OpenLDAP Helm Chart

Disclaimer

This version now use the Bitnami Openldap container image.

More detail on the container image can be found here

The chart now support Bitnami/Openldap 2.x.

Due to #115, the chart does not fully support scaling the openldap cluster. To scale the cluster please follow scaling your cluster

• This will be fixed in priority

Prerequisites Details

• Kubernetes 1.8+
• PV support on the underlying infrastructure

Chart Details

This chart will do the following:

• Instantiate 3 instances of OpenLDAP server with multi-master replication
• A phpldapadmin to administrate the OpenLDAP server
• ltb-passwd for self service password

Now provide read-only feature ! more details

TL;DR

To install the chart with the release name my-release:

$ helm repo add helm-openldap https://jp-gouin.github.io/helm-openldap/
$ helm install my-release helm-openldap/openldap-stack-ha

Configuration

We use the container images provided by https://github.com/bitnami/containers/tree/main/bitnami/openldap. The container image is highly configurable and well documented. Please consult to documentation of the image for more information.

The following table lists the configurable parameters of the openldap chart and their default values.

Global section

Global parameters to configure the deployment of the application.

Parameter	Description	Default
global.imageRegistry	Global image registry	""
global.imagePullSecrets	Global list of imagePullSecrets	[]
global.ldapDomain	Domain LDAP can be explicit dc=example,dc=org or domain based example.org	example.org
global.existingSecret	Use existing secret for credentials - the expected keys are LDAP_ADMIN_PASSWORD and LDAP_CONFIG_ADMIN_PASSWORD	""
global.adminUser	Openldap database admin user	admin
global.adminPassword	Administration password of Openldap	Not@SecurePassw0rd
global.configUser	Openldap configuration admin user	admin
global.configPassword	Configuration password of Openldap	Not@SecurePassw0rd
global.ldapPort	Ldap port	389
global.sslLdapPort	Ldaps port	636

Application parameters

Parameters related to the configuration of the application.

Parameter	Description	Default
replicaCount	Number of replicas	3
readOnlyReplicaCount	Number of read-only replicas	0
users	User list to create (comma separated list) , can't be use with customLdifFiles	""
userPasswords	User password to create (comma seprated list)	""
group	Group to create and add list of user above	""
env	List of key value pairs as env variables to be sent to the docker image. See https://github.com/bitnami/containers/tree/main/bitnami/openldap for available ones	[see values.yaml]
initTLSSecret.tls_enabled	Set to enable TLS/LDAPS with custom certificate - Please also set initTLSSecret.secret, otherwise it will not take effect	false
initTLSSecret.secret	Secret containing TLS cert and key must contain the keys tls.key , tls.crt and ca.crt	""
customSchemaFiles	Custom openldap schema files used in addition to default schemas	""
customLdifFiles	Custom openldap configuration files used to override default settings	""
customLdifCm	Existing configmap with custom ldif. Can't be use with customLdifFiles	""
customAcls	Custom openldap ACLs. Overrides default ones.	""
replication.enabled	Enable the multi-master replication	true
replication.retry	retry period for replication in sec	60
replication.timeout	timeout for replication in sec	1
replication.starttls	starttls replication	critical
replication.tls_reqcert	override the tls_reqcert parameter (default if never and demand when initTLSSecret.tls_enabled = true )	never
replication.tls_cacert	override the location of tls_cacert to trust (allowed when initTLSSecret.tls_enabled = true )	nil
replication.interval	interval for replication	00:00:00:10
replication.clusterName	Set the clustername for replication	"cluster.local"

Phpladadmin configuration

Parameters related to PHPLdapAdmin

Parameter	Description	Default
phpldapadmin.enabled	Enable the deployment of PhpLdapAdmin	true
phpldapadmin.ingress	Ingress of Phpldapadmin	{}
phpldapadmin.env	Environment variables for PhpldapAdmin	{PHPLDAPADMIN_LDAP_CLIENT_TLS_REQCERT: "never"}

For more advance configuration see README.md For all possible chart parameters see chart's README.md

Self-service password configuration

Parameters related to Self-service password.

Parameter	Description	Default
ltb-passwd.enabled	Enable the deployment of Ltb-Passwd	true
ltb-passwd.ingress	Ingress of the Ltb-Passwd service	{}

For more advance configuration see README.md For all possible parameters see chart's README.md

Kubernetes parameters

Parameters related to Kubernetes.

