How to fix ORA-28368: cannot auto-create wallet

by A. J.

How to fix ORA-28368: cannot auto-create wallet

While starting the database or configuring TDE (Transparent Data Encryption) which comes under Oracle Advance Security. TDE is Tablespace encryption which saves the tablespace data from unauthorized access. Transparent Data Encryption only works on tablespace level not with database object level or Tables. You might have seen ora-26368:cannot auto-create wallet. There are easy fixes for this error. ORA-28368 mostly related to oracle wallet Parameter and wallet path mismatch. Oracle wallet is the option where the oracle database stores the encryption key.

Full error

SQL> startup
ORACLE instance started.

Total System Global Area 1761607680 bytes
Fixed Size 2925360 bytes
Variable Size 536874192 bytes
Database Buffers 1207959552 bytes
Redo Buffers 13848576 bytes
Database mounted.
Database opened.
SQL> alter system set encryption key identified by “oracle”;
alter system set encryption key identified by “oracle”
*
ERROR at line 1:
ORA-28368: cannot auto-create wallet

Solutions

1. Check the path of the wallet in sqlnet.ora path should exist.

2. Extra space in starting of “ENCRYPTION_WALLET_LOCATION” in sqlnet.ora

3. Wallet file ewallet.p12 or ewallet.sso have wrong permission. It should be “chmod 600 ewallet.p12”

AWS Services and their Azure alternatives

by A. J.

AWS vs Azure Service Names

In this article, I have listed AWS services and their Azure alternatives with Name. AWS and Azure are becoming the most vital choice while building cloud infrastructure. I know most of the AWS services and working with them and trying to develop knowledge about Azure services which can be used as alternatives to AWS services. For example, people ask what is the s3 equivalent in azure? Mean to ask if I want to stage my files like AWS s3 which Azure service can be used.

AWS Services and their Azure Alternatives

Service Name	Amazon AWS	Microsoft Azure
Cloud VM/ Compute	AWS EC2	Virtual Machine
PaaS	Elastic Beanstalk	Apps Service
PaaS	Elastic Beanstalk	Cloud service
Compute	AWS Lambda	Azure Function
Filestore / File staging	AWS S3	Azure Storage
Directory Service	AWS Cognito	Azure Active Directory
Notification	AWS SNS, SQS	Event Grid, Service Bus
Analytics	AWS Kinesis, Athena	Azure Stream Analytics, Event Hub
Developer tools	AWS Developer tools	Application Insights
API	AWS API Gateway	API Management, Azure Functions, Proxies
Block storage	AWS EBS	Azure Blob Storage
Relational Database Service	AWS Relational Database Service	Azure SQL Database
Big Data/ Hadoop	AWS EMR	Azure HDInsight
Monitoring / Alarm	AWS cloud watch	azure monitor
File Archival	AWS Glacier	Azure Archive storage
CDN (Content Delivery Network)	AWS Cloudfront	Delivery Network
File System	AWS EFS	Azure Files
Kubernatice	AWS EKS	Kubernetes services
Managed WareHouse	AWS Redshift	SQL WareHouse
Orchestration	AWS Step Functions	Azure Logic Apps
Docker/Container	AWS ECS	Azure Container Services
video analysis	Amazon Rekognition	Azure Cognitive Services
IoT	AWS IoT	Azure IoT
ETL (Extraction Transformation and Loading )	AWS glue	azure data catalog
DNS	AWS Route 53	Azure DNS
Virtual Network	AWS VPC	Azure VNet
Blockchain	Amazon Managed Blockchain	Azure Blockchain Service
Machine Learning	Amazon SageMaker Amazon CodeGuru Amazon Comprehend Amazon Forecast Amazon Fraud Detector Amazon Kendra Amazon Lex Amazon Machine Learning Amazon Personalize Amazon Polly Amazon Rekognition Amazon Textract Amazon Transcribe Amazon Translate AWS DeepLens AWS DeepRacer Amazon Augmented AI AWS DeepComposer	Azure Machine Learning services
Billing	Per Hour	Per Minute

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How to Manage AWS S3 Bucket with AWS CLI

by A. J.

