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• AWS ELB as backend for Varnish Accelerator

  - by addisonj

  I am working on a large deployment on AWS that has high uptime requirements and variable loads throughout the day. Obviously, this is the perfect use case for ELB (Elastic Load Balancer) and autoscaling. However, we also rely on varnish for caching of API calls. My initial instinct was to structure the stack so that varnish uses ELB as a backend which in turn hits an appGroup. Varnish -> ELB -> AppServers However, according to a few sources that isn't possible as ELB constantly changes the IP address of its DNS hostname, which varnish caches on start, meaning changes to the IP won't be picked up by varnish. Reading around however, it looks like people are doing this so I am wondering what workarounds exist? Perhaps a script to reload the vcl periodically? In the case of where this is really just not a good idea, any idea of other solutions?

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• cannot connect to MS FTP 7.5 on Windows 2008 on Amazon EC2 instance

  - by minerj

  I have just installed the MS FTP 7.5 upgrade on my Windows 2008 Server (Service Pack 2) running on an Amazon EC2 instance. In the FTP Firewall Support settings for the server in IIS Manager I have set up the passive port range 45001 - 45005 and also set the External Firewall IP address to match the assigned Amazon Elastic IP address. Using the AWS Console I changed the Security Group for the server to allow access to the server through ports 21 and 45001 through 45005. Using an FTP client (either the command line FTP client or Windows Explorer) on the Amazon server I can connect to the FTP server but I cannot connect with an external FTP client. When I checked to see which ports were open on the server using Shields Up it shows that port 21 is open but ports 45001 to 45005 are closed. I assume I'm missing something. Any help greatly appreciated.

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• Ejabberd Clustering on EC2

  - by Architact

  I am trying to implement ejabberd clustering on Amazon EC2 instances, I have installed ejabberd and it is working fine on both instances, I can connect and send message, my first server is a master server and has the FQDN of master.example.com, second server is a slave and has FQDN of slave.example.com. I have edited the ejabberdctl.cfg file on both instances changed INET_DIST_INTERFACE on both instances to the value returned by ifconfig changed ERLANG_NODE to [email protected] on master and [email protected] on slave. Now when I run this command on slave net_adm:ping('[email protected]'). it always returns pang response indicating that it can't reach the master server. I am looking for possible fixes for that. Things already done Both master and slave domains are pointing to their instances I even tried allocating elastic ip and assigning that to instances, but did not help either. Any help will be greatly appreciated.

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• Subdomain only accessible from one computer

  - by Edan Maor

  I recently added a wildcard A record to my domain (*.root.com), mapping it to a certain elastic ip on AWS. I've configured apache to redirect all references to something.root.com to root.com, except for one specific "dev" subdomain, which is hosting its own site (a Django app, specifically). The Problem: This setup works perfectly for me on my computer. But on other computers around the office, it doesn't seem to work. Specifically, trying to visit dev.root.com gives an "unable to find server" error. Pinging dev.root.com gives a "cannot resolve hostname" error. The weird thing: pinging any other subdomain of root.com does work, from all machines. I would think this was all due to DNS propagation, except all the computers are behind the same office router, so how could that be the case? Any ideas?

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• Easy way to update apache on a server cluster with shared NFS conf?

  - by Simon

  we have a server setup where a server cluster connected with a db/files/conf server shared by nfs serve our sites, behind an Elastic Load Balancer at Amazon EC2. The setup works correctly, but keeping it up to date is becoming like hell, because the apache/php conf that webservers use is shared through NFS. So, if we try to run an apt-get upgrade on a server on the cluster, it will abort it due to the webserver is not able to write back the configuration to the nfs server. Every time we want to update the machines, or install a package like php-curl, we need to create a new ami, so the changes will reflect on the new launched amis. Could it be another way of doing the things simpler? Thanks in advance!

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• Is it secure to store the cert/key on a private AMI?

