pveum(1)
| PVEUM(1) | Proxmox VE Documentation | PVEUM(1) |
NAME
pveum - Proxmox VE User Manager
SYNOPSIS
pveum <COMMAND> [ARGS] [OPTIONS]
pveum acl delete <path> --roles <string> [OPTIONS]
Update Access Control List (add or remove permissions).
<path>: <string>
--groups <string>
--propagate <boolean> (default = 1)
--roles <string>
--tokens <string>
--users <string>
pveum acl list [FORMAT_OPTIONS]
Get Access Control List (ACLs).
pveum acl modify <path> --roles <string> [OPTIONS]
Update Access Control List (add or remove permissions).
<path>: <string>
--groups <string>
--propagate <boolean> (default = 1)
--roles <string>
--tokens <string>
--users <string>
pveum acldel
An alias for pveum acl delete.
pveum aclmod
An alias for pveum acl modify.
pveum group add <groupid> [OPTIONS]
Create new group.
<groupid>: <string>
--comment <string>
pveum group delete <groupid>
Delete group.
<groupid>: <string>
pveum group list [FORMAT_OPTIONS]
Group index.
pveum group modify <groupid> [OPTIONS]
Update group data.
<groupid>: <string>
--comment <string>
pveum groupadd
An alias for pveum group add.
pveum groupdel
An alias for pveum group delete.
pveum groupmod
An alias for pveum group modify.
pveum help [OPTIONS]
Get help about specified command.
--extra-args <array>
--verbose <boolean>
pveum passwd <userid>
Change user password.
<userid>: <string>
pveum pool add <poolid> [OPTIONS]
Create new pool.
<poolid>: <string>
--comment <string>
pveum pool delete <poolid>
Delete pool.
<poolid>: <string>
pveum pool list [FORMAT_OPTIONS]
Pool index.
pveum pool modify <poolid> [OPTIONS]
Update pool data.
<poolid>: <string>
--comment <string>
--delete <boolean>
--storage <string>
--vms <string>
pveum realm add <realm> --type <string> [OPTIONS]
Add an authentication server.
<realm>: <string>
--acr-values <string>
--autocreate <boolean> (default = 0)
--base_dn (?^:\w+=(?^:("[^"]+"|[^ ,+"/<>;=#][^,+"/<>;=]*[^ ,+"/<>;=]|[^ ,+"/<>;=#]))(,\s*\w+=(?^:("[^"]+"|[^ ,+"/<>;=#][^,+"/<>;=]*[^ ,+"/<>;=]|[^ ,+"/<>;=#])))*)
--bind_dn (?^:\w+=(?^:("[^"]+"|[^ ,+"/<>;=#][^,+"/<>;=]*[^ ,+"/<>;=]|[^ ,+"/<>;=#]))(,\s*\w+=(?^:("[^"]+"|[^ ,+"/<>;=#][^,+"/<>;=]*[^ ,+"/<>;=]|[^ ,+"/<>;=#])))*)
--capath <string> (default = /etc/ssl/certs)
--case-sensitive <boolean> (default = 1)
--cert <string>
--certkey <string>
--client-id <string>
--client-key <string>
--comment <string>
--default <boolean>
--domain \S+
--filter <string>
--group_classes <string> (default = groupOfNames, group, univentionGroup, ipausergroup)
--group_dn (?^:\w+=(?^:("[^"]+"|[^ ,+"/<>;=#][^,+"/<>;=]*[^ ,+"/<>;=]|[^ ,+"/<>;=#]))(,\s*\w+=(?^:("[^"]+"|[^ ,+"/<>;=#][^,+"/<>;=]*[^ ,+"/<>;=]|[^ ,+"/<>;=#])))*)
--group_filter <string>
--group_name_attr <string>
--issuer-url <string>
--mode <ldap | ldap+starttls | ldaps> (default = ldap)
--password <string>
--port <integer> (1 - 65535)
--prompt (?:none|login|consent|select_account|\S+)
--scopes <string> (default = email profile)
--secure <boolean>
--server1 <string>
--server2 <string>
--sslversion <tlsv1 | tlsv1_1 | tlsv1_2 | tlsv1_3>
--sync-defaults-options [enable-new=<1|0>] [,full=<1|0>] [,purge=<1|0>] [,remove-vanished=([acl];[properties];[entry])|none] [,scope=<users|groups|both>]
--sync_attributes \w+=[^,]+(,\s*\w+=[^,]+)*
--tfa type=<TFATYPE> [,digits=<COUNT>] [,id=<ID>] [,key=<KEY>] [,step=<SECONDS>] [,url=<URL>]
--type <ad | ldap | openid | pam | pve>
--user_attr \S{2,}
--user_classes <string> (default = inetorgperson, posixaccount, person, user)
--username-claim <string>
--verify <boolean> (default = 0)
pveum realm delete <realm>
Delete an authentication server.
