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  • How to put 1000 lightweight server applications in the cloud

    - by Dan Bird
    The company I work for sells a commercial desktop/server app that runs on any non dedicated Windows PC or server and uses Tomcat for all interactions with the application. Customers are asking that we host their instance of the application so they don't have to run it locally on their own servers. The app is lightweight and an average server, in theory, could handle 25-50 instances before users would notice a slowdown. However only 1 instance can run per Windows instance (because the application writes to a common registry branch) so we'd need something like VMWare to create 25-50 Windows instances. We know we eventually need to reprogram to make it truly cloud-worthy but what would you recommend for a server farm or whatever for this? We don't have the setup to purchase our own servers so we must use a 3rd party. We have budgeted $500 - $1000 per year per customer for this service. Thanks in advance for your suggestions, experiences and guidance.

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  • isolate web servers on intranet with dfl-800

    - by microchasm
    I administer a small network (10 users). I'm getting ready to deploy a internal webapp that will be hosted and accessed locally only. There are about 10 users on the network (192.168.111.0/24), a win2k3 server, apache (RHEL), and Mysql (RHEL), and various miscellaneous peripheries. I'd like to isolate the apache and sql boxes into a seperate area of the lan to keep things easier to maintain/grow. I've been reading about vlans, subnets, etc.. I'm not clear, however, which would be the best solution for our setup. Thanks for any tips and or advice.

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  • Are EC2 security group changes effective immediately for running instances?

    - by Jonik
    I have an EC2 instance running, and it belongs to a security group. If I add a new allowed connection to that security group through AWS Management Console, should that change be effective immediately? Or perhaps only after restart of the instance? In my case, I'm trying to allow access to PostgreSQL's default port (tcp 5432 5432 0.0.0.0/0), and I'm not sure if it's the EC2 firewall or PostgreSQL's settings that are refusing the connection.

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  • Ubuntu firefox: some web-pages stuck on loading

    - by kristaps.skujins
    Just installed Ubuntu 10.04 beta, installation went fine and all programs are working smooth. Just this one weird network problem. Some sites simply are not opening and loading forever. For example, google.com and youtube are working well, but ubuntu.com and many other are not opening at all, or are loaded partly. One thing i noticed is that on all of those pages on firefox status bar is message "Looking up for www.google-analytics.com" (or similar remote resources) message appearing all the time (even on this page, but it somehow has loaded and working). I should mention that i tried those pages to open on windows OS on this same machine, and they opened without problems. So i am guessing that it has to be some sort of network configuration problems on Ubuntu. What could cause such problem?

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  • How to configure Amazon Security Groups to achieve multi-tier architecture?

    - by ks78
    What is the preferred way to configure Amazon Security Groups to achieve a multi-tier architecture? Each of my instances has its own Security Group, which I only want to use for rules specific to an instance. I'd like to keep any rules which apply to multiple instances in a separate Security Group, which can then be assigned to instance Security Groups as necessary. As an example, I've setup a group called "admin", which allows administrative access from my IP. I added the "admin" group as the source to each of my instance security groups. However, I still can't access the instances from my IP without adding the rules directly to the instance's group. Am I missing something? Although it seems a multi-tier security architecture should be possible, it doesn't seem to be working.

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  • Create image (EBS AMI) takes forever - possibly caused MySQL Server to break?

    - by fuzzybee
    I'm trying to create an EBS AMI from my running EC2 instance to reuse my LAMP fully configured (for my needs). I got my website up and running yesterday on this EC2 instance my MySQL was working fine until this morning (it's not that difficult to install LAMP thanks to yum so I can't see how I could go wrong with this; having said that, it's always difficult for one to realise his own errors) I have seen "Loading, please wait ..." for a few hours now. How do I know whether this is completed or its progress? Shortly after I tried to create the AMI image from my EC2 instance, I encountered database connection error can't connect to local mysql server through socket '/var/lib/mysql/mysql.sock' I was able to restart mysqld at first. But database connection was down again. This time, I could not restart mysqld anymore. It shows MySQL Daemon failed to start. Could my attempt to create the AMI by any chance cause the MySQL server to reboot or corrupt? I did a lot of searched and have done the following although I think I shouldn't have to do any workaround for MySQL server to work here chown -R mysql.mysql /var/lib/mysql/ I also found this workaround but I'm very reluctant to follow due to my belief and the fact I would need to understand this problem first. Any help would be greatly appreciated. Getting back to searching for a solution for the MySQL server problem ... Thanks, Eric