  - by Phillip Oldham

  Are there any major security implications to bundling a private AMI which contains the private key/certificate & environment variables? For resiliency I'm creating an EC2 image which should be able to boot and configure itself without any intervention. After boot it will attempt to: Attach & mount specific EBS volume(s) Associate a specific Elastic IP Start issuing backups of the EBS volume(s) to S3 However, to do this it will need the private key/pem files and will need certain environment variables to be available on start-up. Since this is a private AMI I'm wondering if it will be "safe" to store these variables/files directly in the image so that I don't need to specify any user-data information and can therefore start a new instance remotely (from my iPhone, if needed) should the instance be terminated for any reason.

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• Cheapest High Available Web Server [closed]

  - by xyz

  I would like to create a high-available setup (e.g. a small cluster) for a webserver, i.e. it will run Apache, PHP and MySQL. There will be between 2-8 small websites running with only very little traffic and workload. High availability is however very important. I don't want to be dependent on 1 datacenter, so there must be a minimum of 2 servers placed in different datacenters, and if one server goes down, the user must experience no or only a minimum of downtime - and no data loss. I have considered Amazon AWS using their Elastic Load Balancing, since it is possible to buy 2 EC2 instances in 2 availability zones and set up load balancing and RDS (Multi-AZ). However this seems rather expensive. Using the AWS price calculator http://calculator.s3.amazonaws.com/calc5.html it totals to 185$/month the first year (including the free tier). Are my calculations incorrect or is there a cheaper way to make this HA setup? Best regards

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• EC2 hostname ubuntu and ejabberd

  - by aelbaz

  I have questions related to the host name in Ubuntu EC2 instances. I have a IPS elastics for hosts that want to be seen from the internet and I have pointed out in the DNS entries with the computer name to those ips. For example, for elastic IP 11.11.11.11 DNS I added my computer name www.example.com. But I also want to rename the machines which they have, because it is a parameter of the service running on them (ejabberd server). EC2 instances are restarted when changing the host name, and seen on the client requesting dhcp hostname to dhcp Amazon. My question is ... What is the safest method to change the hostname: dhcp client modify, insert the command in rc.local, etc. ..? Could I have a problem with the internal resolution of traffic between EC2 instances? thanks

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• How to Access an AWS Instance with RDC when behind a Private Subnet of a VPC

  - by dalej

  We are implementing a typical Amazon VPC with Public and Private Address - with all servers running the Windows platform. The MS SQL instances will be on the private subnet with all IIS/web servers on the public subnet. We have followed the detailed instructions at Scenario 2: VPC with Public and Private Subnets and everything works properly - until the point where you want to set up a Remote Desktop Connection into the SQL server(s) on the private subnet. At this point, the instructions assume you are accessing a server on the public subnet and it is not clear what is required to RDC to a server on a private subnet. It would make sense that some sort of port redirection is necessary - perhaps accessing the EIP of the Nat instance to hit a particular SQL server? Or perhaps use an Elastic Load Balancer (even though this is really for http protocols)? But it is not obvious what additional setup is required for such a Remote Desktop Connection?

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• How to address an EC2 instance from both inside and outside datacenter?

  - by Alexandr Kurilin

  I'm trying to find a good way of being able to address my EC2 database instance from both inside and outside of the datacenter. Other EC2 instances need to be able to call into it, and other clients like pgAdmin might need to connect to it from the outside world as well. It's my understanding that using the internal and external DNS names is sustainable long term as each reboot leads to a change. I'm thinking of associating an Elastic IP with the instance and giving it an A record (say db1.mydomain.com) which I then will use both within and outside the datacenter. Further instances in the same role will get the same treatment and a DNS record of db2.mydomain.com etc. Now, is there a cleaner and more stable way of achieving this result? Am going about this the wrong way? Suggestions?

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• Does setting an A record for a root domain set it (automatically) for subdomains?

  - by Edan Maor

  I bought a domain from Dreamhost, but my servers are actually running on Amazon's AWS. I have an Elastic IP, say 1.1.1.1. In the Dreamhost panel, I've added an A record for my domain name, pointing it to 1.1.1.1. My question is, are all subdomains (e.g. www.mydomain.com, a.mydomain.com, etc.) automatically mapped to 1.1.1.1 as well, because the root is? Or do I have to add separate rules for each subdomain?

