Amazon Elastic Compute Cloud (EC2) provides self-service, on-demand, pay-for-what-you-use computing infrastructure resources.

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Which permissions/policies for IAM role to be used with CloudWatch monitoring script

With CloudWatch monitoring script (mon-put-instance-data.pl) it's possible to specify a IAM role name to provide AWS credentials (--aws-iam-role=VALUE). I'm creating a IAM role for this purpose (to ...
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How can I create a swap partition on Amazon EC2 with ephemeral storage?

This is the output of df -k: Filesystem 1K-blocks Used Available Use% Mounted on /dev/xvda1 10317860 7059008 2734732 73% / none 847584 0 ...
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Why OOM-killer invoked even when huge amount of RAM is free

On EC2 ebs-backed xlarge ubuntu instance, oom-killer is getting invoked. From /var/log/syslog output below, it appears that ZONE_NORMAL is running out of memory: Node 0 Normal free:11344kB min:...
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Setting Up ELB with SSL - What is Backend Authentication?

I started setting up Amazon's Elastic Load Balancing Service for my server pool and I need to setup HTTPS/SSL. I have all my SSL Certificates setup, but then I come to the step for backend ...
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1answer
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JIRA installation on Amazon EC2

Trying to install JIRA on an EC2 micro instance, that has only 600MB. The moment I start tomcat, JIRA uses up almost all existing memory, it is very very slow and it doesn't even start completely. ...
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Is it dangerous to reveal my EC2 instance ID?

In Stack Overflow answers (like this), I often take screenshots which include Instance ID's belonging to me. Is it a bad idea to reveal these?
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How can I point my domain name to my Amazon EC2 Elastic IP address?

I have an Elastic IP address that points to an instance of my EC2. How can I configure my domain name (hosted at GoDaddy) to point there?
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Block IP on EC2. Firewall or other options?

My EC2 (Fedora AMI) based service is being heavily hit by a rogue misconfigured client. What options do I have to block the IP of this rogue client?
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Restoring an Amazon EBS RAID0 array from snapshots taken with ec2-consistent-snapshot

I've configured a new MySQL server on Amazon EC2 and decided to store my data on a EBS RAID0 Array. So far so good, and I've tested taking snapshots of those devices with ec2-consistent-snapshot, ...
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What's the best practice for taking MySQL dump, encrypting it and then pushing to s3?

This current project requires that the DB be dumped, encrypted and pushed to s3. I'm wondering what might be some "best practices" for such a task. As of now I'm using a pretty straight ahead method ...
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Correctly setting the hostname - Fedora 20 on Amazon EC2

Context I have a Fedora 20 cloud image running on Amazon EC2 (henceforth called the "instance"). And I have some uncertainty about persistently setting its hostname. Goal In this case, let's say I ...
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Prevent Amazon EC2 Time zone from reverting back on yum update

I use an Amazon EC2 server instance that runs a distro called Amazon Linux AMI. (I've read that it is based on CentOS/Red Hat). My specific version is the 2012.09 release. Anyway, I was able to ...
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Windows desktop (XP, Vista or Win7) EC2 AMI for QA testing

I need to perform QA testing for Windows based applications on a Windows desktop client and I would like to know if EC2 supports Windows images that are NOT server based (e.g. Server 2003). I have ...
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4answers
897 views

External load balancer solutions between EC2 and Rackspace

I have a website primarily hosted on EC2 with the backends (MySql) replicated async to a Rackspace store. I am also planning to have a suite of web server, cache & db on standby at Rackspace in ...
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MMS gets hostname from uname and can't connect to it

I'm trying to get 10gen's MongoDB Monitoring Service monitoring my 3-node replica set. The replica set running in an AWS VPC. Each node runs on a different [virtual] machine. Assume their IPs are 192....
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EC2 - Shared Storage - S3FS or EBS?

