What Is Advertised Kafka Address?

Let’s start with the basics. After successfully starting a Redpanda or Apache Kafka® cluster, you want to stream data into it right away. No matter what tool and language you chose, you will immediately be asked for a list of bootstrap servers for your client to connect to it.

This bootstrap server is just for your client to initiate the connection to one of the brokers in the cluster, and then it will provide your client with initial sets of metadata. The metadata tells the client the currently available brokers, and which the leader of each partition is hosted by which brokers so that the client can initiate a direct connection to all brokers individually. The diagram below will give you a better idea.

Host Hack Attempt Detection Using ELK

What Is SIEM?

SIEM stands for Security Information and Event Management. It is a software solution that provides real-time analysis of security alerts generated by network hardware and applications. SIEM collects log data from multiple sources such as network devices, servers, and applications, then correlates and analyzes this data to identify security threats.

SIEM can help organizations improve their security posture by providing a centralized view of security events across the entire IT infrastructure. It allows security analysts to quickly identify and respond to security incidents and provides detailed reports for compliance purposes.

Automating the Creation of Multiple Folders in Google Drive

A teacher may want to create folders in Google Drive for each of their students and share those folders with the students. This can be a tedious task if you have a large number of students but there’s a way to automate the process - you may either use an add-on or write an Apps Script to generate the folder structure.

Students' data in Google Sheets

Prepare the Students’ Data in Google Sheets

We’ve prepared a Google Sheet with the names of students, their corresponding classes and email addresses. The first row of the sheet displays the column titles, while the student data starts from row two onwards.

The folder structure in Google Drive would be as follows - the parent folder would have sub-folders for each class and each class folder would have sub-folders for each student. The student folders would be shared with the student’s email addresses where students can upload their work.

Google Drive Folder Structure

Bulk Create Folders in Google Drive

Install the Document Studio add-on for Google Sheets. Open the spreadsheet with the student data and click on Extensions > Document Studio > Open to launch the add-on.

Create a new workflow inside Document studio, give it a descriptive name like Create Student Folders and click on the Continue button to add a task.

Choose the Google Drive task and then select Create Folder from the dropdown menu. Next, select the parent folder in Google Drive where the student folders should be created. You may even create folders inside Shared Drives

Google Drive Folder Configuration

For the Subfolder Name field, select the column in the spreadsheet that contains the student names and their class names. Enclose the column titles within double curly braces and they are replaced with the actual values from the spreadsheet.

You can put the {{Email Address}} column in the Editors field to share the student folders with their email addresses automatically when the folder is created in Google Drive.

Now that workflow is ready, choose the Save and Run option to create the folders in Google Drive. The folders would be created and a link to the folder would be placed in the spreadsheet itself. If a folder already exists, the link to the existing folder is placed in the spreadsheet.

Create Multiple Folders in Google Drive in Apps Script

If you prefer to write code, you can use the following Apps Script to create folders in Google Drive for students and share those folders with their email addresses based on data from a Google Sheet.

Go to Google Sheets, and choose Extensions > Apps Script to open the script editor. Create a new script and add the following code:

A. Create a folder in Google Drive only if it doesn’t already exist.

function createFolderIfNotExists(folderName, parentFolder) {
  const folders = parentFolder.getFoldersByName(folderName);
  return folders.hasNext() ? folders.next() : parentFolder.createFolder(folderName);
}

B. Get the student data from the spreadsheet and return an array of objects with the student data.

function getStudentData(sheet) {
  const [header, ...rows] = sheet.getDataRange().getDisplayValues();
  return rows.map((row, rowIndex) => {
    const student = {};
    row.forEach((cell, i) => {
      student[header[i]] = cell;
    });
    return { ...student, rowIndex: rowIndex + 2 };
  });
}

C. Create the folders in Google Drive and share them with the students.

function createStudentFoldersInGoogleDrive() {
  const sheet = SpreadsheetApp.getActiveSheet();
  const studentData = getStudentData(sheet);
  const rootFolder = DriveApp.getRootFolder();
  const parentFolder = createFolderIfNotExists('Classroom', rootFolder);
  for (let i = 0; i < studentData.length; i++) {
    const student = studentData[i];
    const classFolder = createFolderIfNotExists(student['Class'], parentFolder);
    const studentFolder = createFolderIfNotExists(student['Student Name'], classFolder);
    studentFolder.addEditor(student['Email Address']);
    const folderUrl = studentFolder.getUrl();
    sheet.getRange(student['rowIndex'], 5).setValue(folderUrl);
  }
  SpreadsheetApp.flush();
}

You may want to change the column titles and indices in the code to match the ones in your data spreadsheet. Also, you may want to use the Advanced Drive API service to create folders in Shared Drive.

Google Apps Script - Create Folders

Also see: Create Folders in Google Drive for Google Form responses

The Evolution of Incident Management from On-Call to SRE

Incident management has evolved considerably over the last couple of decades. Traditionally having been limited to just an on-call team and an alerting system, today it has evolved to include automated incident response combined with a complex set of SRE workflows.

Importance of Reliability

While the number of active internet users and people consuming digital products has been on the rise for a while, it is actually the combination of increased user expectations and competitive digital experiences that have led organizations to deliver super Reliable products and services. 

How do I get a button to do what it is supposed to do?

