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Role Based Access Control — StackStorm 3.8.0 documentation

StackStorm Role Based Access Controlï

Note

Prior to StackStorm 3.3, Extreme Networks provided a commercial version of the StackStorm automation platform which included Role Based Access Control (RBAC). As these enterprise features were donated to the Linux Foundation, RBAC is now available in StackStorm Open Source since 3.4.

Role Based Access Control (RBAC) allows system administrators to restrict usersâ access and limit the operations they can perform. For instance, you could give your database operator access only to the database-related actions.

Read through the detailed overview below, or jump straight to a usage example. The source code for the RBAC module can be accessed at https://github.com/stackstorm/st2-rbac-backend.

Terminologyï

This section describes basic concepts with which you need to familiarize yourself, in order to understand and efficiently utilize RBAC.

Userï

A user represents an entity (person/system) which needs to be authenticated and interacts with StackStorm through the API.

User permissions are represented as a union of permission grants which are assigned to all the user roles.

By default when a new StackStorm user is created, this user has no roles assigned to it, meaning it doesnât have access to perform any API operation which is behind the RBAC wall.

Note

sensor_service is the StackStorm user which sensors run as.

Roleï

A role contains a set of permissions (permission grants) which apply to the resources. Permission grants are usually grouped together in a role using specific criteria (e.g. by project, location, team, responsibility, etc.).

Roles are assigned to the users. Each user can have multiple roles assigned to it and each role can be assigned to multiple users.

System Rolesï

System roles are roles which are available by default and canât be manipulated (modified and/or deleted).

Currently, the following system roles are available:

Role

Value

Description

Administrator

admin

All permissions on all the resources

System Administrator

system_admin

Same as admin, but this role is assigned to the first user in the system and canât be revoked

Observer

observer

view permission on all the resources

Permission Grantï

Permission grant grants a particular permission (permission type) to a particular resource. For example, you could grant an execute/run permission (action_execute) to an action core.local.

In general, there are five permission types available for each supported resource type:

view - Ability to view a specific resource or ability to list all the resources of a specific type.
create - Ability to create a new resource.
modify - Ability to modify (update) an existing resource.
delete - Ability to delete a specific resource.
all - Ability to perform all the supported operations on a specific resource. For example, if you grant action_all on a particular action this implies the following permissions: action_view, action_create, action_modify, action_delete and action_execute.

In addition to that, there is also a special execute (action_execute) permission type available for actions. This permission allows users to execute (run) a particular action.

Keep in mind that in StackStorm a workflow is just an action so if you want someone to be able to execute a particular workflow, you simply need to grant them action_execute permission on that workflow.

As described in the table below, create, modify, delete and execute permissions also implicitly grant corresponding view permission. This means that, for example, if you grant action_execute permission on a particular action, the user will also be able to view and retrieve details for this particular action.

Available Permission Typesï

The table below contains a list of all the available permission types.

Globalï

Permission name

Description

pack_install

Ability to install packs.

pack_uninstall

Ability to uninstall packs.

pack_create

Ability to create a new pack.

pack_register

Ability to register packs and corresponding resources.

pack_config

Ability to configure a pack.

pack_search

Ability to query registry and search packs.

pack_views_index_health

Ability to query health of pack registries.

action_alias_match

Ability to use action alias match API endpoint.

action_alias_help

Ability to use action alias help API endpoint.

api_key_create

Ability to create a new API Key.

policy_create

Ability to create a new policy.

execution_views_filters_list

Ability view all the distinct execution filters.

stream_view

Ability to view / listen to the events on the stream API endpoint.

inquiry_list

Ability to list existing Inquiries

inquiry_respond

Ability to respond to an existing Inquiry (in general - user still needs access per specific inquiry parameters). Also implies âinquiry_viewâ permission.

inquiry_view

Ability to view an existing Inquiry. Also implies âinquiry_respondâ permission.

runner_type_list

Ability to list (view all) runners.

pack_list

Ability to list (view all) packs.

sensor_type_list

Ability to list (view all) sensors.

action_list

Ability to list (view all) actions.

action_alias_list

Ability to list (view all) action aliases.

rule_list

Ability to list (view all) rules.

