url: ldap://10.0.0.0:389 (1)
bindDN: cn=admin,dc=example,dc=com (2)
bindPassword: <password> (3)
insecure: false (4)
ca: my-ldap-ca-bundle.crt (5)
As an administrator, you can use groups to manage users, change their permissions, and enhance collaboration. Your organization may have already created user groups and stored them in an LDAP server. OpenShift Container Platform can sync those LDAP records with internal OpenShift Container Platform records, enabling you to manage your groups in one place. OpenShift Container Platform currently supports group sync with LDAP servers using three common schemas for defining group membership: RFC 2307, Active Directory, and augmented Active Directory.
For more information on configuring LDAP, see Configuring an LDAP identity provider.
You must have |
Before you can run LDAP sync, you need a sync configuration file. This file contains the following LDAP client configuration details:
Configuration for connecting to your LDAP server.
Sync configuration options that are dependent on the schema used in your LDAP server.
An administrator-defined list of name mappings that maps OpenShift Container Platform group names to groups in your LDAP server.
The format of the configuration file depends upon the schema you are using: RFC 2307, Active Directory, or augmented Active Directory.
The LDAP client configuration section of the configuration defines the connections to your LDAP server.
The LDAP client configuration section of the configuration defines the connections to your LDAP server.
url: ldap://10.0.0.0:389 (1)
bindDN: cn=admin,dc=example,dc=com (2)
bindPassword: <password> (3)
insecure: false (4)
ca: my-ldap-ca-bundle.crt (5)
1 | The connection protocol, IP address of the LDAP server hosting your
database, and the port to connect to, formatted as scheme://host:port . |
2 | Optional distinguished name (DN) to use as the Bind DN. OpenShift Container Platform uses this if elevated privilege is required to retrieve entries for the sync operation. |
3 | Optional password to use to bind. OpenShift Container Platform uses this if elevated privilege is necessary to retrieve entries for the sync operation. This value may also be provided in an environment variable, external file, or encrypted file. |
4 | When false , secure
LDAP (ldaps:// ) URLs connect using TLS, and insecure LDAP (ldap:// ) URLs are
upgraded to TLS. When true , no TLS connection is made to the server and you cannot use ldaps:// URL schemes. |
5 | The certificate bundle to use for validating server certificates for the
configured URL. If empty, OpenShift Container Platform uses system-trusted roots. This only applies
if insecure is set to false . |
Sync configurations consist of LDAP query definitions for the entries that are required for synchronization. The specific definition of an LDAP query depends on the schema used to store membership information in the LDAP server.
baseDN: ou=users,dc=example,dc=com (1)
scope: sub (2)
derefAliases: never (3)
timeout: 0 (4)
filter: (objectClass=person) (5)
pageSize: 0 (6)
1 | The distinguished name (DN) of the branch of the directory where all searches will start from. It is required that you specify the top of your directory tree, but you can also specify a subtree in the directory. |
2 | The scope of the search. Valid values are base , one , or sub . If this
is left undefined, then a scope of sub is assumed. Descriptions of the scope
options can be found in the table below. |
3 | The behavior of the search with respect to aliases in the LDAP tree. Valid
values are never , search , base , or always . If this is left undefined,
then the default is to always dereference aliases. Descriptions of the
dereferencing behaviors can be found in the table below. |
4 | The time limit allowed for the search by the client, in seconds. A value of
0 imposes no client-side limit. |
5 | A valid LDAP search filter. If this is left undefined, then the default is
(objectClass=*) . |
6 | The optional maximum size of response pages from the server, measured in LDAP
entries. If set to 0 , no size restrictions will be made on pages of responses.
Setting paging sizes is necessary when queries return more entries than the
client or server allow by default. |
LDAP search scope | Description |
---|---|
|
Only consider the object specified by the base DN given for the query. |
|
Consider all of the objects on the same level in the tree as the base DN for the query. |
|
Consider the entire subtree rooted at the base DN given for the query. |
Dereferencing behavior | Description |
---|---|
|
Never dereference any aliases found in the LDAP tree. |
|
Only dereference aliases found while searching. |
|
Only dereference aliases while finding the base object. |
|
Always dereference all aliases found in the LDAP tree. |
A user-defined name mapping explicitly maps the names of OpenShift Container Platform groups to unique identifiers that find groups on your LDAP server. The mapping uses normal YAML syntax. A user-defined mapping can contain an entry for every group in your LDAP server or only a subset of those groups. If there are groups on the LDAP server that do not have a user-defined name mapping, the default behavior during sync is to use the attribute specified as the OpenShift Container Platform group’s name.
groupUIDNameMapping:
"cn=group1,ou=groups,dc=example,dc=com": firstgroup
"cn=group2,ou=groups,dc=example,dc=com": secondgroup
"cn=group3,ou=groups,dc=example,dc=com": thirdgroup
The RFC 2307 schema requires you to provide an LDAP query definition for both user and group entries, as well as the attributes with which to represent them in the internal OpenShift Container Platform records.