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  • web browser not opening

    - by Hoss7811
    I had a virus adware on my desktop. I cleaned it using AVG. Now no browser will open, though the Internet connection is fine. When trying to open any browser I get a dialog box that says it can't find that location. This happens to all my browsers. I even downloaded firefox on my laptop and installed it on the desktop and still get the same response - Windows can't find the location. This all started when opening an email. I'm running Windows Vista

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  • What is the cheapest non-colocation way to serve about 10 static files at a rate of 100 megabits per

    - by Mark Maunder
    I've looked at Amazon S3 and it costs roughly $4746 per month for 100 megabits/s (which translates into 31,640 Gigabytes of data transferred. That's at a rate of $0.15 per gig.) I haven't found a cheaper "cloud" option. I'm curious if there's any other cloud hosting option out there cheaper than S3. Uptime is not an issue because I can build failover for most things into the browser. e.g. I can use javascript to say "if the image didn't load then go to this other URL instead." FYI I'm currently using a colocation facility which is about 30% cheaper than S3 and I'm familiar with colo prices - so this question is really about "cloud" services and by that I mean services where I don't have to worry about the infrastructure.

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  • How to make google Chrome omnibar search sites permanent?

    - by tim
    In google Chrome, when you have visited a site, say wikipedia.com, your can thereafter search the site directly from the omnibar by typing in a few letters then hitting tab. However, I noticed that after I clear my cache, Chrome does not remember the search autofills, and I once again have to visit the site manually for it to take effect. Is there a way to make the omnibar searches permanent even after doing a full cache clear in google Chrome? Thanks. Update: I tried the suggestion below, but bookmarking the site just allowed me to autocomplete the address. It did not allow me the option to hit tab to do the search directly in the omnibar. Any suggestions?

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  • "iostat" command different in two equal machines

    - by Oz.
    We have several machines on Amazon (ec2) of the type c1.xlarge with 8 cpus, running the Amazon AMI. Details on the machine: 7 GB of memory 20 EC2 Compute Units (8 virtual cores with 2.5 EC2 Compute Units each) 1690 GB of instance storage 64-bit platform I/O Performance: High API name: c1.xlarge One out of the several machines is showing a high load average, since we have run the last yum upgrade a couple of weeks a go. We did not yet update the other machines, and everything looks normal on them. The strange thing is that the top command not showing any hint for the cause of the load. CPUs are - 4.8%us, 1.1%sy, 0.0%ni, 94.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st. Mem is about 1.5GB free. Any idea what could it be, or where else can we check? iostat command on the proper machine: avg-cpu: %user %nice %system %iowait %steal %idle 8.97 0.03 4.46 0.19 0.14 86.23 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn xvdap1 1.60 0.69 55.38 587620 47254184 xvdfp2 2.64 1.10 61.04 934786 52091056 xvdfp4 0.86 0.19 41.72 163866 35601920 xvdfp1 4.37 36.59 73.89 31220810 63051504 xvdfp3 8.03 7.08 94.63 6045402 80749184 iostat command on problematic machine: avg-cpu: %user %nice %system %iowait %steal %idle 9.29 0.04 5.55 0.26 0.11 84.74 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn xvdap1 2.13 3.34 68.85 246244 5077888 xvdfp1 7.60 74.31 104.88 5480362 7734840 xvdfp3 13.22 73.67 125.00 5433386 9218600 xvdfp4 1.11 0.76 65.08 55762 4799248 xvdfp2 4.16 3.31 99.17 243818 7313264 Many thanks for the help.

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  • Store profile image of all users into single directory or per subdirectory id?

