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Amazon Route53 Health Checks Available in CloudWatch

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Route 53 Health Checks Website availability is utmost important if your business depends on it. There are lots of free services (and paid services, too) to constantly monitor your site's availability and send you an email if website is not available. Some of these services offer periodic checks for every 15 minutes, some in 5, and only few support checking your site's health every 60 seconds or less. While this sounds good, what can you do about when your site actually is down? Imagine scenario like this: it's 8pm Friday, nobody is in the office, tech support does not pick up the phone. And your website is down, totally. Yes, you received alert, even multiple alerts. Even some clients call, and your competitors rub hands. Here's what you can do: enable Route53 health checks and host backup site in Amazon S3 (the backup site can simply say that "Sorry, we are currently experiencing technical issues; please check back later." - it is 100 times better than...
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Enable HTTP/2 Support in AWS ELB

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This thread  was started more than a year ago, asking for when Amazon Web Services will add support for HTTP/2  into their ELB. In addition to that, people are also asking, how to configure ELB to support multiple SSL certificates. AWS support team has been reluctant on giving out any specific details on when both of these features will be available, citing: I've verified that the ELB team is aware of the interest in ELB supporting HTTP/2. Please keep an eye on What's New from Amazon Web Services: http://aws.amazon.com/new/ for any updates. What is HTTP/2? HTTP/2 is a replacement for how HTTP is expressed “on the wire.” It is not a ground-up rewrite of the protocol; HTTP methods, status codes and semantics are the same, and it should be possible to use the same APIs as HTTP/1.x (possibly with some small additions) to represent the protocol. HTTP/2 protocol is supported by major modern browsers including IE11, Edge 13, Firefox 47, Chrome 52, Safari 9.1, Opera 38, ...
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MongoDB: Remove an Arbiter From a Replica Set

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Removing an arbiter from MongoDB Replica Set can be quite tricky, and official MongoDB documentation does not say it directly how to do it. I assume that you have auth enabled (just like I have), so lets start with connecting to your ReplicaSet "repl" master as an administrator: mongo mongo.domain.com/admin -u admin -p pass You will see the following prompt: repl:PRIMARY> Type in conf=rs.conf() repl:PRIMARY> conf = rs.conf() { "_id" : "repl", "version" : 8, "members" : [ { "_id" : 0, "host" : "mongo.server.com:27017", "priority" : 2 }, { "_id" : 1, "host" : "mongo1.server.com:27017" }, { "_id" : 2, "host" : "arbiter.server.com:27017", "arbiterOnly" : true }, { "_id" : 3, "host" : "mongo2.server.com:27017" } ] } Now lets adjus...
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