For clarity, the group you create in OpenShift Container Platform should use attributes other than the distinguished name whenever possible for user- or administrator-facing fields. For example, identify the users of an OpenShift Container Platform group by their e-mail, and use the name of the group as the common name. The following configuration file creates these relationships:
If using user-defined name mappings, your configuration file will differ. |
rfc2307_config.yaml
kind: LDAPSyncConfig
apiVersion: v1
url: ldap://LDAP_SERVICE_IP:389 (1)
insecure: false (2)
rfc2307:
groupsQuery:
baseDN: "ou=groups,dc=example,dc=com"
scope: sub
derefAliases: never
pageSize: 0
groupUIDAttribute: dn (3)
groupNameAttributes: [ cn ] (4)
groupMembershipAttributes: [ member ] (5)
usersQuery:
baseDN: "ou=users,dc=example,dc=com"
scope: sub
derefAliases: never
pageSize: 0
userUIDAttribute: dn (6)
userNameAttributes: [ mail ] (7)
tolerateMemberNotFoundErrors: false
tolerateMemberOutOfScopeErrors: false
1 | The IP address and host of the LDAP server where this group’s record is stored. |
2 | When false , secure
LDAP (ldaps:// ) URLs connect using TLS, and insecure LDAP (ldap:// ) URLs are
upgraded to TLS. When true , no TLS connection is made to the server and you cannot use ldaps:// URL schemes. |
3 | The attribute that uniquely identifies a group on the LDAP server.
You cannot specify groupsQuery filters when using DN for groupUIDAttribute .
For fine-grained filtering, use the whitelist / blacklist method. |
4 | The attribute to use as the name of the group. |
5 | The attribute on the group that stores the membership information. |
6 | The attribute that uniquely identifies a user on the LDAP server. You
cannot specify usersQuery filters when using DN for userUIDAttribute. For
fine-grained filtering, use the whitelist / blacklist method. |
7 | The attribute to use as the name of the user in the OpenShift Container Platform group record. |
The Active Directory schema requires you to provide an LDAP query definition for user entries, as well as the attributes to represent them with in the internal OpenShift Container Platform group records.
For clarity, the group you create in OpenShift Container Platform should use attributes other than the distinguished name whenever possible for user- or administrator-facing fields. For example, identify the users of an OpenShift Container Platform group by their e-mail, but define the name of the group by the name of the group on the LDAP server. The following configuration file creates these relationships:
active_directory_config.yaml
kind: LDAPSyncConfig
apiVersion: v1
url: ldap://LDAP_SERVICE_IP:389
activeDirectory:
usersQuery:
baseDN: "ou=users,dc=example,dc=com"
scope: sub
derefAliases: never
filter: (objectclass=person)
pageSize: 0
userNameAttributes: [ mail ] (1)
groupMembershipAttributes: [ memberOf ] (2)
1 | The attribute to use as the name of the user in the OpenShift Container Platform group record. |
2 | The attribute on the user that stores the membership information. |
The augmented Active Directory schema requires you to provide an LDAP query definition for both user entries and group entries, as well as the attributes with which to represent them in the internal OpenShift Container Platform group records.
For clarity, the group you create in OpenShift Container Platform should use attributes other than the distinguished name whenever possible for user- or administrator-facing fields. For example, identify the users of an OpenShift Container Platform group by their e-mail, and use the name of the group as the common name. The following configuration file creates these relationships.
augmented_active_directory_config.yaml
kind: LDAPSyncConfig
apiVersion: v1
url: ldap://LDAP_SERVICE_IP:389
augmentedActiveDirectory:
groupsQuery:
baseDN: "ou=groups,dc=example,dc=com"
scope: sub
derefAliases: never
pageSize: 0
groupUIDAttribute: dn (1)
groupNameAttributes: [ cn ] (2)
usersQuery:
baseDN: "ou=users,dc=example,dc=com"
scope: sub
derefAliases: never
filter: (objectclass=person)
pageSize: 0
userNameAttributes: [ mail ] (3)
groupMembershipAttributes: [ memberOf ] (4)
1 | The attribute that uniquely identifies a group on the LDAP server. You
cannot specify groupsQuery filters when using DN for groupUIDAttribute. For
fine-grained filtering, use the whitelist / blacklist method. |
2 | The attribute to use as the name of the group. |
3 | The attribute to use as the name of the user in the OpenShift Container Platform group record. |
4 | The attribute on the user that stores the membership information. |
Once you have created a sync configuration file, you can begin to sync. OpenShift Container Platform allows administrators to perform a number of different sync types with the same server.
You can sync all groups from the LDAP server with OpenShift Container Platform.
Create a sync configuration file.
You have access to the cluster as a user with the cluster-admin
role.
To sync all groups from the LDAP server with OpenShift Container Platform:
$ oc adm groups sync --sync-config=config.yaml --confirm
By default, all group synchronization operations are dry-run, so you
must set the |
You can sync all groups already in OpenShift Container Platform that correspond to groups in the LDAP server specified in the configuration file.
Create a sync configuration file.
You have access to the cluster as a user with the cluster-admin
role.
To sync OpenShift Container Platform groups with the LDAP server:
$ oc adm groups sync --type=openshift --sync-config=config.yaml --confirm
By default, all group synchronization operations are dry-run, so you
must set the |
You can sync a subset of LDAP groups with OpenShift Container Platform using whitelist files, blacklist files, or both.
You can use any combination of blacklist files, whitelist files, or whitelist literals. Whitelist and blacklist files must contain one unique group identifier per line, and you can include whitelist literals directly in the command itself. These guidelines apply to groups found on LDAP servers as well as groups already present in OpenShift Container Platform. |
Create a sync configuration file.
You have access to the cluster as a user with the cluster-admin
role.