    - by Luccas
    I'm using amazon s3 as storage for users profile pic. I see that many websites generates large random filenames and put them into the same root directory like: http://xxx.us-east-1.amazonaws.com/aHR0cHM6Ly9mYmNkbi1wcm9maWxlLWEuYWthbWFpaGQubmV0L2hwcm9maWxlLWFrLWFzaDIvMjczMzkxXzEwMDAwMDMxMjAxMzg5OV81NTk3MjM4Mzdfbi5qcGc.jpg And my question is: What are the pros and cons of that approach? If I palce them into different directories, what problems I will have in future? http://xxx.us-east-1.amazonaws.com/users/id/username.jpg or http://xxx.us-east-1.amazonaws.com/users/id/random_number.jpg Thanks!

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  • Address already in use - Amazon AWS

    - by Peter
    I've run into a really weird issue. I was debugging a server 500 error script on our EC2 instance and found that we didn't have ioncube loaders installed. So I went to go install them and I created a new file at /etc/php.d/zend.ini and initially I inserted the value of extension=/usr/local/ioncube/ioncube_loader_lin_5.3.so and restarted httpd at which point it told me: The ionCube Loader is a Zend-Engine extension and not a module Please specify the Loader using 'zend_extension' in php.ini PHP Fatal error: Unable to start ionCube Loader module in Unknown on line 0 So I changed the contents of zend.ini to zend_extension=/usr/...etc. Now when I attempt to restart httpd I get this error: Starting httpd: (98)Address already in use: make_sock: could not bind to address [::]:80 (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs I can't even run /etc/init.d/httpd stop without it erroring. I've since removed zend.ini to see if that's what caused it and it doesn't seem to be. Any ideas?

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  • Client unable to access OWA website after temporarily changing SSL certificate on the server

    - by Lorenz Meyer
    I have the following issue: One client computer (Windows XP) cannot access the OWA website. All other client computers can (Except another one in the same remote office). How this happened: I temporarily changed the SSL certificate on the Exchange Server yesterday. After a few minutes, I reverted back, an now the same certificate that was installed for years is back again. During these few minutes, they were in OWA on this computer and got a certificate error. What exactly happens: Internet Explorer displays the error Internet Explorer cannot display the webpage, Firefox displays The connection was reset and Crome shows This webpage is not available. The connection to ... was interrupted. What I already did to try to get this working: Restart the client computer Restart the exchange server Deleted Internet Explorer browsing history In IE, Internet Options, tab Content, under Certificates deletes SSL cache Restored Internet Explorer to the default parameters I looked into certmgr.msc, but did not find a certificate related to the issue What could I do else to narrow down the origin of this problem (or better: resolve it) ? Can you give any advice ?

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  • Windows server administration over web browser

    - by Andras Sebestyen
    I wonder if there is a software which can control Windows server over a browser. I know it sounds is strange however I haven't seen any and as you can do scripting with *nix system I think it could be a good one. Functions that I am after: User management Printer install msi assign I know there are many programmes including a win server but I would like to do it only one surface. Has anyone come a cross such a thing like this?

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  • What differences are there between an official Ubuntu AMI image and a base install from an ISO?

    - by David Winter
    When creating a new instance on AWS using an official Ubuntu 12.04 server AMI, what differences are there compared to if I was to do a standard server install on a computer of my own? For example, the default user is 'ubuntu'. An SSH public key is added to that users authorized_keys file. Sudo is passwordless for that user. PasswordAuthentication is disabled for SSH. etc etc. Configurations have been changed from their defaults, and I'd like to know if there is a list, or somewhere I could find out the modifications made.

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  • Cms rating system for beers

    - by Syska
    Hi, We are a small group of people drinking a special brewed beer every week, but we need a rating system for it. Until now we have been using a simple spread sheet, but that's not user friendly and its not online, which would be a great feature. So is there any of such system available to download ? Any further questions, don't hesitate to ask.

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  • Recommended method for routing www to zone apex (naked domain) using AWS Route 53

    - by Dan Christian
    In my AWS Route 53 control panel I simply have 2 A records currently set up for the 'www' and the 'non www' names. Both point to the Elastic IP address associated with my EC2 Instance. This works well and my website is available at both variations but I really want all 'www' to route to the 'non www'. What is the reccomened method, using AWS Route 53, for routing all traffic that comes to... www.example.com to example.com

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  • Encrypt EC2 API call

    - by Frank
    I have to host an AMI in the Amazon Marketplace. i need to get the type of instance, whenever some user launches the AMI., like if its small medium or large. based on that i need to make some changes in the AMI when its created. I can do this with Amazon API call, to get the instance type, but the problem is that the instances created with the AMI will be started by other users, and i cannot use my AWS Credentials in the Amazon API. Is there any way that i can create an anonymous readonly user to make only specific type of EC2 API Calls? Or can i encrypt my EC2 API credentials, so no one can use it?

