AWS released a nice little feature last week that did not seem to get much attention or fanfare on the internet. EC2 auto scaling groups can now span across multiple availability zones. This enables some additional niftiness for your EC2 fleet:
- High availability by balancing a group of auto scaled EC2 instances spread across multiple Availability Zones.
- Avoid insufficient capacity errors automatically by letting AWS rebalance your autoscaling group in an availability zone with capacity.
Ylastic lets you leverage this feature for your auto scaling groups:
- You can create auto scaling groups which span multiple zones.
- You can expand your existing auto scaling groups to additional zones.
Ah, auto scaled EC2 instances spanning multiple availability zones behind an elastic load balancer :-)
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