Parameter	Description	Default
updateStrategy	StatefulSet update strategy	{}
kubeVersion	kubeVersion Override Kubernetes version	""
nameOverride	String to partially override common.names.fullname	""
fullnameOverride	fullnameOverride String to fully override common.names.fullname	""
commonLabels	commonLabels Labels to add to all deployed objects	{}
clusterDomain	clusterDomain Kubernetes cluster domain name	cluster.local
extraDeploy	extraDeploy Array of extra objects to deploy with the release	""
service.annotations	Annotations to add to the service	{}
service.externalIPs	Service external IP addresses	[]
service.enableLdapPort	Enable LDAP port on the service and headless service	true
service.enableSslLdapPort	Enable SSL LDAP port on the service and headless service	true
service.ldapPortNodePort	Nodeport of External service port for LDAP if service.type is NodePort	nil
service.clusterIP	Static cluster IP to assign to the service (if supported)	nil
service.loadBalancerIP	IP address to assign to load balancer (if supported)	""
service.loadBalancerSourceRanges	List of IP CIDRs allowed access to load balancer (if supported)	[]
service.sslLdapPortNodePort	Nodeport of External service port for SSL if service.type is NodePort	nil
service.type	Service type can be ClusterIP, NodePort, LoadBalancer	ClusterIP
service.sslLdapPortNodePort	Nodeport of External service port for SSL if service.type is NodePort	nil
service.ipFamilyPolicy	Represents the dual-stack-ness requested or required by this Service.	SingleStack
serviceReadOnly.annotations	Annotations to add to the service	{}
serviceReadOnly.externalIPs	Service external IP addresses	[]
serviceReadOnly.enableLdapPort	Enable LDAP port on the service and headless service	true
serviceReadOnly.enableSslLdapPort	Enable SSL LDAP port on the service and headless service	true
serviceReadOnly.ldapPortNodePort	Nodeport of External service port for LDAP if service.type is NodePort	nil
serviceReadOnly.clusterIP	Static cluster IP to assign to the service (if supported)	nil
serviceReadOnly.loadBalancerIP	IP address to assign to load balancer (if supported)	""
serviceReadOnly.loadBalancerSourceRanges	List of IP CIDRs allowed access to load balancer (if supported)	[]
serviceReadOnly.sslLdapPortNodePort	Nodeport of External service port for SSL if service.type is NodePort	nil
serviceReadOnly.type	Service type can be ClusterIP, NodePort, LoadBalancer	ClusterIP
serviceReadOnly.ipFamilyPolicy	Represents the dual-stack-ness requested or required by this Service.	SingleStack
persistence.enabled	Whether to use PersistentVolumes or not	false
persistence.storageClass	Storage class for PersistentVolumes.	<unset>
persistence.existingClaim	Add existing Volumes Claim.	<unset>
persistence.accessMode	Access mode for PersistentVolumes	ReadWriteOnce
persistence.size	PersistentVolumeClaim storage size	8Gi
extraVolumes	Allow add extra volumes which could be mounted to statefulset	None
extraVolumeMounts	Add extra volumes to statefulset	None
customReadinessProbe	Liveness probe configuration	[see values.yaml]
customLivenessProbe	Readiness probe configuration	[see values.yaml]
customStartupProbe	Startup probe configuration	[see values.yaml]
command	Override default container command (useful when using custom images)	[]
args	Override default container args (useful when using custom images)	'[]'
resources	Container resource requests and limits in yaml	{}
podSecurityContext	Enabled OPENLDAP pods' Security Context	true
containerSecurityContext	Set OPENLDAP pod's Security Context fsGroup	true
existingConfigmap	existingConfigmap The name of an existing ConfigMap with your custom configuration for OPENLDAP	``
podLabels	podLabels Extra labels for OPENLDAP pods	{}
podAnnotations	podAnnotations Extra annotations for OPENLDAP pods	{}
podAffinityPreset	podAffinityPreset Pod affinity preset. Ignored if affinity is set. Allowed values: soft or hard	``
podAntiAffinityPreset	podAntiAffinityPreset Pod anti-affinity preset. Ignored if affinity is set. Allowed values: soft or hard	soft
pdb.enabled	Enable Pod Disruption Budget	false
pdb.minAvailable	Configure PDB to have at least this many health replicas.	1
pdb.maxUnavailable	Configure PDB to have at most this many unhealth replicas.	<unset>
nodeAffinityPreset	nodeAffinityPreset.type Node affinity preset type. Ignored if affinity is set. Allowed values: soft or hard	true
affinity	affinity Affinity for OPENLDAP pods assignment	``
nodeSelector	nodeSelector Node labels for OPENLDAP pods assignment	``
sidecars	sidecars Add additional sidecar containers to the OPENLDAP pod(s)	``
initContainers	initContainers Add additional init containers to the OPENLDAP pod(s)	``
volumePermissions	'volumePermissions' init container parameters	``
priorityClassName	OPENLDAP pods' priority class name	``
tolerations	Tolerations for pod assignment	[]

Specify each parameter using the --set key=value[,key=value] argument to helm install.