rule_enforcement_list

Ability to list (view all) rule enforcements.

execution_list

Ability to list (view all) executions.

execution_views_filters_list

Ability view all the distinct execution filters.

key_value_pair_list

Ability to list (view all) Key-Value Pairs.

webhook_list

Ability to list (view all) webhooks.

timer_list

Ability to list (view all) timers.

api_key_list

Ability to list (view all) API keys.

trace_list

Ability to list (view all) traces.

trigger_list

Ability to list (view all) triggers.

policy_type_list

Ability to list (view all) policy types.

policy_list

Ability to list (view all) policies.

inquiry_list

Ability to list existing Inquiries

Packï

Permission name

Description

pack_list

Ability to list (view all) packs.

pack_view

Ability to view a pack.

pack_create

Ability to create a new pack.

pack_modify

Ability to modify (update) an existing pack.

pack_delete

Ability to delete an existing pack.

pack_install

Ability to install packs.

pack_uninstall

Ability to uninstall packs.

pack_register

Ability to register packs and corresponding resources.

pack_config

Ability to configure a pack.

pack_search

Ability to query registry and search packs.

pack_views_index_health

Ability to query health of pack registries.

pack_all

Ability to perform all the supported operations on a particular pack.

sensor_type_view

Ability to view a sensor

sensor_type_modify

Ability to modify (update) an existing sensor. Also implies âsensor_type_viewâ permission.

sensor_type_all

Ability to perform all the supported operations on a particular sensor.

action_view

Ability to view an action.

action_create

Ability to create a new action. Also implies âaction_viewâ permission.

action_modify

Ability to modify (update) an existing action. Also implies âaction_viewâ permission.

action_delete

Ability to delete an existing action. Also implies âaction_viewâ permission.

action_execute

Ability to execute (run) an action. Also implies âaction_viewâ permission.

action_all

Ability to perform all the supported operations on a particular action.

action_alias_view

Ability to view an action alias.

action_alias_create

Ability to create a new action alias. Also implies âaction_alias_viewâ permission.

action_alias_modify

Ability to modify (update) an existing action alias. Also implies âaction_alias_viewâ permission.

action_alias_delete

Ability to delete an existing action alias. Also implies âaction_alias_viewâ permission.

action_alias_all

Ability to perform all the supported operations on a particular action alias.

rule_view

Ability to view a rule.

rule_create

Ability to create a new rule. Also implies ârule_viewâ permission

rule_modify

Ability to modify (update) an existing rule. Also implies ârule_viewâ permission.

rule_delete

Ability to delete an existing rule. Also implies ârule_viewâ permission.

rule_all

Ability to perform all the supported operations on a particular rule.

Sensor Typeï

Permission name

Description

sensor_type_list

Ability to list (view all) sensors.

sensor_type_view

Ability to view a sensor

sensor_type_modify

Ability to modify (update) an existing sensor. Also implies âsensor_type_viewâ permission.

sensor_type_all

Ability to perform all the supported operations on a particular sensor.

Actionï

Permission name

Description

action_list

Ability to list (view all) actions.

action_view

Ability to view an action.

action_create

Ability to create a new action. Also implies âaction_viewâ permission.

action_modify

Ability to modify (update) an existing action. Also implies âaction_viewâ permission.

action_delete

Ability to delete an existing action. Also implies âaction_viewâ permission.

action_execute

Ability to execute (run) an action. Also implies âaction_viewâ permission.

action_all

Ability to perform all the supported operations on a particular action.

Action Aliasï

Permission name

Description

action_alias_list

Ability to list (view all) action aliases.

action_alias_view

Ability to view an action alias.

action_alias_create

Ability to create a new action alias. Also implies âaction_alias_viewâ permission.

action_alias_modify

Ability to modify (update) an existing action alias. Also implies âaction_alias_viewâ permission.

action_alias_match

Ability to use action alias match API endpoint.

action_alias_help

Ability to use action alias help API endpoint.

action_alias_delete

Ability to delete an existing action alias. Also implies âaction_alias_viewâ permission.

action_alias_all

Ability to perform all the supported operations on a particular action alias.

