Long time since my last post. This one is not very technical post, but it’s a nice to have solution if you use grep usually. Are not you fed up to type vim and search the line after a grep command ? If yes, this post is for you. First of all, you may know that an alternative more user friendly to grep exist, called ag (perf comparison). I really like ag and grep, but something make me loose my time since several years and I’m pretty sure it’s your case too.

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Some of you may not be familiar with the terms “Rolling upgrade” or “Rolling restart". This is the action of upgrading or restarting a cluster without service interruption (alias zero downtime). In most cases, this is done node by node, but in fact it depends of the technology you’re managing and the number of active nodes in your cluster. At Nousmotards we have several Java Spring Boot applications running. Restarting one application can take up to 1 min.

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As I wanted to upgrade it and because it has been asked several time, I upgraded the consul-template Ansible role to manage official binaries (and upgrades). Here are the new vars: consul_template_version:'0.11.0'consul_template_arch:'linux_amd64'consul_template_http_src:"https://github.com/hashicorp/consul-template/releases/download/v{{consul_template_version}}/consul_template_{{consul_template_version}}_{{consul_template_arch}}.zip" You can of course find the role to Ansible Galaxy: https://galaxy.ansible.com/deimosfr/consul-template/ I hope you’ll enjoy this new version :-)

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For another personal project (that I can’t talk about for the moment ;-)), I wanted to have a Changelog file to get a better following of the infrastructure evolution (configuration management, scripts…all under git). Of course the documentation is very important, but when you do not write it at the same time you’re building the infrastructure, it may be complex to remember each little things you’ve done. That’s why a Changelog can help to understand how the infrastructure has been built step by step.

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A few months ago, I already talked about offloading SSL with Nginx. I also wanted to try it with HAProxy which can be more interesting in some cases. The good On HAProxy, the good thing is the simplicity to do it. First of all you need to have at least the version 1.5 of HAProxy so to get SSL support. Then you only need those lines to offload SSL: frontend frontend-https bind :443 ssl crt /etc/haproxy/ssl/server-unified.

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For my company, I recently had to find a good solution to make Snapshots from Instance IDs or from tags on AWS. I made several searches but unfortunately didn’t find what I was searching for. That’s why I started to make a tool to do this kind of job. It’s written in Python and requires the Boto library. Here is what you can do with Simple EC2 snapshots: The tool is open source and can be downloaded on GitHub :-).

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OpenStack Summit will take place in Paris in 2 days! I’m excited to be able to participate. Big thanks to eNovance/RedHat for it! To know more about the event, please follow the link.

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