Infrastructure as Code (IaC) is changing the way that we’re doing things. Some people think that it’s the motorway that we have to follow and be aligned with business, as a resume they want us to be agile.

The arrival of tools such as Ansible, Puppet, SaltStack, and Chef, have enabled sysadmins to maintain modular, automatable infrastructure. This time I would like to introduce the Terraform tool.

Terraform is a provisioning declarative tool that is based on the Infrastructure as Code paradigm. Terraform is a multipurpose composition tool: it composes multiple tiers (SaaS/PaaS/IaaS).

Terraform is not a cloud agnostic tool, but in combination with OpenNebula, it can be amazing. By taking advantage of the template concept it will allow us to deploy vm’s agnostically in different cloud providers, such as AWS, Azure or on premise cloud infrastructure.

A Terraform provider serving as an interop layer for an Ansible dynamic inventory script.

Read the introductory blog post for an explanation of the design motivations behind this provider.

When working with Ansible and Terraform, I felt there was a gap in the workflow, so I built a Terraform Provider for Ansible. It integrates with a Terraform Inventory script to connect machines in your Terraform state to Ansible. This article explains my thought process in designing this integration.

bpftrace is a high-level tracing language for Linux enhanced Berkeley Packet Filter (eBPF) available in recent Linux kernels (4.x). bpftrace uses LLVM as a backend to compile scripts to BPF-bytecode and makes use of BCC for interacting with the Linux BPF system, as well as existing Linux tracing capabilities: kernel dynamic tracing (kprobes), user-level dynamic tracing (uprobes), and tracepoints. The bpftrace language is inspired by awk and C, and predecessor tracers such as DTrace and SystemTap. bpftrace was created by Alastair Robertson.

It seems everyone uses GitHub these days (~8 million users, 20 million projects). It's not a bad solution, but there are some drawbacks (you might not want Microsoft looking at your private code), and whether you're just looking to host your own project or setup enterprise-wide git hosting, there are other ways to host your projects in Git. Let's take a look at some options below. Also, Comparison of git hosting options is a detailed analysis prepared by the Peers community in 2016.

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blkreplay is a GPL’ed userspace toolkit, driving the block layer of Linux (or other Unix-like OSes) while measuring latency and throughput of IO operations for later visualization (so-called “sonar diagrams” and others).

In addition to artificial loads like random read-write sweeps and various kinds of overload tests, blkreplay can replay natural loads which have been recorded by blktrace (or Windows DiskMon) at heavily-loaded production servers at big data centers.

Because The join domain account is often visible in your deployment answer file (unattend.xml of sysprep.inf) during the WinPE phase, it is important that this specific account does not have any more permission, than the bare minimum.. I often experience that a domain admin account is used for this job, which is a huge security breach. When i ask why this is, the answer is normally “ we can not find the information on how to create an account with only join domain rights”.