This is a test case of DevOps role from the Snappmarket. I share it here with my answer.

1- Create a simple node.js application for printing current timestamp and dockerize it (Dockerfile + docker compose).

2- Use nginx for web server behind the application (Dockerfile + docker compose)

3- Create ha proxy config file with these criteria: star:

1. one listen block to passing mysql connections to the desired ip/port
2. one frontend block to receive http requests on port 80
3. one backend block with 2 servers
4. use basic http authentication for accessing the backend
5. Dockerize ha proxy

4- Create a pipeline with Gitlab CI to running, validating and reloading ha proxy config file automatically when merging to develop branch.

5- It's a bash script test case that asked you to understand it to solve some issue on its.

1-4: I solved them into the files' code. (you can find it into this repo). Also, because I didn't have enough time, I forced to summarize something(Sorry for that).

5: All Answers of bash script test case(two purposes):

• 1- Purpose of this code: We have printed all regular files listed in /tmp directory that modified greater than 24 hours ago and contains *.dophin.temp pattern(extension), then this list sent to adddate() function, afterward this function add date $time to this list and print it.
• 2- All files in the / directory that they are modified greater than 24 hours ago and they have *.dophin.temp pattern(extension) sent to xargs for print in echo.
• 3- Problems of the Test:
  1. "For loops" over "find output" are fragile, it's better to use "find -exec" or a "while read" loop.(line: 9)
  2. We must use double quote to prevent globbing(Security issue) and word splitting.(lines: 11, 12)
  3. It's better to use -print0/-0 or -exec + to allow for non-alphanumeric filenames.(line: 15)
  4. It's better to use find instead of ls to handle non-alphanumeric filenames.(line: 12)
• 4- Rewrite code(another way):

#!/bin/bash
adddate() {
  while read -r line
  do
      echo "$(date) $line"
  done
}

while read -r file
 do
 echo "$file"
 find "$file" -mindepth 1 -maxdepth 1 -printf '%f\n' | adddate >> /tmp/clean.log
 done < "$( find /tmp -type f -mtime +0 -name '*.dolphin.temp' )"

find / -print0/-0 -type f -mtime +0 -name '*.dolphin.temp' | xargs echo
exit 0