redhat_subscription: stop manual unsubscribing on unregistration (#9578)
Unregistering a system also drops all the resources for it
automatically, so there is no need to manually unsubscribing (which
actually means removing all the subscriptions).
In addition to that, newer versions of subscription-manager drop all the
support for entitlements, so the "remove" subcommand (used by
unsubscribe()) does not exist anymore, and thus the unregistration fails
with those versions.
This fixes the registration on EL 10 systems, and Fedora 41 and greater.
(cherry picked from commit bcc92e8aac)
Co-authored-by: Pino Toscano <ptoscano@redhat.com>
The two RegistrationBase & Rhsm classes were copied from the ones in the
shared module_utils.redhat module; that said:
- the versions here got improvements over the years
- the RegistrationBase in module_utils.redhat is used only by the RHN
modules, which are deprecated and slated for removal
Hence, the classes here can be kept and simplified a bit:
- fold the non-dummy content of RegistrationBase into Rhsm: there is no
more need for the separate RegistrationBase base class
- drop the init arguments "username", "password", and "token": the
instance variables of them are not used anywhere, as the needed
credentials (together with other variables) are passed to the
register() method
- create the Rhsm object later in main(), after the AnsibleModule
creation and the uid check: this avoids the creation of Rhsm with a
null module variable, changing it later
There should be no behaviour change.
The module currently has a static 'required_if' statement for its
parameters that forces any of 'username' or 'activationkey' or 'token'
in case state=present; while this is generally a good idea, it can be
an extra requirements in some cases. In particular, if the system is
already registered, there is no need for credentials -- some of the
operations of the module, such as manipulating pools, can be done
perfectly without credentials.
Hence:
- change the static 'required_if' to require credentials only when
forcing the registration
- check for credentials manually when a registration is needed, i.e.
on an unregistered system; the fail message is the same as the one
shown by 'required_if'
Adapt the tests to this new situation:
- test_without_required_parameters now needs to mock an unregistered
system
- add a new version of test_without_required_parameters to test an
already registered system
- add a simple test case for only state=present usable on an already
registered system
- remove the credentials from a test case for pool attachment that
mocks an already registered system
subscription-manager on RHEL installs a symlink in /usr/bin to
console-helper (part of usermode), which triggers an interactive prompt
for root credentials when run as user. It seems that console-helper
does not handle well non-interactive contexts (e.g. without a TTY for
input), and thus it will hang waiting for input when run as user in an
Ansible task.
Since subscription-manager requires root already anyway (and it will
fail when explicitly run as user), then apply the same logic locally on
all the modules that interact with it: redhat_subscription,
rhsm_release, and rhsm_repository.
subscription-manager currently does not have a way to get credentials
(username, password, activation keys, organization ID) in a secure way:
the existing command line parameters can be easily spotted when running
a process listing while 'subscription-manager register' runs.
There is a D-Bus service, which is used by e.g. cockpit and Anaconda to
interface with RHSM (at least for registration and common queries).
Try to perform the registration using D-Bus, in a way very similar to
the work done in convert2rhel [1] (with my help):
- try to do a simple signal test to check whether the system bus works;
inspired by the login in the dconf module
- pass most of the options as registration options; for the few that are
not part of the registration, execute 'subscription-manager' manually
- add quirks for differently working (or not) registration options for
the D-Bus Register*() methods depending on the version of RHEL
- 'subscription-manager register' is used only in case the signal test
is not working; silent fallback in case of D-Bus errors during the
registration is not done on purpose to avoid silent fallback to a less
secure registration
[1] https://github.com/oamg/convert2rhel/pull/540/
Add the `server_proxy_scheme` parameter to configure the scheme used for
the proxy server. This completes the configuration parameters for the
proxy server.
Stop passing all the "rhsm_", and "server_" module arguments to
"Rhsm.register()", and thus as arguments for
"subscription-manager register":
- right before calling "Rhsm.register()", "Rhsm.configure()" is called
to configure subscription-manager with all the "rhsm_", and "server_"
arguments; hence, they are already configured
- the passed argument to "--serverurl" is partially wrong:
"Rhsm.register()" passes only the hostname, whereas the other bits
(port and prefix) are supported too; this "works" because port and
prefix were already configured previously, and the lax parsing that
subscription-manager does allows for missing bits
- the parsing done by subscription-manager for "--baseurl" strips out
the URL scheme and always uses https: this means that specifying
"rhsm_baseurl: http://server" as module parameter will be taken as
"https://server" by subscription-manager; since "rhsm_baseurl" is
already configured by "Rhsm.configure()", this issue is gone
patchback[bot]
Pino Toscano
Eric C Chong
Felix Fontein