To sync a subset of LDAP groups with OpenShift Container Platform, use any the following commands:
$ oc adm groups sync --whitelist=<whitelist_file> \
--sync-config=config.yaml \
--confirm
$ oc adm groups sync --blacklist=<blacklist_file> \
--sync-config=config.yaml \
--confirm
$ oc adm groups sync <group_unique_identifier> \
--sync-config=config.yaml \
--confirm
$ oc adm groups sync <group_unique_identifier> \
--whitelist=<whitelist_file> \
--blacklist=<blacklist_file> \
--sync-config=config.yaml \
--confirm
$ oc adm groups sync --type=openshift \
--whitelist=<whitelist_file> \
--sync-config=config.yaml \
--confirm
By default, all group synchronization operations are dry-run, so you
must set the |
An administrator can also choose to remove groups from OpenShift Container Platform records if the records on the LDAP server that created them are no longer present. The prune job will accept the same sync configuration file and whitelists or blacklists as used for the sync job.
For example:
$ oc adm prune groups --sync-config=/path/to/ldap-sync-config.yaml --confirm
$ oc adm prune groups --whitelist=/path/to/whitelist.txt --sync-config=/path/to/ldap-sync-config.yaml --confirm
$ oc adm prune groups --blacklist=/path/to/blacklist.txt --sync-config=/path/to/ldap-sync-config.yaml --confirm
You can automatically sync LDAP groups on a periodic basis by configuring a cron job.
You have access to the cluster as a user with the cluster-admin
role.
You have configured an LDAP identity provider (IDP).
This procedure assumes that you created an LDAP secret named ldap-secret
and a config map named ca-config-map
.
Create a project where the cron job will run:
$ oc new-project ldap-sync (1)
1 | This procedure uses a project called ldap-sync . |
Locate the secret and config map that you created when configuring the LDAP identity provider and copy them to this new project.
The secret and config map exist in the openshift-config
project and must be copied to the new ldap-sync
project.
Define a service account:
ldap-sync-service-account.yaml
kind: ServiceAccount
apiVersion: v1
metadata:
name: ldap-group-syncer
namespace: ldap-sync
Create the service account:
$ oc create -f ldap-sync-service-account.yaml
Define a cluster role:
ldap-sync-cluster-role.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: ldap-group-syncer
rules:
- apiGroups:
- ''
- user.openshift.io
resources:
- groups
verbs:
- get
- list
- create
- update
Create the cluster role:
$ oc create -f ldap-sync-cluster-role.yaml
Define a cluster role binding to bind the cluster role to the service account:
ldap-sync-cluster-role-binding.yaml
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: ldap-group-syncer
subjects:
- kind: ServiceAccount
name: ldap-group-syncer (1)
namespace: ldap-sync
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: ldap-group-syncer (2)
1 | Reference to the service account created earlier in this procedure. |
2 | Reference to the cluster role created earlier in this procedure. |
Create the cluster role binding:
$ oc create -f ldap-sync-cluster-role-binding.yaml
Define a config map that specifies the sync configuration file:
ldap-sync-config-map.yaml
kind: ConfigMap
apiVersion: v1
metadata:
name: ldap-group-syncer
namespace: ldap-sync
data:
sync.yaml: | (1)
kind: LDAPSyncConfig
apiVersion: v1
url: ldaps://10.0.0.0:389 (2)
insecure: false
bindDN: cn=admin,dc=example,dc=com (3)
bindPassword:
file: "/etc/secrets/bindPassword"
ca: /etc/ldap-ca/ca.crt
rfc2307: (4)
groupsQuery:
baseDN: "ou=groups,dc=example,dc=com" (5)
scope: sub
filter: "(objectClass=groupOfMembers)"
derefAliases: never
pageSize: 0
groupUIDAttribute: dn
groupNameAttributes: [ cn ]
groupMembershipAttributes: [ member ]
usersQuery:
baseDN: "ou=users,dc=example,dc=com" (6)
scope: sub
derefAliases: never
pageSize: 0
userUIDAttribute: dn
userNameAttributes: [ uid ]
tolerateMemberNotFoundErrors: false
tolerateMemberOutOfScopeErrors: false
1 | Define the sync configuration file. |
2 | Specify the URL. |
3 | Specify the bindDN . |
4 | This example uses the RFC2307 schema; adjust values as necessary. You can also use a different schema. |
5 | Specify the baseDN for groupsQuery . |
6 | Specify the baseDN for usersQuery . |
Create the config map:
$ oc create -f ldap-sync-config-map.yaml
Define a cron job:
ldap-sync-cron-job.yaml
kind: CronJob
apiVersion: batch/v1
metadata:
name: ldap-group-syncer
namespace: ldap-sync
spec: (1)
schedule: "*/30 * * * *" (2)
concurrencyPolicy: Forbid
jobTemplate:
spec:
backoffLimit: 0
ttlSecondsAfterFinished: 1800 (3)
template:
spec:
containers:
- name: ldap-group-sync
image: "registry.redhat.io/openshift4/ose-cli:latest"
command:
- "/bin/bash"
- "-c"
- "oc adm groups sync --sync-config=/etc/config/sync.yaml --confirm" (4)
volumeMounts:
- mountPath: "/etc/config"
name: "ldap-sync-volume"
- mountPath: "/etc/secrets"
name: "ldap-bind-password"
- mountPath: "/etc/ldap-ca"
name: "ldap-ca"
volumes:
- name: "ldap-sync-volume"
configMap:
name: "ldap-group-syncer"
- name: "ldap-bind-password"
secret:
secretName: "ldap-secret" (5)
- name: "ldap-ca"
configMap:
name: "ca-config-map" (6)
restartPolicy: "Never"
terminationGracePeriodSeconds: 30
activeDeadlineSeconds: 500
dnsPolicy: "ClusterFirst"
serviceAccountName: "ldap-group-syncer"
1 | Configure the settings for the cron job. See "Creating cron jobs" for more information on cron job settings. |
2 | The schedule for the job specified in cron format. This example cron job runs every 30 minutes. Adjust the frequency as necessary, making sure to take into account how long the sync takes to run. |
3 | How long, in seconds, to keep finished jobs. This should match the period of the job schedule in order to clean old failed jobs and prevent unnecessary alerts. For more information, see TTL-after-finished Controller in the Kubernetes documentation. |
4 | The LDAP sync command for the cron job to run. Passes in the sync configuration file that was defined in the config map. |
5 | This secret was created when the LDAP IDP was configured. |
6 | This config map was created when the LDAP IDP was configured. |
Create the cron job:
$ oc create -f ldap-sync-cron-job.yaml
This section contains examples for the RFC 2307, Active Directory, and augmented Active Directory schemas.
