Blue/Green deployments are a powerful strategy for managing application updates with minimal downtime and risk. This approach involves maintaining two identical environments, termed Blue and Green. One environment is live (handling production traffic), while the other can be updated and tested before switching traffic. This ensures that if an issue arises, you can quickly switch back to the previous stable environment.
Implementing blue/green deployments can help you monitor costs associated with running each service. By keeping both environments active, you can easily compare resource usage and optimize cloud costs for your services.
// Example script for managing blue/green deployments
$currentEnvironment = 'blue'; // Current live environment
$newEnvironment = 'green'; // New environment to deploy
function switchEnvironment($current, $new) {
echo "Switching from $current to $new environment...\n";
// Update traffic routing here
// This could involve updating a load balancer or DNS entry
// Perform the switch
$currentEnvironment = $new;
$newEnvironment = $current;
echo "$current to $new switch complete.\n";
}
// Simulate deployment process
echo "Deploying new version to $newEnvironment...\n";
// After validation, switch environments
switchEnvironment($currentEnvironment, $newEnvironment);
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