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• Web server (IIS) and database mirroring (Postgresql)

  - by Timka

  Recently our web-server crashed and we had to recover everything from a backup which took the whole day(totally unacceptable in our business). So my question is, how can I create a complete mirror of the server that I can use (switch dns to) in case the same disaster happens in the future? Our main server is on Amazon with Windows 2008/IIS + Postgresql 9.1. I was thinking on creating the same server on a different location as a complete mirror with the database replication. But I'm not sure how to implement IIS instance mirroring over the internet... So my question is, how can I create a complete mirror of the server that I can use (switch dns to) in case the same disaster happens in the future?

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• AWS:EC2:: Why my web folder is called "html"??

  - by heathub

  P.S Q stands for Question. My environment is: Amazon linux 64 bit (Q1. i dont if its ubuntu or red-hat, is there any way to check?) And I need to run php and mysql, thus I installed httpd (Q2. is httpd == apache??), but on my default page, it says: please upload files to /var/www/html folder. Q3.This is the first time I set aws ec2 server myself, my previous experience is hosting with hosting company. Normally in hosting company, my web directory is called "www" or "public_html" or "htdocs".Why is my folder name is "/var/www/html"? Am I installed wrong apache?

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• Calculating Cloud Service Costs [closed]

  - by capdragon

  Possible Duplicate: Can you help me with my capacity planning? I would like to scale a web application to the Cloud and wanted to know if anyone had any experience calculating costs and could tell me how I would go about that. I have NO experience with cloud services at all. Currently my production environment consists of two web servers and one database server. If the application continues on a linear growth path, eventually, I want to scale to the cloud to avoid any more long term commitments to extra hardware. I want to be able to create a similar environment I have now as a baseline. Have this as my fixed cost that I will always have. I also want to calculate my variable costs that will increase with more users or bandwidth. I don't have a preferred cloud vendor. Amazon, Rackspace, Terremark or any other is fine as long as understand how to calculate my fixed and variable costs.

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• What can I do to give some more love and disk space to my database on Ubuntu?

  - by Yaron Naveh

  I'm new to linux. I've deployed a db to ubuntu server on amazon and found out I'm low on disk space. did df (see below) - and found out that I'm 89% capacity on one file system, but less on others. What does this mean? Do I have a few partitions and can now utilize others besides /dev/xvda1? Also /dev/xvdb seems large, is it safe to put the db in it and only use it? If so do I need to mount it or do something special? $> df -lah Filesystem Size Used Avail Use% Mounted on /dev/xvda1 8.0G 6.7G 914M 89% / proc 0 0 0 - /proc sysfs 0 0 0 - /sys none 0 0 0 - /sys/fs/fuse/connections none 0 0 0 - /sys/kernel/debug none 0 0 0 - /sys/kernel/security udev 3.7G 8.0K 3.7G 1% /dev devpts 0 0 0 - /dev/pts tmpfs 1.5G 164K 1.5G 1% /run none 5.0M 0 5.0M 0% /run/lock none 3.7G 0 3.7G 0% /run/shm /dev/xvdb 414G 199M 393G 1% /mnt

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• Running make for Nginx throws a “multiple target patterns” error

  - by Justin Meltzer

  When I run make inside my installed nginx directory I get the output: make -f objs/Makefile make[1]: Entering directory `/home/ec2-user/nginx/nginx-1.2.4' objs/Makefile:110: *** multiple target patterns. Stop. make[1]: Leaving directory `/home/ec2-user/nginx/nginx-1.2.4' make: * [build] Error 2 I am on an Amazon Linux AMI. The steps I took from the beginning was wget /path/to/nginx/tarball tar xvf nginx-1.2.4.tar.gz cd nginx-1.2.4 ./configure --prefix=/nginx --a-bunch-of-other-options Then I ran make. Also I installed make by running sudo yum install make Please let me know if there's any other information I should be providing.

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• Kindle 2 and PDFs in landscape

  - by doronkatz

  Hi guys, I am looking at getting a Kindle 2, read a lot about the PDF support (or lack off) and wanted to ask someone who has a kindle, a question. If you read a pdf in landscape mode, does it shrink the text to have it all in the one screen, or does it increase font size and split it into two or more pages. I have another reader, the iRiver Story and it does that, splits it into multiple pages thus making it readable. I know you can't zoom or anything like that in portrait view (i assume) I know you will say stick with iRiver, but the make of the kindle is a lot better (metallic back) and its useful to have a hybrid amazon book/pdf reader in one.

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• Mail Server using Postfix

  - by unknown (google)

  I have currently set up my web application on Amazon EC2 server. As a well known fact sending email from EC2 has a problem. As a cheap and long lasting solution instead of using "authsmtp" is it possible to rent a server and use it as a Mail Server? I am currently looking for cheap hosting which will give me root access so that it can be configured and used as a relayhost. I am curently using Postfix as MTA. Has any one implemented this before? I am curious about its feasibility of this solution. I guess common requirements are: Dedicated IP which is not black listed Open relay( open to my Server only) Any Tips for Header configurations to keep the mails out of spam folder. This is like exactly cloning authsmtp for personal use. Any suggestions for other Mail Server software instead of Postfix?