These examples assume that all users are direct members of their respective groups. Specifically, no groups have other groups as members. See the Nested Membership Sync Example for information on how to sync nested groups. |
For the RFC 2307 schema, the following examples synchronize a group named admins
that has two
members: Jane
and Jim
. The examples explain:
How the group and users are added to the LDAP server.
What the resulting group record in OpenShift Container Platform will be after synchronization.
These examples assume that all users are direct members of their respective groups. Specifically, no groups have other groups as members. See the Nested Membership Sync Example for information on how to sync nested groups. |
In the RFC 2307 schema, both users (Jane and Jim) and groups exist on the LDAP
server as first-class entries, and group membership is stored in attributes on
the group. The following snippet of ldif
defines the users and group for this
schema:
rfc2307.ldif
dn: ou=users,dc=example,dc=com
objectClass: organizationalUnit
ou: users
dn: cn=Jane,ou=users,dc=example,dc=com
objectClass: person
objectClass: organizationalPerson
objectClass: inetOrgPerson
cn: Jane
sn: Smith
displayName: Jane Smith
mail: jane.smith@example.com
dn: cn=Jim,ou=users,dc=example,dc=com
objectClass: person
objectClass: organizationalPerson
objectClass: inetOrgPerson
cn: Jim
sn: Adams
displayName: Jim Adams
mail: jim.adams@example.com
dn: ou=groups,dc=example,dc=com
objectClass: organizationalUnit
ou: groups
dn: cn=admins,ou=groups,dc=example,dc=com (1)
objectClass: groupOfNames
cn: admins
owner: cn=admin,dc=example,dc=com
description: System Administrators
member: cn=Jane,ou=users,dc=example,dc=com (2)
member: cn=Jim,ou=users,dc=example,dc=com
1 | The group is a first-class entry in the LDAP server. |
2 | Members of a group are listed with an identifying reference as attributes on the group. |
Create the configuration file.
You have access to the cluster as a user with the cluster-admin
role.
Run the sync with the rfc2307_config.yaml
file:
$ oc adm groups sync --sync-config=rfc2307_config.yaml --confirm
OpenShift Container Platform creates the following group record as a result of the above sync operation:
rfc2307_config.yaml
fileapiVersion: user.openshift.io/v1
kind: Group
metadata:
annotations:
openshift.io/ldap.sync-time: 2015-10-13T10:08:38-0400 (1)
openshift.io/ldap.uid: cn=admins,ou=groups,dc=example,dc=com (2)
openshift.io/ldap.url: LDAP_SERVER_IP:389 (3)
creationTimestamp:
name: admins (4)
users: (5)
- jane.smith@example.com
- jim.adams@example.com
1 | The last time this OpenShift Container Platform group was synchronized with the LDAP server, in ISO 6801 format. |
2 | The unique identifier for the group on the LDAP server. |
3 | The IP address and host of the LDAP server where this group’s record is stored. |
4 | The name of the group as specified by the sync file. |
5 | The users that are members of the group, named as specified by the sync file. |
When syncing groups with user-defined name mappings, the configuration file changes to contain these mappings as shown below.
rfc2307_config_user_defined.yaml
kind: LDAPSyncConfig
apiVersion: v1
groupUIDNameMapping:
"cn=admins,ou=groups,dc=example,dc=com": Administrators (1)
rfc2307:
groupsQuery:
baseDN: "ou=groups,dc=example,dc=com"
scope: sub
derefAliases: never
pageSize: 0
groupUIDAttribute: dn (2)
groupNameAttributes: [ cn ] (3)
groupMembershipAttributes: [ member ]
usersQuery:
baseDN: "ou=users,dc=example,dc=com"
scope: sub
derefAliases: never
pageSize: 0
userUIDAttribute: dn (4)
userNameAttributes: [ mail ]
tolerateMemberNotFoundErrors: false
tolerateMemberOutOfScopeErrors: false
1 | The user-defined name mapping. |
2 | The unique identifier attribute that is used for the keys in the
user-defined name mapping. You cannot specify groupsQuery filters when using
DN for groupUIDAttribute. For fine-grained filtering, use the whitelist / blacklist method. |
3 | The attribute to name OpenShift Container Platform groups with if their unique identifier is not in the user-defined name mapping. |
4 | The attribute that uniquely identifies a user on the LDAP server. You
cannot specify usersQuery filters when using DN for userUIDAttribute. For
fine-grained filtering, use the whitelist / blacklist method. |
Create the configuration file.
You have access to the cluster as a user with the cluster-admin
role.
