Ensure No Product Tenants Are Opened During Maintenance Mode

🚀 How to set maintenance mode for thoudsands of tenants

• Create a record set call alb-tunnel.cloudopz.com as a CNAME point to the ALB
• Set aLL Tenant records point to alb-tunnel.cloudopz.com with type CNAME
• So when it needs to set maintainance mode, we just need to set alb-tunnel.cloudopz.com point to our maitainance page

🚀 Why need to Ensure No Product Tenants Are Opened During Maintenance Mode

• During maintainance mode, the database might be running migrated so customer should not access the site
• We need to ensure no tenant product point to ALB directly except test/demo sites. Here is the way to manually check (free feel to automate it)

aws route53  list-resource-record-sets --hosted-zone-id Z39FXXXXXXXXXX --query "ResourceRecordSets[?Type == 'CNAME']" | jq -r '.[] | [([.Name, .ResourceRecords[].Value] | join(", "))] | @csv' | 
grep "alb-.*..amazonaws.com" | grep -Ev "test|demo" 

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