Api Keyï

Permission name

Description

api_key_list

Ability to list (view all) API keys.

api_key_view

Ability to view an API Key.

api_key_create

Ability to create a new API Key.

api_key_modify

Ability to modify (update) an existing API key. Also implies âapi_key_viewâ permission.

api_key_delete

Ability to delete an existing API Keys.

api_key_all

Ability to perform all the supported operations on an API Key.

Key Value Pairï

Permission name

Description

key_value_pair_list

Ability to list (view all) Key-Value Pairs.

key_value_pair_view

Ability to view Key-Value Pairs.

key_value_pair_set

Ability to set a Key-Value Pair.

key_value_pair_delete

Ability to delete an existing Key-Value Pair.

key_value_pair_all

Ability to perform all the supported operations on a Key-Value Pair.

Ruleï

Permission name

Description

rule_list

Ability to list (view all) rules.

rule_view

Ability to view a rule.

rule_create

Ability to create a new rule. Also implies ârule_viewâ permission

rule_modify

Ability to modify (update) an existing rule. Also implies ârule_viewâ permission.

rule_delete

Ability to delete an existing rule. Also implies ârule_viewâ permission.

rule_all

Ability to perform all the supported operations on a particular rule.

Runner Typeï

Permission name

Description

runner_type_list

Ability to list (view all) runners.

runner_type_view

Ability to view a runner.

runner_type_modify

Ability to modify (update) an existing runner. Also implies ârunner_type_viewâ permission.

runner_type_all

Ability to perform all the supported operations on a particular runner.

Executionï

Permission name

Description

execution_list

Ability to list (view all) executions.

execution_view

Ability to view an execution.

execution_rerun

Ability to create a new action.

execution_stop

Ability to stop (cancel) a running execution.

execution_all

Ability to perform all the supported operations on a particular execution.

execution_views_filters_list

Ability view all the distinct execution filters.

Triggerï

Permission name

Description

trigger_list

Ability to list (view all) triggers.

trigger_view

Ability to view a trigger.

trigger_all

Ability to perform all the supported operations on triggers.

Webhookï

Permission name

Description

webhook_list

Ability to list (view all) webhooks.

webhook_view

Ability to view a webhook.

webhook_create

Ability to create a new webhook.

webhook_send

Ability to send / POST data to an existing webhook.

webhook_delete

Ability to delete an existing webhook.

webhook_all

Ability to perform all the supported operations on a particular webhook.

Traceï

Permission name

Description

trace_list

Ability to list (view all) traces.

trace_view

Ability to view a trace.

trace_all

Ability to perform all the supported operations on traces.

This list can also be retrieved using the RBAC meta API (GET /v1.0/rbac/permission_types).

User Permissionsï

User permissions (also called effective user permission set) are represented as a union of all the permission grants which are assigned to the user roles.

For example, if a user has the following two roles assigned to it:

---
    name: "role_five"
    description: "Role which grants execute permission to my_action_1"
    permission_grants:
        -
            resource_uid: "action:dummy_pack_1:my_action_1"
            permission_types:
               - "action_execute"

---
    name: "role_six"
    description: "Role which grants execute permission to my_action_2"
    permission_grants:
        -
            resource_uid: "action:dummy_pack_1:my_action_2"
            permission_types:
               - "action_execute"

The effective user permission set is:

action_execute on action:dummy_pack_1:my_action_1
action_execute on action:dummy_pack_1:my_action_2

RBAC system uses a whitelist approach which means there is no possibility of conflicting and contradictory permission grants in different roles (e.g. one role granting a particular permission and another role revoking it).

Resourceï

In the context of RBAC, a resource refers to the resource to which the permission grant applies to. Permission grants can be applied to the following resource types:

packs
sensors
actions
action aliases
rules
executions
webhooks
inquiries
key value pairs

Note

The support of key value pairs is only available in StackStorm v3.7.0 and above.

A resource is identified by a uid, and referenced as such in permission grants. UID is an identifier which is unique for each resource in the StackStorm installation. UIDs follow this format: <resource type>:<resource specific identifier value> (e.g. pack:libcloud, action:libcloud:list_vms, key_value_pair:st2kv.system:key1, key_value_pair:st2kv.user:key2 etc.).