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• Providing high availability and failover using MySQL on EC2

  - by crb

  I would like to have a highly-available MySQL system, with automatic failover, running on Amazon EC2 instances. The standard approach to solving this is problem Heartbeat + DRBD, but I've found a lot of posts suggesting DRBD doesn't work on EC2, though none saying exactly why. Obviously, a serial heartbeat or distinct network is out of the question in the virtualised environment. It would also be good to have the different servers be in different availability zones, but we're getting into a much harder problem there. What are peoples' opinion on having a high uptime solution in "the cloud"?

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• SPF problems with Google Apps

  - by mahle

  I currently have an SPF record with a hostname of @ that is: v=spf1 mx ip4:x.x.x.243/32 include:_spf.google.com include:amazonses.com ~all I also have another record of" spf2.0/pra mx ip4:x.x.x.243/32 include:_spf.google.com include:amazonses.com ~all We have had a lot of email being bounced back because of spam and now when I go to http://www.kitterman.com/spf/validate.html? and check the "Does my domain already have an SPF record? What is it? Is it valid?" it says no spf record exists. However, when I send an email using our Amazon SES script and check the headers it says it passes the SPF test. Is there something I am missing? Do I need to place that text in quotes ""? Any help would be greatly apprecaited.

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• How do I expose a webapp on :8090, even though firewall allows only :80 and :22

  - by Kaustubh P

  I am a noob in Server related stuff, so bear me. I use amazon webservices (EC2) on which I have a webapp running on jetty, which runs on port 8090. I deploy the webapp through the usual method of java -jar start.jar So then to access the app, I have to add a port in the URL, like this: someIP:8090/app But just typing someIP in the browser takes me to a page that shows It works! This is the default web page for this server. The web server software is running but no content has been added, yet. which I assume is apache. I have apache, tomcat and jetty installed. What can I do so that I dont have to specify the port? Do I have to perform port-forwarding? Thanks a lot.

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• AWS EC2 and build-essential

  - by Randy Hartmen

  Hi, I am trying to compile Node.js on Amazon EC2, but I can't even install "build essential". Where's the problem? Thanks. sudo yum install build-essential Loaded plugins: fastestmirror, security Loading mirror speeds from cached hostfile (...) No package build-essential available. Error: Nothing to do ./configure Checking for program g++ or c++ : not found Checking for program icpc : not found Checking for program c++ : not found error: could not configure a cxx compiler! could not configure a cxx compiler!

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• Email solution for new domain [on hold]

  - by user196286

  I registered my domain at NameCheap, and have it hosted now at AWS Route 53. However, I'm at a loss for how now to set up sending transactional email. I hear Amazon SES is a good solution, but that requires me to verify my e-mail. I don't have email set up (no e-mail addresses at my domain nor a email client to receive the email verification). As an added wrinkle, I have my sitename.com bucket redirecting to www.sitename.com, and I'm hosting my site on Route 53 using www.sitename.com. However, does this screw things up if I need to switch my MX records since perhaps the 'www' throws things off (would it point to mail.www.sitename.com)?

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• How to set up JBoss with S3_Ping on AWS?

  - by Jonik

  I'm looking into running clustered JBoss on Amazon Web Services (AWS). I'd like to try out S3_PING, i.e. making JBoss use an S3 bucket for dynamic node discovery etc, since no multicast is available. I found a piece of example config XML related to S3_Ping, but I'm not sure where in JBoss installation you're supposed to configure this. So, what JBoss config files would I need to tweak to get S3_PING working? Can anyone point me to a more complete example? JBoss 5.1.0 GA. (This is probably more a JGroups/JBoss question than anything else. I've already got the S3 bucket for this set up, so no problem there.)

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• Mounting both /dev/sda and /dev/sda1 - how can this be?

  - by itsadok

  I work on an Amazon EC2 instance that somebody else set up. We have an EBS volume mounted on /dev/sda, even though the root device is already on /dev/sda1, and we're also using `/dev/sda2' user@server:~$ mount /dev/sda1 on / type ext3 (rw) ... (snip) /dev/sda2 on /mnt type ext3 (rw) /dev/sda on /vol type xfs (rw,noatime) ... This doesn't seem to fit with what I know about the way /dev/ works. How is this possible, and more importantly: will this cause trouble in the future? I'm running ubuntu 9.04 jaunty.

