why am i moving my blog away from wordpress.com?

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WordPress is nice a platform, I liked everything except following

    I am planning to write about code/scripts and wordpress.com’s syntax highlighter is not that great

    No support for google analytics

    my DNS to wordpress blog mapping require $13/year

Yesterday, I migrated my blog to tumblr and it supports all of the above.

I had to purchase a theme for $18(one time) to give the new blog a minimalist look.

see you at http://hrahman.in

test ELB before the actual DNS cutover

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Imagine you are moving your production setup from non ELB to ELB based architecture.

Once the ELB based setup is done, your QA/Ops team would want to test the ELB based setup before the actual DNS cutover.

Here are few testing methods

  • host file entry
  • curl with host header
  • curl with –resolve option

Before we take next step, please make sure you find the IP(s) of your ELB using dig or nslookup

e.g,

dig +short testelb-test-594255028.us-west-2.elb.amazonaws.com
54.218.42.18

Now let me explain each method.

  • host file entry

add following to the /etc/hosts file

(Amazon gives you ELB CNAME but hosts file entry woud not work with CNAME mapping)

54.218.42.18 <your production>.dns.entry.com

test <your production>.dns.entry.com via browser or curl

  • curl with host header
curl -H 'Host: <your production>.dns.entry.com' http://54.218.42.18/something
  • curl with –resolve option
curl --resolve '<your production>.dns.entry.com:80:54.218.42.18'  http://<your production>.dns.entry.com/something

Incase of https testing, curl –resolve works where as  curl -H will not.

Important point to remember: Do not hardcore ELB IP address for load testing as whenever ELB autoscales, IP may change.

Share below if you know a different/better way of testing this scenario.

a simpler backup method for your blog

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I like my new blog, the theme is minimal, writing a new post is easy ( thanks to fine folks at Wordpress)

As an ops guy, the day I started blogging, I also thought about backup 😉

While Wordpress gives you import/export XML feature, I wanted a backup which is platform independent.

Here is the simplest ever command you can ever  to backup your complete blog ( of-course this is not limited to Wordpress)

wget -Nrkpl 0  <your blog>

eg: wget -Nrkpl 0  https://opstribe.wordpress.com/ (this will create a directory with name opstribe.wordpress.com and download all the contents under it)

The best part about this command is that it also gives you a local copy of the blog.

So basically the backup can also be used to locally view your blog (open index.html) or share your blog.

command explained:

-N Turn on time-stamping

-r Turn on recursive retrieving

-k After the download is complete, convert the links in the document to make them suitable for local viewing

-p This option causes Wget to download all the files that are necessary to properly display a given HTML page

-l 0 Specify recursion maximum depth level depth(0=infinite)

If want to further simplify, please replace  -Nrl 0 with -m(–mirror) (-m is equivalent to -r -N -l inf –no-remove-listing).

So, wget -mkp  https://opstribe.wordpress.com/ works too.

If you like to have a daily/weekly/monthly backup, you may use cron job (*nix systems) to schedule your backup.

What’s your backup method?

get on with git

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We use git for version controlling our infrastructure codes(mainly puppet). Some of our team members especially new members wanted to learn git in bit more detail.  I was more than happy to share what I knew; only to realize later that I did not know enough 🙂

This video gave me lot of basics and I suggest everyone to watch it.

You can get on with git too and see if my presentation deck helps..

http://www.slideshare.net/pk.habi/get-on-with-git

lean manifesto for infra ops automation

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Experience is a dear teacher – Benjamin Franklin

Working for a startup teaches you a lot. It is great to be part of a team who code a lot for infrastructure tooling and automation.I have been following lean startup and lean manufacturing and thought we should have a lean manifesto for infra ops automation too.Here is what I have been adding to my Evernote…please add your thoughts.
  • Make sure the tool provides some value to the team
  • Do not reinvent the wheel: Is there any tool already available or can be built up on?
  • Follow Unix Philosophy
    • Small is beautiful.
    • Make each program do one thing well
    • Store data in flat text files (config files, easy to manag by config management tools)
  • First, build a minimal viable product – MVP ( prototype)
  • Ship it (MVP) – seek feedback – reiterate and reiterate
  • Store the code in a version control repository
  • Do comment inline the code
  • Document during and after
  • Peer Review: Any automation project having larger impact to the team/organization should be reviewed and planned
  • Build the tool as if you are planning to open source it (I read this idea somewhere in the web and made lot of sense to me)
  • Make sure you have a working manual process before you automate.