[pve-devel] [PATCH docs v3 1/1] fix #4411: openid: add docs for openid groups support

[Thomas Skinner]

Signed-off-by: Thomas Skinner <thomas at atskinner.net>
---
 pveum.adoc | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/pveum.adoc b/pveum.adoc
index 81565ab..1166f17 100644
--- a/pveum.adoc
+++ b/pveum.adoc
@@ -456,6 +456,15 @@ use the `autocreate` option to automatically add new users.
 * `Username Claim` (`username-claim`): OpenID claim used to generate the unique
 username (`subject`, `username` or `email`).
 
+* `Autocreate Groups` (`groups-autocreate`): Create all groups in the claim
+instead of using existing PVE groups (default behavior).
+
+* `Groups Claim` (`groups-claim`): OpenID claim used to retrieve the groups from
+the ID token or userinfo endpoint.
+
+* `Overwrite Groups` (`groups-overwrite`): Overwrite all groups assigned to user
+instead of appending to existing groups (default behavior).
+
 Username mapping
 ^^^^^^^^^^^^^^^^
 
@@ -479,6 +488,41 @@ Another option is to use `email`, which also yields human readable
 usernames. Again, only use this setting if the server guarantees the
 uniqueness of this attribute.
 
+Groups mapping
+^^^^^^^^^^^^^^
+
+Specifying the `groups-claim` setting in the OpenID configuration enables group
+mapping functionality. The data provided in the `groups-claim` should be
+a list of strings that correspond to groups that a user should be a member of in
+{pve}. To prevent collisions, group names from the OpenID claim are suffixed 
+with `-<realm name>` (e.g. for the OpenID group name `my-openid-group` in the 
+realm `oidc`, the group name in {pve} would be `my-openid-group-oidc`).
+
+Any groups reported by the OpenID provider that do not exist in {pve} are
+ignored by default. If all groups reported by the OpenID provider should exist
+in {pve}, the `groups-autocreate` option may be used to automatically create
+these groups on user logins.
+
+By default, groups are appended to the user's existing groups. It may be 
+desirable to overwrite any groups that the user is already a member in {pve}
+with those from the OpenID provider. Enabling the `groups-overwrite` setting
+removes all groups from the user in {pve} before adding the groups reported by
+the OpenID provider.
+
+In some cases, OpenID servers may send groups claims which include invalid
+characters for {pve} group IDs. By default, each invalid character is replaced
+with an underscore (`'_'`). To adjust the character used for replacement, adjust 
+the `groups-replace-character` setting to any valid character for a {pve} group
+ID (i.e. includes alphanumeric characters and any of the following: `'-'`,
+`'_'`, `'.'`).
+
+Advanced settings
+^^^^^^^^^^^^^^^^^
+
+* `Groups Replacement Character` (`groups-replace-character`): Character to
+replace invalid characters in groups names from the OpenID provider. Default
+behavior is to replace each invalid character with an underscore (`'_'`).
+
 Examples
 ^^^^^^^^
 
-- 
2.39.5