SolrCloud in EC2. Dealing with changing IPs
If you use Amazon EC2 service for a while, you probably aware of the fact that any time you stop/start (reboot) your instance the underlying IP might change. We need to account for that when designing new services in EC2.
Lets see what happens to SolrCloud after IP change:
Note those grayed out IPs. …
Nginx X-Accel-Redirect with proxy_pass and Host change..
I already wrote about using Nginx and X-Accel-Redirect. But today I would like to get back to it, since recently I’ve spent a lot of time trying to solve similar problem..
The problemo
We have a cdn in front of our sites and multiple pointers to static assets like a.static-example.com b.static-example.com etc. …
AWS AutoScale with SPOT instances and dynamic tagging
I was always fascinated by idea of fully automated infrastructures, where instances come and go according to particular factors like network traffic or load increase and you just observe this process form the distance allowing system to heal itself.
Now that these days we mostly deal with Cloud providers and their great APIs, …
Enable mysql slow_query_log on the fly, no reboot required
I always forget how to do this, so finally decided to write it down (I’m talking about mysql 5.1):
- Login to mysql with administrator rights
-
Inspect current variables before changing those (optional):
mysqlshow variables like 'long_query_time' \G; ...
Internal redirect to another domain with proxy_pass and Nginx
Let say we have multiple sites a.com b.com and c.com and created some shared resourse (widget) under shared.com. For simplicity just imagine Disqus where you need to embed comments widget (shared resourse) to every site, but don’t want to deal with AJAX “same origin policy” problems and Iframes ( actually sometimes Iframes are not so bad and could be used with care, …
Use Nginx to proxy files from remote location using X-Accel-Redirect
Nginx supports X-Accel-Redirect for local files with no extra hassle, but what happens if you need to serve files located in some remote location like s3 and you don’t want to expose direct urls to the files? Sometimes you may want that to have control over stats or to keep an option to migrate to another file server without changing original urls. …
Percona mysql install problem with Chef on Linode – be aware!
###BAH!
Fresh Linode instance of Ubuntu 12.04 LTS.
Super simple recipe ( stripped down for debugging ).
include_recipe "apt" include_recipe "ohai" include_recipe "mysql::percona_repo" include_recipe "mysql::server"
I tested installation numerous times with the same OS version with Vagrant with no problems, …
Provision and Bootstrap AWS instances with Chef
This is continuation of the previous post called Provision with Chef – baby steps. Today we going to talk about the process of bootstrapping instances with Chef used by FastCompany
At this point I assume that you already got chef repo setup and wondering how you could use it to configure your fresh instances. …
Mastering chef-solo: deploy to target machines and automatic run on boot
This post will cover some basics behind chef-solo and the way I use it to configure machines.
With recent changes to attributes introduced in Chef 11 chef-solo became even more useful for small infrastructures and testing cookbooks with Vagrant.
What
As you probably already know chef can function in two modes:
- chef client and server ( one server many clients ) – …
Secure data bag items with chef solo
How to generate encrypted data bag item with knife and chef-solo
This post is mostly a memo to myself, because I often forget how to how to create encrypted data bag items..
Here is the deal. We know how to generate regular data bag items with knife: knife data bag create DATA_BAG_NAME DATA_BAG_ITEM ( for those who didn’t know ). …