Stud is the “Scalable TLS Unwrapping Daemon” written by bumptech and used by 85million bump users. I use it to offload SSL connections in front of haproxy for really scalable websites. It’s not so much that I need to scale massively, but it does allow me to run on really small (i.e. cheap) servers. I’m aware that the development branch of HAproxy now supports SSL directly, but as yet I have not seen any performance tests so for now I will stick with stud.
I have previously built stud on Debian Linux and the build process is really simple; make and then make install (once openssl-devel in installed and or course the utilities gcc and make too!)
But I’ve recently moved over to Centos as my server OS of choice and ran into some problems whilst building stud. The error reported when I ran make was file ev.h not found.
So, I used yum to install libevent/libevent-devel, but I still got the same error! It turns out that libev and libevent are not the same thing!
I had to manually download and install libev/libev-devel because they are not in the yum repository.
The versions I installed can be downloaded from here:
http://dl.fedoraproject.org/pub/epel/6/x86_64/libev-4.03-3.el6.x86_64.rpm http://dl.fedoraproject.org/pub/epel/6/x86_64/libev-devel-4.03-3.el6.x86_64.rpm
The above libs are for Centos 6 64 bit (I’m running Centos 6.4 64bit). Other versions can be found on the same site, http://pkgs.org/
I installed tham using the yum command:
yum localinstall libev-devel-4.03-3.el6.x86_64.rpm libev-4.03-3.el6.x86_64.rpm<Even after installing libev the make still failed. It seems that the header files were not installed to the correct place.
I simply copied the following file into the common libs folder:
cp /usr/include/libev/ev.h /usr/include<br />Now, finally, I was able to make and install stud!