Podman : Use Registry2020/11/06

	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
registry.fedoraproject.org/fedora  latest  79fd58dc7611  9 days ago  181 MB

# [push] from localhost

[root@dlp ~]#

podman tag fedora dlp.srv.world:5000/fedora:latest

[root@dlp ~]#

podman push dlp.srv.world:5000/fedora:latest --tls-verify=false

[root@dlp ~]#

podman images

REPOSITORY                         TAG     IMAGE ID      CREATED     SIZE
registry.fedoraproject.org/fedora  latest  79fd58dc7611  9 days ago  181 MB
dlp.srv.world:5000/fedora          latest  79fd58dc7611  9 days ago  181 MB

# [pull] from another node

[root@node01 ~]#

podman pull dlp.srv.world:5000/fedora:latest --tls-verify=false

[root@node01 ~]#

podman images

REPOSITORY                 TAG     IMAGE ID      CREATED     SIZE
dlp.srv.world:5000/fedora  latest  79fd58dc7611  9 days ago  181 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

# add [-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:latest --tls-verify=false

Trying to pull dlp.srv.world:5000/fedora:latest...
  unauthorized: authentication required
Error: unable to pull dlp.srv.world:5000/fedora:latest: Error initializing source docker://dlp.srv.world:5000/fedora:latest: Error reading manifest latest 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:latest --tls-verify=false

[root@node01 ~]#

podman images

REPOSITORY                 TAG     IMAGE ID      CREATED     SIZE
dlp.srv.world:5000/fedora  latest  79fd58dc7611  9 days ago  181 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:latest

[root@node01 ~]#

podman images

REPOSITORY                 TAG     IMAGE ID      CREATED     SIZE
dlp.srv.world:5000/fedora  latest  79fd58dc7611  9 days ago  181 MB

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