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Separate your setup and deploy playbooks I started porting my setup from Chef to Ansible a few weeks ago. Having had plenty of experience with Chef gave me a pretty good idea of what I wanted to achieve. One of the main advantages I see in Ansible is the ability to drive your server setup via ssh from your own machine.
Given the above points, this article is about running Ansible from your local machine. It assumes that the target hosts are only accessible via ssh, and helps setup Vagrant in the same way, as if it was a VPS. Nevertheless, during my venture into Ansible I immediately ran into some sticking points, which I knew had to have elegant solutions, yet they were hard to search for online, or easy to miss in the docs.
Build a convenient local playground Just a few servers that can talk to each other is all you want. Your multiple production machines, their interactions, their firewalls and dns config should all just be reproduced on a smaller scale.
Is that really so hard? Path to failure You start hooking up ansible provisioner in Vagrant. Path to success There are 4 quick steps to having a very convenient setup.
Make it easy to sync your hosts file with your VMs This assumes you have vagrant installed. A very convenient vagrant plugin can automatically add and remove hosts every time you add or destroy VMs. You will notice it asking you for your sudo password every time it tries to do that.
Automate adding your pub key to VMs I wrote a small ruby script for Vagrant which lets you conveniently put your pub key into VM akin to how Digital Ocean would bootstrap your machine with your key.
Absolutely do not do this for your production servers. This is only safe on a private vagrant network with your own VMs. This is a reference to my script you downloaded earlier. This way you can ssh as root without a password.
Based on my conversations with friendly neighborhood sysadmins, passwordless sudo gives you no more security than bootstrapping via root does. All it does is add an extra useless step to every operation. As far as using Ansible as Vagrant provisioner: In essence, I want my starting point on Vagrant to be almost exactly like if I used an actual live VPS, and I like to keep it simple by making a good use of the default config.
In my case it means a machine with a hostname, IP, and a root user with my key authorized. Teach Ansible to talk to Github on your behalf In an effort to keep things simple, I avoid having to create extra ssh keys on my servers and add them to Github.
Instead there is a way to let servers access Github on your behalf without creating any extra identities. Ansible would take the identity of the user who initiated the playbook run, and forward it to the host, which in its turn will use it to talk to Github.
This mechanism is called agent forwarding.
You might not want this if you have a complex deploy pipeline, where a deploy server acts autonomously and has its own identity, but Ansible makes it so easy to orchestrate various processes, that I decided not to build one for my setup. So there is a setting for this.
Create a file right here in the root dir called ansible. No need to add new keys to github. That key is easily obtained by using the following command.Affordable Papers is an online writing service which has helped students from the UK, US, and Europe for more than 10 years.
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