Alternatively, a YAML file that specifies the values for the parameters can be provided while installing the chart. For example,

$ helm install --name my-release -f values.yaml stable/openldap

Tip: You can use the default values.yaml

PhpLdapAdmin

To enable PhpLdapAdmin set phpldapadmin.enabled to true

Ingress can be configure if you want to expose the service. Setup the env part of the configuration to access the OpenLdap server

Note : The ldap host should match the following namespace.Appfullname

Example :

phpldapadmin:
  enabled: true
  ingress:
    enabled: true
    annotations: {}
    # Assuming that ingress-nginx is used
    ingressClassName: nginx
    path: /
    ## Ingress Host
    hosts:
    - phpldapadmin.local
  env:
    PHPLDAPADMIN_LDAP_CLIENT_TLS_REQCERT: "never"

Self-service-password

To enable Self-service-password set ltb-passwd.enabled to true

Ingress can be configure if you want to expose the service.

Setup the ldap part with the information of the OpenLdap server.

Set bindDN accordingly to your ldap domain

Note : The ldap server host should match the following ldap://namespace.Appfullname

Example :

ltb-passwd:
  enabled : true
  ingress:
    enabled: true
    annotations: {}
    # Assuming that ingress-nginx is used
    ingressClassName: nginx
    host: "ssl-ldap2.local"

Cleanup orphaned Persistent Volumes

Deleting the Deployment will not delete associated Persistent Volumes if persistence is enabled.

Do the following after deleting the chart release to clean up orphaned Persistent Volumes.

$ kubectl delete pvc -l release=${RELEASE-NAME}

Custom Secret

global.existingSecret can be used to override the default secret.yaml provided

Scaling your cluster

In order to scale the cluster, first use helm to updrgade the number of replica

helm upgrade -n openldap-ha --set replicaCount=4 openldap-ha .

Then connect to the <openldap>-0 container, under /opt/bitnami/openldap/etc/schema/, edit :

1. serverid.ldif and remove existing olcServerID (only keep the one you added by scaling)
2. brep.ldif and remove existing olcServerID (only keep the one you added by scaling)
3. Apply your changes

ldapmodify -Y EXTERNAL -H ldapi:/// -f /tmp/serverid.ldif
ldapmodify -Y EXTERNAL -H ldapi:/// -f /tmp/brep.ldif

Tips : to edit in the container, use :

cat <<EOF > /tmp/serverid.ldif
copy
your
line
EOF

Read Only

By setting readOnlyReplicaCount to 1 or more, you turn on the read-only cluster.

This create a read-only statefullset that replicates data against the main nodes.

Warning

Schemas are not replicated, so make sure every schemas are defined in customSchemaFiles

Main nodes are not aware of the read-only cluster so that failures in read-only nodes don't have any impact on the main cluster.

This feature uses the olcReadOnly: TRUE directive

This directive puts the database into "read-only" mode. Any attempts to modify the database will return an "unwilling to perform" error. If set on a consumer, modifications sent by syncrepl will still occur.

Troubleshoot

You can increase the level of log using env.LDAP_LOGLEVEL

Valid log levels can be found here

Boostrap custom ldif

Warning when using custom ldif in the customLdifFiles or customLdifCm section you have to create the high level object organization

dn: dc=test,dc=example
dc: test
o: Example Inc.
objectclass: top
objectclass: dcObject
objectclass: organization

note the admin user is created by the application and should not be added as a custom ldif

All internal configuration like cn=config , cn=module{0},cn=config cannot be configured yet.

Changelog/Updating

To 4.x

• Extra schema are supported (examples can be found here and here
• Feature read-only nodes
• TLS can be enforced for the replication
• Use a forked version of Bitnami available here because of this issue

To 4.0.0

This major update switch the base image from Osixia to Bitnami Openldap

• Upgrade may not work fine between 3.x and 4.x
• Ldap and Ldaps port are non privileged ports (1389 and 1636)
• Replication is now purely setup by configuration
• Extra schema cannot be added/modified

A default tree (Root organisation, users and group) is created during startup, this can be skipped using LDAP_SKIP_DEFAULT_TREE , however you need to use customLdifFiles or customLdifCm to create a root organisation.

• This will be improved in a future update.

To 3.0.0

This major update of the chart enable new feature for the deployment such as :

• supporting initcontainer
• supporting sidecar
• use global parameters to ease the configuration of the app
• out of the box integration with phpldapadmin and self-service password in a secure way