OWLS-76347 New sample scripts to manage DB service and RCU Schema

[anpanigr]

Create a new script directory to manage Oracle DB and RCU schema. Following convenient scripts are added into a new directory (create-rcu-schema) under wblogic-kubernetes-operator/kubernetes/samples/scripts

a. start-db-service.sh
b. stop-db-service.sh
c. create-rcu-schema.sh
d. drop-rcu-schema.sh

User can invoke the requited scripts to before invoking create-domain.sh in create-fmw-infrastructure-domain directory as a per-requisite. No need to copy-n-paste the yaml file/script from the user guide to have a OOTB experience with FMW Infrastructure Domain

[rosemarymarano]

some edits

[rosemarymarano]

how to create a Oracle DB -> how to create an Oracle DB
on Kubernetes clusterand -> on a Kubernetes cluster and
by Fusion Middleware domain. -> by a Fusion Middleware domain.

[anpanigr]

Modify the doc as per suggestion

[anpanigr]

All the JRF Tests are passing on the branch

[markxnelson]

This is confusing, I would turn this into a bulleted list so it is clearer that these are four separate examples

[markxnelson]

on Kubernetes -> in a Kubernetes
and create -> and how to create
schema on the -> schema in the
being used by -> that will be used by

[anpanigr]

Re-worded as follows ...
The sample scripts in this directory demonstrates how to

• start an Oracle DB service in a Kubernetes cluster
• stop an Oracle DB service in a Kubernetes cluster
• create RCU schema in the Oracle DB that will be used by a Fusion Middleware domain.
• delete RCU schema in the Oracle DB used by a Fusion Middleware domain.

[rosemarymarano]

The sample scripts in this directory demonstrates how to:
* Start an Oracle DB service in a Kubernetes cluster.
* Stop an Oracle DB service in a Kubernetes cluster.
* Create the RCU schema in the Oracle DB that will be used by a Fusion Middleware domain.
* Delete the RCU schema in the Oracle DB used by a Fusion Middleware domain.

[markxnelson]

there is no explanation of what this is, what directory it is in, etc. ???

[markxnelson]

surely it needs some parameters or an imagePullSecret or something? you need to authenticate to pull that image don't you?

[anpanigr]

The scripts in the new directory create-rcu-schema is based on the document as described in https://oracle.github.io/weblogic-kubernetes-operator/userguide/managing-domains/fmw-infra/

Here we create convenient scripts out of the above document so that user has not to cut-n-paste the document every-time. I copied the db service/deployment yaml file from this document (which does not have imagePullSecret) The pre-requisite is that customer has to docker login into container-registry.oracle.com and download DB-slim and fmw-infra images. I can put this information on the main page w/o adding imagePullSecret in oradb.yaml

Alternatively I can check the result for docker pull command and provide the suggested action as follows e.g. in start-db-service.sh

ocr_pfx=container-registry.oracle.com
db_image=${ocr_pfx}/database/enterprise:12.2.0.1-slim
docker pull ${db_image}
if [ $? != 0 ]; then
echo "[ERROR] Could not pull ${db_image}";
echo "Please run [ docker login ${ocr_pfx} ] and "
echo "Check-out the db image (if needed)"
exit -1;
fi

[markxnelson]

there are two code blocks right next to each other with no text between them, either combine them, or put some text in between

[markxnelson]

"external" is redunant - nodePorts are always external

[anpanigr]

Remove the word external as follows ....

$ ./start-db-service.sh -h
usage: start-db-service.sh -p [-h]
-p DB Service NodePort (optional)
(default: 30011)
-h Help

[markxnelson]

The script create a -> This script creates an
Namespace is spelled wrong
Credential should not have capial

[anpanigr]

The script creates an Oracle DB Service in default namespace with default credential that comes with the Oracle Database Slim image.

[markxnelson]

remove extra blank line

[markxnelson]

authentication?

[anpanigr]

Now I check the result for docker pull command and provide the suggested action as follows e.g. in start-db-service.sh

ocr_pfx=container-registry.oracle.com
db_image=${ocr_pfx}/database/enterprise:12.2.0.1-slim
docker pull ${db_image}
if [ $? != 0 ]; then
echo "[ERROR] Could not pull ${db_image}";
echo "Please run [ docker login ${ocr_pfx} ] and "
echo "Check-out the db image (if needed)"
exit -1;
fi

[markxnelson]

this is a nit, but the general convention is to use slash as the sed delimiter unless there is some reason to not use it

[markxnelson]

wrong year

[anpanigr]

Modified all the checked-in files with following line

Copyright 2019, Oracle Corporation and/or its affiliates. All rights reserved.

[markxnelson]

the script is called "stop" but you are deleting - seems wrong - rename script?

[anpanigr]

Here I stop the service by internally deleting the kubernate service. Start/Stop Service also complements each other with reverse action.