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talawahtech/under-maintenance.yaml

Last active January 18, 2019 22:01
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CloudFormation snippet for quickly putting a site behind a Load Balancer "under maintenance"
Raw
under-maintenance.yaml
Parameters:
UnderMaintenance:
Description: 'Returns a static "under maintenance" page and a 503 response code. ONLY WORKS WITH ALB'
Type: String
Default: 'NO'
AllowedValues: ['YES', 'NO']
Conditions:
UnderMaintenance: !Equals [!Ref 'UnderMaintenance', 'YES']
Resources:
UnderMaintenanceListenerRule:
Condition: UnderMaintenance
Type: AWS::ElasticLoadBalancingV2::ListenerRule
Properties:
ListenerArn: !Ref YOUR LOAD BALANCER LISTENER
Priority: 1 # Highest priority
Conditions:
- Field: path-pattern
Values: ['*'] # Catch-all
Actions:
- Type: 'fixed-response'
FixedResponseConfig:
StatusCode: 503
ContentType: 'text/html'
MessageBody: >
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, shrink-to-fit=no">
<title>Under Maintenance</title>
<style>
html, body{ height: 100%; }
body{display: flex; align-items: center; margin: 0 0.8rem; background:linear-gradient(45deg, #292561, #122040);}
main{width: 100%; text-align: center; color:#fff; font-family: "Open Sans", sans-serif;}
h1{margin: 0; font-size: 3.5rem;}
p{margin-top: 1rem; font-size: 1.5rem;}
@media screen and (max-width: 480px) {h1 {font-size: 2rem;} p {font-size: 1.2rem;} }
</style>
</head>
<body>
<main>
<h1>Under Maintenance &#x1F6A7</h1>
<p>We apologize for the inconvenience. We'll be back online as soon as possible!</p>
</main>
</body>
</html>
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