2
votes
0answers
134 views

Ubuntu 14.04 / Apache 2.4 causes kernel fault on Amazon EC2 medium instance

Got a disturbing crash while performing 'apachectl stop'. General system: $ uname -a Linux www.example.com 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux ...
0
votes
3answers
134 views

Yum update problems on AWS with missing requirements and duplicate sendmail

I am running an AWS VM and tried: sudo yum update Result: Error: Protected multilib versions: sendmail-8.14.4-8.12.amzn1.x86_64 != sendmail-8.14.4-7.9.amzn1.i386 You could try using ...
0
votes
1answer
65 views

Does EC2 need Xen kernel?

I am on to creating a new AMI image for CentOS 6.4. Until now I was on CentOS 5.6. I started with the CentOS market place image, and what I noticed is that it is running a regular kernel and not xen ...
-1
votes
1answer
239 views

Where to find source of an Amazon EC2 compatible kernel

I have some issues with finding the source code of Amazon EC2 compatible kernels. There is a tutorial in Amazon EC2 documentation of how to run instances with custom kernels, but those must be from ...
0
votes
1answer
539 views

How can I diagnose and fix frequent 100% cpu utilization from kernel?

I have an Amazon EC2 micro instance running an old 2.6.16 kernel. It runs postfix, apache, and mysql. During normal loads, it's load average is around 0.05, and it runs this way 95% of the time or so. ...
3
votes
1answer
2k views

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 ...
1
vote
1answer
134 views

EC2 kernel decision and issues with creating a new machine with my AMI

I could really use some advice. I started a new instance on EC2 using Amazon's AMI and during the deployment process I selected a Kernel ID of "Use Default". I then configured my server the way that ...
6
votes
2answers
3k views

Converting an EC2 AMI to vmdk image

I've come quite close to getting Amazon Linux to boot inside VirtualBox, thanks to this answer and these websites. A quick overview of the steps I've taken: Launch EC2 instance with Amazon Linux ...
2
votes
2answers
3k views

mkfs refuses to format device in the claim it's mounted when actually it is not

This is the problem: root@ip-10-126-247-82:~# mkfs.ext4 /dev/xvda3 mke2fs 1.41.14 (22-Dec-2010) /dev/xvda3 is mounted; will not make a filesystem here! And this is the debugging: ...
1
vote
2answers
2k views

task blocked for more than 120 seconds

I'm getting a lot of stuff like this on my ec2 instance: kernel: [141720.410047] INFO: task kjournald:14019 blocked for more than 120 seconds. kernel: [141720.410205] INFO: task flush-202:112:2005 ...
4
votes
5answers
2k views

Reboot fails on RHEL 6.1 after kernel update on Amazon EC2

Everytime I start a new RHEL instance, I like to perform a yum update to start with the most up-to-date system. However, everytime I try to reboot the instance after that, the instance never goes ...
0
votes
1answer
1k views

How do i view / enable kernel logs on an ec2 instance (amazon linux)?

I've got a amazon ec2 server that i'm playing around with TCP settings in the sysctl.conf to increase the number of concurrent TCP connections it can handle, and i want to be able to view the kernel ...
2
votes
1answer
114 views

Do I need to manually administer EC2 kernel updates?

I run some Ubuntu Server instances on EC2, and I always install the latest apt security updates. It only just occurred to me that AMIs have a fixed AKI (kernel ID) / that Amazon only has a certain ...
0
votes
1answer
111 views

Strange Amazon EC2 issue with AKIs. Please help me understand

I am booting up some Amazon EC2 instances. Specifically, Alestic instances in us-east for Ubuntu 10.04, 10.10 and 11.04. When I log into those machines I can use "uname -a" to check the kernel ...
4
votes
7answers
1k views

Linux freezes every few seconds

We're having an issue where one our Linux boxes (Ubuntu 10.04 LTS, running on EC2 with a quadruple-large size, 68GB of RAM and 8 virtual cores with 3.25GHz each) freezes up every few seconds. Typing ...
3
votes
1answer
939 views

EC2 issue using PV-Grub and custom kernel: error 21 selected disk does not exist

Over on EC2 I am trying to setup AMI's for PLD-Linux that use the new features that allow running custom kernels from inside the AMI using PV-Grub. I've setup custom AMI's many times before but can't ...
1
vote
2answers
268 views

Is it prudent to ignore all kernel updates on Amazon EC2 instances?

Given that it's impossible to "aptitude update" your way to a new kernel on an Amazon EC2 instance, I was wondering if it ever makes sense to apply kernel updates. My guess is no, and that I should ...
4
votes
2answers
448 views

Experience with other EC2 kernels

I'm curious if any of you have used any of the non-amazon-provided EC2 kernels with success? Canonical seems to provide newer kernels (2.6.28, eg), but there are some mixed reviews about their ...