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Merge pull request #116 from mkulke/alb-gotcha

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Added ALB Gotcha about unhealthy targets (Attempt #2)
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Joshua Levy 2016-10-11 18:36:15 -07:00 committed by GitHub
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@ -880,6 +880,7 @@ ALB
- ALBs do not (yet) support routing based on HTTP “Host” header or HTTP verb. - ALBs do not (yet) support routing based on HTTP “Host” header or HTTP verb.
- Instances in the ALB's target groups have to either have a single, fixed healthcheck port (“EC2 instance”-level healthcheck) or the healthcheck port for a target has to be the same as its application port (“Application instance”-level healthcheck) - you can't configure a per-target healthcheck port that is different than the application port. - Instances in the ALB's target groups have to either have a single, fixed healthcheck port (“EC2 instance”-level healthcheck) or the healthcheck port for a target has to be the same as its application port (“Application instance”-level healthcheck) - you can't configure a per-target healthcheck port that is different than the application port.
- ALBs are VPC-only (they are not available in EC2 Classic) - ALBs are VPC-only (they are not available in EC2 Classic)
- In a target group, if there is no healthy target, all requests are routed to all targets. For example, if you point a listener at a target group containing a single service that has a long initialization phase (during which the health checks would fail), requests will reach the service while it is still starting up.
Elastic IPs Elastic IPs
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