Now I’m in jet lags and at the FOSDEM. The trip is continuing. Next posts should be related to FOSDEM.
Some of you may already know that I’ve been contacted by Packt Publishing to write a book.
As every aware persons asked me why I was contacted, here is the story :
When I was working for Linagora, I gave a training on advanced usage on MySQL/MariaDB. Unfortunately there weren’t slides on that subject at this moment and I had to make them all. That’s what I did and made an unbranded version for me as well.
I recently discovered DevDocs website. It’s an easy way to get a lot of informations on many different developments languages.
I hope you’ll enjoy that site as well : http://devdocs.io
I already talked about nftables and it has now been implemented in the 3.13 kernel !
For those who never heard of that, it’s a kernel built in replacement of iptables. All features are not there yet but should be implemented in 3.15.
If you like Packet Filter, you’ll be happy. If you’re not sure of the advantages of it, simply read that short comparison and you’ll be convinced : https://home.
I’ve recently updated some of my tutorials :
Optimizing Hard Drive performances : I’ve updated SSD subject Luks : added more information on how auto mount automatically at boot a crypted partition. Xtrabackup : corrected a non working command LXC : modified containers files to avoid boot issues APT-Pinning : Added the command to install a package from a designed repository Sed : forgotten to add -i option which is so important Vagrant : Added an example to the quick tutorial
Varnish is a real powerful cache solution for web servers. He is unfortunately not able to do it over SSL. Anyway, there is a solution by offloading it with Nginx. Here is a schema to get a better understanding :
Nginx decrypt SSL, pass it in clear to Varnish. If Varnish got it, replies to Nginx which crypt back data to send to user.
I’ve made a full documentation to get it working well, follow the link.
In addition of object storage, Ceph is able to provide block devices. Ceph’s RADOS Block Device (RBD) provides access to block device images that are striped and replicated across the entire storage cluster.
For example this is used to store Virtual Machines on OpenStack. With that solution, you’ve got a real fault tolerance system for your VM and distributed.
The RBD part is an easy task when you’ve already setup a Ceph cluster.
