Create Oracle Unified Directory Instances

1. Introduction
2. Create a Kubernetes namespace
3. Create a Kubernetes secret for the container registry
4. Create a Kubernetes secret for cronjob images
5. The oud-ds-rs Helm chart
6. Create OUD instances
7. Helm command output
8. Verify the OUD deployment
9. Verify the OUD replication
10. Verify the cronjob
11. Undeploy an OUD deployment
12. Appendix: Configuration parameters

Introduction

This chapter demonstrates how to deploy Oracle Unified Directory (OUD) 12c instance(s) and replicated instances using the Helm package manager for Kubernetes.

The helm chart can be used to deploy an Oracle Unified Directory instance as a base, with configured sample entries, and multiple replicated Oracle Unified Directory instances/pods/services based on the specified replicaCount.

Based on the configuration, this chart deploys the following objects in the specified namespace of a Kubernetes cluster.

• Service Account
• Secret
• Persistent Volume and Persistent Volume Claim
• Pod(s)/Container(s) for Oracle Unified Directory Instances
• Services for interfaces exposed through Oracle Unified Directory Instances
• Ingress configuration

Note: From July 22 (22.3.1) onwards OUD deployment is performed using StatefulSets.

Create a Kubernetes namespace

Create a Kubernetes namespace for the OUD deployment by running the following command:

$ kubectl create namespace <namespace>

For example:

$ kubectl create namespace oudns

The output will look similar to the following:

namespace/oudns created

Create a Kubernetes secret for the container registry

Create a Kubernetes secret to stores the credentials for the container registry where the OUD image is stored. This step must be followed if using Oracle Container Registry or your own private container registry. If you are not using a container registry and have loaded the images on each of the master and worker nodes, you can skip this step.

1. Run the following command to create the secret:

   kubectl create secret docker-registry "orclcred" --docker-server=<CONTAINER_REGISTRY> \
   --docker-username="<USER_NAME>" \
   --docker-password=<PASSWORD> --docker-email=<EMAIL_ID> \
   --namespace=<domain_namespace>
   

   For example, if using Oracle Container Registry:

   $ kubectl create secret docker-registry "orclcred" --docker-server=container-registry.oracle.com \
   --docker-username="user@example.com" \
   --docker-password=password --docker-email=user@example.com \
   --namespace=oudns
   

   Replace <USER_NAME> and <PASSWORD> with the credentials for the registry with the following caveats:

   • If using Oracle Container Registry to pull the OUD container image, this is the username and password used to login to Oracle Container Registry. Before you can use this image you must login to Oracle Container Registry, navigate to Middleware > oud_cpu and accept the license agreement.

   • If using your own container registry to store the OUD container image, this is the username and password (or token) for your container registry.

   The output will look similar to the following:

   secret/orclcred created
   

Create a Kubernetes secret for cronjob images

Once OUD is deployed, if the Kubernetes node where the OUD pod(s) is/are running goes down after the pod eviction time-out, the pod(s) don’t get evicted but move to a Terminating state. The pod(s) will then remain in that state forever. To avoid this problem a cron-job is created during OUD deployment that checks for any pods in Terminating state. If there are any pods in Terminating state, the cron job will delete them. The pods will then start again automatically. This cron job requires access to images on hub.docker.com. A Kubernetes secret must therefore be created to enable access to these images.

1. Create a Kubernetes secret to access the required images on hub.docker.com:

   Note: You must first have a user account on hub.docker.com:

   $ kubectl create secret docker-registry "dockercred" --docker-server="https://index.docker.io/v1/" --docker-username="<docker_username>" --docker-password=<password> --docker-email=<docker_email_credentials> --namespace=<domain_namespace>
   

   For example:

   $ kubectl create secret docker-registry "dockercred" --docker-server="https://index.docker.io/v1/" --docker-username="username" --docker-password=<password> --docker-email=user@example.com --namespace=oudns
   

   The output will look similar to the following:

   secret/dockercred created
   

The oud-ds-rs Helm chart

The oud-ds-rs Helm chart allows you to create or deploy a group of replicated Oracle Unified Directory instances along with Kubernetes objects in a specified namespace.

The deployment can be initiated by running the following Helm command with reference to the oud-ds-rs Helm chart, along with configuration parameters according to your environment.