Run the sync with the rfc2307_config_user_defined.yaml
file:
$ oc adm groups sync --sync-config=rfc2307_config_user_defined.yaml --confirm
OpenShift Container Platform creates the following group record as a result of the above sync operation:
rfc2307_config_user_defined.yaml
fileapiVersion: user.openshift.io/v1
kind: Group
metadata:
annotations:
openshift.io/ldap.sync-time: 2015-10-13T10:08:38-0400
openshift.io/ldap.uid: cn=admins,ou=groups,dc=example,dc=com
openshift.io/ldap.url: LDAP_SERVER_IP:389
creationTimestamp:
name: Administrators (1)
users:
- jane.smith@example.com
- jim.adams@example.com
1 | The name of the group as specified by the user-defined name mapping. |
By default, if the groups being synced contain members whose entries are outside of the scope defined in the member query, the group sync fails with an error:
Error determining LDAP group membership for "<group>": membership lookup for user "<user>" in group "<group>" failed because of "search for entry with dn="<user-dn>" would search outside of the base dn specified (dn="<base-dn>")".
This often indicates a misconfigured baseDN
in the usersQuery
field.
However, in cases where the baseDN
intentionally does not contain some of the
members of the group, setting tolerateMemberOutOfScopeErrors: true
allows
the group sync to continue. Out of scope members will be ignored.
Similarly, when the group sync process fails to locate a member for a group, it fails outright with errors:
Error determining LDAP group membership for "<group>": membership lookup for user "<user>" in group "<group>" failed because of "search for entry with base dn="<user-dn>" refers to a non-existent entry". Error determining LDAP group membership for "<group>": membership lookup for user "<user>" in group "<group>" failed because of "search for entry with base dn="<user-dn>" and filter "<filter>" did not return any results".
This often indicates a misconfigured usersQuery
field. However, in cases
where the group contains member entries that are known to be missing, setting
tolerateMemberNotFoundErrors: true
allows the group sync to continue.
Problematic members will be ignored.
Enabling error tolerances for the LDAP group sync causes the sync process to ignore problematic member entries. If the LDAP group sync is not configured correctly, this could result in synced OpenShift Container Platform groups missing members. |
rfc2307_problematic_users.ldif
dn: ou=users,dc=example,dc=com
objectClass: organizationalUnit
ou: users
dn: cn=Jane,ou=users,dc=example,dc=com
objectClass: person
objectClass: organizationalPerson
objectClass: inetOrgPerson
cn: Jane
sn: Smith
displayName: Jane Smith
mail: jane.smith@example.com
dn: cn=Jim,ou=users,dc=example,dc=com
objectClass: person
objectClass: organizationalPerson
objectClass: inetOrgPerson
cn: Jim
sn: Adams
displayName: Jim Adams
mail: jim.adams@example.com
dn: ou=groups,dc=example,dc=com
objectClass: organizationalUnit
ou: groups
dn: cn=admins,ou=groups,dc=example,dc=com
objectClass: groupOfNames
cn: admins
owner: cn=admin,dc=example,dc=com
description: System Administrators
member: cn=Jane,ou=users,dc=example,dc=com
member: cn=Jim,ou=users,dc=example,dc=com
member: cn=INVALID,ou=users,dc=example,dc=com (1)
member: cn=Jim,ou=OUTOFSCOPE,dc=example,dc=com (2)
1 | A member that does not exist on the LDAP server. |
2 | A member that may exist, but is not under the baseDN in the
user query for the sync job. |
To tolerate the errors in the above example, the following additions to your sync configuration file must be made:
rfc2307_config_tolerating.yaml
kind: LDAPSyncConfig
apiVersion: v1
url: ldap://LDAP_SERVICE_IP:389
rfc2307:
groupsQuery:
baseDN: "ou=groups,dc=example,dc=com"
scope: sub
derefAliases: never
groupUIDAttribute: dn
groupNameAttributes: [ cn ]
groupMembershipAttributes: [ member ]
usersQuery:
baseDN: "ou=users,dc=example,dc=com"
scope: sub
derefAliases: never
userUIDAttribute: dn (1)
userNameAttributes: [ mail ]
tolerateMemberNotFoundErrors: true (2)
tolerateMemberOutOfScopeErrors: true (3)
1 | The attribute that uniquely identifies a user on the LDAP server. You
cannot specify usersQuery filters when using DN for userUIDAttribute. For
fine-grained filtering, use the whitelist / blacklist method. |
2 | When true , the sync job tolerates groups for which some members were not
found, and members whose LDAP entries are not found are ignored. The
default behavior for the sync job is to fail if a member of a group is not
found. |
3 | When true , the sync job tolerates groups for which some members are outside
the user scope given in the usersQuery base DN, and members outside the member
query scope are ignored. The default behavior for the sync job is to fail if a
member of a group is out of scope. |
Create the configuration file.
You have access to the cluster as a user with the cluster-admin
role.
