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• Easy GUI way to auto scale EC2 and RDS: aws console, scalr, ylastic...?

  - by Zillo

  I am managing all my instances with the AWS Management Console (the GUI web console) but now I want to use Auto Scale and it seems that this can not be done with that console. Yes, there is CloudWatch but I can only create alarms (e-mail notifications), it seems that CouldWatch needs you to add the auto scale policy in some other place (by command line console?). I would like to use some easy GUI interface. Ylastic and Scalr seems to be a good option. Which one do you think is better? Regarding Scalr, is there any difference between the open source software Scalr and the service Scalr.net? I mean, is the GUI interface the same? I like the idea of the Scalr because I do not need to give my Secret Access Key to a third party (like in Ylastic or in Scalr.net) One question about the Scalr software, it has to be installed in the instances or it must be installed in another machine? Do I need to setup again all my security permissions, AMIs, snapshots, etc. or I can use AWS Management Console for everything and Scalr just to auto scale.

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• EC2 persistence of machine

  - by Seagull

  I notice that EBS-backed AMIs are much like a VMWare instances -- I can stop them and also persist them to disk, and all this is done relatively quickly. However, I believe that S3 backed machines are different. They cannot be 'stopped', but rather can only be shut-down, written to S3 disk and started up again; with at least a 15 min delay in doing so. Why the difference? How do AMI providers decide whether to use EBS or S3? If I need to stop/persist/restart machines relatively frequently, then I am implicitly limited to just the EBS-backed machines?

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• Database modularity with EBS volumes

  - by Eclyps19

  I would like to add modularity to my websites on EC2 instances by encapsulating the site files and the mysql files in their own EBS volumes. The end result that I'm going for is the ability to quickly mount a volume or two to different servers running the same AMI (for testing/development/emergency maintenance, etc), as well as maintain separate snapshots of each. I'm able to do this fairly easily with a single database by symlinking my mounted database EBS to the appropriate places (/var/lib/mysql, /etc/my.cnf, /var/log/mysqld.log), but I'm not sure if it would even be possible be possible to have multiple databases on different EBS volumes running concurrently. Example: /website1/www.website.com /database1/ /website2/www.otherwebsite.com /database2/ Could anybody shed some light on this for me? Is it possible? Is it a bad idea? Thanks.

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• Disable disk caches in AWS EBS for PostgreSQL?

  - by Alexandr Kurilin

  It's my understanding that, without correctly disabling OS-level and drive-level caching, there is a chance that in case of system failure the Write-Ahead Log might not be saved correctly and in fact might get corrupted, possibly preventing data recovery. I've already made sure that wal_sync_method=fdatasync however I was unable to make any configuration changes with hdparm since I get the following: $ sudo htparm -I /dev/xvdf /dev/xvdf: HDIO_DRIVE_CMD(identify) failed: Invalid argument Looks like that option is not available in the kind of setup you get in EC2. Am I missing anything here? Are there any other obvious caches I have to disable to ensure the WAL's safety?

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• Picking only the value field out of Cloudwatch Dimensions, Java

  - by GroovyUser

  I have some data that are retried from the cloudwatch api's. Specifically I have used listMetrics. The data that I got from this call is : {Metrics: [{Namespace: Metric from grails, MetricName: hello123, Dimensions: [{Name: name, Value: 1425, }], }, {Namespace: Metric from grails, MetricName: hello123, Dimensions: [{Name: name, Value: 1068, }], }, That was the correct data as I would expect. I need a way to return only the value fields. Not others things. Is there any way to do this, in java? Thanks in advance.

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• How to change the computer name on a server configured by Puppet

  - by David Sulpy

  I am new to Puppet and I'm trying to get Puppet to configure my EC2 instances after they're started from a Cloud Formation Template in AWS. The problem is that all the nodes that get started from the Cloud Formation Template all have the same name (the name from the AMI that the new nodes derive from). I would love to find a way to have puppet rename the nodes when the nodes start up. (although, as far as I know, a Computer Name change requires reboot, a separate issue...) If you can point me to some documentation that can help me figure this out or if you have any ideas that would be great. My ultimate goal is to have each EC2 start with a unique name so that I can use New Relic server monitoring to report the different servers.

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• Using EC2 instance as main development platform

  - by David

  My problem I am working as a consultant for various companies. Each company provides me with a laptop where with their software on and I also have my own where I have my development environment. I tend to buy a new laptop every second year and find myself spending lots of time configuring and installing software. I also sometimes spend a lot of time waiting for my laptop to process things. To solve all these issues, I am now considering using EC2 (running windows instances) as my main development platform and just access this from any PC I happen to be at. I calculated that running the High-CPU On-Demand Instances (medium) for 8 hours a day for a year costs me 580$, which is acceptable. I imagine that when I approach the workplace each day, I will make a single click my phone to fire up the instance, so it is ready when I get to work. I should have different icons on my phone to fire up the various instance types. The same software should of course automatically be loaded on the various hardware (sometimes I would even need their instance with 68.4 GB of memory). Another advantage is that if I am having a specific problem with my instance, I could fire up another instance and have someone look into the problem and update the image. My question: Does anyone have experience with such a setup on EC2? What kind of problems do you forsee?