$ cd $WORKDIR/kubernetes/helm
$ helm install --namespace <namespace> \
<Configuration Parameters> \
<deployment/release name> \
<Helm Chart Path/Name>

Configuration Parameters (override values in chart) can be passed on with --set arguments on the command line and/or with -f / --values arguments when referring to files.

Note: The examples in Create OUD instances below provide values which allow the user to override the default values provided by the Helm chart. A full list of configuration parameters and their default values is shown in Appendix: Configuration parameters.

For more details about the helm command and parameters, please execute helm --help and helm install --help.

Create OUD instances

You can create OUD instances using one of the following methods:

1. Using a YAML file
2. Using --set argument

Note: While it is possible to install sample data during the OID deployment is it not possible to load your own data via an ldif file . In order to load data in OUD, create the OUD deployment and then use ldapmodify post the ingress deployment. See Using LDAP utilities.

Using a YAML file

1. Navigate to the $WORKDIR/kubernetes/helm directory:

   $ cd $WORKDIR/kubernetes/helm
   

2. Create an oud-ds-rs-values-override.yaml as follows:

   image:
     repository: <image_location>
     tag: <image_tag>
     pullPolicy: IfNotPresent
   imagePullSecrets:
     - name: orclcred
   oudConfig:
     rootUserPassword: <password>
     sampleData: "200"
   persistence:
     type: filesystem
     filesystem:
       hostPath:
         path: <persistent_volume>/oud_user_projects
   cronJob:
     kubectlImage:
       repository: bitnami/kubectl
       tag: <version>
       pullPolicy: IfNotPresent
    
     imagePullSecrets:
       - name: dockercred
   

   For example:

   image:
     repository: container-registry.oracle.com/middleware/oud_cpu
     tag: 12.2.1.4-jdk8-ol7-<jul22>
     pullPolicy: IfNotPresent
   imagePullSecrets:
     - name: orclcred
   oudConfig:
     rootUserPassword: <password>
     sampleData: "200"
   persistence:
     type: filesystem
     filesystem:
       hostPath:
         path: /scratch/shared/oud_user_projects
   cronJob:
     kubectlImage:
       repository: bitnami/kubectl
       tag: 1.21.6
       pullPolicy: IfNotPresent
    
     imagePullSecrets:
       - name: dockercred
   

   The following caveats exist:

   • Replace <password> with the relevant password.

   • sampleData: "200" will load 200 sample users into the default baseDN dc=example,dc=com. If you do not want sample data, remove this entry. If sampleData is set to 1,000,000 users or greater, then you must add the following entries to the yaml file to prevent inconsistencies in dsreplication:

     deploymentConfig:
       startupTime: 720
       period: 120
       timeout: 60
     

   • The <version> in kubectlImage tag: should be set to the same version as your Kubernetes version (kubectl version). For example if your Kubernetes version is 1.21.6 set to 1.21.6.

   • If you are not using Oracle Container Registry or your own container registry for your OUD container image, then you can remove the following:

     imagePullSecrets:
       - name: orclcred
     

   • If using NFS for your persistent volume then change the persistence section as follows:

     persistence:
       type: networkstorage
       networkstorage:
         nfs: 
           path: <persistent_volume>/oud_user_projects
           server: <NFS IP address>
     

3. Run the following command to deploy OUD:

   $ helm install --namespace <namespace> \
   --values oud-ds-rs-values-override.yaml \
   <release_name> oud-ds-rs
   

   For example:

   $ helm install --namespace oudns \
   --values oud-ds-rs-values-override.yaml \
   oud-ds-rs oud-ds-rs
   

4. Check the OUD deployment as per Verify the OUD deployment and Verify the OUD replication.

Using --set argument

1. Navigate to the $WORKDIR/kubernetes/helm directory:

   $ cd $WORKDIR/kubernetes/helm
   

2. Run the following command to create OUD instances:

   $ helm install --namespace <namespace> \
   --set oudConfig.rootUserPassword=<password>,persistence.filesystem.hostPath.path=<persistent_volume>/oud_user_projects,image.repository=<image_location>,image.tag=<image_tag> \
   --set oudConfig.sampleData="200" \
   --set cronJob.kubectlImage.repository=bitnami/kubectl,cronJob.kubectlImage.tag=<version> \
   --set cronJob.imagePullSecrets[0].name="dockercred" \
   --set imagePullSecrets[0].name="orclcred" \
   <release_name> oud-ds-rs
   

   For example:

   $ helm install --namespace oudns \
   --set oudConfig.rootUserPassword=<password>,persistence.filesystem.hostPath.path=/scratch/shared/oud_user_projects,image.repository=container-registry.oracle.com/middleware/oud_cpu,image.tag=12.2.1.4-jdk8-ol7-<jul22> \
   --set oudConfig.sampleData="200" \
   --set cronJob.kubectlImage.repository=bitnami/kubectl,cronJob.kubectlImage.tag=1.21.6 \
   --set cronJob.imagePullSecrets[0].name="dockercred" \
   --set imagePullSecrets[0].name="orclcred" \
   oud-ds-rs oud-ds-rs
   

   The following caveats exist:

   • Replace <password> with a the relevant password.
   • sampleData: "200" will load 200 sample users into the default baseDN dc=example,dc=com. If you do not want sample data, remove this entry. If sampleData is set to 1,000,000 users or greater, then you must add the following entries to the yaml file to prevent inconsistencies in dsreplication: --set deploymentConfig.startupTime=720,deploymentConfig.period=120,deploymentConfig.timeout=60.
   • The <version> in kubectlImage tag: should be set to the same version as your Kubernetes version (kubectl version). For example if your Kubernetes version is 1.21.6 set to 1.21.6.
   • If using using NFS for your persistent volume then use persistence.networkstorage.nfs.path=<persistent_volume>/oud_user_projects,persistence.networkstorage.nfs.server:<NFS IP address>.
   • If you are not using Oracle Container Registry or your own container registry for your OUD container image, then you can remove the following: --set imagePullSecrets[0].name="orclcred".

3. Check the OUD deployment as per Verify the OUD deployment and Verify the OUD replication.

Helm command output

In all the examples above, the following output is shown following a successful execution of the helm install command.

NAME: oud-ds-rs
LAST DEPLOYED:  Mon Jul 11 12:02:40 2022
NAMESPACE: oudns
STATUS: deployed
REVISION: 4
NOTES:
#
# Copyright (c) 2020, Oracle and/or its affiliates.
#
#  Licensed under the Universal Permissive License v 1.0 as shown at
# https://oss.oracle.com/licenses/upl
#
#
Since "nginx" has been chosen, follow the steps below to configure nginx ingress controller.
Add Repo reference to helm for retriving/installing Chart for nginx-ingress implementation.
command-# helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx

Command helm install to install nginx-ingress related objects like pod, service, deployment, etc.
# helm install --namespace <namespace for ingress> --values nginx-ingress-values-override.yaml lbr-nginx ingress-nginx/ingress-nginx

For details of content of nginx-ingress-values-override.yaml refer README.md file of this chart.

Run these commands to check port mapping and services:
# kubectl --namespace <namespace for ingress> get services -o wide -w lbr-nginx-ingress-controller
# kubectl describe --namespace <namespace for oud-ds-rs chart> ingress.extensions/oud-ds-rs-http-ingress-nginx
# kubectl describe --namespace <namespace for oud-ds-rs chart> ingress.extensions/oud-ds-rs-admin-ingress-nginx

Accessible interfaces through ingress:
(External IP Address for LoadBalancer NGINX Controller can be determined through details associated with lbr-nginx-ingress-controller)

1. OUD Admin REST:
   Port: http/https

2. OUD Data REST:
   Port: http/https

3. OUD Data SCIM:
   Port: http/https

4. OUD LDAP/LDAPS:
   Port: ldap/ldaps

5. OUD Admin LDAPS:
   Port: ldaps

Please refer to README.md from Helm Chart to find more details about accessing interfaces and configuration parameters.

Verify the OUD deployment

Run the following command to verify the OUD deployment:

$ kubectl --namespace <namespace> get pod,service,secret,pv,pvc,ingress -o wide

For example:

$ kubectl --namespace oudns get pod,service,secret,pv,pvc,ingress -o wide

The output will look similar to the following:

NAME                                  READY   STATUS      RESTARTS   AGE     IP             NODE            NOMINATED NODE   READINESS GATES
pod/oud-ds-rs-0                       1/1     Running     0          14m     10.244.1.180   <Worker Node>   <none>           <none>
pod/oud-ds-rs-1                       1/1     Running     0          8m26s   10.244.1.181   <Worker Node>   <none>           <none>
pod/oud-ds-rs-2                       0/1     Running     0          2m24s   10.244.1.182   <Worker Node>   <none>           <none>
pod/oud-pod-cron-job-27586680-p5d8q   0/1     Completed   0          50s     10.244.1.183   <Worker Node>   <none>           <none>