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• Our server hosting provider asked for our root password

  - by Andreas Larsson

  I work at a company that develops and hosts a small business critical system. We have an "Elastic cloud server" from a professional hosting provider. I recently got an email from them saying that they've had some problems with their backup solution and that they needed to install a new kernel. And they wanted us to send them the root password so they could do this work. I know that the email came from them. It's not [email protected] or anything like that. I called them and asked them about this, and they were like "yep, we need the password to do this". It just seems odd to send the root password over email like this. Do I have any reason to be concerned?

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• How do I configure namecheap for "arbitrarily-nested" wildcard subdomains?

  - by rabidsnail

  I'm trying to set up something like nyud.net, where any arbitrary chain of subdomains resolves to the same CNAME record (which in my case points to an amazon elastic load balancer). Ex: www.gogle.com.nyud.net:8080 points to one of their cache servers, which looks at the HOST header and returns www.google.com. I'm using namecheap as my dns host. Adding a CNAME record for *.mydomain.com doesn't seem to do anything (nslookup gives NXDOMAIN for all subdomains). What do I have to do to set this up? Do I have to use something fancier than namecheap (like route53)?

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• Swap files in Cloud Infrastructures

  - by ffeldhaus

  At our company we set up an OpenStack Cloud and are currently creating internal guidelines for creation of OS templates / images. One controversial topic was if we should provide swap inside the VM templates. Therefore I'd like to ask the following questions From an elastic Cloud provider point of view, does it make sense to offer swap partitions / files in the VM templates or is swap not needed when a VM can be resized? Which scenarios necessarily demand a swap file to be present? What kind of Storage should be used for swap files (e.g. local / central, FC / iSCSI / NFS)? Are there any best practices for offering swap files in a performant way in Cloud Infrastructures?

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• How do I correctly display special characters in my Firefox browser?

  - by BrianH

  (Firefox 3.6.13 on Windows XP) Every once in a while I notice an odd character on certain web pages when browsing the web. It is a outline of a box with a 4-digit number inside. And example of a page that has these characters is: http://aws.amazon.com/ec2/#highlights After each section heading (Elastic, Completely Controlled, ...) I see a box with the number "0096" inside. I looked at the cached version on Google, and google has &ndash; in it's place, so I'm guessing I should be seeing a dash there instead of the box with the numbers in it. I have tried changing the character encoding in Firefox but haven't been able to find one that shows these characters correctly. Is there a way to allow Firefox to view these characters? Thanks in advance!

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• Proxy between data centers [closed]

  - by dstarh

  Possible Duplicate: Can IIS be configure to forward request to another web server? We are switching data centers (actually datac-center to EC2 to be specific) and some customers have not yet made DNS changes to point the domains to the new load balancers. We are thinking of leaving the existing servers up and just using a proxy server to forward the request to the new load balancer. Can anyone recommend a good proxy server for doing this I've got squid installed but it seems it's fairly easy to just have a fairly wide open proxy server and we don't want this. I want all requests coming in on port 80 to be sent to port 80 at a specific domain (elastic load balancer) the data center env is windows 2k3 and the EC2 env will all be linux but the ec2 env should be irrelevant

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• Uptime concerns in case of AWS outage

  - by Aditya Patawari

  I am running an Elastic Load Balancer backup by 2 instances in different Availability Zones in US East. I am using Multi-AZ RDS as well. Ideally this should ensure that if one AZ goes down, it should not effect the app because everything is spread across multiple AZs. But the recent AWS outage took the app down for a long time. I am not sure how this can happen. It would be great if someone can point out what went wrong. Major question here I have is how can I avoid this in future? I can setup app servers across different regions or even providers and use DNS for load balancing but what do I do with MySQL? Read Replicas will introduce some lag which I would want to avoid.

