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  • CDN Rerouting on 404 (file not yet in synch with original storage)

    - by Alan Ristic
    Here is the problem. I've setup my app(on EC2) to store uploaded images directly on Amazon S3. I'd like to be able to serve static files(cdn) from my 'home' server so I wrote script that does sync from S3. But there is a window of (at least) one minute in synch. Now I see two solutions on the problem of pics not been available on 'home' server here: 1.I write script on EC2 (where the app resides) to fetch from DB pics that have status of "not-yet-synch", which is default state when user uploads picture. The script then does a ping to picture and if it gets OK response, updates DB from "not-yet-synch" to "synch". 2.Prefered solution would be to let apache (in this case) redirect request for an image if it sees 404 (e.g. doesent find image requested) to S3. This way I wouldn't need script from solution 1. So what approach do you suggest I take in solving this redundancy problem? Or what is practice in production environments? To further clarify; I'd like so serve images first from 'home' server, if that fails serve them from S3. Tnx, Alan

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  • Cloudfront - How to invalidate objects in a distribution that was transformed from secured to public?

    - by Gil
    The setting I have an Amazon Cloudfront distribution that was originally set as secured. Objects in this distribution required a URL signing. For example, a valid URL used to be of the following format: https://d1stsppuecoabc.cloudfront.net/images/TheImage.jpg?Expires=1413119282&Signature=NLLRTVVmzyTEzhm-ugpRymi~nM2v97vxoZV5K9sCd4d7~PhgWINoTUVBElkWehIWqLMIAq0S2HWU9ak5XIwNN9B57mwWlsuOleB~XBN1A-5kzwLr7pSM5UzGn4zn6GRiH-qb2zEoE2Fz9MnD9Zc5nMoh2XXwawMvWG7EYInK1m~X9LXfDvNaOO5iY7xY4HyIS-Q~xYHWUnt0TgcHJ8cE9xrSiwP1qX3B8lEUtMkvVbyLw__&Key-Pair-Id=APKAI7F5R77FFNFWGABC The distribution points to an S3 bucket that also used to be secured (it only allowed access through the cloudfront). What happened At some point, the URL singing expired and would return a 403. Since we no longer need to keep the same security level, I recently changed the setting of the cloudfront distribution and of the S3 bucket it is pointing to, both to be public. I then tried to invalidate objects in this distribution. Invalidation did not throw any errors, however the invalidation did not seem to succeed. Requests to the same cloudfront URL (with or without the query string) still return 403. The response header looks like: HTTP/1.1 403 Forbidden Server: CloudFront Date: Mon, 18 Aug 2014 15:16:08 GMT Content-Type: text/xml Content-Length: 110 Connection: keep-alive X-Cache: Error from cloudfront Via: 1.1 3abf650c7bf73e47515000bddf3f04a0.cloudfront.net (CloudFront) X-Amz-Cf-Id: j1CszSXz0DO-IxFvHWyqkDSdO462LwkfLY0muRDrULU7zT_W4HuZ2B== Things I tried I tried to set another cloudfront distribution that points to the same S3 as origin server. Requests to the same object in the new distribution were successful. The question Did anyone encounter the same situation where a cloudfront URL that returns 403 cannot be invalidated? Is there any reason why wouldn't the object get invalidated? Thanks for your help!

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  • Amazon java.lang.VerifyError Android

