https://github.com/erseco/devops_recruiting

https://github.com/erseco/devops_recruiting

Last synced: about 7 hours ago
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• Host: GitHub
• URL: https://github.com/erseco/devops_recruiting
• Owner: erseco
• License: gpl-3.0
• Created: 2018-11-20T14:56:42.000Z (almost 6 years ago)
• Default Branch: master
• Last Pushed: 2024-02-13T10:49:59.000Z (9 months ago)
• Last Synced: 2024-02-13T12:56:22.639Z (9 months ago)
• Language: Python
• Size: 19.5 KB
• Stars: 2
• Watchers: 10
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# exolever devops recruiting exercises

>It is not mandatory to finish all these exercises, but we would appreciate it if you explain how you solved them. Do a PR with your answers.

### 1. Check this configuration file and answer the questions

```

 http {

    default_type  application/octet-stream;

    include       /etc/nginx/mime.types;

  server {

      location ~* ^/.+/backup/$ {

          deny all;

      }

      location ~ ^/calendar/(.*)  {

          set $calendar_app_server exo-calendar:8891;

          proxy_pass         http://$calendar_app_server/$1$is_args$args;

          proxy_http_version 1.1;

          proxy_set_header   Upgrade $http_upgrade;

          proxy_set_header   Connection $connection_upgrade;

          proxy_set_header   Host $host;

          proxy_set_header   X-Real-IP $remote_addr;

          proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for

          proxy_set_header   X-Forwarded-Host $server_name;

          add_header         X-Bender "Bite my shiny metal ass";

      }

      location / {

          proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

          proxy_set_header Host $http_host;

          proxy_redirect off;

          proxy_buffer_size 128k;

          proxy_buffers	4 256k;

          proxy_busy_buffers_size	256k;

          # *application* server like Unicorn/Rainbows! serve static files.

          if (!-f $request_filename) {

              proxy_pass http://exolever_app_server;

              break;

          }

      }

      gzip             on;

      gzip_min_length  1000;

      gzip_proxied     expired no-cache no-store private auth;

      gzip_types       text/plain text/html text/xml text/css text/javascript application/xml application/xhtml+xml;

  }

```

- What is this file?

- There are errors on it? Which ones?

- If you found errors, how did you found it?

- What is doing the section: 

  ```

      location ~* ^/.+/backup/$ {

          deny all;

      }

  ```

- What is doing this line? `set $calendar_app_server exo-calendar:8891`

### 2. Create a REST service (choose your favourite language, but you cannot use Flask) with three entrypoints, we will test it with this sentences

- `curl -X POST -H "Content-Type: application/json" -d '{"name":"your name"}' localhost:8001/hello/` must return your name

- `curl -X GET localhost:8001/hour/japan/` must return the current time in Tokyo

- `curl -X GET localhost:8001/weather/japan/` must return the current temperature in Tokyo, you should use a public forecast API.

### 3. Write a Dockerfile to pack the previous REST service in a Docker container, try to create it as smallest as you can.

### 4. Check the next Dockerfile and answer the questions:

```

FROM node:11-alpine AS base

LABEL maintainer="Bender the Offender "

WORKDIR /app

# Configure timezone to Europe/Madrid (required by tests)

RUN apt-get install nodejs

# Define registry to improve porformance

RUN npm config set registry https://registry.npmjs.org/

COPY package.json npm-shrinkwrap.json .

RUN npm install

COPY . .

CMD [ "npm", "start" ]

```

- What is wrong in this Dockerfile

- There are missing parts, can you complete it?

- Why are we using `COPY` twice?

- Upload it to Docker Hub

### 4. Check this repo, there is a `python_app` folder. Modify the code to allow printing the weather of every city in the list. Try to do TDD also.

### 5. Which ports are open in `www.exolever.com`? How did you check it?

### 6. Which is the latest version of the Docker compose file reference?

### 7. Create a bash script that asks the user for a "name" and call your webservice. Use colors if you can!

### 8. OPTIONAL Build the container of the question 3 with travis-ci

### 9. OPTIONAL Create a docker-compose.yml to run the previous container

### 10. OPTIONAL What is true regarding the following code?

```

async function getList () {

  return functionThatReturnsAPromise()

}

async function main () {

  const list = await getList()

  // ...

}

main()

```

- a) It will fail to execute as the async keyword is incorrectly used

- b) This code is correct and does not need to be improved

- c) The code will execute but the await function call will never return as the promises are not properly chained

- d) The code will execute correctly but the first async keyword should be removed as the function getList() already returns a promise