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• How can I tell my dd-wrt router to use someone's Amazon Affiliates link when I point my browser to amazon.com?

  - by Michael Paul

  Here's what I'd like to do. Instead of a one-time donation to one of my favorite free tools (junecloud.com) I'd like to do what they suggest here and use their Amazon Affiliates link to do all my Amazon shopping. I shop at amazon once or twice a week, so this is a great way to let them earn lots of long-term cash without me dropping a dime. My thought was to go into my dd-wrt enabled router and tell it, "any time I go to amazon.com on any computer in the house, please go to http://www.amazon.com/gp/redirect.html?link_code=ur2&tag=junecloud-20&camp=1789&creative=9325&location=%2F instead. (That URL simply redirects me to amazon.com but every purchase I make during that session is credited to JuneCloud.) Once logged into dd-wrt, I went to Services Services DNSMasq but I'm not really sure how to get it to work from there, or if it's even possible. I know I can redirect IP addresses, but I'm looking to redirect someone on my network from amazon.com to the special amazon affiliate code link. Hope that's clear. Thanks for any replies!

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• What type of amazon instance should I use and do I need auto scaling and load balancing?

  - by Navetz

  Hi I am looking to release a website that will initially have large amounts of uploads from users. The first will be 65GB and the rest will probably be close to 1TB. They could happen simultaneously. My question is what type of amazon server instance would be best for this? The website is just being released so the traffic wont be very high. I have been using a micro instance for development but it is time to launch and I need more power. Should I use auto scaling and a load balancer to increase the number of instances when I need it or Will a small or medium instance do the trick? If I do use auto scaling and load balancing how do I handle things like sessions and the database/file lookups? Does one instance become the primary instance and the rest become clones?

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• C# code to GZip and upload a string to Amazon S3

  - by BigJoe714

  Hello. I currently use the following code to retrieve and decompress string data from Amazon C#: GetObjectRequest getObjectRequest = new GetObjectRequest().WithBucketName(bucketName).WithKey(key); using (S3Response getObjectResponse = client.GetObject(getObjectRequest)) { using (Stream s = getObjectResponse.ResponseStream) { using (GZipStream gzipStream = new GZipStream(s, CompressionMode.Decompress)) { StreamReader Reader = new StreamReader(gzipStream, Encoding.Default); string Html = Reader.ReadToEnd(); parseFile(Html); } } } I want to reverse this code so that I can compress and upload string data to S3 without being written to disk. I tried the following, but I am getting an Exception: using (AmazonS3 client = Amazon.AWSClientFactory.CreateAmazonS3Client(AWSAccessKeyID, AWSSecretAccessKeyID)) { string awsPath = AWSS3PrefixPath + "/" + keyName+ ".htm.gz"; byte[] buffer = Encoding.UTF8.GetBytes(content); using (MemoryStream ms = new MemoryStream()) { using (GZipStream zip = new GZipStream(ms, CompressionMode.Compress)) { zip.Write(buffer, 0, buffer.Length); PutObjectRequest request = new PutObjectRequest(); request.InputStream = ms; request.Key = awsPath; request.BucketName = AWSS3BuckenName; using (S3Response putResponse = client.PutObject(request)) { //process response } } } } The exception I am getting is: Cannot access a closed Stream. What am I doing wrong?

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• Amazon Web services - retrieving a wishlist

  - by izb

  I've been tinkering with Yahoo Pipes and the Amazon E-Commerce Service (ECS) SDK to retrieve my wishlist. The problem is that although I can get all the items on my wishlist just fine, it seems to include items that I've deleted too. Has anyone else used this API and noticed this? Is there a way around it? UPDATE: Requested additional information in comments... Here is the URL I use to fetch the wishlist XML: http://webservices.amazon.co.uk/onca/xml?SubscriptionId=[my subs id]&Service=AWSECommerceService&ResponseGroup=ListItems&ProductPage=1&ProductGroup=Book&Operation=ListLookup&ListType=WishList&ListId=[my list id] And here is the relevant part of the XML response: <ListId>[my list id]</ListId> <ListName>Wishlist</ListName> <TotalItems>132</TotalItems> <TotalPages>14</TotalPages> <ListItem> <ListItemId>EPIE5559HKT391</ListItemId> <DateAdded>2003-11-17</DateAdded> <QuantityDesired>1</QuantityDesired> <QuantityReceived>0</QuantityReceived> <Item> <ASIN>5557205521</ASIN> <ItemAttributes> <Title>Horton hears a who</Title> </ItemAttributes> </Item> </ListItem> ... The rest of the XML is just either more list items like that, or information about the request at the top of the response.