<realm>: <string>
pveum realm list [FORMAT_OPTIONS]
Authentication domain index.
pveum realm modify <realm> [OPTIONS]
Update authentication server settings.
<realm>: <string>
--acr-values <string>
--autocreate <boolean> (default = 0)
--base_dn (?^:\w+=(?^:("[^"]+"|[^ ,+"/<>;=#][^,+"/<>;=]*[^ ,+"/<>;=]|[^ ,+"/<>;=#]))(,\s*\w+=(?^:("[^"]+"|[^ ,+"/<>;=#][^,+"/<>;=]*[^ ,+"/<>;=]|[^ ,+"/<>;=#])))*)
--bind_dn (?^:\w+=(?^:("[^"]+"|[^ ,+"/<>;=#][^,+"/<>;=]*[^ ,+"/<>;=]|[^ ,+"/<>;=#]))(,\s*\w+=(?^:("[^"]+"|[^ ,+"/<>;=#][^,+"/<>;=]*[^ ,+"/<>;=]|[^ ,+"/<>;=#])))*)
--capath <string> (default = /etc/ssl/certs)
--case-sensitive <boolean> (default = 1)
--cert <string>
--certkey <string>
--client-id <string>
--client-key <string>
--comment <string>
--default <boolean>
--delete <string>
--digest <string>
--domain \S+
--filter <string>
--group_classes <string> (default = groupOfNames, group, univentionGroup, ipausergroup)
--group_dn (?^:\w+=(?^:("[^"]+"|[^ ,+"/<>;=#][^,+"/<>;=]*[^ ,+"/<>;=]|[^ ,+"/<>;=#]))(,\s*\w+=(?^:("[^"]+"|[^ ,+"/<>;=#][^,+"/<>;=]*[^ ,+"/<>;=]|[^ ,+"/<>;=#])))*)
--group_filter <string>
--group_name_attr <string>
--issuer-url <string>
--mode <ldap | ldap+starttls | ldaps> (default = ldap)
--password <string>
--port <integer> (1 - 65535)
--prompt (?:none|login|consent|select_account|\S+)
--scopes <string> (default = email profile)
--secure <boolean>
--server1 <string>
--server2 <string>
--sslversion <tlsv1 | tlsv1_1 | tlsv1_2 | tlsv1_3>
--sync-defaults-options [enable-new=<1|0>] [,full=<1|0>] [,purge=<1|0>] [,remove-vanished=([acl];[properties];[entry])|none] [,scope=<users|groups|both>]
--sync_attributes \w+=[^,]+(,\s*\w+=[^,]+)*
--tfa type=<TFATYPE> [,digits=<COUNT>] [,id=<ID>] [,key=<KEY>] [,step=<SECONDS>] [,url=<URL>]
--user_attr \S{2,}
--user_classes <string> (default = inetorgperson, posixaccount, person, user)
--verify <boolean> (default = 0)
pveum realm sync <realm> [OPTIONS]
Syncs users and/or groups from the configured LDAP to user.cfg. NOTE: Synced groups will have the name name-$realm, so make sure those groups do not exist to prevent overwriting.
<realm>: <string>
--dry-run <boolean> (default = 0)
--enable-new <boolean> (default = 1)
--full <boolean>
--purge <boolean>
--remove-vanished ([acl];[properties];[entry])|none (default = none)
--scope <both | groups | users>
pveum role add <roleid> [OPTIONS]
Create new role.
