A Technical I.T./DevOps Blog
Problem scenario
You want to install GraphQL for Python in Linux. What should you do?
Solution
python3 -m venv to_test
cd to_test
source bin/activate
pip3 install graphql-python
pip3 install flask ariadne flask-sqlalchemy flask-cors …
Question
In I.T. what is pipelinization?
Answer / Disambiguation
The configuration, creation, or execution of a repeatable process that involves a series of stages with a start and finish. Another definition of pipelinization would be making a procedure into a controlled stream (for reproducibility for parallel and independent development or parallel and increased throughput of the original process). A final definition would be adopting a manual or automated process by developing a sequence of substeps for a [batch] job to incrementally pass through.
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Continue reading “What is Pipelinization in Technology/Computing?”
Problem scenario
Some updates are essential for security. In some situations a patch to an OS or an application may cause some clients to have problems connecting to the server. The ramifications could apply to middleware or other applications. Is it a best/recommended practice to push an update to a server’s OS or application when other clients or smart phone apps will not be able to be compatible?
Answer
It is not clear.
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Problem scenario
You know that an admission controller in the API server has various stages to process a kubectl command in Kubernetes. You want to know how the API server or relevant admission controller works in the correct sequence. The sequence starts with a request (HTTP POST from a kubectl command) and ends with updating etcd. How does this happen in detail?
Solution
The API server’s process of handling a kubectl command is very similar to what are called “admission controller phases.”*
It is not clear what is the difference (if there is any).
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Problem scenario
You have read about “branching by abstraction,” but you do not know what it means. You read that it is ideal when the coding you are doing cannot be done incrementally. How do you “branch by abstraction”?
Solution
It is a method of trunk-based development; instead of using a branch, you commit to the trunk (or main) branch of your repository.
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Continue reading “What Does “Branch by Abstraction” Entail?”
Problem scenario
You are not sure if Log4j is acceptable to use. It is a best/recommended practice to use Log4j?
Answer
Maybe.
Log4j has been well-adopted by many of the most trusted companies in the I.T. industry. According to cybersecuritydive.com “Fortinet, IBM, Microsoft, Red Hat, Salesforce, and Siemens” use(d) Log4j. Log4j has been vulnerable since 2013 (according to this external website).
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Continue reading “Is It a Best/Recommended Practice to Use Log4j?”
Problem scenario
There are sources that recommend database normalization as a best practice for relational databases. Is it always a best practice to normalize databases?
Answer
There is no clear answer as the sources vary.
A heavily voted-up answer on StackOverflow says that denormalization for OLAP performance is something to be avoided. We find recognition of this “best practice” on a venerated engineering blog:
Keeping data normalized is considered a best practice in MySQL.
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Continue reading “Is It a Best Practice to Normalize a SQL Database?”
Problem scenario
You are familiar with two different software tools called Yarn. You are not sure what they do or how they are different.
Solution / Yarn Disambiguation
There is a package manager that has some project manager functionalities called yarn. It often works with JavaScript.
This tool has an icon of a one-line drawing of a cat; the original Yarn website had other cat imagery,
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Problem scenario
You want to test your application. You are considering using mock/fake data. But you are concerned that the tests will be insufficient. Is it a best practice to test with production data?
Answer
It depends. We prefer the term “recommended practice” because of questions like these.
Some sources recommend using production data:
…many production issues are due the lack of real(istic) test data…
To ensure software of the highest quality possible,
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Continue reading “Is It a Recommended Practice to Use Production Data when Testing Software?”
Prerequisite
Install make. If you need assistance, see this posting.
Procedures
Run these three commands:
curl https://github.com/gruntwork-io/terragrunt/releases/download/v0.35.18/terragrunt_linux_arm64 –output /tmp/terragrunt_linux_arm64
sudo mv -i /tmp/terragrunt_linux_arm64 /bin/terragrunt
sudo chmod u+x /bin/terragrunt …
Continue reading “How Do You Install and Configure Terragrunt on a Linux Machine?”