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Showing posts with the label DNS

Setting a hostname for your Amazon AWS EC2 server running RHEL or CentOS 7

So it turns out that setting your AWS EC2 server's hostname to be persistent across reboots is a surprising pain in the ass, at least with my usual OS of choice - RedHat/CentOS Linux. If you're like me, setting a hostname is the sort of trivial non-task that at this point you really feel like you dont need to RTFM  to figure out. You know about `hostnamectl set-hostname`. You've tried `nmcli general hostname`. You've manually set /etc/hostname. None of its persists past a reboot. Which can make life very difficult for those planning to use EC2 for email or dozens of other tasks. Here's how to do it the right way, the first time. I'll also describe some circumstances that setting your own hostname will break things, and why its such a hassle to get this done in AWS in the first place. Amazon relies on cloud-init to manage a variety of initialization tasks for its cloud servers; cloud-init was originally built to support Ubuntu images , but it is now used fo

A New URL

Hey all - I have been able to reacquire one of my domains that were so viciously stolen from me by domain squatters some time ago. So, you can now visit the site using www.joshwieder.net . Keep in mind that all links to joshwieder.blogspot.com will continue to work.

Amazon EC2 Connectivity Failures - 10/4/2014

I have seen indications of periodic connectivity issues impacting Amazon's EC2 Cloud Computing architecture. Personally, I have encountered issues with connecting to Amazon's Yum repository hosts from EC2 instances. Amazon has published Outage notifications of brief connectivity and DNS failures impacting US-EAST-1 Availability zone between October 2nd and October 4th. However, my EC2 instances are within the US-WEST-2 Availability zone and I am experiencing issues today, October 4th 2014 at approximately 11:30 AM EST. For example: # yum provides seinfo Loaded plugins: amazon-id, rhui-lb epel/x86_64/filelists_db         | 4.7 MB  00:00:01 rhui-REGION-rhel-server-optional/7Server/x86_64/filelists_db    | 3.2 MB  00:00:00 https://rhui2-cds01.us-west-2.aws.ce.redhat.com/pulp/repos//content/dist/rhel/rhui/server/7/7Server/x86_64/os/repodata/e5ee2c196ee6525998525a2bf74bb40608dce199-filelists.sqlite.bz2: [Errno 14] HTTPS Error 404 - Not Found T