<roleid>: <string>
--privs <string>
pveum role delete <roleid>
Delete role.
<roleid>: <string>
pveum role list [FORMAT_OPTIONS]
Role index.
pveum role modify <roleid> [OPTIONS]
Update an existing role.
<roleid>: <string>
--append <boolean>
Note
Requires option(s): privs
--privs <string>
pveum roleadd
An alias for pveum role add.
pveum roledel
An alias for pveum role delete.
pveum rolemod
An alias for pveum role modify.
pveum ticket <username> [OPTIONS]
Create or verify authentication ticket.
<username>: <string>
--new-format <boolean> (default = 0)
--otp <string>
--path <string>
Note
Requires option(s): privs
--privs <string>
Note
Requires option(s): path
--realm <string>
--tfa-challenge <string>
pveum user add <userid> [OPTIONS]
Create new user.
<userid>: <string>
--comment <string>
--email <string>
--enable <boolean> (default = 1)
--expire <integer> (0 - N)
--firstname <string>
--groups <string>
--keys <string>
--lastname <string>
--password <string>
pveum user delete <userid>
Delete user.
<userid>: <string>
pveum user list [OPTIONS] [FORMAT_OPTIONS]
User index.
--enabled <boolean>
--full <boolean> (default = 0)
pveum user modify <userid> [OPTIONS]
Update user configuration.
<userid>: <string>
--append <boolean>
Note
Requires option(s): groups
--comment <string>
--email <string>
--enable <boolean> (default = 1)
--expire <integer> (0 - N)
--firstname <string>
--groups <string>
--keys <string>
--lastname <string>
pveum user permissions [<userid>] [OPTIONS] [FORMAT_OPTIONS]
Retrieve effective permissions of given user/token.
<userid>: (?^:^(?^:[^\s:/]+)\@(?^:[A-Za-z][A-Za-z0-9\.\-_]+)(?:!(?^:[A-Za-z][A-Za-z0-9\.\-_]+))?$)
--path <string>
pveum user tfa delete <userid> [OPTIONS]
Delete TFA entries from a user.
<userid>: <string>
--id <string>
pveum user token add <userid> <tokenid> [OPTIONS] [FORMAT_OPTIONS]
Generate a new API token for a specific user. NOTE: returns API token value, which needs to be stored as it cannot be retrieved afterwards!
<userid>: <string>
<tokenid>: (?^:[A-Za-z][A-Za-z0-9\.\-_]+)
--comment <string>
--expire <integer> (0 - N) (default = same as user)
--privsep <boolean> (default = 1)
pveum user token list <userid> [FORMAT_OPTIONS]
Get user API tokens.
<userid>: <string>
pveum user token modify <userid> <tokenid> [OPTIONS] [FORMAT_OPTIONS]
Update API token for a specific user.
<userid>: <string>
<tokenid>: (?^:[A-Za-z][A-Za-z0-9\.\-_]+)
--comment <string>
--expire <integer> (0 - N) (default = same as user)
--privsep <boolean> (default = 1)
pveum user token permissions <userid> <tokenid> [OPTIONS] [FORMAT_OPTIONS]
Retrieve effective permissions of given token.
<userid>: <string>
<tokenid>: (?^:[A-Za-z][A-Za-z0-9\.\-_]+)
--path <string>
pveum user token remove <userid> <tokenid> [FORMAT_OPTIONS]
Remove API token for a specific user.
<userid>: <string>
<tokenid>: (?^:[A-Za-z][A-Za-z0-9\.\-_]+)
pveum useradd
An alias for pveum user add.
pveum userdel
An alias for pveum user delete.
pveum usermod
An alias for pveum user modify.
DESCRIPTION
Proxmox VE supports multiple authentication sources, for example Linux PAM, an integrated Proxmox VE authentication server, LDAP, Microsoft Active Directory and OpenID Connect.
By using role-based user and permission management for all objects (VMs, Storage, nodes, etc.), granular access can be defined.
USERS
Proxmox VE stores user attributes in /etc/pve/user.cfg. Passwords are not stored here; users are instead associated with the authentication realms (man pveum(1)) described below. Therefore, a user is often internally identified by their username and realm in the form <userid>@<realm>.