The button in question is supposed to calculate the cost of a car rental, from inputs for how many months, how many weeks and how many days.
This is the entire code at the moment:

import tkinter as tk
from datetime import *


# Create a tkinter window
window = tk.Tk()
window.title("Car Rental Service")
window.resizable(True, True)

# Define global variables
rental_cost = 0
rental_duration = 0

def submit_form():
    name = name_entry.get()


# Define functions
def calculate_cost():
      # Extract numeric values from label text
    rental_days_text = rental_label_days.cget('text')
    rental_days = 0
    if any(c.isdigit() for c in rental_days_text):
        rental_days = int(''.join(filter(str.isdigit, rental_days_text)))

    rental_weeks_text = rental_label_weeks.cget('text')
    rental_weeks = 0
    if any(c.isdigit() for c in rental_weeks_text):
        rental_weeks = int(''.join(filter(str.isdigit, rental_weeks_text)))

    rental_months_text = rental_label_months.cget('text')
    rental_months = 0
    if any(c.isdigit() for c in rental_months_text):
        rental_months = int(''.join(filter(str.isdigit, rental_months_text)))

    global rental_cost
    # Calculate rental cost based on duration
    if rental_days >= 1:
        rental_cost = 30 * rental_days
    elif rental_weeks >= 1:
        rental_cost = 95 * rental_weeks
    elif rental_months >= 1:
        rental_cost = 270 * rental_months

    # Add VAT to rental cost
    rental_cost = ((rental_days * 36) + (rental_weeks * 114) + (rental_months * 324)) * 1.2
    # Update the cost label
    cost_label.config(text="Total cost: " + str(round(rental_cost, 2)))

def rent_car():
    # Get customer details
    name = name_entry.get()
    dob = dob_entry.get()
    nationality = nationality_entry.get()
    licence_duration = licence_entry.get()
    # Display rental details
    rental_label.config(text="Thank you, " + name + ". You have rented a " + category_var.get() + " car for " + str(rental_duration) + " " + duration_var.get_name() + ".")
    # Disable form fields
    name_entry.config(state="disabled")
    dob_entry.config(state="disabled")
    nationality_entry.config(state="disabled")
    licence_entry.config(state="disabled")
    category_small.config(state="disabled")
    category_medium.config(state="disabled")
    category_large.config(state="disabled")
    one_day.config(state="disabled")
    one_week.config(state="disabled")
    one_month.config(state="disabled")
    # Enable the checkout button
    checkout_button.config(state="normal")

def validate_age():
    dob = dob_entry.get()
    age = calculate_age(dob)
    if age < 24:
        tk.Label(text="You must be aged 24 or over to complete this rental form.")
        submit_button.config(state="disabled")
    else:
        tk.Label(text="")
        submit_button.config(state="normal")

def checkout():
    # Display checkout message
    checkout_label.config(text="Thank you for your custom. You have been charged " + str(round(rental_cost, 2)) + ".")

def calculate_age(dob):
    # Calculate age from date of birth
    # Assuming dob is in the format "dd/mm/yyyy"
    dob_list = dob.split("/")
    dob_day = int(dob_list[0])
    dob_month = int(dob_list[1])
    dob_year = int(dob_list[2])
    today = date.today()
    age = today.year - dob_year - ((today.month, today.day) < (dob_month, dob_day))
    return age

small_car_img = tk.PhotoImage(file="small-car (1).gif")
medium_car_img = tk.PhotoImage(file="mid-size-car.gif")
large_car_img = tk.PhotoImage(file="large-car (1).gif")

def update_image():
    if category_var.get() == "Small":
        image_label.config(image=small_car_img)
    elif category_var.get() == "Medium":
        image_label.config(image=medium_car_img)
    elif category_var.get() == "Large":
        image_label.config(image=large_car_img)

# Create form fields
name_label = tk.Label(window, text="Name:")
name_label.pack()
name_entry = tk.Entry(window)
name_entry.pack()

dob_label = tk.Label(window, text="Date of birth (dd/mm/yyyy):")
dob_label.pack()
dob_entry = tk.Entry(window)
dob_entry.pack()

validate_age_button = tk.Button(window, text="Validate Age", command=validate_age)
validate_age_button.pack()

nationality_label = tk.Label(window, text="Nationality:")
nationality_label.pack()
nationality_entry = tk.Entry(window)
nationality_entry.pack()

licence_label = tk.Label(window, text="How long have you held your licence for? (years):")
licence_label.pack()
licence_entry = tk.Entry(window)
licence_entry.pack()

label = tk.Label(window, text="Select a car category:")
label.pack()

category_var = tk.StringVar()
small_button = tk.Radiobutton(window, text="Small", variable=category_var, value="Small")
medium_button = tk.Radiobutton(window, text="Medium", variable=category_var, value="Medium")
large_button = tk.Radiobutton(window, text="Large", variable=category_var, value="Large")

image_label = tk.Label(window)
image_label.pack()

small_button.pack()
medium_button.pack()
large_button.pack()

small_button.config(command=update_image)
medium_button.config(command=update_image)
large_button.config(command=update_image)

rental_label_months = tk.Label(window, text="How many months do you plan on renting the car for?:")
rental_label_months.pack()
rental_label_months_entry = tk.Entry(window)
rental_label_months_entry.pack()

rental_label_weeks = tk.Label(window, text="How many weeks do you plan on renting the car for?:")
rental_label_weeks.pack()
rental_label_weeks_entry = tk.Entry(window)
rental_label_weeks_entry.pack()

rental_label_days = tk.Label(window, text="How many days do you plan on renting the car for?:")
rental_label_days.pack()
rental_label_days_entry = tk.Entry(window)
rental_label_days_entry.pack()

cost_label = tk.Label(window, text="Your Total Cost Is: ")
cost_label.pack()
print(cost_label)
cost_label.config(text="Total cost: " + str(round(rental_cost, 2)))

rental_cost_button = tk.Button(window, text="Calculate Cost", command=calculate_cost)
rental_cost_button.pack()

submit_button = tk.Button(window, text="Submit Form", command=submit_form)
submit_button.pack()

window.mainloop()