You can retrieve the UID of a particular resource by listing all the resources of a particular type or by retrieving details of a single resource using either API or CLI.

For example:

st2 action list
+-------------------------+-------------------------+-----------+-------------------------+-------------------------+
| uid                     | ref                     | pack      | name                    | description             |
+-------------------------+-------------------------+-----------+-------------------------+-------------------------+
| action:core:remote      | core.remote             | core      | remote                  | Action to execute       |
|                         |                         |           |                         | arbitrary linux command |
|                         |                         |           |                         | remotely.               |
+-------------------------+-------------------------+-----------+-------------------------+-------------------------+

How it Worksï

User permissions are checked when a user performs an operation using the API. If the user has the necessary permissions the API operation proceeds normally, otherwise an access denied error is returned and the error is logged in the audit log.

Permission Inheritanceï

Pack resources

Pack resources inherit all the permissions from a pack. This means that if you grant action_execute permission to a pack, the user will be able to execute all the actions inside that pack. Similarly, if you grant rule_create permission to a pack, the user will be able to create new rules in that pack.

Executions

Executions inherit permissions from the action they belong to and from the actionâs parent pack. This means that if you grant action_view permission on a particular action, the user will be able to view all the executions which belong to that action. Similarly, if you grant action_view to the parent pack which the action execution belongs to, the user will be able to view all the executions which belong to the action with that parent pack.

On top of that, granting action_execute on a particular pack or action also grants execution_rerun and execution_stop to all the executions which belong to that action.

Rule enforcements

Rule enforcements (models that represent when a rule evaluated actually resulted in an action) inherit permissions from the rule they belong to and from the ruleâs parent pack. This means, if a user has a rule_view permission on a particular rule, then they also have permissions to view the rule enforcement model for the rule. Similarly, if you grant rule_view to the parent pack of the rule, users will be able to see all enforcements of rules belonging to that pack.

Note that rule enforcements are operational models. You cannot create/modify/delete them via API. So permissions other than view and list do not make sense.

Inquiries

Inquiries inherit response permissions based on execution permissions of the workflow that generated them. This is useful for ensuring that anyone that has rights to execute a workflow that generates an Inquiry is also automatically granted permissions to respond to that Inquiry.

Specifically, granting action_execute on a workflow action, or its parent pack, also grants inquiry_respond permissions for any Inquiries generated from that Workflow.

For detailed examples, see Securing Inquiries.

Permissions and Executions Which Are Not Triggered via the APIï

Normally when an execution is triggered via the API (POST to /actionexecutions/), the authenticated StackStorm user who triggered the execution is the effective user for RBAC purposes. There are some exceptions, described below:

Rules - Effective user for executions which are triggered by a rule is the system user (by default, stanley).

ChatOps - Effective user for executions which are triggered via ChatOps (POST to /aliasexecutions/) using hubot is the StackStorm user that is configured in hubot (ST2_AUTH_USERNAME - by default that is chatops_bot).

Enabling RBACï

To configure RBAC you will need to manually enable it in st2.conf and assign admin privileges to default user stanley.

To enable rbac, add this section to /etc/st2/st2.conf:

[rbac]
enable = True
backend = default

Run sudo st2ctl restart-component st2api to apply that change.

To assign admin privileges to stanley and st2admin, create these two files:

/opt/stackstorm/rbac/assignments/stanley.yaml:

---
username: "stanley"
roles:
  - "admin"

/opt/stackstorm/rbac/assignments/st2admin.yaml:

---
username: "st2admin"
roles:
  - "admin"

Run sudo st2-apply-rbac-definitions --config-file /etc/st2/st2.conf to apply those changes.

Defining Roles and Assignmentsï

To follow the infrastructure as code approach, roles and user role assignments are defined in YAML files which are stored in /opt/stackstorm/rbac/.

Those definitions are simple YAML files means you can (and should) version control and manage them in the same way you version control and manage other source code and infrastructure artifacts.

Both roles and user role assignments are loaded in lexicographical order based on the filename. For example, if you have two role definitions in the files named role_b.yaml and role_a.yaml, role_a.yaml will be loaded before role_b.yaml.