Each user entry in this file contains the following information:
Caution
When you disable or delete a user, or if the expiry date set is in the past, this user will not be able to log in to new sessions or start new tasks. All tasks which have already been started by this user (for example, terminal sessions) will not be terminated automatically by any such event.
System administrator
The system’s root user can always log in via the Linux PAM realm and is an unconfined administrator. This user cannot be deleted, but attributes can still be changed. System mails will be sent to the email address assigned to this user.
GROUPS
Each user can be a member of several groups. Groups are the preferred way to organize access permissions. You should always grant permissions to groups instead of individual users. That way you will get a much more maintainable access control list.
API TOKENS
API tokens allow stateless access to most parts of the REST API from another system, software or API client. Tokens can be generated for individual users and can be given separate permissions and expiration dates to limit the scope and duration of the access. Should the API token get compromised, it can be revoked without disabling the user itself.
API tokens come in two basic types:
Caution
The token value is only displayed/returned once when the token is generated. It cannot be retrieved again over the API at a later time!
To use an API token, set the HTTP header Authorization to the displayed value of the form PVEAPIToken=USER@REALM!TOKENID=UUID when making API requests, or refer to your API client’s documentation.
RESOURCE POOLS
A resource pool is a set of virtual machines, containers, and storage devices. It is useful for permission handling in cases where certain users should have controlled access to a specific set of resources, as it allows for a single permission to be applied to a set of elements, rather than having to manage this on a per-resource basis. Resource pools are often used in tandem with groups, so that the members of a group have permissions on a set of machines and storage.
AUTHENTICATION REALMS
As Proxmox VE users are just counterparts for users existing on some external realm, the realms have to be configured in /etc/pve/domains.cfg. The following realms (authentication methods) are available:
Linux PAM Standard Authentication
Proxmox VE Authentication Server
LDAP
Microsoft Active Directory (AD)
OpenID Connect
Linux PAM Standard Authentication
As Linux PAM corresponds to host system users, a system user must exist on each node which the user is allowed to log in on. The user authenticates with their usual system password. This realm is added by default and can’t be removed. In terms of configurability, an administrator can choose to require two-factor authentication with logins from the realm and to set the realm as the default authentication realm.
Proxmox VE Authentication Server
The Proxmox VE authentication server realm is a simple Unix-like password store. The realm is created by default, and as with Linux PAM, the only configuration items available are the ability to require two-factor authentication for users of the realm, and to set it as the default realm for login.
Unlike the other Proxmox VE realm types, users are created and authenticated entirely through Proxmox VE, rather than authenticating against another system. Hence, you are required to set a password for this type of user upon creation.
LDAP
You can also use an external LDAP server for user authentication (for examle, OpenLDAP). In this realm type, users are searched under a Base Domain Name (base_dn), using the username attribute specified in the User Attribute Name (user_attr) field.
A server and optional fallback server can be configured, and the connection can be encrypted via SSL. Furthermore, filters can be configured for directories and groups. Filters allow you to further limit the scope of the realm.
For instance, if a user is represented via the following LDIF dataset:
# user1 of People at ldap-test.com dn: uid=user1,ou=People,dc=ldap-test,dc=com objectClass: top objectClass: person objectClass: organizationalPerson objectClass: inetOrgPerson uid: user1 cn: Test User 1 sn: Testers description: This is the first test user.
The Base Domain Name would be ou=People,dc=ldap-test,dc=com and the user attribute would be uid.
If Proxmox VE needs to authenticate (bind) to the LDAP server before being able to query and authenticate users, a bind domain name can be configured via the bind_dn property in /etc/pve/domains.cfg. Its password then has to be stored in /etc/pve/priv/ldap/<realmname>.pw (for example, /etc/pve/priv/ldap/my-ldap.pw). This file should contain a single line with the raw password.
To verify certificates, you need to set capath. You can set it either directly to the CA certificate of your LDAP server, or to the system path containing all trusted CA certificates (/etc/ssl/certs). Additionally, you need to set the verify option, which can also be done over the web interface.
