Set up a Public Repository

There will likely be scenarios where you need to make images publicly available to all users.

About this task

The suggested method to do that is to create a keystone tenant/user = ‘registry’/’public’, which will therefore have access to images in the registry.local:9001/public/ repository. Then share access to those images by sharing the registry/public user’s credentials with other users.

Procedure

  1. Create the keystone tenant/user of registry/public.

    ~(keystone_admin)$ openstack project create registry
    ~(keystone_admin)$ TENANTNAME="registry"
    ~(keystone_admin)$ TENANTID=`openstack project list | grep ${TENANTNAME} | awk '{print $2}'`
    ~(keystone_admin)$ USERNAME="public"
    ~(keystone_admin)$ USERPASSWORD="${USERNAME}K8*"
    ~(keystone_admin)$ openstack user create --password ${USERPASSWORD} --project ${TENANTID} ${USERNAME}
    ~(keystone_admin)$ openstack role add --project ${TENANTNAME} --user ${USERNAME} _member
    
  2. Create a secret containing the credentials of the public repository in kube-system namespace.

    % kubectl create secret docker-registry registry-local-public-key --docker-server=registry.local:9001 --docker-username=public --docker-password=public --docker-email=noreply@windriver.com -n kube-system
    
  3. Share the credentials of the public repository with other namespaces.

    Copy the secret to the other namespace and add it as an ImagePullSecret to the namespace’s default serviceAccount.

    % kubectl get secret registry-local-public-key -n kube-system -o yaml | grep -v '^\s*namespace:\s'  | kubectl apply --namespace=<USERNAMESPACE> -f -
    % kubectl patch serviceaccount default  -p "{\"imagePullSecrets\": [{\"name\": \"registry-local-public-key\"}]}" -n <USERNAMESPACE>