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• Issues with Rails, Amazon S3, and protected URLs

  - by Shpigford

  So I followed this little tutorial about protecting downloads of files that are uploaded to Amazon S3 with Paperclip. When I've developed locally, it's worked fine, but since pushing the exact same code to a production server...I now get this error from Amazon when I try to access the files: <Error> <Code>InvalidArgument</Code> <Message>Either the Signature query string parameter or the Authorization header should be specified, not both</Message> <ArgumentValue>Basic dGVjaHVrdWxlbGU6ZWxlbHVrdWhjZXQ=</ArgumentValue> <ArgumentName>Authorization</ArgumentName> <RequestId>F6E455857C54F95A</RequestId> <HostId>X4QA2pw9wpHtJtJ2T8qxCyINjq4PLHQVF4VrlYjpX7Ayh694BgQprh5p8H7NRCAt</HostId> </Error> Example URL: http://s3.amazonaws.com/media.example.com/assets/videos/1/original.mov?AWSAccessKeyId=MY_ACCESS_KEY&Expires=1271972624&Signature=7wWH2WYHPO0o9szwPJbimUMqAig%3D That URL is generated using AWS::S3::S3Object.url_for using the aws-s3 gem. So...not even sure where to start. The fact that it works fine when the app is running locally but not when in production really doesn't make sense. The production server is running Ubuntu 8.04.4 LTS (Hardy).

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• Apple Giving Away $10,000 On The Occasion of 10 Billion App Store Downloads

  - by Gopinath

  Apple got yet another reason to brag it’s App Store success – nearly 10 billion apps  downloaded around the world. To show off this, they put a big banner over here   To celebrate the occasion, Apple will give $10,000 iTunes Gift Card to the person who downloads the 10th billion app, either free or paid app. Rules and regulations of the contest are available here. Apple’s App Store is a huge success and it’s at the centre of it’s smart devices eco system – iPhone, iPad and iPod. In April 2009 the store marked 1 billionth download, September 2009 2 billionth and in January 2010, 3 billionth app downloaded. In less than an year the number downloads has seen 3 fold growth and all set to reach 10 billions. This article titled,Apple Giving Away $10,000 On The Occasion of 10 Billion App Store Downloads, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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• "Instance variable 'xxx' accessed in class method....why?

  - by Michael Levy

  So please forgive me as I am very new to stackoverflow and to ios programming in general. I am attempting to change the text of a button i have, replacing current text with a date string (dateStringForInput) I am passing in from another class. The button is called myTodayButton and is declared in my .h file for my class inputMilesViewController... @property (strong, nonatomic) IBOutlet UIButton *myTodayButton; Below is the code from my .m. +(void) changeButtonText:(NSString*) dateStringForInput{ NSLog(@"we got to changebuttontext"); [_myTodayButton setTitle:dateStringForInput forState:UIControlStateNormal]; } I am getting the following error "Instance variable "_myTodayButton" accessed in class method. I understand that this is written in a class method rather than an instance method but i cant figure out how to get this change to happen. the button which prompts this call to changeButtonText is in the other class which is creating dateStringForInput. please help! thanks so much! be gentle with me....a bit overwhelmed . :-)

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• What settings need to be changed to allow EC2 instances to use Amazon's Route 53 for DNS?

  - by ks78

  I have a number of Amazon EC2 instances, all running Ubuntu, which I'd like to configure to use Amazon's Route 53. I setup a script, following Shlomo Swidler's article, but ran into script-related issues, which were answered here. Now, I have the script working, but my instances are still not able to access Route 53's DNS. By this I mean, they are not able to resolve hostnames to IP addresses. My instances are currently configured with the DNS server IP address Amazon pushes out to them by default, does that need to be changed when using Route 53? I'm also IP-restricting my instances using the Security Groups. Could that be the problem? Is there a certain IP address or port I should open to allow communication with Route 53? It seems that DNS requests should be originating from my instances so the Security Groups shouldn't be an issue, but I've been wrong before. If anyone has any ideas, I'd really appreciate it.

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• How can I get the size of an Amazon S3 bucket?

