Amazon Web Services (AWS) delivers a set of services that together form a reliable, scalable, and inexpensive computing platform "in the cloud". If you have a question about a specific web service, consider asking on its tag, e.g., amazon-ec2.

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Use IAM to Allow User to Edit AWS / EC2 Security Groups?

I am trying to grant an IAM group the ability to edit our EC2 Security Groups, but I have been unable to get this working without granting access to everything in EC2. I have tried several versions ...
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1answer
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AWS EC2 migration to new instance type with SSD Drives

I have MySQL running on an m1.xlarge instance with a 100GB EBS volume holding the data files. I would like to migrate to a m3.2xlarge instance and place the data files on the new 2 x 80GB SSD drives. ...
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1answer
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At what point is EBS usage the bottleneck?

I've got a site hosted on Amazon using a EC2 instance backed by an EBS volume. On the weekends, traffic spikes and I make the instance larger which helps quite a bit -- I'm no longer seeing CPU usage ...
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2answers
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How can I upgrade to Java 1.8 on an Amazon Linux Server?

I tried sudo yum update but it just keeps java "1.7.0_75". I need 1.8 for it to work with another application but can't figure out how to upgrade it. Do I need to manually install it somehow? There's ...
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2answers
763 views

Access Amazon S3 Static Website Through IPv6

I host a static website on Amazon S3 with DNS hosted on Amazon Route 53. I'd like my site to be accessible via IPv4 and IPv6 (because it's about time). When I use the Route 53 AWS Management Console ...
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1answer
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How to add directives to php.ini on AWS Elastic Beanstalk?

I'd like to add these PHP settings to my Elastic Beanstalk environment: upload_max_filesize = 64M post_max_size = 64M These options cannot be set with option_settings in .ebextensions: Namespace ...
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2answers
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First attempt to migrate EC2 MySQL to Amazon RDS no going well - SUPER privileges

I've been trying to move an existing db from MySQL running on EC2 to a new Amazon RDS instance (an experiment to see if we can move across). So far, it's not going well. I'm stuck at the initial ...
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Why do AWS spot-instance prices spike above the “on demand” pricing?

Amazon Pricing on Spot Instance Inconsistencies This is something which will be best explained through screenshots of a historical chart of instance pricings. If you look at a lot of the instance ...
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587 views

How do Amazon Machine Images work?

I've seen many tutorials and such about creating AMI's, but I've never really understood the full concept of an AMI. Is a link to the instance, or is it stored and never changed. Also, does an image ...
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Install SSL on Amazon Elastic Load Balancer with GoDaddy Wildcard Certificate

I'm a bit stuck installing an SSL Cert on an AWS Elastic Load Balancer. I have a wildcard certificate from GoDaddy and need to point it at the ELB. I have run the command (I ran it on one of the ...
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Is It Possible to Copy an AWS Security Group?

We have some security groups that have quite a few rules in them. Rather than having to recreate the same rules for a number of security groups just to accommodate minor differences, is it possible to ...
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412 views

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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EC2: multiple ssh keys for an instance?

Is it possible to create more than one private key to SSH into an EC2 instance? What's the general best practice for this? We have multiple users who need to SSH into the servers and distributing one ...
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4answers
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How can I automatically cycle a new image in an AWS Auto Scaling Group?

I have a web application setup with a load balancer and auto scaling group to manage scaling. The source code is in a git repository so I don't have to update the images when the code changes, but ...
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4answers
602 views

Moving all internal servers to the cloud

Background One of my clients is an IT-dependent workflow-driven law firm with about 50 seats. They have been audited by one of their clients (an FSA regulated mortgage lender) and told that their ...
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2answers
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EC2 Update my existing AMI

I'm using Elastic Load Balancing to load balance my Auto Scaling Group, for that I have a private AMI that hold my application server (Tomcat) and my web app deployed to it as war ... Now everything ...
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2answers
346 views

How to list all VPC dependencies in AWS CLI?

I want to delete VPC through CLI. But get an error: A client error (DependencyViolation) occurred when calling the DeleteVpc operation: The vpc 'vpc-xxx' has dependencies and cannot be deleted. ...
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401 views

Managing IAM security credentials for multiple docker containers

Within plain EC2 environment, managing access to other AWS resources is fairly straightforward with IAM roles and credentials (automatically fetched from instance metadata). Even easier with ...
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2answers
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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 ...
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5answers
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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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4answers
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Nginx set_real_ip_from AWS ELB load balancer address

I have a set of Nginx servers behind an Amazon ELB load balancer. I am using set_real_ip (from the HttpRealIpModule) so that I can access the originating client IP address on these servers (for ...
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1answer
459 views

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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If I shut down Amazon EC2 instance then start it again, will everything be ok?

I have a web site that runs on an Amazon EC2 Linux-based instance, and is mapped to a regular domain name (x.com). This site talks to a database on a second EC2 instance. I need to shut down this ...
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1answer
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Can I SSH into my Amazon EC2 server instance if I don't have .pem file from when instance was created?

