A Technical I.T./DevOps Blog
Problem scenario
You want to use Helm to manage Kubernetes applications. Helm helps you with packages for changes to Kubernetes (in ways that are similar to yum or apt). Helm uses what are call Charts (.yaml files) that enable you to do more with Kubernetes with less trouble. Helm consists of these two things: a CLI tool and a server component that runs as a pod in a Kubernetes cluster (page 531 of Kubernetes in Action by Luksa).
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TLDR: The canonical advice we give job seekers in I.T. is to develop testing-coding skills despite the fact that there are limitations to such artificial tests.
Full Length Article
How should a prospective I.T. employee be assessed? Ostensibly CodeFights, Codebyte, Codility, Coderpad, Devskiller, HackerRank, LeetCode, TestDome, and other coding ability test websites can help job seekers with limited professional experience yet considerable skills and abilities can prove himself or herself.
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Continue reading “The Mismeasure of a Professional Candidate?”
Problem scenario
You want to restart Windows Management Instrumentation services using PowerShell. What command will cycle WMI in PowerShell?
Solution
Open PowerShell as an Administrator. Run this command: restart-service winmgmt
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Continue reading “How Do You Restart WMI Services with PowerShell?”
Problem scenario
You know of automated software that screens resumes without human oversight. You know your resume could be in a database and later retrieved if key words are matched. You want to customize your resume for the perfect job. The ladders.com says that humans often do not read resumes but robots do. What do you to to tailor your resume for the processes that affect getting an interview?
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Continue reading “How Do You Get Your Resume Passed Resume Scanning Programs for an Interview?”
Problem scenario
You want to create new processes with the multiprocessing library in Python. What should you do?
Solution
Run this program:
“”” In a duplicate terminal window, run this command before, during and after you run the pyhon script: sudo ps -ef | grep python | wc -l
The integer that returns will go up by two showing a new processes have been created when the program is still running. …
Problem scenario
You want to bypass Docker and configure the cgroups directly. You want new Docker containers to be governed by these customized settings. What should you do?
Solution
You may not want to bypass Docker for your cgroup modifications. You should read about the libcontainers. By default Docker uses libcontainers for granular configuration changes along the lines of modifying cgroups settings.
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Problem scenario
You want to play TicTacToe. You have a Golang compiler installed. What should you do?
Solution
Prerequisites
This assumes that you have installed Go. If you need assistance, see this posting.
Procedures
1. Name this program tictactoe.go.
package main
import (
“strings”
“bufio”
“fmt”
“os”
)
func mapper(letter string) int{
if strings.TrimRight(letter, …
Continue reading “How Do You Write a Tic-Tac-Toe Program in Golang?”
Problem scenario
You are using AKS (Azure Kubernetes Service). You have a cluster that you want to have more nodes. (Please do not confuse nodes with pods; see this posting if you are not sure about the difference.) What should you do?
Solution
You need to know the name of the cluster and the resource group it is in.
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Continue reading “How Do You Scale Out the Nodes of an AKS Cluster?”
Question
You have noticed that Docker and Jenkins are regularly used together. Why is this?
Answer
1. The docker build command produces one artifact. Jenkins lends itself to well-defined tasks.
2. The logic and dependencies of the build can usually be completely contained in the Dockerfile (page 20 of Docker Up and Running). Simple lines of text can standardize many aspects of a given build (e.g.,
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Question
What is cargo cult systems engineering?
Answer
Cargo cult systems engineering: vestige stanzas are included in a given configuration file for no functional benefit. Such irrelevant, or environment-inappropriate, stanzas exist either because the systems engineer was not given sufficient time to analyze every line of configuration or because the systems engineer failed to understand why the lines were included in the template (or working system) he/she copied from.
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