    - by easycheese
    I have been trying to submit 2 separate apps into the Amazon App store but they keep being rejected. Here is the stack trace for the first: 11-05 11:14:36.488 E/AndroidRuntime(28128): FATAL EXCEPTION: AsyncTask #1 11-05 11:14:36.488 E/AndroidRuntime(28128): java.lang.RuntimeException: An error occured while executing doInBackground() 11-05 11:14:36.488 E/AndroidRuntime(28128): at android.os.AsyncTask$3.done(AsyncTask.java:200) 11-05 11:14:36.488 E/AndroidRuntime(28128): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) 11-05 11:14:36.488 E/AndroidRuntime(28128): at java.util.concurrent.FutureTask.setException(FutureTask.java:124) 11-05 11:14:36.488 E/AndroidRuntime(28128): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) 11-05 11:14:36.488 E/AndroidRuntime(28128): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 11-05 11:14:36.488 E/AndroidRuntime(28128): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068) 11-05 11:14:36.488 E/AndroidRuntime(28128): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561) 11-05 11:14:36.488 E/AndroidRuntime(28128): at java.lang.Thread.run(Thread.java:1096) 11-05 11:14:36.488 E/AndroidRuntime(28128): Caused by: java.lang.VerifyError: com.companionfree.WLThemeViewer.AmazonClientManager 11-05 11:14:36.488 E/AndroidRuntime(28128): at com.companionfree.WLThemeViewer.UpdateDBs.doInBackground(UpdateDBs.java) 11-05 11:14:36.488 E/AndroidRuntime(28128): at com.companionfree.WLThemeViewer.UpdateDBs.doInBackground(UpdateDBs.java) 11-05 11:14:36.488 E/AndroidRuntime(28128): at android.os.AsyncTask$2.call(AsyncTask.java:185) 11-05 11:14:36.488 E/AndroidRuntime(28128): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 11-05 11:14:36.488 E/AndroidRuntime(28128): ... 4 more And the relevant logcat for the second 10-12 15:41:48.929 D/dalvikvm( 2451): GC_FOR_MALLOC freed 8099 objects / 524416 bytes in 34ms 10-12 15:41:49.327 I/RPC ( 1563): rx thread timeout (1 clients): 10-12 15:41:49.828 I/RPC ( 1563): rx thread timeout (1 clients): 10-12 15:41:50.089 I/ActivityManager( 1563): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10200000 cmp=com.companionfree.pushup/.MainScreen } 10-12 15:41:50.099 D/SurfaceFlinger( 1563): Layer::setBuffers(this=0xeafa50), pid=1563, w=1, h=1 10-12 15:41:50.099 D/SurfaceFlinger( 1563): Layer::setBuffers(this=0xeafa50), pid=1563, w=1, h=1 10-12 15:41:50.139 D/SurfaceFlinger( 1563): Layer::requestBuffer(this=0xeafa50), index=0, pid=1563, w=480, h=800 success 10-12 15:41:50.189 I/ActivityManager( 1563): Start proc com.companionfree.pushup for activity com.companionfree.pushup/.MainScreen: pid=2644 uid=10129 gids={1015, 3003} 10-12 15:41:50.319 I/RPC ( 1563): rx thread timeout (1 clients): 10-12 15:41:50.359 W/dalvikvm( 2644): VFY: Lcom/companionfree/pushup/WorkoutDbAdapter; is not instance of Landroid/app/Activity; 10-12 15:41:50.369 W/dalvikvm( 2644): VFY: bad arg 0 (into Landroid/app/Activity;) 10-12 15:41:50.369 W/dalvikvm( 2644): VFY: rejecting call to Lcom/amazon/android/Kiwi;.onActivityResult (Landroid/app/Activity;IILandroid/content/Intent;)Z 10-12 15:41:50.369 W/dalvikvm( 2644): VFY: rejecting opcode 0x71 at 0x0000 10-12 15:41:50.369 W/dalvikvm( 2644): VFY: rejected Lcom/companionfree/pushup/WorkoutDbAdapter;.onActivityResult (IILandroid/content/Intent;)V 10-12 15:41:50.369 W/dalvikvm( 2644): Verifier rejected class Lcom/companionfree/pushup/WorkoutDbAdapter; 10-12 15:41:50.369 D/AndroidRuntime( 2644): Shutting down VM 10-12 15:41:50.369 W/dalvikvm( 2644): threadid=1: thread exiting with uncaught exception (group=0x40025a70) 10-12 15:41:50.369 E/AndroidRuntime( 2644): FATAL EXCEPTION: main 10-12 15:41:50.369 E/AndroidRuntime( 2644): java.lang.VerifyError: com.companionfree.pushup.WorkoutDbAdapter 10-12 15:41:50.369 E/AndroidRuntime( 2644): at com.companionfree.pushup.MainScreen.onCreateMainScreen(MainScreen.java) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at com.companionfree.pushup.MainScreen.onCreate(MainScreen.java) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1088) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2802) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2859) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at android.app.ActivityThread.access$2300(ActivityThread.java:136) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2179) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at android.os.Handler.dispatchMessage(Handler.java:99) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at android.os.Looper.loop(Looper.java:143) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at android.app.ActivityThread.main(ActivityThread.java:5073) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at java.lang.reflect.Method.invokeNative(Native Method) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at java.lang.reflect.Method.invoke(Method.java:521) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 10-12 15:41:50.369 E/AndroidRuntime( 2644): at dalvik.system.NativeStart.main(Native Method) 10-12 15:41:50.379 W/ActivityManager( 1563): Force finishing activity com.companionfree.pushup/.MainScreen 10-12 15:41:50.399 D/SurfaceFlinger( 1563): Layer::setBuffers(this=0xeff6b8), pid=1563, w=1, h=1 10-12 15:41:50.399 D/SurfaceFlinger( 1563): Layer::setBuffers(this=0xeff6b8), pid=1563, w=1, h=1 10-12 15:41:50.419 D/SurfaceFlinger( 1563): Layer::requestBuffer(this=0xeff6b8), index=0, pid=1563, w=480, h=337 success 10-12 15:41:50.469 D/dalvikvm( 2451): GC_FOR_MALLOC freed 7889 objects / 521072 bytes in 105ms 10-12 15:41:50.819 I/RPC ( 1563): rx thread timeout (1 clients): I see the same verify error on both but I can't figure it out. The only common library used between the 2 apps is the FlurryAgent.jar for analytics. For the top app I have For the bottom app I have in the manifests. The only information I have been able to find out is about libraries (GSON) and needing to use dx but I am using Eclipse so that doesn't help. To make this more difficult, the error does NOT occur on the Android Market. Yet the testers at Amazon say that it FC 5/5 times on each of their devices (I tried using an emulator for their test devices and they worked fine). I know they use "wrapper" code around my app and I think it must be interfering in some way. Does anyone have any experience with this?