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  • Web Hosting: Any web host that supports files more than 50,000 in number?

    - by Devner
    Hi all, For my PHP & mySQL based application, I am trying to buy website hosting from a host who does not have a limit on the number of files I carry in my hosting account. Almost all the websites have a common limit of 50,000 files (some websites call it 50,000 nodes). The rest(to the extent of my search) are not even close. I have gone through the various websites, Googled lot of information, have spoken with the customer service of the hosting companies and they said that they have a limit of 50,000 files and that's why they call it the LIMIT. Now I have my application, which is a kind of social networking website, where people can upload various files of varying file size. So say if 50,000 users were to join the website and upload 1 file each, the limit of 50,000 will be reached very easily and my 50,001 customer will start facing file upload problems (& so will my account). So I would like to know if there's any website hosting services that do NOT levy such restrictions. In summary, I need the following options: No maximum file limit (more than 50,000 files in account). No maximum file upload limit in server setting (10MB, 12MB, 15MB, 20MB, etc.). Ability to upload files of various types (zip, flv, jg, png, etc.). Ability to stream Audio and Video (live audio & video not necessary). Access to .htaccess Access to php.ini, my.cnf or my.ini (this would be a plus) Supports SSL. Provides dedicated hosting(& IP) as well. Monthly payments without contracts are a plus. If you know of any such website hosting services, please post a reply ( a link to the same will be appreciated ). Thank you.

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  • How do you get AWS VPC EC2 instances to be able to see the AWS APIs?

    - by Peter Mounce
    We're spinning up infrastructure inside of an AWS VPC via CloudFormation. We're using auto-scaling groups to bring up VPC-EC2 instances (so, we don't bring up instances directly; ASGs manage that). Inside of a PVC, EC2 instances only have a private IP; they cannot see the outside world without further work. When these instances spin up, we have some bootstrap tasks that require talking to the various AWS APIs. We also have some ongoing tasks that require AWS API traffic. How are you tackling this apparent chicken-egg problem? We've read about: NAT instances - but don't like this so much because it's another layer to our stack. assigning elastic-IPs to each VPC instance that needs to talk - but a) they all do, and b) since we're using ASGs, we don't know which instances to assign EIPs to at provision-time, and c) we'd need to set up something to monitor those ASGs and assign EIPs when instances are terminated and replaced spinning up an instance (actually, a load-balanced pair, probably spanning AZs) to act as an AWS-API proxy for all API traffic I guess I'm wondering whether there's some kind of back-door we can open that allows our VPC EC2 instances access to the AWS API endpoints, but nothing else, for cheap-complexity setup, that doesn't add another network-hop layer to our infrastructure for serving requests.

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  • Activesync/OWA Desktop Client

    - by prestomation
    At my company we have Exchange 2k3 with OWA being public, serving up Activesync and webmail. There is no pop3 or imap support from our admins. Outlook 2k3's RPC over HTTP is also disabled Is there a desktop client that can connect to Activesync or OWA? If my ipod touch can connect to activesync, why can't my pc? I'd preferably like a linux daemon that could simply forward emails to my gmail address, but I guess I'll take what I can get. Thanks EDIT: In case it was not clear, our Exchange server is hidden completely behind a firewall, and a second exchange server has only activesync and https ports opened to the world.

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  • How to integrate monit into web app deployment process

    - by shabunc
    I have: Tomcat with webapp deployed via mvn tomcat:redeploy. Monit, pinging the host and restarting server if ping failed. The thing is there in a moment during the redeployment when ping will fail - and this is normal, actually. So, the question is - what is the best way to teach monit to consider the fact of redeployment and not to confuse it with "real" black outs. This is of course an issue of balance between elegance, ease of implementation and scalability. The most straightforward solution I can think of - is just to shutdown monit before deployment and start it up after once again. But this if far from elegance I guess.

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