UI doesn't display registry container tag when using external registry


We recently configured gitlab container registry on our gitlab on premises server, using an external docker registry on the same private network.

Everything is working well expect the fact that the tags are not displayed on gitlab UI and API.

It is if we use the docker API.

docker images registry-gitlab.toto.titi/test/traefik
REPOSITORY                                      TAG       IMAGE ID       CREATED         SIZE
registry-gitlab.toto.titi/test/traefik   latest    ddb0268e5b5f   14 months ago   92.4MB

the ip address of the remote registry is

Here is our configuration in /etc/gitlab/gitlab.rb :

registry_external_url 'https://registry-gitlab.toto.titi'
registry_nginx['ssl_certificate'] = <PATH TO SSL CERT>
registry_nginx['ssl_certificate_key'] = <PATH TO SSL KEY>
gitlab_rails['registry_enabled'] = true
gitlab_rails['registry_api_url'] = ""
gitlab_rails['registry_issuer'] = "gitlab-issuer"
gitlab_rails['registry_host'] = "registry-gitlab.toto.titi"

Here is the external registry configuration :

version: 0.1
    rootdirectory: /var/lib/registry
    enabled: true
    realm: https://gitlab.titi.toto/jwt/auth
    service: container_registry
    issuer: gitlab-issuer
    rootcertbundle: <PATH TO SSL CERT>

We found some clues here : Container Registry - Images tags doesn't appears gitlab Ui and gitlab API (#277472) · Issues · GitLab.org / GitLab · GitLab

But we are unable to apply the requested configuration (replacing ‘’ by ‘localhost’), as the registry is not on the same server as our gitlab instance.

We have been unable to find any similar case in gitlab bug/issues.

Does anyone have any idea of what can be the problem ?

Thank you very much.

Solved, this line was missing in /etc/gitlab/gitlab.rb :

registry['registry_http_addr'] = ""