The main configuration options for an LDAP server realm are as follows:
Note
In order to allow a particular user to authenticate using the LDAP server, you must also add them as a user of that realm from the Proxmox VE server. This can be carried out automatically with * syncing* (man pveum(1)).
Microsoft Active Directory (AD)
To set up Microsoft AD as a realm, a server address and authentication domain need to be specified. Active Directory supports most of the same properties as LDAP, such as an optional fallback server, port, and SSL encryption. Furthermore, users can be added to Proxmox VE automatically via * sync* (man pveum(1)) operations, after configuration.
As with LDAP, if Proxmox VE needs to authenticate before it binds to the AD server, you must configure the Bind User (bind_dn) property. This property is typically required by default for Microsoft AD.
The main configuration settings for Microsoft Active Directory are:
Syncing LDAP-Based Realms
It’s possible to automatically sync users and groups for LDAP-based realms (LDAP & Microsoft Active Directory), rather than having to add them to Proxmox VE manually. You can access the sync options from the Add/Edit window of the web interface’s Authentication panel or via the pveum realm add/modify commands. You can then carry out the sync operation from the Authentication panel of the GUI or using the following command:
pveum realm sync <realm>
Users and groups are synced to the cluster-wide configuration file, /etc/pve/user.cfg.
Attributes to Properties
If the sync response includes user attributes, they will be synced into the matching user property in the user.cfg. For example: firstname or lastname.
If the names of the attributes are not matching the Proxmox VE properties, you can set a custom field-to-field map in the config by using the sync_attributes option.
How such properties are handled if anything vanishes can be controlled via the sync options, see below.
Sync Configuration
The configuration options for syncing LDAP-based realms can be found in the Sync Options tab of the Add/Edit window.
The configuration options are as follows:
Note
Filters allow you to create a set of additional match criteria, to narrow down the scope of a sync. Information on available LDAP filter types and their usage can be found at ldap.com[1].
Sync Options
In addition to the options specified in the previous section, you can also configure further options that describe the behavior of the sync operation.
These options are either set as parameters before the sync, or as defaults via the realm option sync-defaults-options.
The main options for syncing are:
Reserved characters
Certain characters are reserved (see RFC2253[2]) and cannot be easily used in attribute values in DNs without being escaped properly.
Following characters need escaping:
To use such characters in DNs, surround the attribute value in double quotes. For example, to bind with a user with the CN (Common Name) Example, User, use CN="Example, User",OU=people,DC=example,DC=com as value for bind_dn.
This applies to the base_dn, bind_dn, and group_dn attributes.
Note
Users with colons and forward slashes cannot be synced since these are reserved characters in usernames.
OpenID Connect
The main OpenID Connect configuration options are:
While it is possible to use unencrypted http:// URLs, we strongly recommend to use encrypted https:// connections.
Username mapping
The OpenID Connect specification defines a single unique attribute (claim in OpenID terms) named subject. By default, we use the value of this attribute to generate Proxmox VE usernames, by simple adding @ and the realm name: ${subject}@${realm}.
Unfortunately, most OpenID servers use random strings for subject, like DGH76OKH34BNG3245SB, so a typical username would look like DGH76OKH34BNG3245SB@yourrealm. While unique, it is difficult for humans to remember such random strings, making it quite impossible to associate real users with this.
The username-claim setting allows you to use other attributes for the username mapping. Setting it to username is preferred if the OpenID Connect server provides that attribute and guarantees its uniqueness.
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.
Examples
Here is an example of creating an OpenID realm using Google. You need to replace --client-id and --client-key with the values from your Google OpenID settings.
pveum realm add myrealm1 --type openid --issuer-url https://accounts.google.com --client-id XXXX --client-key YYYY --username-claim email
The above command uses --username-claim email, so that the usernames on the Proxmox VE side look like example.user@google.com@myrealm1.
Keycloak (https://www.keycloak.org/) is a popular open source Identity and Access Management tool, which supports OpenID Connect. In the following example, you need to replace the --issuer-url and --client-id with your information:
pveum realm add myrealm2 --type openid --issuer-url https://your.server:8080/realms/your-realm --client-id XXX --username-claim username
Using --username-claim username enables simple usernames on the Proxmox VE side, like example.user@myrealm2.