Building my web service onto EC2 right now and have a single instance behind a load balancer. I will of course cater for multiple instances. My initial idea was to run all the instances a dumb slaves,...
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High load due to I/O wait in Ubuntu 12.04 on EC2 instance

I am using Ubuntu server 12.04 , having trouble finding cause of load, I have seen change in response time of server from past week after reading Linux Troubleshooting, Part I: High Load It seems ...
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xen:balloon: reserve_additional_memory: add_memory() failed: -17

We're running Ubuntu 14.04 on an EC2 virtual machine. I've been seeing a lot of these errors in our kernel log: [ 704.032085] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 736....
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How do you create large, growable, shared filesystems on Linux at AWS?

What are acceptable/reasonable/best ways to provide large, growable, shared storage at AWS, exposed as a single filesystem? We're currently making 1TB EBS volumes ~biweekly and NFS exporting with ...
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NFS (with Kerberos) mount failing due to “Server not found in Kerberos database” error

When running: sudo mount -t nfs4 -o sec=krb5 sol.domain.com:/ /mnt I get this error on the client: mount.nfs4: access denied by server while mounting sol.domain.com:/ And on the server syslogs I ...
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Nginx Solution for AWS Amazon ELB Health Checks - return 200 without IF

I have the following code that is working on Nginx to keep the AWS ELB healthcheck happy. map $http_user_agent $ignore { default 0; "ELB-HealthChecker/1.0" 1; } server { location / { if ($...
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Amazon EC2 Backup Strategy With Restrictions (little to no snapshots can be taken?)

Similar questions have been asked but I need to know what would be recommended under the circumstances, to know if I'm missing something in my understanding of using EC2. A small startup is running ...
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Is RAID 1 overkill on Amazon EBS drives in terms of reliability?

My thinking behind this is that RAID 1 creates two or more copies of the data on multiple EBS drives. Yet, aren't Amazon EBS disks virtually fail-safe because they live on multiple physical drives? So ...
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How to load balance sftp instances on AWS

I like to know is it possible to load balance sftp servers in AWS. I have 2 servers, and each of my servers are using s3fs-fuse to mount the same S3 bucket onto a mount point. Both of my ec2 ...
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What is the ip range of EC2

I'd like to setup a rule to block ssh request from EC2 since I've been seeing a large amount of ssh based attack from there and was wondering if anyone knew what their IP ranges are. EDIT: Thank you ...
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Broke my /etc/sudoers file on amazon EC2

I edited my Linux Amazon EC2 instance using vim /etc/sudoers and tried adding another account to the list. I realize now that this was a terrible mistake. I can no longer sudo from any account (which ...
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1answer
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Amazon Ec2 Elastic IP - Outbound IP?

I am trying to make a kind of proxy using elastic IPs on my Amazon EC2 instance. My question is, say I associate an elastic IP to my Amazon instance, and then I make an outbound connection from my EC2 ...
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xvda1 is 100% full, What is it? how to fix?

I'm running a Linux instance on EC2 (I have MongoDB and node.js installed) and I'm getting this error: Cannot write: No space left on device I think I've tracked it down to this file, here is the ...
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Why are Amazon EC2 Elastic IPs encouraged to be used with a CNAME rather than an “A” record?

I am setting up a server on EC2 that will be used by people that will be freaked out when they see ec2-111-111-111-111.compute-1.amazonaws.com in the URL bar. I know this would be solved by using an ...
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IP changed when EC2 instance stopped and started

I have a strange issue here regarding and EC2 instance. I had just stopped and started an EC2 instance for windows after expanding the boot drive, not after I had started the instance, the IP it was ...
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proxy:error AH00898: Error during SSL Handshake with remote server

I have a server that acts as a front-end for a cPanel mailserver in a network. The apache proxy on the front-end server ran for 152 days without fault then suddenly I now get 500/502 errors when using ...
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How do I mount an EBS root volume to a windows instance in Amazon EC2

So basically, I created a large windows server for development, and then I created a micro windows server for production. I set up everything how I wanted it on my development server, and then i ...
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How to persist iptables configuration on Amazon EC2 VPC NAT Ami? [duplicate]

I have a small script like this to configure the iptables: #!/bin/bash PRE_STR="iptables -t nat -A PREROUTING -p tcp -j DNAT" FOR_STR="iptables -A FORWARD -p tcp -j ACCEPT" ########################...
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Is mounting S3 buckets directly into EC2 instances safe?