Run the sync with the rfc2307_config_tolerating.yaml
file:
$ oc adm groups sync --sync-config=rfc2307_config_tolerating.yaml --confirm
OpenShift Container Platform creates the following group record as a result of the above sync operation:
rfc2307_config.yaml
fileapiVersion: user.openshift.io/v1
kind: Group
metadata:
annotations:
openshift.io/ldap.sync-time: 2015-10-13T10:08:38-0400
openshift.io/ldap.uid: cn=admins,ou=groups,dc=example,dc=com
openshift.io/ldap.url: LDAP_SERVER_IP:389
creationTimestamp:
name: admins
users: (1)
- jane.smith@example.com
- jim.adams@example.com
1 | The users that are members of the group, as specified by the sync file. Members for which lookup encountered tolerated errors are absent. |
In the Active Directory schema, both users (Jane and Jim) exist in the LDAP
server as first-class entries, and group membership is stored in attributes on
the user. The following snippet of ldif
defines the users and group for this
schema:
active_directory.ldif
dn: ou=users,dc=example,dc=com
objectClass: organizationalUnit
ou: users
dn: cn=Jane,ou=users,dc=example,dc=com
objectClass: person
objectClass: organizationalPerson
objectClass: inetOrgPerson
objectClass: testPerson
cn: Jane
sn: Smith
displayName: Jane Smith
mail: jane.smith@example.com
memberOf: admins (1)
dn: cn=Jim,ou=users,dc=example,dc=com
objectClass: person
objectClass: organizationalPerson
objectClass: inetOrgPerson
objectClass: testPerson
cn: Jim
sn: Adams
displayName: Jim Adams
mail: jim.adams@example.com
memberOf: admins
1 | The user’s group memberships are listed as attributes on the user, and the
group does not exist as an entry on the server. The memberOf attribute does
not have to be a literal attribute on the user; in some LDAP servers, it is created
during search and returned to the client, but not committed to the database. |
Create the configuration file.
You have access to the cluster as a user with the cluster-admin
role.
Run the sync with the active_directory_config.yaml
file:
$ oc adm groups sync --sync-config=active_directory_config.yaml --confirm
OpenShift Container Platform creates the following group record as a result of the above sync operation:
active_directory_config.yaml
fileapiVersion: user.openshift.io/v1
kind: Group
metadata:
annotations:
openshift.io/ldap.sync-time: 2015-10-13T10:08:38-0400 (1)
openshift.io/ldap.uid: admins (2)
openshift.io/ldap.url: LDAP_SERVER_IP:389 (3)
creationTimestamp:
name: admins (4)
users: (5)
- jane.smith@example.com
- jim.adams@example.com
1 | The last time this OpenShift Container Platform group was synchronized with the LDAP server, in ISO 6801 format. |
2 | The unique identifier for the group on the LDAP server. |
3 | The IP address and host of the LDAP server where this group’s record is stored. |
4 | The name of the group as listed in the LDAP server. |
5 | The users that are members of the group, named as specified by the sync file. |
In the augmented Active Directory schema, both users (Jane and Jim) and groups
exist in the LDAP server as first-class entries, and group membership is stored
in attributes on the user. The following snippet of ldif
defines the users and
group for this schema:
augmented_active_directory.ldif
dn: ou=users,dc=example,dc=com
objectClass: organizationalUnit
ou: users
dn: cn=Jane,ou=users,dc=example,dc=com
objectClass: person
objectClass: organizationalPerson
objectClass: inetOrgPerson
objectClass: testPerson
cn: Jane
sn: Smith
displayName: Jane Smith
mail: jane.smith@example.com
memberOf: cn=admins,ou=groups,dc=example,dc=com (1)
dn: cn=Jim,ou=users,dc=example,dc=com
objectClass: person
objectClass: organizationalPerson
objectClass: inetOrgPerson
objectClass: testPerson
cn: Jim
sn: Adams
displayName: Jim Adams
mail: jim.adams@example.com
memberOf: cn=admins,ou=groups,dc=example,dc=com
dn: ou=groups,dc=example,dc=com
objectClass: organizationalUnit
ou: groups
dn: cn=admins,ou=groups,dc=example,dc=com (2)
objectClass: groupOfNames
cn: admins
owner: cn=admin,dc=example,dc=com
description: System Administrators
member: cn=Jane,ou=users,dc=example,dc=com
member: cn=Jim,ou=users,dc=example,dc=com
1 | The user’s group memberships are listed as attributes on the user. |
2 | The group is a first-class entry on the LDAP server. |
Create the configuration file.
You have access to the cluster as a user with the cluster-admin
role.
Run the sync with the augmented_active_directory_config.yaml
file:
$ oc adm groups sync --sync-config=augmented_active_directory_config.yaml --confirm
OpenShift Container Platform creates the following group record as a result of the above sync operation:
augmented_active_directory_config.yaml
fileapiVersion: user.openshift.io/v1
kind: Group
metadata:
annotations:
openshift.io/ldap.sync-time: 2015-10-13T10:08:38-0400 (1)
openshift.io/ldap.uid: cn=admins,ou=groups,dc=example,dc=com (2)
openshift.io/ldap.url: LDAP_SERVER_IP:389 (3)
creationTimestamp:
name: admins (4)
users: (5)
- jane.smith@example.com
- jim.adams@example.com
1 | The last time this OpenShift Container Platform group was synchronized with the LDAP server, in ISO 6801 format. |
2 | The unique identifier for the group on the LDAP server. |
3 | The IP address and host of the LDAP server where this group’s record is stored. |
4 | The name of the group as specified by the sync file. |
5 | The users that are members of the group, named as specified by the sync file. |
Groups in OpenShift Container Platform do not nest. The LDAP server must flatten group
membership before the data can be consumed. Microsoft’s Active Directory Server
supports this feature via the
LDAP_MATCHING_RULE_IN_CHAIN
rule, which has the OID 1.2.840.113556.1.4.1941
. Furthermore, only explicitly
whitelisted groups can be synced when using this matching rule.
This section has an example for the augmented Active Directory schema, which
synchronizes a group named admins
that has one user Jane
and one group
otheradmins
as members. The otheradmins
group has one user member: Jim
.
This example explains:
How the group and users are added to the LDAP server.
What the LDAP sync configuration file looks like.