NAME                          TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)                                                          AGE   SELECTOR
service/oud-ds-rs             ClusterIP   None             <none>        1444/TCP,1888/TCP,1389/TCP,1636/TCP,1080/TCP,1081/TCP,1898/TCP   14m   app.kubernetes.io/instance=oud-ds-rs,app.kubernetes.io/name=oud-ds-rs
service/oud-ds-rs-0           ClusterIP   10.107.202.164   <none>        1444/TCP,1888/TCP,1898/TCP                                       14m   app.kubernetes.io/instance=oud-ds-rs,app.kubernetes.io/name=oud-ds-rs,statefulset.kubernetes.io/pod-name=oud-ds-rs-0
service/oud-ds-rs-1           ClusterIP   10.102.101.53    <none>        1444/TCP,1888/TCP,1898/TCP                                       14m   app.kubernetes.io/instance=oud-ds-rs,app.kubernetes.io/name=oud-ds-rs,statefulset.kubernetes.io/pod-name=oud-ds-rs-1
service/oud-ds-rs-2           ClusterIP   10.110.137.63    <none>        1444/TCP,1888/TCP,1898/TCP                                       14m   app.kubernetes.io/instance=oud-ds-rs,app.kubernetes.io/name=oud-ds-rs,statefulset.kubernetes.io/pod-name=oud-ds-rs-2
service/oud-ds-rs-http-0      ClusterIP   10.102.148.153   <none>        1080/TCP,1081/TCP                                                14m   app.kubernetes.io/instance=oud-ds-rs,app.kubernetes.io/name=oud-ds-rs,statefulset.kubernetes.io/pod-name=oud-ds-rs-0
service/oud-ds-rs-http-1      ClusterIP   10.98.170.188    <none>        1080/TCP,1081/TCP                                                14m   app.kubernetes.io/instance=oud-ds-rs,app.kubernetes.io/name=oud-ds-rs,statefulset.kubernetes.io/pod-name=oud-ds-rs-1
service/oud-ds-rs-http-2      ClusterIP   10.101.169.181   <none>        1080/TCP,1081/TCP                                                14m   app.kubernetes.io/instance=oud-ds-rs,app.kubernetes.io/name=oud-ds-rs,statefulset.kubernetes.io/pod-name=oud-ds-rs-2
service/oud-ds-rs-lbr-admin   ClusterIP   10.97.137.179    <none>        1888/TCP,1444/TCP                                                14m   app.kubernetes.io/instance=oud-ds-rs,app.kubernetes.io/name=oud-ds-rs
service/oud-ds-rs-lbr-http    ClusterIP   10.109.82.7      <none>        1080/TCP,1081/TCP                                                14m   app.kubernetes.io/instance=oud-ds-rs,app.kubernetes.io/name=oud-ds-rs
service/oud-ds-rs-lbr-ldap    ClusterIP   10.104.73.92     <none>        1389/TCP,1636/TCP                                                14m   app.kubernetes.io/instance=oud-ds-rs,app.kubernetes.io/name=oud-ds-rs
service/oud-ds-rs-ldap-0      ClusterIP   10.107.99.240    <none>        1389/TCP,1636/TCP                                                14m   app.kubernetes.io/instance=oud-ds-rs,app.kubernetes.io/name=oud-ds-rs,statefulset.kubernetes.io/pod-name=oud-ds-rs-0
service/oud-ds-rs-ldap-1      ClusterIP   10.108.219.79    <none>        1389/TCP,1636/TCP                                                14m   app.kubernetes.io/instance=oud-ds-rs,app.kubernetes.io/name=oud-ds-rs,statefulset.kubernetes.io/pod-name=oud-ds-rs-1
service/oud-ds-rs-ldap-2      ClusterIP   10.104.231.98    <none>        1389/TCP,1636/TCP                                                14m   app.kubernetes.io/instance=oud-ds-rs,app.kubernetes.io/name=oud-ds-rs,statefulset.kubernetes.io/pod-name=oud-ds-rs-2