Warning
You need to ensure that the user is not allowed to edit the username setting themselves (on the Keycloak server).
TWO-FACTOR AUTHENTICATION
There are two ways to use two-factor authentication:
It can be required by the authentication realm, either via TOTP (Time-based One-Time Password) or YubiKey OTP. In this case, a newly created user needs to have their keys added immediately, as there is no way to log in without the second factor. In the case of TOTP, users can also change the TOTP later on, provided they can log in first.
Alternatively, users can choose to opt-in to two-factor authentication later on, even if the realm does not enforce it.
Available Second Factors
You can set up multiple second factors, in order to avoid a situation in which losing your smartphone or security key locks you out of your account permanently.
The following two-factor authentication methods are available in addition to realm-enforced TOTP and YubiKey OTP:
Before WebAuthn was supported, U2F could be setup by the user. Existing U2F factors can still be used, but it is recommended to switch to WebAuthn, once it is configured on the server.
Realm Enforced Two-Factor Authentication
This can be done by selecting one of the available methods via the TFA dropdown box when adding or editing an Authentication Realm. When a realm has TFA enabled, it becomes a requirement, and only users with configured TFA will be able to log in.
Currently there are two methods available:
Time-based OATH (TOTP)
A user can have multiple keys configured (separated by spaces), and the keys can be specified in Base32 (RFC3548) or hexadecimal notation.
Proxmox VE provides a key generation tool (oathkeygen) which prints out a random key in Base32 notation, that can be used directly with various OTP tools, such as the oathtool command line tool, or on Android Google Authenticator, FreeOTP, andOTP or similar applications.
YubiKey OTP
Please refer to the YubiKey OTP[5] documentation for how to use the YubiCloud[6] or host your own verification server[7].
User Configured TOTP Authentication
Users can choose to enable TOTP or WebAuthn as a second factor on login, via the TFA button in the user list (unless the realm enforces YubiKey OTP).
Users can always add and use one time Recovery Keys.
After opening the TFA window, the user is presented with a dialog to set up TOTP authentication. The Secret field contains the key, which can be randomly generated via the Randomize button. An optional Issuer Name can be added to provide information to the TOTP app about what the key belongs to. Most TOTP apps will show the issuer name together with the corresponding OTP values. The username is also included in the QR code for the TOTP app.
After generating a key, a QR code will be displayed, which can be used with most OTP apps such as FreeOTP. The user then needs to verify the current user password (unless logged in as root), as well as the ability to correctly use the TOTP key, by typing the current OTP value into the Verification Code field and pressing the Apply button.
TOTP
There is no server setup required. Simply install a TOTP app on your smartphone (for example, FreeOTP[8]) and use the Proxmox Backup Server web-interface to add a TOTP factor.
WebAuthn
For WebAuthn to work, you need to have two things:
Once you have fulfilled both of these requirements, you can add a WebAuthn configuration in the Two Factor panel under Datacenter → Permissions → Two Factor.
Recovery Keys
Recovery key codes do not need any preparation; you can simply create a set of recovery keys in the Two Factor panel under Datacenter → Permissions → Two Factor.
Note
There can only be one set of single-use recovery keys per user at any time.
Server Side Webauthn Configuration
To allow users to use WebAuthn authentication, it is necessaary to use a valid domain with a valid SSL certificate, otherwise some browsers may warn or refuse to authenticate altogether.
Note
Changing the WebAuthn configuration may render all existing WebAuthn registrations unusable!
This is done via /etc/pve/datacenter.cfg. For instance:
webauthn: rp=mypve.example.com,origin=https://mypve.example.com:8006,id=mypve.example.com
Server Side U2F Configuration
Note
It is recommended to use WebAuthn instead.
To allow users to use U2F authentication, it may be necessary to use a valid domain with a valid SSL certificate, otherwise, some browsers may print a warning or reject U2F usage altogether. Initially, an AppId [10] needs to be configured.
Note
Changing the AppId will render all existing U2F registrations unusable!
This is done via /etc/pve/datacenter.cfg. For instance:
u2f: appid=https://mypve.example.com:8006
For a single node, the AppId can simply be the address of the web-interface, exactly as it is used in the browser, including the https:// and the port, as shown above. Please note that some browsers may be more strict than others when matching AppIds.
