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

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106 views

Mail spam error while sending mails using Gmail id via Postfix hosted on Amazon EC2 server

This issue is related to using my own SMTP server to send email by any user mail id like some other mail APIs do e.g; Amazon SES, MailChimp. I am using Postfix as a mail server for my applications. I ...
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100 views

VPC EC2 Instances can PING each other, but not SSH

I've setup an SSH with multiple subnets. I have an instance in my public subnet (Subnet A) built from an AWS NAT AMI. I have another instance in my private subnet (Subnet B) built from a standard ...
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56 views

AWS RDS subnet/az requirement doesn't work with virtual UTM

Background: I want to put an AWS RDS instance into a VPC that has a virtual UTM as its internet gateway. Virtual UTM is an normal EC2 instance with 2 network connections, one internal, one external. ...
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29 views

Is it possible to use an Elastic Load Balancer on an IIS Server accepting BITS Uploads?

I have a website hosted on EC2 using IIS 8.5. I've got a virtual directory with BITS uploads enabled, and everything works over http and now https when my URL points to the instance's public EIP. The ...
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41 views

How to properly configure security group at AWS?

I'm trying to reach my server's FTP-port by its Elastic IP. I've configured the security group as follows: Inbound Type Protocol Port Range Destination All traffic All All ...
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60 views

Cannot access apache2 and tomcat running on my ec2-instance

My ec2 ubuntu instance has apache2 working on port 80 and tomcat working on 8080. I'm not able to access them from my browser, i checked the access.log for apache2 it doesn't show the request coming ...
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53 views

Out of space on EC2 instance due to docker logs

I'm still learning docker and AWS, and I've had a docker process running awhile with 50gb EBS storage, and now I'm out of disk space and as a result, docker no longer starts up when I reboot my ...
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52 views

How to sync folders between two Windows Servers in Amazon EC2

I have two servers running Windows Server 2012 in Amazon Cloud. One is hosted in EC2 (A) and another - in VPC (B). I have a folder in the same location on both servers. And I need to sync files from ...
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36 views

EC2 websites & RDS databases backup

We have some Amazon EC2 machines on which different websites are working, and their database is being pulled from RDS-MySQL, I know for machine I can have images as backup and for RDP-MySQL it has ...
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29 views

sshfs fails sporadically in ec2

I am running multiple (2-5) Jenkins build slaves in AWS EC2. The master and slaves run Ubuntu 14.04. The slaves scale up and down dynamically. They compile Java/Scala projects build using SBT. To ...
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92 views

CentOS 7 mount ebs thorugh systemd unit

CentOS 7 HVM community image is not mounting the drive if as recommended we do it via rc.local(since doing it via /etc/fstab entry may halt the machine and make it not reachable if any issue occurs in ...
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52 views

attached volume of a FreeBSD amazon ec2 instance does not show up

I have followed the steps in the documentation, created a new EBS volume and attached it to the instance (I only have one). I rebooted and tried shutdown/start, but the device does not show up inside ...
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17 views

With PROXY support enabled in ELB, are occasional non-PROXY connections to the EC2 instance still possible?

We have PROXY protocol support enabled on our ELB but we seem to be occasionally getting non-PROXY TCP connections to the EC2 instance behind the ELB. The instance's Security Group only allows ...
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90 views

what is cause of high system CPU usage(%sy)

I am trying to find cause of high load , I am having high load every 30 minutes in Ubuntu 12.04 server system , I have Zpanel Installed on it and It have some web applications running Here in Image ...
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131 views

AWS SSH Session getting closed by Server intermittently

I have connected to the AWS EC2 Ubuntu instance using putty on Windows 7(ppk authentication). Most of the time I'm getting this message on putty: Network error: Software caused connection abort. But ...
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300 views

Apache Server Stops Serving Requests Temporarily with Apache 2.4.12 on Amazon Linux with PHP 5.4.40 FPM/Worker

We have an apache server stopping serving requests constantly due to the following error: (70007)The timeout specified has expired: [client xxx.xxx.xxx.xxx:33740] AH01075: Error dispatching request ...
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27 views