  - by Garret Heaton

  I'd like to graph the size (in bytes, and # of items) of an Amazon S3 bucket and am looking for an efficient way to get the data. The s3cmd tools provide a way to get the total file size using s3cmd du s3://bucket_name, but I'm worried about its ability to scale since it looks like it fetches data about every file and calculates its own sum. Since Amazon charges users in GB-Months it seems odd that they don't expose this value directly. Although Amazon's REST API returns the number of items in a bucket, [s3cmd] doesn't seem to expose it. I could do s3cmd ls -r s3://bucket_name | wc -l but that seems like a hack. The Ruby AWS::S3 library looked promising, but only provides the # of bucket items, not the total bucket size. Is anyone aware of any other command line tools or libraries (prefer Perl, PHP, Python, or Ruby) which provide ways of getting this data?

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• Amazon CloudFront Cache Invalidation – Fill out the Survey!

  - by joelvarty

  Amazon have come up with a survey regarding how cache can be invalidated on object stored in their CloudFront servers. http://survey.amazonwebservices.com/survey/s?s=1369   This is a key feature for Agility CMS, and for a lot of other applications. If it’s important to you, I suggest you spend a few minutes and fill it out. more later - joel

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• How to setup IPSec with Amazon EC2

  - by bonzi

  How to setup an IPSec connection from my ubuntu laptop to Amazon EC2 instance? I tried setting it up using elastic IP and VPC with the following openswan configuration but it is not working. conn host-to-host left=%defaultroute leftsubnet=EC2PRIVATEIP/32 # Local netmask leftid=ELASTICIP leftrsasigkey= connaddrfamily=ipv4 right=1laptopip # Remote IP address rightid=laptopip rightrsasigkey= ike=aes128 # IKE algorithms (AES cipher) esp=aes128 # ESP algorithns (AES cipher) auto=add pfs=yes forceencaps=yes type=tunnel

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• How to setup IPSec with Amazon EC2

  - by bonzi

  How to setup an IPSec connection from my ubuntu laptop to Amazon EC2 instance? I tried setting it up using elastic IP and VPC with the following openswan configuration but it is not working. conn host-to-host left=%defaultroute leftsubnet=EC2PRIVATEIP/32 # Local netmask leftid=ELASTICIP leftrsasigkey= connaddrfamily=ipv4 right=1laptopip # Remote IP address rightid=laptopip rightrsasigkey= ike=aes128 # IKE algorithms (AES cipher) esp=aes128 # ESP algorithns (AES cipher) auto=add pfs=yes forceencaps=yes type=tunnel

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• What is a good Amazon S3 client?

  - by Eyal

  I've been using the Amazon S3 Management console to browse my S3 files. Unfortunately, it doesn't seem to be able to sort files (in a given bucket) by anything other than whatever its default is (which seems to be by name). I'd like a nice GUI client for seeing these files which will let me sort them by date, so the newest will appear on top. I did find a Firefox plug-in - S3Fox - but it doesn't work for the current version of Firefox.

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• Windows Store is open for business!

  - by pluginbaby

  In case you didn’t know, you don’t have to wait for the launch of Windows 8 on October 26 to start building and deploying your apps. Developers from 120 markets (including Canada) can publish Windows Store apps right now! How to start ? Anyone with an MSDN Subscription, Dreamspark account (students) or BizSpark account (startups) get a 1-year Windows Store membership for FREE!! If you don’t have such account, an annual membership is only CAD $49 and lasts a full year. Just go to the Windows Store Dashboard on the Windows Dev Center and sign up. The dev tools are free and the SDK is ready.

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• Controlling number of downloads on Amazon S3

  - by m7d

  Is there a way to control number of downloads of digital content on Amazon S3 or via some middle man software that talks to S3? I already use their timed links, but I would like to control number of downloads also. Any ideas of how to accomplish this using S3 or suggestions about alternative services that could? Thanks!

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• Emulating Amazon SQS during development

  - by pyo

  I'm quite interested in beginning some development using Amazon SQS, perhaps SimpleDB too, my question is this, are there any open source solutions that mimic the functionality, just for the purposes of development. I've already encountered the Eucalyptus project (http://open.eucalyptus.com) for creating an EC-esque cloud. I've not had any success with google, I suspect it's because the cost of entry is so inexpensive, but still, does anyone know of anything like this?

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• Send an XML message to Amazon SQS

  - by bartligthart

  I am a newbie to Amazon SQS and ruby on rails. And i am working on a project that some XML messages must be send to SQS. How do i do that? Now i have this in the controller after the .save def create @thing = Thing.new(params[:thing]) respond_to do |format| if @thing.save message = @thing.to_xml and in the model inputqueue.send_message(message) Is this the way i can send an XML file to SQS or??

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• Amazon S3 is not serving files correctly.

  - by Alexsander Akers

  I made this site for my friend and I uploaded it to an Amazon S3 bucket (http://ballard26.s3.amazonaws.com/index.html) and when I go to that site the page doesn't load correctly and I have no idea why. Any ideas?

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