Defining Roles and Permission Grantsï

Roles and permission grants are defined in YAML files which are stored in /opt/stackstorm/rbac/roles/. Each file defines role information and associated permission grants for a single role which means that if you want to define n roles you will need n files.

Example role definition (/opt/stackstorm/rbac/roles/role_sample.yaml):

---
    name: "sample"
    description: "Role which contains many different permission grants and serves for demonstration purposes"
    enabled: false
    permission_grants:
        -
            # Here we grant "pack_all" to "dummy_pack_1" pack which means user can perform all the
            # operations on this pack.
            resource_uid: "pack:dummy_pack_1"
            permission_types:
               - "pack_all"
        -
            # Here we grant "action_view" and "rule_view" to "dummy_pack_1" pack which means user
            # can view (list) all the actions and rules inside this pack.
            resource_uid: "pack:dummy_pack_1"
            permission_types:
               - "action_view"
               - "rule_view"
        -
            # Here we grant "rule_create" to "dummy_pack_1" pack which means user can create new
            # rules inside this pack.
            # Note: To be able to create a rule user also needs to have an "action_execute" permission
            # on the action used inside the rule. In case the rule trigger type is a webhook, user also
            # needs to have "webhook_create" permission on the corresponding webhook.
            resource_uid: "pack:dummy_pack_1"
            permission_types:
               - "rule_create"
        -
            # Here we grant "webhook_create" which allows user to create a webhook with a name of
            # "my_sample_webhook".
            # Keep in mind that webhooks have no parent resource so the permission grant is
            # directly on the webhook you want to allow a user to create.
            resource_uid: "webhook:my_sample_webhook"
            permission_types:
               - "webhook_create"
        -
            # Here we grant "action_execute" to "dummy_pack_2" which means user can execute (run)
            # all the actions inside this pack. Execute permission also grants "execution_re_run"
            # and "execution_stop" which means user can also re-run and stop (cancel) all the
            # executions which are triggered for the actions which belong to this pack.
            resource_uid: "pack:dummy_pack_2"
            permission_types:
               - "action_execute"
        -
            # Here we grant "action_all" to action "my_action_1" inside "dummy_pack_2" which means
            # user can perform all the operations (view, modify, execute and delete) on the
            # specified action.
            resource_uid: "action:dummy_pack_2:my_action_1"
            permission_types:
               - "action_all"
        -
            # Here we grant "action_execute" to action "my_action_2" inside "dummy_pack_2" allowing
            # user to execute (run) this particular action.
            resource_uid: "action:dummy_pack_2:my_action_2"
            permission_types:
               - "action_execute"
        -
            # Here we grant "rule_view" and "rule_modify" to rule "my_rule_1" inside "dummy_pack_2" allowing
            # user to view and modify (but not delete) this particular rule.
            resource_uid: "rule:dummy_pack_2:my_rule_1"
            permission_types:
               - "rule_view"
               - "rule_modify"
        -
            # Here we grant "webhook_send" to a webhook named "st2" (that's a generic webhook which exists
            # by default in every installation) allowing user to POST triggers to this particular webhook.
            # Keep in mind that the user needs to have "webhook_create" permissions on a particular webhook
            # if you want to allow user to create / register a new webhook via rule.
            resource_uid: "webhook:st2"
            permission_types:
               - "webhook_send"
        -
            # Here we grant "action_list" and "rule_list" allowing user to view / list all the actions and
            # rules
            permission_types:
               - "action_list"
               - "rule_list"

The example above contains a variety of permission grants with corresponding explanations (comments).

Defining User Role Assignmentsï

User role assignments are defined in YAML files which are located in /opt/stackstorm/rbac/assignments/. Each file defines assignments for a single user which means that if you want to define assignments for n users, you will need n files.

Example role definition (/opt/stackstorm/rbac/assignments/user4.yaml):

---
    username: "user4"
    roles:
        - "role_one"
        - "observer"

In the example above we assign two roles to the user named user4:

role_one (a custom role which needs to be defined as described above) and
observer (system role).

Key Value Pairsï

Note

This functionality is only available in StackStorm v3.7.0 and above.