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  • Setup a Reverse Proxy with Nginx and Apache on EC2

    - by heavymark
    Good Day, I am currently using the free Amazon EC2 micro instance to learn Linux and server setup. I wish to setup Nginx as a reverse web proxy. I found a great article on mediatemple on how to do it: http://wiki.mediatemple.net/w/Using_Nginx_as_a_Reverse_Web_Proxy The directions work for most any server except for EC2.One difference between EC2 and MediaTemple is how IPs work. Overall EC2 instances do not know their elastic IP. So when following the wiki directions in the virtual hosts for instance instead of myip:80 for instance I put *:80. When just using Apache this works perfectly. In the apache virtual hosts I did "127.0.0.1:80" and in the Nginx I put *:80. Apache restarts, by Nginx provides an error that it cannot bind because the ip is already in use. If I could add an actual IP in the Nginx file it would work but since EC2 requires me to put in the asterisk it ends up conflicting with the apache virtual hosts entry. Anyone know a simple way around this (other than not using EC2) ;-) Thank you! Cheers, Christopher

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  • Monitoring AWS Systems Behind ElasticBeanStalk

    - by A. Avadis
    So I'm getting a company set up in the Amazon Cloud -- creating IAAS protocol/solutions/standardized implementation, etc while also being the SysAdmin for individual systems, app environments, and day-to-day uptime. One of the biggest issues I'm having is tracking various system/application logs, as well as logging/monitoring/archiving system metrics like memory usage, cpu usage, etc etc In a centralized fashion. E.g. -- Nagios + Urchin. The BIGGEST impediment to my endeavors is the following: The company application is deployed in the form of a Java *.WAR file, uploaded to an Elastic BeanStalk application environment, load balancing and auto-scaling between 3(min) and 10(max) servers, and the EC2's that run the application are fired up and disposed of ad-hoc. That is to say, I can't monitor the individual EC2's for very long because so many are being terminated then auto-provisioned/auto-scaled on the fly -- so I'd constantly be having to "monitor what I'm monitoring", and continuously remove/add EC2 machine addresses to my monitoring lists. IS there some sort of way to use monitoring tools like Zabbix or Nagios to monitor the ElasticBeanStalk, and have it automatically add on new EC2's, and remove terminated/failed EC2's from its monitoring list automatically? Furthermore, is there anything I can do with GrayLog to achieve similar results with the aggregation/centralization of my application logs from multiple EC2 instances into ONE consolidated set of logs/events? If not GrayLog, is there ANYTHING LIKE GrayLog that can automatically detect what EC2 members are being added/removed from the environment, and collect the logs from them automatically? Any and all advice or direction is appreciated. Thanks much, and cheers!!

