We have an AMI & by using this we have created a launch template which in turn is used in auto scaling groups
Now developer has a new change which leads to new AMI and this image needs to be updated in autoscaling group without bringing the whole application down.
This concept is referred as upgrades.
Lab setup
Version 1 home page
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Welcome!</title>
<style>
body {
font-family: sans-serif;
background-color: #ADD8E6; /* Light Blue */
display: flex;
justify-content: center;
align-items: center;
height: 100vh; /* Make sure it fills the whole viewport */
margin: 0; /* Remove default body margins */
}
.container {
text-align: center;
padding: 20px;
background-color: #FFFFFF; /* White container background */
border-radius: 10px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1); /* Optional shadow */
}
h1 {
color: #007BFF; /* A brighter blue for the heading */
}
p {
font-size: 1.2em;
color: #333;
}
</style>
</head>
<body>
<div class="container">
<h1>Welcome to Learning!</h1>
<p>We're glad you're here to start your learning journey!</p>
</div>
</body>
</html>
Version 2 home page
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Welcome!</title>
<style>
body {
font-family: sans-serif;
background-color: #FF69B4; /* Hot Pink */
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
margin: 0;
}
.container {
text-align: center;
padding: 20px;
background-color: #FFFFFF; /* White container background */
border-radius: 10px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
h1 {
color: #C71585; /* Medium Violet Red (darker pink) */
}
p {
font-size: 1.2em;
color: #333;
}
</style>
</head>
<body>
<div class="container">
<h1>Welcome to Learning!</h1>
<p>We're glad you're here to start your learning journey!</p>
</div>
</body>
</html>
Lets create an AMI for version 1 as done in class
now create a launch template with welcome ami
Now create an asg with this launch template and choose the default or latest version in launch template (for options watch classroom recording)
Now create a new ami with version 2
update the launch tempate with new ami version as latest and default
