}" == *"test.registry.com/repo2"* ]]; then
CMD_ARRS+=("-u" 'repo2admin:45678')
fi
curl -s "${CMD_ARRS[@]}" "https://${HOST}/v2/${IMAGE}/tags/list" | jq -r '.tags[]' | sort -V
#!/bin/bash
HOST_IMAGE="$1"
if [ -z "${HOST_IMAGE}" ]; then
echo "Usage: $0 <repo> <image>"
echo "Ex: $0 test.registry.com/myrepo/test-job"
exit
fi
set -euxo pipefail
HOST="${HOST_IMAGE%%/*}"
IMAGE="${HOST_IMAGE#*/}"
CMD_ARRS=()
if [[ "${HOST_IMAGE}" == *"test.registry.com/myrepo"* ]]; then
CMD_ARRS+=("-u" 'myrepoadmin:12345')
elif [[ "${HOST_IMAGE}" == *"test.registry.com/repo2"* ]]; then
CMD_ARRS+=("-u" 'repo2admin:45678')
fi
curl -s "${CMD_ARRS[@]}" "https://${HOST}/v2/${IMAGE}/tags/list" | jq -r '.tags[]' | sort -V
這個 script 裡面還會看目前要連的 repo，
如果有符合的，就自動加上帳號密碼，省得要一直輸入 (雖然是比較不安全啦…)
另外，用到了
sort -V
sort -V 這個參數，
讓標籤可以用版本的方式排序，這樣像 1.19 才會排在 1.2 的後面～
來看看執行的樣子吧～
$ docker_tags.sh test.registry.com/myrepo/test-job
v1.106.8
v1.106.9
v1.106.16
v1.107.1
v1.107.2
v1.110.17
v1.110.18
$ docker_tags.sh test.registry.com/myrepo/test-job
v1.106.8
v1.106.9
v1.106.16
v1.107.1
v1.107.2
v1.110.17
v1.110.18
$ docker_tags.sh test.registry.com/myrepo/test-job v1.106.8 v1.106.9 v1.106.16 v1.107.1 v1.107.2 v1.110.17 v1.110.18
這個程式跑起來很快，不知為何沒有 Harbor UI 版到處卡卡的問題…
之後想確認特定映像檔的標籤，就可以用這個小 shell script 來解決囉～
參考資料：Docker Registry API – Listing Images and Tags
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