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  • How to make the ec2 ami work on the Xen on Debian

    - by user67103
    Hi. Here is the scenario. We are creating a cloud App. We have a Debian on which we create a customized image and upload it to the Amazon EC2. After uploading it to the cloud we have made some more customizations and are trying to rebundle it. We are facing some issues in rebundling it. We would like to know if we could do something like this. a. Create an AMI Image on Debian b. Load it on to the Xen Hypervisor which would be over the Debian c. Customize the image d. Save the customized image e. Upload it to EC2. The issue is that I am unable to find a proper solution on how to install Xen on Debian and will the AMI on Xen work on EC2. Any suggestions/Help would be greatly appreciated. thanks. Krishna

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  • SQL queries break our game! (Back-end server is at capacity)

    - by TimH
    We have a Facebook game that stores all persistent data in a MySQL database that is running on a large Amazon RDS instance. One of our tables is 2GB in size. If I run any queries on that table that take more than a couple of seconds, any SQL actions performed by our game will fail with the error: HTTP/1.1 503 Service Unavailable: Back-end server is at capacity This obviously brings down our game! I've monitored CPU usage on the RDS instance during these periods, and though it does spike, it doesn't go much over 50%. Previously we were on a smaller instance size and it did hit 100%, so I'd hoped just throwing more CPU capacity at the problem would solve it. I now think it's an issue with the number of open connections. However, I've only been working with SQL for 8 months or so, so I'm no expert on MySQL configuration. Is there perhaps some configuration setting I can change to prevent these queries from overloading the server, or should I just not be running them whilst our game is up? I'm using MySQL Workbench to run the queries. Here's an example.... SELECT * FROM BlueBoxEngineDB.Transfer WHERE Amount = 1000 AND FromUserId = 4 AND Status='Complete'; As you can see, it's not overly complex. There are only 5 columns in the table. Any help would be very much appreciated - Thanks!

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  • Amazon Linux AMI release 2010.11.1 corresponds to which RHEL version (4/5/6)?

    - by Jayesh
    I am using the default Amazon Linux AMI in an EC2 instance - Amazon Linux AMI release 2010.11.1. I can see that it's a Redhat based system, but after trying many tools (/etc/issues, uname -a, lsb_release), I cannot tell which version of RHEL or CentOS is it based on. I need to get some packages that are not available in Amazon's package repos. I have list of custom yum repos that I can use, but since I don't know which RHEL version is the Amazon AMI based on, I cannot choose from different versions of repos. How can I find whether it's running RHEL 4/5/6 (or their CentOS counterparts)?

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  • Thoughts on GoGrid vs EC2

    - by Jason
    I am currently hosting my SaaS application at GoGrid (Microsoft stack). Here's what I have: Database Server - physical box, 12 GB RAM, 2 X Quad Core CPU (2.13 GHz Xeon E5506) 2 Web / App servers - cloud servers, 2 GB RAM, 2 VCPUs 300 GB monthly bandwidth I am paying around $900 / month for this. My web / app servers are busting at the seams and need to be upgraded to 4 GB of RAM. I also need a firewall, and GoGrid just added this service for an additional $200. After the upgrade, I will be paying around $1,400. I started looking at Amazon EC2, specifically this config: Database server - "High Memory Double Extra Large Instance" - 34 GB RAM, 13 EC2 compute units 2 Web / App servers - "Large Instance" - 7.5 GB RAM, 4 EC2 compute units If I go with 1 year reserved instances, my upfront cost would be $4,500 and my monthly would be $700. This comes to $1,075 / month when amortized. Amazon also includes a firewall for free. Here are my questions: Do any of you have experience running a database (especially SQL Server) on an EC2 instance? How did it perform compared to a dedicated machine? One of my major concerns is with disk I/O. Amazon's description of a compute unit is fairly vague. Any ideas on how the CPU performance on the database servers would compare? I am hoping that the Amazon solution will provide significantly better performance than my current or even improved GoGrid setup. Having a virtual database server would also be nice in terms of availability. Right now I would be in serious trouble if I had any hardware issues. Thanks for any insight...

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  • Alternative to Amazon’s S3 service?

    - by Cory
    Just wondering if there is good alternative to Amazon's S3 service? I like S3 but the bandwidth cost is high. I looked at CouldFiles from Rackspace but the cost is even higher. I don't mind prepaying or having monthly payment in order to reduce the bandwidth cost greatly. Thank you for any help

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  • install ejabberd on amazon

    - by cometta
    Hi, I app-get and success install ejabberd on amazon , mounted esb drive as /dev/sda , but then, i terminated the image and fire any new 'same image', attached my esb drive , all my previous installation was lost. anyway to persist my installation or files i added to the os?