When using multiple nodes, it is best to have a separate https server providing an appid.json [11] file, as it seems to be compatible with most browsers. If all nodes use subdomains of the same top level domain, it may be enough to use the TLD as AppId. It should however be noted that some browsers may not accept this.
Note
A bad AppId will usually produce an error, but we have encountered situations when this does not happen, particularly when using a top level domain AppId for a node that is accessed via a subdomain in Chromium. For this reason it is recommended to test the configuration with multiple browsers, as changing the AppId later will render existing U2F registrations unusable.
Activating U2F as a User
To enable U2F authentication, open the TFA window’s U2F tab, type in the current password (unless logged in as root), and press the Register button. If the server is set up correctly and the browser accepts the server’s provided AppId, a message will appear prompting the user to press the button on the U2F device (if it is a YubiKey, the button light should be toggling on and off steadily, roughly twice per second).
Firefox users may need to enable security.webauth.u2f via about:config before they can use a U2F token.
PERMISSION MANAGEMENT
In order for a user to perform an action (such as listing, modifying or deleting parts of a VM’s configuration), the user needs to have the appropriate permissions.
Proxmox VE uses a role and path based permission management system. An entry in the permissions table allows a user, group or token to take on a specific role when accessing an object or path. This means that such an access rule can be represented as a triple of (path, user, role), (path, group, role) or (path, token, role), with the role containing a set of allowed actions, and the path representing the target of these actions.
Roles
A role is simply a list of privileges. Proxmox VE comes with a number of predefined roles, which satisfy most requirements.
You can see the whole set of predefined roles in the GUI.
You can add new roles via the GUI or the command line.
From the GUI, navigate to the Permissions → Roles tab from Datacenter and click on the Create button. There you can set a role name and select any desired privileges from the Privileges drop-down menu.
To add a role through the command line, you can use the pveum CLI tool, for example:
pveum role add PVE_Power-only --privs "VM.PowerMgmt VM.Console" pveum role add Sys_Power-only --privs "Sys.PowerMgmt Sys.Console"
Privileges
A privilege is the right to perform a specific action. To simplify management, lists of privileges are grouped into roles, which can then be used in the permission table. Note that privileges cannot be directly assigned to users and paths without being part of a role.
We currently support the following privileges:
Node / System related privileges
Virtual machine related privileges
Storage related privileges
Objects and Paths
Access permissions are assigned to objects, such as virtual machines, storages or resource pools. We use file system like paths to address these objects. These paths form a natural tree, and permissions of higher levels (shorter paths) can optionally be propagated down within this hierarchy.
Paths can be templated. When an API call requires permissions on a templated path, the path may contain references to parameters of the API call. These references are specified in curly braces. Some parameters are implicitly taken from the API call’s URI. For instance, the permission path /nodes/{node} when calling /nodes/mynode/status requires permissions on /nodes/mynode, while the path {path} in a PUT request to /access/acl refers to the method’s path parameter.
Some examples are:
Inheritance
As mentioned earlier, object paths form a file system like tree, and permissions can be inherited by objects down that tree (the propagate flag is set by default). We use the following inheritance rules:
Additionally, privilege separated tokens can never have permissions on any given path that their associated user does not have.
Pools
Pools can be used to group a set of virtual machines and datastores. You can then simply set permissions on pools (/pool/{poolid}), which are inherited by all pool members. This is a great way to simplify access control.
Which Permissions Do I Need?
The required API permissions are documented for each individual method, and can be found at https://pve.basealt.ru/pve-docs/api-viewer/.
The permissions are specified as a list, which can be interpreted as a tree of logic and access-check functions:
["and", <subtests>...] and ["or", <subtests>...]
["perm", <path>, [ <privileges>... ], <options>...]
["userid-group", [ <privileges>... ], <options>...]
["userid-param", "self"]
["userid-param", "Realm.AllocateUser"]
["perm-modify", <path>]
If the path is empty, Permission.Modify on /access is required.