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• Two threads in a rails initializer file seems to not run them properly

  - by Luccas

  Initially I was using one thread to listen a queue from amazon and works perfectly. aws.rb Thread.new do queue1 = AWS::SQS::Queue.new(SQSADDR['my_queue']) queue1.poll do |msg| ... but now I appended another thread to listen another queue: ... Thread.new do queue2 = AWS::SQS::Queue.new(SQSADDR['my_another_queue']) queue2.poll do |msg| ... and now it seems to not work. Only the last one receives response... I have to join the threads? I can't understand What is going on?

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• zlib/libxml2 duplicate package?

  - by Fusion

  I've been updating my amazon ec2 micro instance every month till now. when i try to "yum update" i receive this error : zlib-1.2.5-7.11.amzn1.x86_64 has installed conflicts libxml2 < ('0', '2.7.7', None): libxml2-2.7.6-4.12.amzn1.x86_64 zlib-1.2.5-7.11.amzn1.x86_64 is a duplicate with zlib-1.2.3-27.9.amzn1.x86_64 yum update output: http://pastebin.com/Dfq0yphN I've tried to update separately zlib and libxml2 zlib: same "duplicate" error. libxml2: Transaction Check Error: package libxml2-2.7.8-10.24.amzn1.x86_64 is already installed what can i do?

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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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• Nginx server_name is set to mydomain.com, so why is www.mydomain.com getting served too?

  - by Lorenz Forvang

  I have my Nginx conf set up as follows: server { listen 443 ssl; server_name mydomain.com; ... } When I load https://mydomain.com, the site loads fine. But when I load https://www.mydomain.com, the site loads as well. Why is this happening? I set up the DNS records using Amazon Route 53 as: A mydomain.com xxx.xxx.xxx.xxx (IP) CNAME www.mydomain.com mydomain.com So is a request to www.mydomain.com arriving at Nginx as a request to mydomain.com? If so, how do I differentiate requests to www.mydomain.com and mydomain.com at my server?

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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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• 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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• Providing high availability and failover using MySQL on EC2

  - by crb

  I would like to have a highly-available MySQL system, with automatic failover, running on Amazon EC2 instances. The standard approach to solving this is problem Heartbeat + DRBD, but I've found a lot of posts suggesting DRBD doesn't work on EC2, though none saying exactly why. Obviously, a serial heartbeat or distinct network is out of the question in the virtualised environment. It would also be good to have the different servers be in different availability zones, but we're getting into a much harder problem there. What are peoples' opinion on having a high uptime solution in "the cloud"? Note: This question was asked before RDS with multi-AZ was announced, which is the nice automatic answer for today's modern IT professional. :)

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• How to create a new public AMI for windows?

  - by user67081

  I am trying to make a windows 2008 AMI that is a nice clean 64bit starter pack (IIS, SQL express, ASP.NET MVC, etc...) I would like to make it a public AMI when its done. There in lies the problem. I can make an AMI from my image no problem. But I can't seen to get new instances to generate their own passwords.. The results are that I have a new instance that works great with my password. So what is the process of making my EBS backed Instances convert into an AMI that will auto-generate its password and do all the other setup steps that amazon wants to go thru when a new instance starts up? Thanks in advance.

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• Using AWS SES with Sendmail

  - by Abs

  I am trying to send mail via AWS SES uisng Sendmail. I have Sendmail version 8.14.4 installed and I followed the first section of this useful tutorial by Amazon. However, I get this: root@:/etc/mail# echo "Subject: test" | sendmail -v [email protected] [email protected]... Connecting to [127.0.0.1] via relay... [email protected]... Deferred: Connection timed out with [127.0.0.1] Can anyone help me get this working? The logs have the following: Dec 14 10:35:21 ip-10-xx-xx-181 sm-msp-queue[17910]: qBE8K1Lu016411: to=root, delay=00:21:24, xdelay=00:06:19, mailer=relay, pri=121806, relay=[127.0.0.1] [127.0.0.1], dsn=4.0.0, stat=Deferred: Connection timed out with [127.0.0.1]

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• How can I get started with BigData?

  - by ????? ????????

  I have a programming background, and I've done lots of database design and written lots of queries with Sql Server. I am really excited about looking at bigdata solutions. I know almost nothing about it. The way I want to learn is to sign up for a sandbox where I can try things out. questions Is there a sandbox where I can play around with hadoop? It does not have to be free. Would amazon EMR be the right path to go? What technologies should I be looking at to get started quickly? Is there a 'bigdata' dataset that is available to play with? Thank you so much for your guidance.

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• Tomcat access logs - are failed requests included?

  - by Maxim Eliseev

  We have a RESTful web service (Java, hosted in Tomcat on Ubuntu on Amazon EC2). From time to time it fails (not every week). When it fails, Java CPU consumption goes to 100% and it takes all available memory. It does not finish by itself. I have to restart the server. There is nothing suspicious in Tomcat access logs. I guess one of our users could submit a very "heavy" request which brought the server down. Is it possible this request is not in Tomcat logs since it never finished?

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