Disclaimer - Work in progress

The repository you are looking into is work in progress.

It contains proof of concept and preview builds in development created in context of the openDesk project.

The repository's content provides you with first insights into the containerized cloud IAM from Univention, derived from the UCS appliance.

Container for the Univention Management Console

Secrets and Certificates

Three files are needed:

• ssl/certs/CAcert.pem: the public key of the UCS CA certificate
• ssl/certs/cert.pem: the public key of the particular UCS instance certificate
• ssl/secret/private.key: the private key of the particular UCS instance certificate

The SSL keys and certificates can be fetched from a UCS machine:

1. Create ansible/inventory/hosts.yaml based on the provided example file and insert your IP address.

2. Run the playbook:

   ansible-playbook -i ansible/inventory/hosts.yaml ansible/fetch-secrets-from-ucs-machine.yaml
   

   The playbook will populate the .env.umc-gateway and .env.umc-server files.

   The playbook will also create docker-compose.override.yaml where the extra_hosts entries are used to map the LDAP server's IP address to its hostname. This is necessary as the LDAP library checks the TLS certificate against the hostname.

LDAP Configuration

The following variables need to be set according to your LDAP server:

LDAP_HOST=primary.example.com
LDAP_PORT=7389
LDAP_BASE_DN=dc=example,dc=org
LDAP_HOST_DN=cn=ucs-1234,cn=dc,cn=computers,dc=example,dc=org

TLS

TLS can be controlled by the TLS_MODE flag which defaults to "secure". The CA_CERT_FILE must point to the CA certificate which signed the LDAP server certificate, in PEM format.

Other options are "unvalidated" which attempts to use TLS but will not fail if the server certificate cannot be validated or "off" which disables TLS completely (not recommended).

SAML Configuration

The following variables in .env.umc-server pertain to the SAML SSO configuration:

SAML_METADATA_URL=http://localhost:8097/realms/ucs/protocol/saml/descriptor
SAML_METADATA_URL_INTERNAL=http://keycloak:8080/realms/ucs/protocol/saml/descriptor
SAML_SP_SERVER=localhost:8000
SAML_SCHEMES=http
CERT_PEM_FILE=/run/secrets/cert_pem
PRIVATE_KEY_FILE=/run/secrets/private_key

The SAML_METADATA_URL should include the public FQDN of the SAML IdP.

For development purposes there is SAML_METADATA_URL_INTERNAL which should be set if the UMC container cannot reach SAML_METADATA_URL and needs to use a cluster-internal hostname.

SAML_SCHEMES configures the preference for generating SAML Consumer Service Assertions. The default in UCS is "https, http", which you might consider setting to "http" for development purposes (only!), and "https" for production.

In any case, using SAML requires a certificate and its private key under CERT_PEM_FILE and PRIVATE_KEY_FILE. The certificate's subject hostname shall contain the value of SAML_SP_SERVER.

Container for the Apache Gateway

This contains merely static files, such as javascript, stylesheets and images.