<p>Dear Amazon Web Services Customer,</p>( b2 {( r* [8 t
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<p>We are excited to announce that Route 53 DNS Failover now supports - y; r( F' B, m
Elastic Load Balancing (ELB) endpoints. Starting today, you can use * t& I6 `6 ~4 Q3 `$ }
Route 53’s existing health checking and DNS failover features for , y, A! R1 s0 w" L' O$ B4 E
applications running behind an ELB, to increase redundancy and % F m. U+ l( t) g
availability for these apps.</p>$ P, L0 x% T& o9 _9 E
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<p>With DNS Failover, Amazon Route 53 can help detect an outage of your 4 _8 E( Z. a( E5 v7 L5 F1 U
website and redirect your end users to alternate locations where your 1 Y2 z. i5 P k) X( K- B+ `, j' Y
application is operating properly. When you enable this feature, Route 7 e4 Y8 v9 s% p5 L3 ?5 s
53 uses health checks—regularly making Internet requests to your * N, \+ L# i& m6 p( r4 q ?, p
application’s endpoints from multiple locations around the world—to 7 {% B. N5 ~1 I
determine whether each endpoint of your application is up or down. </p>& U" B" d9 }9 `6 Z, W4 |
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<p>For ELB endpoints, Route 53 evaluates the health of the load balancer) c; B4 ?7 t1 q# J! U: q+ R
itself and the health of your application running on the EC2 instances ; S- s* ]* U: ~) W, N3 o% b
behind it. If any part of the stack goes down, Route 53 detects the 3 _ T0 W1 n( R X
failure, routes traffic away from the load balancer, and directs traffic , `0 O3 k& m4 B* r8 Q$ N* B7 c. |
to other healthy ELB endpoints. Route 53 DNS Failover also supports EC2/ O% d9 s- I: c2 i/ _3 q
endpoints as well as endpoints located in your own datacenter.</p> . n. J R$ ~: I/ V; X( W
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<p>Using Route 53 DNS Failover, you can run your primary application " Q$ q) a$ q1 [9 W+ l- z
simultaneously in multiple AWS regions around the world. Route 53 * @3 {! ]/ b8 }+ D K5 }0 \
automatically removes from service any region where your application is % D D* i) g* `
unavailable. You can also take advantage of a simple backup site hosted ' V7 Z( R$ X. F1 B5 l
on Amazon Simple Storage Service (Amazon S3), with Route 53 directing ( T% Y' x' f- q% E; t+ ~
users to this backup site in the event that your application becomes ( {' a7 k; ^# E( n" s
unavailable.</p>6 U% Z' Y3 P# x x; w* u Q
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<p>Health checks of Amazon ELB endpoints are free, and getting started is easy. To learn more, <a href="http://www.amazon.com/gp/r.html?R=2EMCE4T8E0NWD&C=3STR8RC5Q6H1Y&H=SUOGRM79MBBGDQ7LV8TUA2X4AYIA&T=C&U=http%3A%2F%2Faws.amazon.com%2Froute53%3Fref_%3Dpe_2170_30194830_8">visit the Route 53 product page</a> or review our walkthrough in the <a href="http://www.amazon.com/gp/r.html?R=2EMCE4T8E0NWD&C=3STR8RC5Q6H1Y&H=XGI2ROQULL3C7OX10QVMHGAWVRMA&T=C&U=http%3A%2F%2Fdocs.aws.amazon.com%2FRoute53%2Flatest%2FDeveloperGuide%2Fdns-failover.html%3Fref_%3Dpe_2170_30194830_9">Amazon Route 53 Developer Guide</a>.</p>5 Z7 ?8 G! L9 f
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<p>Also, please feel free to join our <a href="http://www.amazon.com/gp/r.html?R=2EMCE4T8E0NWD&C=3STR8RC5Q6H1Y&H=J5S7YSYDGDMA3VFQM4MDM14GRX4A&T=C&U=http%3A%2F%2Fw.on24.com%2Fr.htm%3Fe%3D622099%26s%3D1%26k%3D3563EF264F8961EAF9AD217B6CE34446%26partnerref%3DLE%26ref_%3D7">webinar at 10:00 am PDT on July 9, 2013</a> to learn more about DNS Failover and the high-availability architecture options that it makes possible.</p>6 M( ` O, n7 a4 @
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<p>Sincerely, 0 }" S# p9 e' O( d+ ] K9 {
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The Amazon Web Services Team</p>
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对于使用route53的同学是个好事,简单的 geo dns + failover( E! Q9 ?6 B0 }+ @* V
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