Users with admin and system_admin roles have all access to system scoped KVPs. In v3.6.0 and before, users with admin role have full access to other usersâ KVPs. This behavior is unchanged.

By default, a user has access to his/her own user scoped KVPs without requiring specific permission grants. A non-admin user by default cannot access system scoped KVPs or other usersâ KVPs. A non-admin user can be explicitly granted permission to one or more system scoped KVPs similar to how access to other resources are granted to users. Currently, there is no option or plan to grant non-admin user access to another userâs set of KVPs.

The following is an example to assign a system scoped KVP to a role. Create /opt/stackstorm/rbac/roles/key1_write_role.yaml with the following content. Assign this role to a user and then apply the RBAC definitions.

---
name: key1_write_role
description: Role that allow users to set system key1
enabled: true
permission_grants:
    - resource_uid: "key_value_pair:st2kv.system:key1"
      permission_types:
        - "key_value_pair_set"

Applying RBAC Definitionsï

As described above, RBAC definitions are defined in YAML files located in the /opt/stackstorm/rbac/ directory. For those definitions to take effect, you need to apply them using the st2-apply-rbac-definitions script.

Usually, you will want to run this script every time you modify the RBAC definitions.

For example:

st2-apply-rbac-definitions --config-file=/etc/st2/st2.conf

2015-08-12 22:30:18,439 - INFO - Synchronizing roles...
2015-08-12 22:30:18,441 - DEBUG - New roles: set([])
2015-08-12 22:30:18,442 - DEBUG - Updated roles: set(['role_two', 'role_one', 'role_three'])
2015-08-12 22:30:18,442 - DEBUG - Removed roles: set([])
2015-08-12 22:30:18,443 - DEBUG - Deleting 3 stale roles
2015-08-12 22:30:18,444 - DEBUG - Deleted 3 stale roles
2015-08-12 22:30:18,446 - DEBUG - Deleting 5 stale permission grants
2015-08-12 22:30:18,447 - DEBUG - Deleted 5 stale permission grants
2015-08-12 22:30:18,448 - DEBUG - Creating 3 new roles
2015-08-12 22:30:18,454 - DEBUG - Created 3 new roles
2015-08-12 22:30:18,458 - INFO - Synchronizing users role assignments...
2015-08-12 22:30:18,460 - DEBUG - New assignments for user "user1": set([])
2015-08-12 22:30:18,461 - DEBUG - Updated assignments for user "user1": set(['role_two', 'role_one'])
2015-08-12 22:30:18,461 - DEBUG - Removed assignments for user "user1": set([])
2015-08-12 22:30:18,462 - DEBUG - Removed 2 assignments for user "user1"
2015-08-12 22:30:18,464 - DEBUG - Created 2 new assignments for user "user1"

Automatically Granting Roles Based on LDAP Group Membershipï

Note

This functionality is only available in StackStorm v2.3.0 and above, with the LDAP auth backend used for authentication.

In addition to manually assigning roles to the users based on the definitions in the /opt/stackstorm/rbac/assignments/ directory, StackStorm also supports automatically granting roles to users upon authentication, based on LDAP groups membership.

This comes handy in enterprise environments and makes StackStorm user provisioning easier and faster. It means administrators donât need to manually write and manage RBAC role assignment files on disk, because roles are automatically granted to the users based on their LDAP group membership and mappings files in /opt/stackstorm/rbac/mappings/ directory.

To be able to utilize this feature it first needs to be enabled in st2.conf by setting rbac.sync_remote_groups option to True.

[rbac]
sync_remote_groups = True

After this feature is enabled, the StackStorm administrator needs to write mapping files that tell StackStorm which roles to automatically grant to users, based upon LDAP group membership.

Mapping files are located in the /opt/stackstorm/rbac/mappings/ directory and map an LDAP group to one or more StackStorm roles.

Two examples of such mapping files can be found below:

Note

LDAP group names referenced in the group attribute are case-sensitive.