NAME                                     TYPE                                  DATA   AGE
secret/default-token-msmmd               kubernetes.io/service-account-token   3      3d20h
secret/dockercred                        kubernetes.io/dockerconfigjson        1      3d20h
secret/orclcred                          kubernetes.io/dockerconfigjson        1      3d20h
secret/oud-ds-rs-creds                   opaque                                8      14m
secret/oud-ds-rs-job-token-2xlmj         kubernetes.io/service-account-token   3      14m
secret/oud-ds-rs-tls-cert                kubernetes.io/tls                     2      14m
secret/oud-ds-rs-token-2tprv             kubernetes.io/service-account-token   3      14m
secret/sh.helm.release.v1.oud-ds-rs.v1   helm.sh/release.v1                    1      14m

NAME                                 CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                       STORAGECLASS        REASON   AGE    VOLUMEMODE
persistentvolume/oud-ds-rs-pv        20Gi       RWX            Delete           Bound    oudns/oud-ds-rs-pvc         manual                       14m    Filesystem

NAME                                  STATUS   VOLUME         CAPACITY   ACCESS MODES   STORAGECLASS   AGE   VOLUMEMODE
persistentvolumeclaim/oud-ds-rs-pvc   Bound    oud-ds-rs-pv   20Gi       RWX            manual         14m   Filesystem

NAME                                                      CLASS    HOSTS                                                               ADDRESS   PORTS     AGE
ingress.networking.k8s.io/oud-ds-rs-admin-ingress-nginx   <none>   oud-ds-rs-admin-0,oud-ds-rs-admin-0,oud-ds-rs-admin-1 + 3 more...             80, 443   14m
ingress.networking.k8s.io/oud-ds-rs-http-ingress-nginx    <none>   oud-ds-rs-http-0,oud-ds-rs-http-1,oud-ds-rs-http-2 + 3 more...                80, 443   14m

Note: Initially pod/oud-ds-rs-0 will appear with a STATUS of 0/1 and it will take approximately 5 minutes before OUD is started (1/1). Once pod/oud-ds-rs-0 has a STATUS of 1/1, pod/oud-ds-rs-1 will appear with a STATUS of 0/1. Once pod/oud-ds-rs-1 is started (1/1), pod/oud-ds-rs-2 will appear. It will take around 15 minutes for all the pods to fully started.

While the oud-ds-rs pods have a STATUS of 0/1 the pod is running but OUD server associated with it is currently starting. While the pod is starting you can check the startup status in the pod logs, by running the following command:

$ kubectl logs <pod> -n oudns

For example:

$ kubectl logs oud-ds-rs-0 -n oudns

Note : If the OUD deployment fails additionally refer to Troubleshooting for instructions on how describe the failing pod(s). Once the problem is identified follow Undeploy an OUD deployment to clean down the deployment before deploying again.

Kubernetes Objects

Kubernetes objects created by the Helm chart are detailed in the table below:

• In the table above the ‘Example Name’ for each Object is based on the value ‘oud-ds-rs’ as deployment/release name for the Helm chart installation.

Verify the OUD replication

Once all the PODs created are visible as READY (i.e. 1/1), you can verify your replication across multiple Oracle Unified Directory instances.

1. To verify the replication group, connect to the container and issue an OUD administration command to show the details. The name of the container can be found by issuing the following:

   $ kubectl get pods -n <namespace> -o jsonpath='{.items[*].spec.containers[*].name}'
   

   For example:

   $ kubectl get pods -n oudns -o jsonpath='{.items[*].spec.containers[*].name}'
   

   The output will look similar to the following:

   oud-ds-rs oud-ds-rs oud-ds-rs
   

   Once you have the container name you can verify the replication status in the following ways:

   • Run dresplication inside the pod
   • Using kubectl commands

Run dresplication inside the pod

1. Run the following command to create a bash shell in the pod:

   $ kubectl --namespace <namespace> exec -it -c <containername> <podname> -- bash
   

   For example:

   $ kubectl --namespace oudns exec -it -c oud-ds-rs oud-ds-rs-0 -- bash
   

   This will take you into the pod:

   [oracle@oud-ds-rs-0 oracle]$
   

2. From the prompt, use the dsreplication command to check the status of your replication group:

   $ cd /u01/oracle/user_projects/oud-ds-rs-0/OUD/bin
   
   $ ./dsreplication status --trustAll \
   --hostname oud-ds-rs-0 --port 1444 --adminUID admin \
   --dataToDisplay compat-view --dataToDisplay rs-connections
   

   The output will look similar to the following. Enter credentials where prompted:

   >>>> Specify Oracle Unified Directory LDAP connection parameters
       
   Password for user 'admin':
       
   Establishing connections and reading configuration ..... Done.
       
   dc=example,dc=com - Replication Enabled
   =======================================
       
   Server               : Entries : M.C. [1] : A.O.M.C. [2] : Port [3] : Encryption [4] : Trust [5] : U.C. [6] : Status [7] : ChangeLog [8] : Group ID [9] : Connected To [10]
   ---------------------:---------:----------:--------------:----------:----------------:-----------:----------:------------:---------------:--------------:-------------------------------
   oud-ds-rs-0:1444     : 1       : 0        : 0            : 1898     : Disabled       : Trusted   : --       : Normal     : Enabled       : 1            : oud-ds-rs-0:1898
                        :         :          :              :          :                :           :          :            :               :              : (GID=1)
   oud-ds-rs-1:1444     : 1       : 0        : 0            : 1898     : Disabled       : Trusted   : --       : Normal     : Enabled       : 1            : oud-ds-rs-1:1898
                        :         :          :              :          :                :           :          :            :               :              : (GID=1)
   oud-ds-rs-2:1444     : 1       : 0        : 0            : 1898     : Disabled       : Trusted   : --       : Normal     : Enabled       : 1            : oud-ds-rs-2:1898
                        :         :          :              :          :                :           :          :            :               :              : (GID=1)
       
   Replication Server [11]        : RS #1 : RS #2 : RS #3
   -------------------------------:-------:-------:------
   oud-ds-rs-0:1898               : --    : Yes   : Yes
   (#1)                           :       :       :
   oud-ds-rs-1:1898               : Yes   : --    : Yes
   (#2)                           :       :       :
   oud-ds-rs-2:1898               : Yes   : Yes   : --
   (#3)                           :       :       :
       
   [1] The number of changes that are still missing on this element (and that have been applied to at least one other server).
   [2] Age of oldest missing change: the age (in seconds) of the oldest change that has not yet arrived on this element.
   [3] The replication port used to communicate between the servers whose contents are being replicated.
   [4] Whether the replication communication initiated by this element is encrypted or not.
   [5] Whether the directory server is trusted or not. Updates coming from an untrusted server are discarded and not propagated.
   [6] The number of untrusted changes. These are changes generated on this server while it is untrusted. Those changes are not propagated to the rest of the topology but are effective on the untrusted server.
   [7] The status of the replication on this element.
   [8] Whether the external change log is enabled for the base DN on this server or not.
   [9] The ID of the replication group to which the server belongs.
   [10] The replication server this server is connected to with its group ID between brackets.
   [11] This table represents the connections between the replication servers.  The headers of the columns use a number as identifier for each replication server.  See the values of the first column to identify the corresponding replication server for each number.
   

3. Type exit to exit the pod.

Using kubectl commands

1. The dsreplication status command can be invoked using the following kubectl command:

   $ kubectl --namespace <namespace> exec -it -c <containername> <podname> -- \
   /u01/oracle/user_projects/<OUD Instance/Pod Name>/OUD/bin/dsreplication status \
   --trustAll --hostname <OUD Instance/Pod Name> --port 1444 --adminUID admin \
   --dataToDisplay compat-view --dataToDisplay rs-connections
   

   For example:

   $ kubectl --namespace oudns exec -it -c oud-ds-rs oud-ds-rs-0 -- \
   /u01/oracle/user_projects/oud-ds-rs-0/OUD/bin/dsreplication status \
   --trustAll --hostname oud-ds-rs-0 --port 1444 --adminUID admin \
   --dataToDisplay compat-view --dataToDisplay rs-connections
   

   The output will be the same as per Run dresplication inside the pod.

Verify the cronjob

1. Run the following command to make sure the cronjob is created:

   $ kubectl get cronjob -n <namespace>
   

   For example:

   $ kubectl get cronjob -n oudns
   

   The output will look similar to the following:

   NAME               SCHEDULE       SUSPEND   ACTIVE   LAST SCHEDULE   AGE
   oud-pod-cron-job   */30 * * * *   False     0        5m18s           19m
   

2. Run the following command to make sure the job(s) is created:

   $ kubectl get job -n <namespace> -o wide
   

   For example:

   $ kubectl get job -n oudns -o wide
   

   The output will look similar to the following:

   NAME                        COMPLETIONS   DURATION   AGE     CONTAINERS        IMAGES                   SELECTOR
   oud-pod-cron-job-27586680   1/1           1s         5m36s   cron-kubectl      bitnami/kubectl:1.21.6   controller-uid=700ab9f7-6094-488a-854d-f1b914de5f61
   

Disabling the cronjob

If you need to disable the job, for example if maintenance needs to be performed on the node, you can disable the job as follows:

1. Run the following command to edit the cronjob:

   $ kubectl edit cronjob pod-cron-job -n <namespace>
   

   For example:

   $ kubectl edit cronjob oud-pod-cron-job -n oudns
   

   Note: This opens an edit session for the cronjob where parameters can be changed using standard vi commands.

2. In the edit session search for suspend and change the vaule from false to true:

   ...
   schedule: '*/30 * * * *'
   successfulJobsHistoryLimit: 3
   suspend: true
   ...
   

3. Save the file and exit (wq!).

4. Run the following to make sure the cronjob is suspended:

   $ kubectl get cronjob -n <namespace>
   

   For example:

   $ kubectl get cronjob -n oudns
   

   The output will look similar to the following:

   NAME               SCHEDULE       SUSPEND   ACTIVE   LAST SCHEDULE   AGE
   oud-pod-cron-job   */30 * * * *   True      0        7m47s           21m
   

5. To enable the cronjob again, repeat the above steps and set suspend to false.

Ingress Configuration

With an OUD instance now deployed you are now ready to configure an ingress controller to direct traffic to OUD as per Configure an ingress for an OUD.

Undeploy an OUD deployment

Delete the OUD deployment

1. Find the deployment release name:

   $ helm --namespace <namespace> list
   

   For example:

   $ helm --namespace oudns list
   

   The output will look similar to the following:

   NAME            NAMESPACE       REVISION        UPDATED                                    STATUS          CHART           APP VERSION
   oud-ds-rs       oudns           1               2022-07-11 09:46:17.613632382 +0000 UTC    deployed        oud-ds-rs-0.2   12.2.1.4.0
   

2. Delete the deployment using the following command:

   $ helm uninstall --namespace <namespace> <release>
   

   For example:

   $ helm uninstall --namespace oudns oud-ds-rs
   release "oud-ds-rs" uninstalled
   

3. Run the following command to view the status:

   $ kubectl --namespace oudns get pod,service,secret,pv,pvc,ingress -o wide
   

   Initially the pods and persistent volume (PV) and persistent volume claim (PVC) will move to a Terminating status:

   NAME              READY   STATUS        RESTARTS   AGE   IP             NODE            NOMINATED NODE   READINESS GATES
   
   pod/oud-ds-rs-0   1/1     Terminating   0          24m   10.244.1.180   <Worker Node>   <none>           <none>
   pod/oud-ds-rs-1   1/1     Terminating   0          18m   10.244.1.181   <Worker Node>   <none>           <none>
   pod/oud-ds-rs-2   1/1     Terminating   0          12m   10.244.1.182   <Worker Node>   <none>           <none>
   
   NAME                         TYPE                                  DATA   AGE
   secret/default-token-msmmd   kubernetes.io/service-account-token   3      3d20h
   secret/dockercred            kubernetes.io/dockerconfigjson        1      3d20h
   secret/orclcred              kubernetes.io/dockerconfigjson        1      3d20h
   
   NAME                                 CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS        CLAIM                       STORAGECLASS        REASON   AGE    VOLUMEMODE
   persistentvolume/oud-ds-rs-pv        20Gi       RWX            Delete           Terminating   oudns/oud-ds-rs-pvc         manual                       24m    Filesystem
   
   NAME                                  STATUS        VOLUME         CAPACITY   ACCESS MODES   STORAGECLASS   AGE   VOLUMEMODE
   persistentvolumeclaim/oud-ds-rs-pvc   Terminating   oud-ds-rs-pv   20Gi       RWX            manual         24m   Filesystem
   

   Run the command again until the pods, PV and PVC disappear.

Delete the persistent volume contents

1. Delete the contents of the oud_user_projects directory in the persistent volume:

   $ cd <persistent_volume>/oud_user_projects
   $ rm -rf *
   

   For example:

   $ cd /scratch/shared/oud_user_projects
   $ rm -rf *
   

Appendix: Configuration Parameters

The following table lists the configurable parameters of the oud-ds-rs chart and their default values.