How to Manage AWS S3 Bucket with AWS CLI (Command Line)

In this article, we are going to see how we can manage the s3 bucket with AWS s3 CLI commands. AWS s3 CLI command is easy really useful in the case of automation. Using AWS s3 cli you can mange S3 bucket effectively without login to AWS console.

Prerequisites

AWS Access Key ID
AWS Secret Access Key
AWS CLI should be configured on your laptop or desktop. You can see my article for the AWS CLI configuration.

List of Commands to manage AWS s3

#1. Create AWS s3 bucket

aws s3api create-bucket --bucket thedbadminbuk --region us-east-1
{
    "Location": "/thedbadminbuk"
}

#2. List all the S3 bucket which are already created

aws s3 ls
2020-04-13 15:22:48 abhitest1410
2020-04-13 18:00:54 thedbadminbuk

#3. List all the bucket data

aws s3 ls s3://thedbadminbuk

#4. List all the data inside the directory inside the bucket

aws s3 ls s3://thedbadminbuk --recursive

#5. Copy file to s3 bucket

aws s3 cp server.txt s3://thedbadminbuk
upload: ./server.txt to s3://thedbadminbuk/server.txt

#6. Copy file to s3 bucket to another s3 bucket

aws s3 cp s3://thedbadminbuk123/server.txt s3://thedbadminbuk
upload: s3://thedbadminbuk123/server.txt to s3://thedbadminbuk/server.txt

#7. Copy Directory to S3 bucket

aws s3 cp Desktop s3://thedbadminbuk --recursive

#8. Copy Directory from one S3 bucket to another s3 bucket

aws s3 cp s3://thedbadminbuk123/Desktop s3://thedbadminbuk --recursive

#9. Move file from local file system to s3 bucket

aws s3 mv server.txt s3://thedbadminbuk/client.txt

#10. Move file from one s3 bucket to another s3 bucket

aws s3 mv s3://thedbadminbuk/server.txt s3://thedbadminbuk/client.txt
aws s3 mv s3://thedbadminbuk/client.txt s3://thedbadminbuk/client.txt

#11. Move file from s3 bucket to local file system

aws s3 mv s3://thedbadminbuk/client.txt /tmp
move: s3://thedbadminbuk/client.txt to ../../tmp/client.txt

#12. Delete file from s3 bucket

aws s3 rm s3://thedbadminbuk/client.txt
delete: s3://thedbadminbuk/client.txt

#13. Delete Directory from s3 bucket

aws s3 rm s3://thedbadminbuk/Desktop
delete: s3://thedbadminbuk/Desktop

#14. Sync file form local file system to s3 bucket

aws s3 sync Desktop s3://thedbadminbuk/

#15. Sync from s3 bucket to the local folder

aws s3 sync s3://thedbadminbuk/Desktop Desktop

#16. Presign URL for any S3 bucket objects. It will give you an https link to access the object from the browser or can embed it into the code. Like jpeg file etc.

aws s3 presign s3://thedbadminbuk/server.txt
https://thedbadminbuk.s3.amazonaws.com/server.txt?AWSAccessKeyId=AKIA5Q6SWIBFKZURW2DX&Expires=1586786199&Signature=qK5wPSzykmQB1tJjQLMKrf8vnys%3D

#17. Presign URL with expires value. It means presign URL will expire in 600 seconds.

aws s3 presign s3://thedbadminbuk/server.txt --expires-in 600
https://thedbadminbuk.s3.amazonaws.com/server.txt?AWSAccessKeyId=AKIA5Q6SWIBFKZURW2DX&Expires=1586783700&Signature=nMqqEHfcxu1HUbg0%2BWnp7sdSwp0%3D

#18. Delete s3 bucket

➜  Desktop aws s3 rb s3://thedbadminbuk
remove_bucket failed: s3://thedbadminbuk An error occurred (BucketNotEmpty) when calling the DeleteBucket operation: The bucket you tried to delete is not empty


➜  Desktop aws s3 rb s3://thedbadminbuk --force
delete: s3://thedbadminbuk/551222XXXXXXXXXX.PDF
delete: s3://thedbadminbuk/Old Desktop/Screenshot.png