/opt/stackstorm/rbac/mappings/stormers.yaml
```
---
  group: "CN=stormers,OU=groups,DC=stackstorm,DC=net"
  description: "Automatically grant admin role to all stormers group members."
  roles:
    - "admin"
```
Each user who is a member of the CN=stormers,OU=groups,DC=stackstorm,DC=net LDAP group will automatically be granted admin StackStorm role when they successfully authenticate with StackStorm.
/opt/stackstorm/rbac/mappings/testers.yaml
```
---
  group: "CN=testers,OU=groups,DC=stackstorm,DC=net"
  description: "Automatically grant observer and qa_admin role to all testers group members."
  roles:
    - "observer"
    - "qa_admin"
```
Each user who is a member of the CN=testers,OU=groups,DC=stackstorm,DC=net LDAP group will automatically be granted observer and qa_admin StackStorm roles when they successfully authenticate with StackStorm.

Once the mapping definitions files are written, the StackStorm administrator needs to run the st2-apply-rbac-definitions tool to store those definitions in the database. This tool also needs to be run after any change or removal of mappings files.

How LDAP Group-Based Role Assignments Workï

Role assignments based on the LDAP group to StackStorm role mappings are synchronized each time a user authenticates with the StackStorm auth API and receives a fresh auth token.

If for some reason you want user roles to be synchronized before the existing auth token expires (default TTL is 24 hours), you can simply ask the user to re-authenticate to retrieve a new auth token. Alternatively, administrators can manually expire or disable an active auth token which will force the user to re-authenticate.

A similar workflow can be used when removing a user from your system. By default, when a user is removed from LDAP they will still be able to use StackStorm if they have a valid auth token, until that auth token expires. If you want user access to be revoked as soon as they are removed from LDAP, you can manually purge active auth tokens for a particular user from the user database.

Restricting Users to Only View Resources They Own or Createdï

Note

This functionality is disabled by default and is only available in StackStorm v2.7.0 and above.

To enable it, you need to set the rbac.permission_isolation config option in /etc/st2/st2.conf to True and restart the API service (sudo st2ctl restart-component st2api).

Currently it is only supported by the /v1/executions and /v1/rules API endpoints.

By default, a user needs RESOURCE_LIST (e.g. EXECUTION_LIST) permission type to be able to use âget allâ API endpoints and view all the resources of a specific type.

The same applies to viewing a single resource (using âget oneâ API endpoint) - the user needs RESOURCE_VIEW (e.g. RULE_VIEW) permission on a specific resource (or on a parent pack).

When this feature is enabled, non-admin users can only view resources which belong to or are owned by them (resource context.user matches the currently authenticated user) when using âget allâ and âget oneâ API endpoints (that is in addition to needing RESOURCE_LIST/RESOURCE_VIEW permission).

Examples with this feature enabled:

1. Admin user (can view all the resources)ï

Authenticated as a user with admin role.

curl "https://localhost/api/v1/rules"

[
    {
        "name": "rule1",
        "ref": "examples.rule1",
        ...
        "context": {
            "user": "admin"
        },
    },
    {
        "name": "rule2",
        "ref": "examples.rule2",
        ...
        "context": {
            "user": "user2"
        },
    },
    {
        "name": "rule3",
        "ref": "examples.rule3",
        ...
        "context": {
            "user": "user2"
        },
    },
    {
        "name": "rule4",
        "ref": "examples.rule4",
        ...
        "context": {
            "user": "user3"
        },
    },
    {
        "name": "rule5",
        "ref": "examples.rule5",
        ...
        "context": {
            "user": "user3"
        },
    }
]

2. User âuser2â can only view their own resourcesï

Authenticated as âuser2â.

curl "https://localhost/api/v1/rules"

[
    {
        "name": "rule2",
        "ref": "examples.rule2",
        ...
        "context": {
            "user": "user2"
        },
    },
    {
        "name": "rule3",
        "ref": "examples.rule3",
        ...
        "context": {
            "user": "user2"
        },
    }
]

3. User âuser3â can only view their own resourcesï

Authenticated as âuser3â.

curl "https://localhost/api/v1/rules"

[
    {
        "name": "rule4",
        "ref": "examples.rule4",
        ...
        "context": {
            "user": "user3"
        },
    },
    {
        "name": "rule5",
        "ref": "examples.rule5",
        ...
        "context": {
            "user": "user3"
        },
    }
]

Using RBAC Exampleï

Possible scenarios:

A user owns a pack i.e is able to view, create, delete, modify and where applicable execute various resources like actions, rules, sensors.
A user can create rules, execute actions and view a handful of actions.
A user is capable of viewing actions in a pack but cannot execute any action.