Amazon linux EC2 from CloudFormation - stop service

I'm running a my service on a Amazon EC2 create from a CloudFormation script. I put service file in /etc/rc.d/init.d/myService. (includeing "start" and "stop" functions). I've also linked it like ...
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15 views

Read data from external bucket on Amazon EMR

I need to read data from a bucket that I don't own, and I get the IAM account key and secrete access key to the bucket. What is the best way I can access the data? How can I add another IAM with ...
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77 views

Amavis won't start without error

My e-mail server is almost fully set up. I use Postfix with Dovecot for sending mails. Now I try to configure Amavis for anti-spam and anti-virus. When starting amavis and checking the status, I ...
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98 views

AWS autoscaling and ec2 t2

I use t2.medium as a front servers at my architecture. Usually AWS autoscaling use "CPU Utilization", but for t2 it's a bit tricky. When "CPU Credit Balance" is low, t2.medium "CPU Utilization" can ...
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55 views

Can't connect to VPN through ec2

I have created a VPC (private and public subnet) and VPN connection with the AWS wizard. Unfortunately, I can't connect to the host in the VPN outside AWS. When I try, I get a timeout. I have ...
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55 views

AWS EC2 replacement instance

I've inherited our AWS management duties for the time being and I've received a notice from AWS about some of our instances needing regular maintenance. The EC2 instances are pretty primary, a proxy ...
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48 views

AWS EC2 Instance with Windows 2008 R2 Datacenter Not Using All of Memory

I have an m1.large EC2 instance running with Amazon Web Services. The OS is Windows 2008 R2 Datacenter. It should have 7.5 GB of memory, and the desktop background indeed says: Total Memory : 7.5 ...
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21 views

Apache bad performance

I have Apache 2.4 on CentOs with mod_php (PHP 5.4). This runs on an Amazon EC2 large machine (m3.large) with a load balancer in front of it. There are 3 requests/second to a PHP file that returns ...
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147 views

failed ssh logins DOS: pam_systemd Failed to connect to system bus

After a couple of weeks of script kiddies attempting to login via SSH to my CentOS 7 box on EC2, it eventually stops responding on that port (and to http on port 80), and I have to reboot it. The ...
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93 views

forward subdomain with route 53 to ec2 instance with node js

I have node js serving both root site (non prefix) and app.mydomain with node js subdomain npm . how can I point to both of them using Route 53? as for now the root domain get request's from Route 53 ...
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96 views

Fabric: Using ssh_config settings on env.gateway

I have a relatively standard AWS setup, that looks like this: [ App server ] \ [ App server ] -- [ Dev gateway ] [ App server ] / Where the servers are only accessible over 22 from the gateway's ...
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53 views

EC2 CFN IAM: allow instances in ASG to manage their own volumes

I have an auto scaling group defined in a CloudFormation template. The launch configuration associated with the auto scaling group has an IAM instance profile attached. Is there any way to define a ...
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27 views

Multiple static IPs Amazon EC2

I want to have multiple sites with SSL on IIS (Windows 2008 R2 on Amazon AWS). I've read this other question and the documentation in Amazon where it explains how to add another IP. My question is, ...
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94 views

can't ssh on ubuntu, ec2 suddenly. stuck on “Sending env LANG = en_IN”

Suddenly I am not able to ssh (with pem file passwordless login & with password both) My pem file has not been changed, It was working fine till yesterday. Here is ssh -v output ...
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131 views

How to auto assign public IP for VMs imported from vSphere in AWS - EC2

I was trying to import a Linux VM running in my VMware infrastructure to my AWS-EC2 account using the ec2-import-instance CLI. The VM gets successfully imported to EC2, but on starting it up its not ...
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29 views

OpenSSH Won't Start on Ubuntu EC2 Instance

My Amazon EC2 instance's openssh server fails on boot ever since I scaled my instance. I have tried following these instructions here: ...
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94 views

can' t access ec2 instance for additional user with sftp or ssh - key refused

I keep getting server refused our key error with putty/public key rejected error in filezilla when trying to access my ec2instance with a new user. Access works fine for both ssh and sftp with the ...
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32 views

appropriate traffic to load test couchdb horizontal scaling

I'm designing the CouchDB backend to my web application, and I want to estimate how many GETs and PUTs per second I can achieve with a given number of instances. (Arguably I should be testing view ...
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62 views

