Fedora 34
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Podman : Use Registry
2021/05/14
 
Install Registry to build Private Registry for Container images.
[1] Install Registry.
[root@dlp ~]#
dnf -y install docker-distribution
[2] If Firewalld is running, allow registry port.
[root@dlp ~]#
firewall-cmd --add-port=5000/tcp --permanent

success
[root@dlp ~]#
firewall-cmd --reload

success
[3] Configure Registry.
This is the settings to use HTTP connection and no-authentication.
[root@dlp ~]#
vi /etc/docker-distribution/registry/config.yml
# this is the default

# no need to change on HTTP and no authentication

version: 0.1
log:
  fields:
    service: registry
storage:
    cache:
        layerinfo: inmemory
    filesystem:
        rootdirectory: /var/lib/registry
http:
    addr: :5000

[root@dlp ~]#
systemctl enable --now docker-distribution
[root@dlp ~]#
podman images

REPOSITORY                         TAG     IMAGE ID      CREATED            SIZE
srv.world/fedora-nginx             latest  c2f266c51e58  56 minutes ago     425 MB
srv.world/fedora-httpd             latest  810bed9d1157  About an hour ago  529 MB
registry.fedoraproject.org/fedora  latest  5f05951e2065  2 weeks ago        187 MB

# [push] from localhost

[root@dlp ~]#
podman tag fedora dlp.srv.world:5000/fedora:my-registry

[root@dlp ~]#
podman push dlp.srv.world:5000/fedora:my-registry --tls-verify=false

[root@dlp ~]#
podman images

REPOSITORY                         TAG          IMAGE ID      CREATED            SIZE
srv.world/fedora-nginx             latest       c2f266c51e58  57 minutes ago     425 MB
srv.world/fedora-httpd             latest       810bed9d1157  About an hour ago  529 MB
registry.fedoraproject.org/fedora  latest       5f05951e2065  2 weeks ago        187 MB
dlp.srv.world:5000/fedora          my-registry  5f05951e2065  2 weeks ago        187 MB

# [pull] from another node

[root@node01 ~]#
podman pull dlp.srv.world:5000/fedora:my-registry --tls-verify=false

[root@node01 ~]#
podman images

REPOSITORY                 TAG          IMAGE ID      CREATED      SIZE
dlp.srv.world:5000/fedora  my-registry  5f05951e2065  2 weeks ago  187 MB
[4] To enable Basic authentication, Configure like follows.
[root@dlp ~]#
dnf -y install httpd-tools
[root@dlp ~]#
vi /etc/docker-distribution/registry/config.yml
# add to the end

auth:
  htpasswd:
    realm: basic-realm
    path: /etc/containers/registries.d/.htpasswd

[root@dlp ~]#
systemctl restart docker-distribution
# add users

# dd [-c] at initial file creation

[root@dlp ~]#
htpasswd -Bc /etc/containers/registries.d/.htpasswd fedora

New password:
Re-type new password:
Adding password for user fedora

# verify possible to access

# an error is shown if access with no-authentication

[root@node01 ~]#
podman pull dlp.srv.world:5000/fedora:my-registry --tls-verify=false

Trying to pull dlp.srv.world:5000/fedora:my-registry...
Error: Error initializing source docker://dlp.srv.world:5000/fedora:my-registry: Error reading manifest my-registry in dlp.srv.world:5000/fedora: unauthorized: authentication required

# authenticate by a user added with [htpasswd]

[root@node01 ~]#
podman login dlp.srv.world:5000 --tls-verify=false

Username: fedora
Password:
Login Succeeded!
[root@node01 ~]#
podman pull dlp.srv.world:5000/fedora:my-registry --tls-verify=false

[root@node01 ~]#
podman images

REPOSITORY                 TAG          IMAGE ID      CREATED      SIZE
dlp.srv.world:5000/fedora  my-registry  5f05951e2065  2 weeks ago  187 MB
[5] To access via HTTPS and use valid certificates like from Let's Encrypt and so on, Configure like follows.
This example is based on the environment that certificates have been gotten under the [/etc/letsencrypt/live/dlp.srv.world].
[root@dlp ~]#
cp -p /etc/letsencrypt/live/dlp.srv.world/{fullchain,privkey}.pem /etc/containers/certs.d/

[root@dlp ~]#
vi /etc/docker-distribution/registry/config.yml
# add [tls] section under the [http] section like follows

.....
.....
http:
    addr: :5000
    tls:
      certificate: /etc/containers/certs.d/fullchain.pem
      key: /etc/containers/certs.d/privkey.pem
.....
.....

[root@dlp ~]#
systemctl restart docker-distribution
# verify possible to access

[root@node01 ~]#
podman pull dlp.srv.world:5000/fedora:my-registry

[root@node01 ~]#
podman images

REPOSITORY                 TAG          IMAGE ID      CREATED      SIZE
dlp.srv.world:5000/fedora  my-registry  5f05951e2065  2 weeks ago  187 MB
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