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• EC2: map multiple applications to different domains

  - by EsseTi

  i'm playing with EC2 and i've been able to create my instance that has a django appliacation on port 80, and a tomcat on 8080. now, with elastic IP i can manage to redirect my domain to django application. now i would like to map subdomains to each tomact applications. for example django app (ec2...:80) --> mydomain.com tomcat (ec2...:8080) --> tomcat.mydomain.com webbapp1 (ec2...:8080/webapp1/) --> webapp1.mydomain.com is this possible with the free account? ciao

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• Load balanced proxies to avoid an API request limit

  - by ClickClickClick

  There is a certain API out there which limits the number of requests per day per IP. My plan is to create a bunch of EC2 instances with elastic IPs to sidestep the limitation. I'm familiar with EC2 and am just interested in the configuration of the proxies and a software load balancer. I think I want to run a simple TCP Proxy on each instance and a software load balancer on the machine I will be requesting from. Something that allows the following to return a response from a different IP (round robin, availability, doesn't really matter..) eg. curl http://www.bbc.co.uk -x http://myproxyloadbalancer:port Could anyone recommend a combination of software or even a link to an article that details a pleasing way to pull it off? (My client won't be curl but is proxy aware.. I'll be making the requests from a Ruby script..)

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• Social Shopping

  - by David Dorf

  I've written about various breeds of social shopping in the past, so I decided to give some thought into a categorization with examples. Below I've listed the different types of social shopping I've observed and some companies that support them. Comments and Ratings -- Commenting on products has been around almost as long as e-commerce. Two popular players in this space are BazaarVoice and PowerReviews. Most shoppers prefer relying on peer reviews rather than retailer descriptions, so the influence over sales is very strong. f-commerce -- A new term that was sure to rear its ugly head when retailers started allowing shopping on Facebook, And its all Elastic Path and Alvenda's fault! Co-shopping -- Retailers like Wet Seal are enabling multiple people to shop together online. This is particularly applicable to fashion, where the real-time exchange of opinions is important. I actually tried this with a co-worker and its pretty cool. Bragging -- Blippy is Twitter for shoppers, allowing purchases to be "tweeted" so you can keep up with your friends. I get alerted when friends download music or apps from iTunes because chances are I'll be interested as well. This covert influence is one-up'ed by Snatter, a service that gives people discounts for tweeting or posting promotions from retailers. This is the petri dish of viral marketing. Advice -- Combine the bragging of Blippy and the opinions from BazaarVoice and you'd get ShopSocially, a social network dedicated to spreading product knowledge amongst informed shoppers. I'm sure if I gave it more thought, a few more types would come to mind, but I've got to get back to work. Now is not the time to be blogging at Oracle!

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• Oracle Announces Oracle Big Data Appliance X3-2 and Enhanced Oracle Big Data Connectors