What the resulting group record in OpenShift Container Platform will be after synchronization.
In the augmented Active Directory schema, both users (Jane
and Jim
) and
groups exist in the LDAP server as first-class entries, and group membership is
stored in attributes on the user or the group. The following snippet of ldif
defines the users and groups for this schema:
augmented_active_directory_nested.ldif
dn: ou=users,dc=example,dc=com
objectClass: organizationalUnit
ou: users
dn: cn=Jane,ou=users,dc=example,dc=com
objectClass: person
objectClass: organizationalPerson
objectClass: inetOrgPerson
objectClass: testPerson
cn: Jane
sn: Smith
displayName: Jane Smith
mail: jane.smith@example.com
memberOf: cn=admins,ou=groups,dc=example,dc=com (1)
dn: cn=Jim,ou=users,dc=example,dc=com
objectClass: person
objectClass: organizationalPerson
objectClass: inetOrgPerson
objectClass: testPerson
cn: Jim
sn: Adams
displayName: Jim Adams
mail: jim.adams@example.com
memberOf: cn=otheradmins,ou=groups,dc=example,dc=com (1)
dn: ou=groups,dc=example,dc=com
objectClass: organizationalUnit
ou: groups
dn: cn=admins,ou=groups,dc=example,dc=com (2)
objectClass: group
cn: admins
owner: cn=admin,dc=example,dc=com
description: System Administrators
member: cn=Jane,ou=users,dc=example,dc=com
member: cn=otheradmins,ou=groups,dc=example,dc=com
dn: cn=otheradmins,ou=groups,dc=example,dc=com (2)
objectClass: group
cn: otheradmins
owner: cn=admin,dc=example,dc=com
description: Other System Administrators
memberOf: cn=admins,ou=groups,dc=example,dc=com (1) (3)
member: cn=Jim,ou=users,dc=example,dc=com
1 | The user’s and group’s memberships are listed as attributes on the object. |
2 | The groups are first-class entries on the LDAP server. |
3 | The otheradmins group is a member of the admins group. |
When syncing nested groups with Active Directory, you must provide an LDAP query definition for both user entries and group entries, as well as the attributes with which to represent them in the internal OpenShift Container Platform group records. Furthermore, certain changes are required in this configuration:
The oc adm groups sync
command must explicitly whitelist groups.
The user’s groupMembershipAttributes
must include
"memberOf:1.2.840.113556.1.4.1941:"
to comply with the
LDAP_MATCHING_RULE_IN_CHAIN
rule.
The groupUIDAttribute
must be set to dn
.
The groupsQuery
:
Must not set filter
.
Must set a valid derefAliases
.
Should not set baseDN
as that value is ignored.
Should not set scope
as that value is ignored.
For clarity, the group you create in OpenShift Container Platform should use attributes other than the distinguished name whenever possible for user- or administrator-facing fields. For example, identify the users of an OpenShift Container Platform group by their e-mail, and use the name of the group as the common name. The following configuration file creates these relationships:
augmented_active_directory_config_nested.yaml
kind: LDAPSyncConfig
apiVersion: v1
url: ldap://LDAP_SERVICE_IP:389
augmentedActiveDirectory:
groupsQuery: (1)
derefAliases: never
pageSize: 0
groupUIDAttribute: dn (2)
groupNameAttributes: [ cn ] (3)
usersQuery:
baseDN: "ou=users,dc=example,dc=com"
scope: sub
derefAliases: never
filter: (objectclass=person)
pageSize: 0
userNameAttributes: [ mail ] (4)
groupMembershipAttributes: [ "memberOf:1.2.840.113556.1.4.1941:" ] (5)
1 | groupsQuery filters cannot be specified. The groupsQuery base DN and scope
values are ignored. groupsQuery must set a valid derefAliases . |
2 | The attribute that uniquely identifies a group on the LDAP server. It must be set to dn . |
3 | The attribute to use as the name of the group. |
4 | The attribute to use as the name of the user in the OpenShift Container Platform group
record. mail or sAMAccountName are preferred choices in most installations. |
5 | The attribute on the user that stores the membership information. Note the use
of LDAP_MATCHING_RULE_IN_CHAIN . |
Create the configuration file.
You have access to the cluster as a user with the cluster-admin
role.
Run the sync with the augmented_active_directory_config_nested.yaml
file:
$ oc adm groups sync \
'cn=admins,ou=groups,dc=example,dc=com' \
--sync-config=augmented_active_directory_config_nested.yaml \
--confirm
You must explicitly whitelist the |
OpenShift Container Platform creates the following group record as a result of the above sync operation:
augmented_active_directory_config_nested.yaml
fileapiVersion: user.openshift.io/v1
kind: Group
metadata:
annotations:
openshift.io/ldap.sync-time: 2015-10-13T10:08:38-0400 (1)
openshift.io/ldap.uid: cn=admins,ou=groups,dc=example,dc=com (2)
openshift.io/ldap.url: LDAP_SERVER_IP:389 (3)
creationTimestamp:
name: admins (4)
users: (5)
- jane.smith@example.com
- jim.adams@example.com
1 | The last time this OpenShift Container Platform group was synchronized with the LDAP server, in ISO 6801 format. |
2 | The unique identifier for the group on the LDAP server. |
3 | The IP address and host of the LDAP server where this group’s record is stored. |
4 | The name of the group as specified by the sync file. |
5 | The users that are members of the group, named as specified by the sync file. Note that members of nested groups are included since the group membership was flattened by the Microsoft Active Directory Server. |
The object specification for the configuration file is below. Note that the different schema
objects have different fields. For example, v1.ActiveDirectoryConfig has no groupsQuery
field whereas v1.RFC2307Config and v1.AugmentedActiveDirectoryConfig both do.