#19. Check bucket file size

➜  ~ aws s3 ls s3://thedbadminbuk --recursive  --human-readable
2020-04-13 18:40:12   10.0 KiB .DS_Store
2020-04-13 18:40:12    0 Bytes .localized
2020-04-13 18:40:12  193.2 KiB 5523XXXXXXXXXX68_16-03-2020.PDF
2020-04-13 18:40:28  162.7 KiB Old Desktop/Screenshot 2020-03-29 at 5.56.10 PM.png
2020-04-13 18:40:28  160.8 KiB Old Desktop/Screenshot 2020-03-29 at 5.56.57 PM.png
2020-04-13 18:40:12  164.9 KiB Old Desktop/Screenshot 2020-03-29 at 6.49.44 PM.png
2020-04-13 18:40:12  174.9 KiB Old Desktop/Screenshot 2020-03-29 at 6.49.57 PM.png
2020-04-13 18:40:14   66.4 KiB Old Desktop/Screenshot 2020-04-03 at 3.21.08 PM.png
2020-04-13 18:40:12  112.3 KiB Old Desktop/Screenshot 2020-04-04 at 11.19.30 PM.png
2020-04-13 18:40:12   98.7 KiB Old Desktop/Screenshot 2020-04-06 at 1.31.14 AM.png
2020-04-13 18:40:12  102.6 KiB Old Desktop/Screenshot 2020-04-06 at 1.44.48 AM.png
2020-04-13 18:40:12  104.2 KiB Old Desktop/Screenshot 2020-04-06 at 1.46.23 AM.png
2020-04-13 18:40:12  115.4 KiB Old Desktop/Screenshot 2020-04-06 at 4.38.17 PM.png
2020-04-13 18:40:13    3.7 KiB Old Desktop/Screenshot 2020-04-10 at 10.49.35 AM.png

#20. Total s3 Bucket size

➜  ~ aws s3 ls s3://thedbadminbuk --recursive  --human-readable --summarize
2020-04-13 18:40:12  193.2 KiB 5523XXXXX.PDF
2020-04-13 18:40:28  162.7 KiB Old Desktop/Screenshot10 PM.png
2020-04-13 18:40:28  160.8 KiB Old Desktop/Screenshot57 PM.png
2020-04-13 18:40:12  164.9 KiB Old Desktop/Screensho44 PM.png
2020-04-13 18:40:12  174.9 KiB Old Desktop/ScreenPM.png
2020-04-13 18:40:14   66.4 KiB Old Desktop/Scrpng
2020-04-13 18:40:27   85.1 KiB psql/4.png
2020-04-13 18:40:27  192.9 KiB psql/5.png
2020-04-13 18:40:27  107.9 KiB psql/6.png
2020-04-13 18:40:27  152.3 KiB psql/7.png
2020-04-13 18:40:27   72.0 KiB psql/8.png
2020-04-13 18:40:28   94.0 KiB psql/9.png
2020-04-13 18:40:28    0 Bytes test123
2020-04-13 18:40:28   59 Bytes todo.txt

Total Objects: 117
   Total Size: 17.8 MiB

#21. Exclude file while copy

aws s3  cp  ~/thedbadmin s3://thedbadminbuk/  --recursive --exclude ".ssh/*"
aws s3  cp ~/thedbadmin  s3://thedbadminbuk/  --recursive  --exclude   "thedb*.txt"

#22. Include and exclude file while file copy.

aws s3 cp ~/thedbadmin s3://thedbadminbuk/ --recursive --exclude "*" --include "*.bash"
aws s3 cp ~/thedbadmin s3://thedbadminbuk/ --recursive --exclude "*" --include "*.sh" --include "*.bash"

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How to connect PostgreSQL Database from PgAdmin

by A. J.

How to connect PostgreSQL Database from PgAdmin

In this article, we are going to see how we can connect to the PostgreSQL database from pgadmin. Its a GUI tool to manage and administer the PostgreSQL database. Using pgadmin, you can create and monitor PostgreSQL databases. You can get the pgadmin from offical website. Before you connect to any database from pgadmin you need valid hostname/AWS RDS endpoint and port. Also, you should have valid database credentials.

Steps to connect to PostgreSQL Database from PGAdmin

#1. Open the pgadmin utility #2. Go to servers right click add server

#3. Enter the Host Name/IP or AWS RDS endpoint name.

