nisanthchunduru

My experience upgrading from kamal 1 to kamal 2

Since kamal 1 launched, I hosted my blog https://nisanthchunduru.com/ in a Cloud VM using kamal 1. kamal deploys a project to Docker containers in 1 or more servers.

In Q3 2024, Basecamp launched kamal 2. kamal 2 is slightly backwards incompatible with kamal 1.

When a kamal command I ran unexpectly failed, I decided to just upgrade my blog to kamal 2 (instead of investing time to investigate a failure in an older kamal version).

To upgrade to kamal 2, I

nisanthchunduru

nisanthchunduru

kamal deploy
Log into image registry...
  INFO [43ba0482] Running docker --version && docker buildx version as chunisan@localhost
  INFO [43ba0482] Finished in 0.263 seconds with exit status 0 (successful).
  INFO [78be9720] Running docker login -u [REDACTED] -p [REDACTED] as chunisan@localhost
  INFO [78be9720] Finished in 3.187 seconds with exit status 0 (successful).
  INFO [335cb57f] Running docker login -u [REDACTED] -p [REDACTED] on 150.136.2.200
  INFO [335cb57f] Finished in 3.772 seconds with exit status 0 (successful).
Build and push app image...
  INFO [57fe232e] Running docker --version && docker buildx version as chunisan@localhost

nisanthchunduru

// TODO: Migrate to AWS Node SDK V3
const AWS = require('aws-sdk');
const cloudformation = new AWS.CloudFormation()async function disableTerminationProtection(stackNames) {
  for (const stackName of stackNames) {
    try {
      await cloudformation.updateTerminationProtection({
        EnableTerminationProtection: false,
        StackName: stackName,
      }).promise();
      console.log(`Termination protection disabled for stack ${stackName}`);

nisanthchunduru

# This program was generated by ChatGPT

import numpy as np

# Sigmoid activation function
def sigmoid(x):
    return 1 / (1 + np.exp(-x))

# Derivative of the sigmoid function
def sigmoid_derivative(x):

nisanthchunduru

# In config/application.rb

class ResponseLogger
  def initialize(app)
    @app = app
  end

  def call(env)
    headers = env.select {|k,v| k.start_with? 'HTTP_'}
    .map {|pair| [pair[0].sub(/^HTTP_/, ''), pair[1]].join(": ")}

nisanthchunduru

Structs & functions

#include <stdio.h>
#include <string.h>

int stringsTotalLength(char* firstString, char* secondString) {
  int totalLength = strlen(firstString) + strlen(secondString);
  return totalLength;
}

nisanthchunduru

# send email using STARTTLS; Net::SMTP#enable_starttls requires ruby >=1.8.7
# this hack is needed for rails <2.3; apparently >=2.3 has something for this already

ActionMailer::Base.class_eval do
  private
  def perform_delivery_smtp(mail)
    destinations = mail.destinations
    mail.ready_to_send

    smtp = Net::SMTP.new(smtp_settings[:address], smtp_settings[:port])

nisanthchunduru

#! /bin/sh
### BEGIN INIT INFO
# Provides:		redis-server
# Required-Start:	$syslog $remote_fs
# Required-Stop:	$syslog $remote_fs
# Should-Start:		$local_fs
# Should-Stop:		$local_fs
# Default-Start:	2 3 4 5
# Default-Stop:		0 1 6
# Short-Description:	redis-server - Persistent key-value db

nisanthchunduru

{
  "_json" => [{
    "email" => "lovis@tinybuddy.se",
    "timestamp" => 1540907117,
    "status" => "4.3.0",
    "reason" => "maildrop: maildir over quota.",
    "sg_message_id" => "kxRB0RumSp6z8tkmLZnUMQ.filter0176p3mdw1-22850-5BD1C50F-7C.0",
    "sg_event_id" => "QcLgvoOaRWCXLZ72J-lf1g",
    "type" => "blocked",
    "event" => "bounce"