How to get a list of images on docker registry v2

Question

I\'m using docker registry v1 and I\'m interested in migrating to the newer version, v2. But I need some way to get a list of images present on registry; for example with re

Answer 1

Get catalogs

Default, registry api return 100 entries of catalog, there is the code:

When you curl the registry api:

curl --cacert domain.crt https://your.registry:5000/v2/_catalog

it equivalents with：

curl --cacert domain.crt https://your.registry:5000/v2/_catalog?n=100

This is a pagination methond.

When the sum of entries beyond 100, you can do in two ways:

First: give a bigger number

curl --cacert domain.crt https://your.registry:5000/v2/_catalog?n=2000

Sencond: parse the next linker url

curl --cacert domain.crt https://your.registry:5000/v2/_catalog

A link element contained in response header:

curl --cacert domain.crt https://your.registry:5000/v2/_catalog

response header:

Link: ; rel="next"

The link element have the last entry of this request, then you can request the next 'page':

curl --cacert domain.crt https://your.registry:5000/v2/_catalog?last=pro-octopus-ws

If the response header contains link element, you can do it in a loop.

Get Images

When you get the result of catalog, it like follows:

{ "repositories": [ "busybox", "ceph/mds" ] }

you can get the images in every catalog:

curl --cacert domain.crt https://your.registry:5000/v2/busybox/tags/list

returns:

{"name":"busybox","tags":["latest"]}