  - by jgelhaus

  Enables Customers to Easily Harness the Business Value of Big Data at Lower Cost Engineered System Simplifies Big Data for the Enterprise Oracle Big Data Appliance X3-2 hardware features the latest 8-core Intel® Xeon E5-2600 series of processors, and compared with previous generation, the 18 compute and storage servers with 648 TB raw storage now offer: 33 percent more processing power with 288 CPU cores; 33 percent more memory per node with 1.1 TB of main memory; and up to a 30 percent reduction in power and cooling Oracle Big Data Appliance X3-2 further simplifies implementation and management of big data by integrating all the hardware and software required to acquire, organize and analyze big data. It includes: Support for CDH4.1 including software upgrades developed collaboratively with Cloudera to simplify NameNode High Availability in Hadoop, eliminating the single point of failure in a Hadoop cluster; Oracle NoSQL Database Community Edition 2.0, the latest version that brings better Hadoop integration, elastic scaling and new APIs, including JSON and C support; The Oracle Enterprise Manager plug-in for Big Data Appliance that complements Cloudera Manager to enable users to more easily manage a Hadoop cluster; Updated distributions of Oracle Linux and Oracle Java Development Kit; An updated distribution of open source R, optimized to work with high performance multi-threaded math libraries Read More   Data sheet: Oracle Big Data Appliance X3-2 Oracle Big Data Appliance: Datacenter Network Integration Big Data and Natural Language: Extracting Insight From Text Thomson Reuters Discusses Oracle's Big Data Platform Connectors Integrate Hadoop with Oracle Big Data Ecosystem Oracle Big Data Connectors is a suite of software built by Oracle to integrate Apache Hadoop with Oracle Database, Oracle Data Integrator, and Oracle R Distribution. Enhancements to Oracle Big Data Connectors extend these data integration capabilities. With updates to every connector, this release includes: Oracle SQL Connector for Hadoop Distributed File System, for high performance SQL queries on Hadoop data from Oracle Database, enhanced with increased automation and querying of Hive tables and now supported within the Oracle Data Integrator Application Adapter for Hadoop; Transparent access to the Hive Query language from R and introduction of new analytic techniques executing natively in Hadoop, enabling R developers to be more productive by increasing access to Hadoop in the R environment. Read More Data sheet: Oracle Big Data Connectors High Performance Connectors for Load and Access of Data from Hadoop to Oracle Database

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• Consolidating and Virtualizing with Oracle&rsquo;s Network Fabric

  - by Ferhat Hatay

  Server, storage and operating system virtualization technologies are already widely  deployed within datacenters, and are considered an integral component to drive cost  savings and agility. These technologies are now being combined with network  virtualization to usher in a new era of cloud computing. Oracle provides a networking fabric that delivers cloud-ready network services based on  Ethernet or InfiniBand fabrics that are tightly integrated with application infrastructure. Oracle’s network fabric provides the performance and manageability required for any  Oracle application environment or private cloud infrastructure. Logical architecture of Oracle’s network fabric. Oracle’s unique ability to deliver extreme performance and scale by tightly integrating  network services across application infrastructure is demonstrated in the Oracle Exalogic  Elastic Cloud and the Oracle Exadata Database Machine. These engineered solutions  offer up to 5X and 10X performance gains respectively compared to traditional multivendor architectures where the offerings are not engineered to work together. By integrating advanced networking capabilities across the entire hardware and software  stack, Oracle’s network fabric can help maximize application performance and scale,  reduce the number of network components, and simplify datacenter operations through  integrated network management and orchestration. The resulting business benefits are: Reduced acquisition costs Lower power and cooling costs Reduced management costs Faster deployment Greater agility in meeting changing business needs For more information see the whitepaper: Consolidating and Virtualizing Datacenter Networks with Oracle's Network Fabric.

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• Oracle VM Blade Cluster Reference Configuration

  - by Ferhat Hatay

  Today we are happy to announce the availability of the Oracle VM blade cluster reference configuration for Sun Blade 6000 modular systems.  The new Oracle VM blade cluster reference configuration can help reduce the time to deploy virtual infrastructure by up to 98 percent when compared to multi-vendor configurations. Oracle's virtualization strategy is to simplify the deployment, management, and support of the enterprise stack from application to disk. The Oracle VM blade cluster reference configuration is a single-vendor solution that addresses every layer of the virtualization stack with Oracle hardware and software components. It enables quick and easy deployment of the virtualized infrastructure using components that have been tested together and are all supported together by one vendor — Oracle. All components listed in the reference configuration have been tested together by Oracle, reducing the need for customer testing and the time-consuming and complex effort of designing and deploying a stable configuration. Benefitting from pre-installed Oracle VM Server for x86 software on Oracle’s highly scalable and reliable Sun Blade servers with built-in networking and Oracle’s Sun ZFS Storage Appliance product line, the configuration provides high availability via the blade cluster as well as a documented best practice guide that helps reduce deployment time and cost for customers implementing highly virtualized applications or private cloud Infrastructure as a Service (IaaS) architectures. To further support easier, faster and lower-cost deployments, Oracle Linux, Oracle Solaris and Oracle VM are available for pre-install on select Sun x86 systems, and Oracle VM Templates are available for download for Oracle Applications, Oracle Fusion Middleware, Oracle Database, Oracle Real Application Clusters, and many other Oracle products. Key benefits of the Oracle VM blade cluster reference configuration include: Faster time to value – Begin deploying applications immediately because the optimized software stack is pre-configured for best practices and is ready-to-run on the recommended hardware platforms. Reduced deployment cost and risk – The entire hardware and software stack has been tested and is supported together by Oracle. Elastic scalability – As capacity needs grow, the system can be easily scaled in multiple dimensions with the ability to add compute, storage, and networking resources independently. For more information, see: Oracle white paper: Accelerating deployment of virtualized infrastructures with the Oracle VM blade cluster reference configuration Oracle technical white paper: Best Practices and Guidelines for Deploying the Oracle VM Blade Cluster Reference Configuration