Connect to a Server from my AWS EC2 instance

I have a app running on AWS EC2 which connects to a database in another server. The database connection Uri is as following, jdbc:XXX:172.18.2.107:3306/database This is what I got form my ...
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234 views

502 Bad Gateway from relocated instance on AWS EC2

I tried to move some instance from tokio region (which by the way, it's working normally) to sao paulo region, then I followed this basic steps to perform but when I launch the instance from the ...
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149 views

amazon ec2 - opencart seo url not working

I have installed opencart on my amazon ec2 server. I am trying to activate the seo url feature but it is not working. I have renamed .htaccess.txt to .htaccess in folder directory ...
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17 views

Cannot configure RD Gateway

I have a windows server 2012 base ec2-instance. This is joined to a domain. Have installed RDS service, but I need to make it a RD Gateway server. I was trying to configure session based desktop ...
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48 views

An ADDC for the domain could not be contacted

It's not first time I am installing AD server (2012) and connecting client to domain, but yes!! its the first time doing in AWS ec2 instances. The scenario is I have 2 instances, one with AD services ...
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80 views

How to tell if disk volume is instance store or EBS?

I have a number of volumes (same size) attached to a Windows instance in Amazon AWS. One of them is told to be an instance store. How do I tell which one? PS. testing the speed did not help, one of ...
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742 views

can't connect aws VPC private instance to internet through NAT

trying to install a LAMP stack on an aws instance in a VPC private subnet using Scenario 2 described here: http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Scenario2.html I've set everything ...
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220 views

FreeIPA Install on CentOS 7 - “Cannot contact any KDC”

I am trying to install a new stand alone instance of FreeIPA on CentOS 7. I am doing this in an Amazon AWS EC2 environment. The install completes flawlessly every time, however, when I attempt to ...
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85 views

Amazon ELB + EC2 Header mismatch

Preamble: I have an AWS Elastic Load Balancer in front of a Single Amazon EC2 instance. I have 3 other EC2 instances sending requests via curl to the Load Balancer. Direct requests to the EC2 ip has ...
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167 views

EC2 instance can't connect to RDS

I have created an EC2 instance and an RDS instance. Using Ubuntu and MySQL, RDS instance is public and not A-Z. I have created a security group that allows 3306 from anywhere on both Ingoing and ...
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47 views

Can you use isolcpus or other kernel parameters in AWS?

We have recently started using cpuset for certain network intensive processes and I want to set a system-wide default for everything else so it doesn't use the designated cores. After a few seconds ...
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25 views

Mount the other half of instance store volume

I have a running c3.xlarge EC2 instance on AWS. As listed in http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/InstanceStorage.html#StorageOnInstanceTypes , it should provide 2 x 40GB SSD instance ...
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19 views

SQL Server 2012 Web uses max 4CPUs. AZ RDS allows deployment on R3.2xLarge (8vCPU) instance. Why?

According to MS documentation, SQL Server 2012 Web Ed. is limited to use 4CPUs. However, Amazon RDS allows it to be deployed on R3.2xLarge instance. BTW, R3.2xLarge offers 8vCPUs. So is it helpful ...
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142 views

Unable to open redis 6379 for inbound on AWS EC2

I have two servers on EC2. One hosting my php application and other hosting my redis server. I am managing my php session and data on redis server. So on my php server I gave the ip:port as session ...
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83 views

Elastic Load Balancer connection draining causes a blank page for some web sessions

I'm running 3 EC2 instances behind an ELB with connection draining enabled (set to 300ms). When I remove an instance from it, I can see fewer and fewer web requests in the server log until eventually ...
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72 views

Best practice of using MongoDB Replica Set on AWS EC2

MongoDB needs at least three replica set members on independent locations to work automatic failover correctly. However, some of AWS Regions (such as ap-northeast-1) have only two Availability Zones. ...