as the title of my question says, I would like to know whether this is a good practice or not, I know I can mount it in an EC2 instance but I was wondering if, as I will be adding more instances to ...
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Convert file system format on AWS EC2 ephemeral storage disk from ext3 to ext4

I have an instance-store EC2 instance with Ubuntu 11.04 i386. At present my disk partition looks like this: Filesystem Size Used Avail Use% Mounted on /dev/xvda1 9.9G 529M 8....
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My server is working fine, but I can't ping it

I noticed earlier, one (of many) of our EC2 instances doesn't respond to ping requests. Everything else runs fine, SSH, HTTP, FTP, Database all working perfectly, but ping fails. This instance is ...
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Why can't I ssh or ping my brand new Amazon EC2 instance?

I just created a free EC2 instance with all the defaults. It says it's running in the AWS Management Console. On the "Instance Actions" menu, I click "Connect". I copy the DNS name provided (looks ...
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Production deployment to EC2 with minimal downtime

I have a simple web application deployed on a large instance with EC2. I now want to deploy the latest code to this server but I want to do this in a way which minimizes downtime and is a smooth as ...
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Does anyone have any experience when it comes to speed of Amazon RDS vs MySQL on a Small server?

EC2 Small vs Amazon RDS - which is faster for MySQL? (I have one database, well-indexed and tuned. About 10,000 rows on each table.) How's the performance like?
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How do I interact with the console during boot time on Amazon EC2?

I have an instance which is stuck at this boot prompt (looking at the instance log from the management console): The disk drive for /mydisk is not ready yet or not present Continue to wait; or Press ...
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How can I login amazon ec2 with root directly in putty or winscp?

0 down vote favorite 1) How can I login amazon ec2 with root directly in putty?? each time i need to su - root first and change to root...is there any other ways?? 2) How can I login amazon ec2 ...
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Accessing storage on an EC2 instance?

I am using a large EC2 instance but just realized that I don't have the space promised. I only get 8 gigs when it says I should have 850 GB. From what I understand two extra 420 gb drives should be ...
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Amazon EC2 VPC: NAT instance download speed performance drop

I have a set of servers inside Amazon EC2 in VPC. Inside this VPC I have a private subnet and a public subnet. In the public subnet I have set up a NAT machine on a t2.micro instance that basically ...
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AWS: Multi-region setup using single RDS instance

I'm trying to scale our web application (PHP, MySQL, memcache) in a multi-region scheme. Currently we are using a setup with two EC2 instances behind an ELB and an RDS instance, all of them in US-EAST ...
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How to automate an Amazon EC2 instance startup, execution of some commands and shutdown?

I need to download 100 GB of files (it’s in about 150 files) within a 7 day period before they expire. The download is rate-limited by the host so it takes MUCH longer than the theoretical transfer ...
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EC2 linux any and all upstart jobs returning “unrecognised service”

Having a nightmare migrating some upstart jobs from Ubuntu to EC2 Linux (ElasticBeanstalk) I am unable to get even the most basic task to work. I am using the script below which works perfectly on ...
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What constitutes “idle” CPU during T2 CPU credit calculation?

The documentation for EC2 T2 "burstable" types say: The baseline performance and ability to burst are governed by CPU credits. Each T2 instance continuously receives CPU credits at a set rate, ...
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Windows Password won't decrypt on AWS EC2 even with the correct private key

I created a new Windows instance on AWS EC2, using a keypair I created by uploading my public key from my local machine. The instance launched fine, but it won't decrypt the password. It reports: ...
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How to automatically update nginx upstream server list when aws ec2 hostname changes or increases?

I want to setup autoscaling in AWS. I don't want to use Elastic Load Balancer. Autoscalling in Amazon creates EC2 instances seamlessly during demand spikes to maintain performance, and decreases ...
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AMI with or without reboot on AWS EC2

When creating AMI's from an EC2 instance I always check "no reboot", I've been wondering, what are the pros/cons of creating images with/without a reboot? Does keeping the server live affect the ...