There is no support for binary attributes. All attribute data coming from the
LDAP server must be in the format of a UTF-8 encoded string. For example, never
use a binary attribute, such as |
LDAPSyncConfig
holds the necessary configuration options to define an LDAP
group sync.
Name | Description | Schema |
---|---|---|
|
String value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://github.com/kubernetes/community/blob/master/contributors/devel/sig-architecture/api-conventions.md#types-kinds |
string |
|
Defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://github.com/kubernetes/community/blob/master/contributors/devel/sig-architecture/api-conventions.md#resources |
string |
|
Host is the scheme, host and port of the LDAP server to connect to: |
string |
|
Optional DN to bind to the LDAP server with. |
string |
|
Optional password to bind with during the search phase. |
v1.StringSource |
|
If |
boolean |
|
Optional trusted certificate authority bundle to use when making requests to the server. If empty, the default system roots are used. |
string |
|
Optional direct mapping of LDAP group UIDs to OpenShift Container Platform group names. |
object |
|
Holds the configuration for extracting data from an LDAP server set up in a fashion similar to RFC2307: first-class group and user entries, with group membership determined by a multi-valued attribute on the group entry listing its members. |
v1.RFC2307Config |
|
Holds the configuration for extracting data from an LDAP server set up in a fashion similar to that used in Active Directory: first-class user entries, with group membership determined by a multi-valued attribute on members listing groups they are a member of. |
v1.ActiveDirectoryConfig |
|
Holds the configuration for extracting data from an LDAP server set up in a fashion similar to that used in Active Directory as described above, with one addition: first-class group entries exist and are used to hold metadata but not group membership. |
v1.AugmentedActiveDirectoryConfig |
StringSource
allows specifying a string inline, or externally via environment
variable or file. When it contains only a string value, it marshals to a simple
JSON string.
Name | Description | Schema |
---|---|---|
|
Specifies the cleartext value, or an encrypted value if |
string |
|
Specifies an environment variable containing the cleartext value, or an
encrypted value if the |
string |
|
References a file containing the cleartext value, or an encrypted value if a |
string |
|
References a file containing the key to use to decrypt the value. |
string |
LDAPQuery
holds the options necessary to build an LDAP query.
Name | Description | Schema |
---|---|---|
|
DN of the branch of the directory where all searches should start from. |
string |
|
The optional scope of the search. Can be |
string |
|
The optional behavior of the search with regards to aliases. Can be |
string |
|
Holds the limit of time in seconds that any request to the server can remain outstanding before the wait for a response is given up. If this is |
integer |
|
A valid LDAP search filter that retrieves all relevant entries from the LDAP server with the base DN. |
string |
|
Maximum preferred page size, measured in LDAP entries. A page size of |
integer |
RFC2307Config
holds the necessary configuration options to define how an LDAP
group sync interacts with an LDAP server using the RFC2307 schema.
Name | Description | Schema |
---|---|---|
|
Holds the template for an LDAP query that returns group entries. |
v1.LDAPQuery |
|
Defines which attribute on an LDAP group entry will be interpreted as its unique identifier. ( |
string |
|
Defines which attributes on an LDAP group entry will be interpreted as its name to use for an OpenShift Container Platform group. |
string array |
|
Defines which attributes on an LDAP group entry will be interpreted as its members. The values contained in those attributes must be queryable by your |
string array |
|
Holds the template for an LDAP query that returns user entries. |
v1.LDAPQuery |
|
Defines which attribute on an LDAP user entry will be interpreted as its unique identifier. It must correspond to values that will be found from the |
string |
|
Defines which attributes on an LDAP user entry will be used, in order, as its OpenShift Container Platform user name. The first attribute with a non-empty value is used. This should match your |
string array |
|
Determines the behavior of the LDAP sync job when missing user entries are encountered. If |
boolean |
|
Determines the behavior of the LDAP sync job when out-of-scope user entries are encountered. If |
boolean |
ActiveDirectoryConfig
holds the necessary configuration options to define how
an LDAP group sync interacts with an LDAP server using the Active Directory
schema.
Name | Description | Schema |
---|---|---|
|
Holds the template for an LDAP query that returns user entries. |
v1.LDAPQuery |
|
Defines which attributes on an LDAP user entry will be interpreted as its OpenShift Container Platform user name. The attribute to use as the name of the user in the OpenShift Container Platform group
record. |
string array |
|
Defines which attributes on an LDAP user entry will be interpreted as the groups it is a member of. |
string array |
AugmentedActiveDirectoryConfig
holds the necessary configuration options to
define how an LDAP group sync interacts with an LDAP server using the augmented
Active Directory schema.
Name | Description | Schema |
---|---|---|
|
Holds the template for an LDAP query that returns user entries. |
v1.LDAPQuery |
|
Defines which attributes on an LDAP user entry will be interpreted as its OpenShift Container Platform user name. The attribute to use as the name of the user in the OpenShift Container Platform group
record. |
string array |
|
Defines which attributes on an LDAP user entry will be interpreted as the groups it is a member of. |
string array |
|
Holds the template for an LDAP query that returns group entries. |
v1.LDAPQuery |
|
Defines which attribute on an LDAP group entry will be interpreted as its unique identifier. ( |
string |
|
Defines which attributes on an LDAP group entry will be interpreted as its name to use for an OpenShift Container Platform group. |
string array |