I am working with some Amazon EC2 servers that are up and running, and I need to SSH into the servers. I don't have any keys that were generated when the servers were first set up (someone else did it ...
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2answers
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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 ...
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1answer
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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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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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3answers
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Can you require MFA for AWS IAM accounts?

Is it possible to require Multi-factor Authentication (MFA) be enabled for specific/all IAM accounts in Amazon Web Services? There are options for password requirements and it's clear how one can ...
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1answer
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Why does top report a different cpu usage than CloudWatch?

top shows an average CPU usage during peak times of about 20% while CloudWatch monitoring shows an average CPU usage of 40%. What causes this discrepancy?
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578 views

Storing AWS credentials securely on a personal machine

How can I securely store AWS credentials on personal machines? In detail: Everybody in our team requires AWS security credentials for doing administrative tasks (credentials are separated by role). ...
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1answer
8k views

Setting Access-Control-Allow-Origin on Cloudfront

I am having problems serving static assets to Firefox using AWS Cloudfront. Chrome works perfect, but Firefox is returning a CORS error. If I execute curl , I get: HTTP/1.1 200 OK Content-Type: ...
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2answers
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How do I set a VPC in AWS to 'default VPC' = true?

I have one VPC set up in AWS, but Default VPC is set to 'false'. How can i change it to true, and make it the default VPC?
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Multiple EC2 security groups - permissive or restrictive?

What happens when I assign multiple security groups to an instance? Is it permissive in the sense that the traffic is allowed in if any one of the security groups allows it. OR is it restrictive in ...
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4answers
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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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2answers
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How do I attach an Elastic IP to an Elastic Beanstalk app?

I can give a single instance an Elastic IP. No problem. But I have an Elastic Beanstalk app. It can create and remove instances as needed. It has a load balancer. How can I get these features ...
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1answer
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XFS: no space left on device, (but I have 850GB available!)

I'm using a combination of mdadm, lvm2, and XFS on Amazon EC2. So far, I've had success running a RAID 5 volume built from a number of EBS volumes. The EBS volumes are attached and used with mdadm to ...
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2answers
705 views

How to change assigned letter for Ephemeral drives automatically?

I have an AWS Windows box (Windows 2008 R2) with the following disks: C:\ 60 Gb (EBS) D:\ 200 Gb (EBS) Y:\ 40 Gb (Ephemeral SSD) Z:\ 40 Gb (Ephemeral SSD) Every time it boots I change ephemeral ...
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2answers
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AWS VPC - why have a private subnet at all?

In Amazon VPC, the VPC creation wizard allows one to create a single "public subnet" or have the wizard create a "public subnet" and a "private subnet". Initially, the public and private subnet ...
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2answers
3k views

RDS Replication across regions

We are using Amazon AWS for our web services but given the recent instabilities in their infrastructure, we are trying to figure out how to run our application across multiple regions for additional ...
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1answer
872 views

Has anyone achieved Level 1 PCI compliance on AWS?

All the FAQs, documents and statements published by AWS aside, did any Level 1 merchant actually achieve PCI compliance on AWS yet? We're evaluating moving some of our services to EC2/VPC, but our ...
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1answer
673 views

Update the container of a service in Amazon ECS

What kind of approach is recommended for updating the container of a service which is running in Amazon ECS? The AWS documentation says: "If you have updated the Docker image of your application, you ...
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4answers
1k views

Easy way to convert custom 32-bit AMI into 64-bit one?

I have customised (EBS-backed) AMI for running a demo version of an application of ours. (The AMI contains Ubuntu 11.04 with a Tomcat & MySQL setup for the app itself, and Jenkins for easy ...
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3answers
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Why doesn't the aws cloud formation install the packages that I specify?

I'm very new to the AWS services. I'm trying to use the AWS cloud formation and I created a template. The template is error free and I am able to create machines using that. But I have added some ...
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2answers
534 views

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

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 ...
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3answers
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The site is using outdated security settings that may prevent future versions of Chrome from being able to safely access it

We're using an AWS ELB to do SSL termination and are having an issue where Chrome is displaying "https" in red with a strikethrough. It says "The site is using outdated security settings that may ...
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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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3answers
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Can't run AWS CLI from CRON (credentials)

Trying to run a simple AWS CLI backup script. It loops through lines in an include file, backs those paths up to S3, and dumps output to a log file. When I run this command directly, it runs without ...
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3answers
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Which aws zone to choose if website traffic will be from india only

I am going to make my website live on AWS servers and 100% of intended website audience will be from India only. As amazon offers you to get services from various zones, I was wondering is there any ...
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1answer
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Search ec2 instance by its name from aws command line tool

I have an instance named dev-server-03. Now how can I search all dev-server-* instances from command line? I am using aws cli tool.
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2answers
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What algorithm does Amazon ELB use to balance load?

I found this in the official ELB documentation By default, a load balancer routes each request independently to the application instance with the smallest load. but an article on Newvem says ...