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• Silverlight Cream for April 25, 2010 -- #847

  - by Dave Campbell

  In this Issue: Michael Washington, David Poll, Andrea Boschin, Kunal Chowdhury(-2-), Lee, and Chad Campbell. Shoutout: Not at all Silverlight, but Kirupa has a great article up about Elastic Collisions From SilverlightCream.com: Easily decouple your MVVM ViewModel from your Model using RX Extensions Michael Washington continues with his Simplified MVVM and uses Rx to allow him to put web service methods in the model and call them from the ViewModel. A “refreshing” Authentication/Authorization experience with Silverlight 4 David Poll expands on his previous post and demonstrates returning the user to the page prior to the login, just the way you'd like it. Using a PollingDuplex service to handle long running activities Andrea Boschin is back discussing PollingDuplex again, this time is discussing getting updates from a long-running process. Introduction to Silverlight - Silverlight tutorials Chapter 1 Kunal Chowdhury has an intro to Silverlight Tutorial that looks good... if you're just getting started, here's a place to look. Introduction to Silverlight Application Development - Silverlight tutorial Chapter 2 In his 2nd introductory tutorial, Kunal Chowdhury gets into code and discusses User Controls. Drag and Drop grouping in Datagrid Lee has a post up where he's taken a DataGrid and produced some of the features of some of the 3rd-party controls, specifically dragging column headers to a place above the grid to sort the grid. Silverlight – HTTP request to [Url] was aborted. …local channel being closed while the request was still in progress Chad Campbell is addressing timeout problems you may hit with connecting up to your WCF service. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Ground Control by David Baum

  - by JuergenKress

  As cloud computing moves out of the early-adopter phase, organizations are carefully evaluating how to get to the cloud. They are examining standard methods for developing, integrating, deploying, and scaling their cloud applications, and after weighing their choices, they are choosing to develop and deploy cloud applications based on Oracle Cloud Application Foundation, part of Oracle Fusion Middleware. Oracle WebLogic Server is the flagship software product of Oracle Cloud Application Foundation. Oracle WebLogic Server is optimized to run on Oracle Exalogic Elastic Cloud, the integrated hardware and software platform for the Oracle Cloud Application Foundation family. Many companies, including Reliance Commercial Finance, are adopting this middleware infrastructure to enable private cloud computing and its convenient, on-demand access to a shared pool of configurable computing resources. “Cloud computing has become an extremely critical design factor for us,” says Shashi Kumar Ravulapaty, senior vice president and chief technology officer at Reliance Commercial Finance. “It’s one of our main focus areas. Oracle Exalogic, especially in combination with Oracle WebLogic, is a perfect fit for rapidly provisioning capacity in a private cloud infrastructure.” Reliance Commercial Finance provides loans to tens of thousands of customers throughout India. With more than 1,500 employees accessing the company’s core business applications every day, the company was having trouble processing more than 6,000 daily transactions with its legacy infrastructure, especially at the end of each month when hundreds of concurrent users need to access the company’s loan processing and approval applications. Read the complete article here. WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: WebLogic,WebLogic Community,Oracle,OPN,Jürgen Kress

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