COMMAND LINE TOOL
Most users will simply use the GUI to manage users. But there is also a fully featured command line tool called pveum (short for “Proxmox VE User Manager”). Please note that all Proxmox VE command line tools are wrappers around the API, so you can also access those functions through the REST API.
Here are some simple usage examples. To show help, type:
pveum
or (to show detailed help about a specific command)
pveum help user add
Create a new user:
pveum user add testuser@pve -comment "Just a test"
Set or change the password (not all realms support this):
pveum passwd testuser@pve
Disable a user:
pveum user modify testuser@pve -enable 0
Create a new group:
pveum group add testgroup
Create a new role:
pveum role add PVE_Power-only -privs "VM.PowerMgmt VM.Console"
REAL WORLD EXAMPLES
Administrator Group
It is possible that an administrator would want to create a group of users with full administrator rights (without using the root account).
To do this, first define the group:
pveum group add admin -comment "System Administrators"
Then assign the role:
pveum acl modify / -group admin -role Administrator
Finally, you can add users to the new admin group:
pveum user modify testuser@pve -group admin
Auditors
You can give read only access to users by assigning the PVEAuditor role to users or groups.
Example 1: Allow user joe@pve to see everything
pveum acl modify / -user joe@pve -role PVEAuditor
Example 2: Allow user joe@pve to see all virtual machines
pveum acl modify /vms -user joe@pve -role PVEAuditor
Delegate User Management
If you want to delegate user management to user joe@pve, you can do that with:
pveum acl modify /access -user joe@pve -role PVEUserAdmin
User joe@pve can now add and remove users, and change other user attributes, such as passwords. This is a very powerful role, and you most likely want to limit it to selected realms and groups. The following example allows joe@pve to modify users within the realm pve, if they are members of group customers:
pveum acl modify /access/realm/pve -user joe@pve -role PVEUserAdmin pveum acl modify /access/groups/customers -user joe@pve -role PVEUserAdmin
Note
The user is able to add other users, but only if they are members of the group customers and within the realm pve.
Limited API Token for Monitoring
Permissions on API tokens are always a subset of those of their corresponding user, meaning that an API token can’t be used to carry out a task that the backing user has no permission to do. This section will demonstrate how you can use an API token with separate privileges, to limit the token owner’s permissions further.
Give the user joe@pve the role PVEVMAdmin on all VMs:
pveum acl modify /vms -user joe@pve -role PVEVMAdmin
Add a new API token with separate privileges, which is only allowed to view VM information (for example, for monitoring purposes):
pveum user token add joe@pve monitoring -privsep 1 pveum acl modify /vms -token 'joe@pve!monitoring' -role PVEAuditor
Verify the permissions of the user and token:
pveum user permissions joe@pve pveum user token permissions joe@pve monitoring
Resource Pools
An enterprise is usually structured into several smaller departments, and it is common that you want to assign resources and delegate management tasks to each of these. Let’s assume that you want to set up a pool for a software development department. First, create a group:
pveum group add developers -comment "Our software developers"
Now we create a new user which is a member of that group:
pveum user add developer1@pve -group developers -password
Note
The "-password" parameter will prompt you for a password
Then we create a resource pool for our development department to use:
pveum pool add dev-pool --comment "IT development pool"
Finally, we can assign permissions to that pool:
pveum acl modify /pool/dev-pool/ -group developers -role PVEAdmin
Our software developers can now administer the resources assigned to that pool.
COPYRIGHT AND DISCLAIMER
Copyright © 2007-2022 Proxmox Server Solutions GmbH
This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License along with this program. If not, see https://www.gnu.org/licenses/
AUTHOR
Proxmox Server Solutions Gmbh
www.proxmox.com
NOTES
- 1.
- ldap.com
- 2.
- RFC2253
- 3.
- Time-based One-Time Password
- 4.
- Web Authentication
- 5.
- YubiKey OTP
- 6.
- YubiCloud
- 7.
- host your own verification server
- 8.
- FreeOTP
- 9.
- Let’s Encrypt
- 10.
- AppId https://developers.yubico.com/U2F/App_ID.html
- 11.
- Multi-facet apps: https://developers.yubico.com/U2F/App_ID.html
| Fri May 8 13:30:13 UTC 2026 | 7.4.2 |