#4. Once you have added it successfully. Open and try to access the remote database.

#5. Create a database for testing

#6. Give database name and click on ‘save‘.

#7. Once created successfully it will ve visible under your connection name.

#8. Create a table under the newly created database.

#9. You can see the newly created table under the database ‘thedbadmin’.

I hope you like this article. Please comment if you have any doubt. Like our Facebook page Read more AWS MySQL RDS Database Creation using AWS CLI How to Create MySQL Database with AWS RDS How to connect to AWS MySQL / MariaDB RDS or EC2 database from MySQL WorkBench How to Become Oracle apps DBA? What does DBA mean? 150 Oracle DBA Interview Questions Top 5 Future Technologies for Database Administrators (DBA) to learn in 2020 Top 5 Software Technology Trends in 2020 List

How to create AWS RDS PostgreSQL Database

by A. J.

How to create AWS rds PostgreSQL Database

In this article, we are going to talk about detailed steps to create an AWS Postgres database instance on AWS cloud. Amazon RDS has two options for PostgreSQL. The first one is the normal AWS Postgres RDS database and Another one is aurora PostgreSQL. AWS Postgres gives you a lot of performance gain and HA options comparing with the normal data center (DC) database. You can get AWS Postgres with few steps. I have mentioned all possible details in the post about AWS PostgreSQL. If you need any AWS PostgreSQL pricing details you can open the AWS calculator portal and can get details about estimated the cost.

In case if you have any question let me know my comments. Let’s start creating an AWS PostgreSQL RDS database instance.

1# Login to AWS console and Search for ‘RDS‘.

#2. Click on create on Database

#3. Select PostgreSQL .

#4. Select the database template. In my case, I have selected ‘Free tier’ you can select ‘Production’ or ‘Dev/Test‘ according to your requirement. Production and Dev/test will not be free from the day one it will be chargeable.

#5. Give some meaningful database name and Master database username with password.

#6. I have selected the free database classes which come with the free tier.

#7. Based on your database storage needs to select the ‘Allocated space’.

#8. If your database is business-critical you can choose a Multi-Availability Zone for database high availability.

#9. Chose the default VPC. If you are configuring it for Production or development chose the appropriate VPC using the dropdown button.

[su_box title=”IMP Note for Additional connectivity configuration” box_color=”#fe2227″ title_color=”#101112″]In case if you like to access the database from your laptop/Desktop. Select the option ‘Publicly Accessible‘ to yes.[/su_box]

#10. Chose the option according to your application and the AWS ecosystem setup.

#11. To enable Cloudwatch logs or backup you can configure ‘Additional configuration‘.

#12. Click on ‘Create Database‘

#13. It will take a few minutes to create database.

#14. You can view the database credentials after clicking on ‘View credentials details‘ .

#15. You will see this message once your database is ready for action.

Please comment if you have any doubt. Like our Facebook page

How to Become Oracle apps DBA?
What does DBA mean?
150 Oracle DBA Interview Questions
Top 5 Future Technologies for Database Administrators (DBA) to learn in 2020
Top 5 Software Technology Trends in 2020 List

Convert pem to ppk

by A. J.

Convert pem to ppk

In this article, we will see how we can convert pem to ppk easily with few clicks. Whenever we create an AWS EC2 machine and want to access it by putty from a windows laptop or desktop. We need to convert our pem key to ppk key so that putty can use that private key and allow it to connect. There many ways to convert pem to ppk. I really like PuTTyGen because it’s easy and straight forward.

Prerequisites

You need putty installed on your windows system. You can see my following post for putty installation.

How to Install PuTTy on Window

#1. Go to the Windows search option and look for ‘PuttyGen‘ and open it.

#2. Got to ‘Conversions‘ and ‘Import key‘

#3. Now click ‘Save private key‘ and save the file in ppk format.

And click ‘Yes’

#4. Give some meaningful name to the file.

#5. Once you have ppk private key file load into to ‘putty / Connection/ SSH / Auth’ and give the path of ppk file.

#6. Give the AWS s3 endpoint name or public IP in ‘PuTTy / Session / Logging’ and you are done !!!

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