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  • ISBN Search from google/amazon/isbndb

    - by parminder
    Hi Experts, I working on a website(ASP.NET C#) where I need to search for an item according to the ISBN. I am reading from Amazon webservice, google books api, isbndb etc. What is the best option, I should choose. At present my requirment is just to query the given ISBN. Help will be appretiated. Regards Parminder

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  • amazon web service

    - by ohana
    hi, i m trying to get books info from amazon and feed them to my own web app. the problem is it only returned 10 results, how can i get the results after the first 10? Thanks.

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  • Codeigniter or PHP Amazon API help

    - by faya
    Hello, I have a problem searching through amazon web servise using PHP in my CodeIgniter. I get InvalidParameter timestamp is not in ISO-8601 format response from the server. But I don't think that timestamp is the problem,because I have tryed to compare with given date format from http://associates-amazon.s3.amazonaws.com/signed-requests/helper/index.html and it seems its fine. Could anyone help? Here is my code: $private_key = 'XXXXXXXXXXXXXXXX'; // Took out real secret key $method = "GET"; $host = "ecs.amazonaws.com"; $uri = "/onca/xml"; $timeStamp = gmdate("Y-m-d\TH:i:s.000\Z"); $timeStamp = str_replace(":", "%3A", $timeStamp); $params["AWSAccesskeyId"] = "XXXXXXXXXXXX"; // Took out real access key $params["ItemPage"] = $item_page; $params["Keywords"] = $keywords; $params["ResponseGroup"] = "Medium2%2525COffers"; $params["SearchIndex"] = "Books"; $params["Operation"] = "ItemSearch"; $params["Service"] = "AWSECommerceService"; $params["Timestamp"] = $timeStamp; $params["Version"] = "2009-03-31"; ksort($params); $canonicalized_query = array(); foreach ($params as $param=>$value) { $param = str_replace("%7E", "~", rawurlencode($param)); $value = str_replace("%7E", "~", rawurlencode($value)); $canonicalized_query[] = $param. "=". $value; } $canonicalized_query = implode("&", $canonicalized_query); $string_to_sign = $method."\n\r".$host."\n\r".$uri."\n\r".$canonicalized_query; $signature = base64_encode(hash_hmac("sha256",$string_to_sign, $private_key, True)); $signature = str_replace("%7E", "~", rawurlencode($signature)); $request = "http://".$host.$uri."?".$canonicalized_query."&Signature=".$signature; $response = @file_get_contents($request); if ($response === False) { return "response fail"; } else { $parsed_xml = simplexml_load_string($response); if ($parsed_xml === False) { return "parse fail"; } else { return $parsed_xml; } } P.S. - Personally I think that something is wrong in the generation of the from the $string_to_sign when hashing it.

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  • Amazon EC2 php/fedora htaccess mod_rewrite not working

    - by wes
    Amazon EC2 with Fedora, there are 2 instances of the httpd conf, the doc root is automatically set as /home/webuser/helloworld/conf/httpd.conf and the default (which is also there) is /etc/httpd/conf/httpd.conf . Mod rewrite is enabled with both, we are in drupal, the .htaccess is in the folder it needs to be (on Drupal) and it loads the homepage and other static files fine, but it WILL not use htaccess. Any thoughts?

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  • Memcached Latency in Amazon EC2

    - by user365941
    Hi, I am planning to use Amazon EC2 host only for MemCache.My web application ll be residing on shared hosted server and will be communicating to Ec2 for querying Memcache. How would be the performance of this setup. Regards, Mugil.

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  • Amazon WebStore hide/disable/remove

    - by Paul
    Hey guys, I'm new to template editting. I'm trying to remove a table from the Amazon's WebStore template so i can start designing my own. Anyone out there know how I can go about hiding/disabling/removing/bypassing it?

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  • Accessing Amazon E-Commerce Services through Cocoa Touch

    - by Gregory Hill
    Has anyone successfully accessed AWS (Amazon E-Commerce Services) through Cocoa Touch? I've been digging around, and haven't seen the issue addressed directly. I've created an AWS account, and have seen some sample code for accessing web services through Cocoa, but I'm not quite sure how to tie it all together. If anyone has any sample code, I'd love to see it. I'm just trying to get my head around the concepts.

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