This example provides a walk-through of scenario 1 i.e configuring a user as a pack owner. The steps to be followed are by a StackStorm Administrator, on a system running StackStorm.

User Creationï

All user and password management is kept outside of StackStorm. Read the authentication docs to see how to configure to configure StackStorm with various identity providers.

For sake of this example let us assume that the identity provider is managed by the OS on which StackStorm runs.

On most Linux systems, to create a user and set their password, run this:

$ useradd rbac_user1
$ passwd rbac_user1

Once this user is created StackStorm will allow access to this user. (Optional) To validate, try:

$ st2 login rbac_user1 -p '<RBACU1_PASSWORD>'
$ st2 action list

Role Creationï

A newly created user has no assigned permissions. Each permission must be explicitly assigned to a user. To assign permission grants requires creation of a role and then associating this role with a user. In this case we are trying to create a pack owner role.

Lets first make sure there is a pack example we can use to experiment.

$ cd /opt/stackstorm/packs/
$ mkdir example
$ mkdir example/actions example/rules example/sensors
$ touch example/pack.yaml
$ touch /opt/stackstorm/configs/example.yaml
$ touch example/requirements.txt
$ cp core/icon.png example/icon.png

Now we setup a role. Create /opt/stackstorm/rbac/roles/example_pack_owner.yaml with the following content:

---
name: "example_pack_owner"
description: "Owner of pack example"
enabled: true
permission_grants:
    -
        resource_uid: "pack:example"
        permission_types:
           - "pack_all"
           - "sensor_type_all"
           - "rule_all"
           - "action_all"
    # Note: To be able to create a rule, the user also needs to have an "action_execute" permission
    # on the action used inside the rule. In this example, the rule created calls core.local action
    -
        resource_uid: "action:core:local"
        permission_types:
           - "action_execute"
    # Need runner_type_list on relevant runners
    -
        resource_uid: "runner_type:local-shell-cmd"
        permission_types:
           - "runner_type_list"

A pack owner role would require the user to be able to view, create, modify and delete all contents of a pack. Again, letâs pick the pack example as the target of ownership.

See available permission types for a full list of permission types.

Role Assignmentï

Creation of a role is followed by assignment of a role to the user. Create the file /opt/stackstorm/rbac/assignments/rbac_user1.yaml with the following content:

---
username: "rbac_user1"
description: "Grant example_pack_owner role to rbac_user1 user."
enabled: true
roles:
    - "example_pack_owner"

Applying RBACï

As a StackStorm administrator, run:

st2-apply-rbac-definitions --config-file=/etc/st2/st2.conf

This command will sync the StackStorm RBAC state with the filesystem state. Only after running this command does StackStorm know of the latest changes to RBAC permission grants.

Validationï

Lets take this for a spin using the StackStorm CLI.

Setup Authentication token:

$ st2 login rbac_user1 -p '<RBACU1_PASSWORD>'

Validate rule visibility and creation:

$ cd /opt/stackstorm/packs/example
$ cp /usr/share/doc/st2/examples/rules/sample_rule_with_timer.yaml rules/
$ sed -i 's/pack: "examples"/pack: "example"/g' rules/sample_rule_with_timer.yaml
$ st2 rule create rules/sample_rule_with_timer.yaml
$ st2 rule get example.sample_rule_with_timer
$ st2 rule delete example.sample_rule_with_timer

# Expect Failure
$ st2 rule get <EXISTING_RULE_REF>

Validation action visibility, creation and execute:

$ cd /opt/stackstorm/packs/example
$ cp /usr/share/doc/st2/examples/actions/local.yaml actions/
$ echo "pack: example" >> actions/local.yaml
$ st2 action create actions/local.yaml
$ st2 action get example.local-notify
$ st2 run example.local-notify hostname
$ st2 action delete example.local-notify

# Expect failure
$ st2 action get core.echo
$ st2 run core.echo hello

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