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Devops

Automated configuration of systems running MacOS or Raspbian Linux

Prerequisites

  • Apple system with the latest MacOS installed
  • Raspberry Pi 2, 3 or 4 with Raspbian OS installed

Configure your system

preparation

git clone https://github.com/stuvie/devops.git
cd devops
  1. read and customize the scripts in the bin folder
  2. read and customize the config files in the files folder, certainly hosts, resolv.conf and dhcpcd.conf

Generally, everything you'd want to customize is at the top of each script

Step 1: Configure system and install a few utilities

sudo ./bin/step1 HOSTNAME IP_ADDRESS

For example:

sudo ./bin/step1 pi0.fywss.com 10.20.1.40 | tee step1.out
sudo ./bin/step1 pi2.fywss.com 10.20.1.42 | tee step1.out
sudo ./bin/step1 pi3.fywss.com 10.20.1.43 | tee step1.out
sudo ./bin/step1 pie.fywss.com 10.20.20.2 | tee step1.out
sudo ./bin/step1 berry.fywss.com dhcp | tee step1.out

This script will make a backup copy of /etc under /bak/fresh, create an admin user account (steve, by default) and improve the security of your ssh service by disabling password authentication.

On Linux, it will also install core utilities via apt-get and setup a static IP address. When complete, reboot. Make sure system comes up with the correct hostname and IP address.

Step 2: Install development and ops tools

On MacOS, step2 installs packages via brew, which must not be run as root:

./bin/step2

On Linux, step2 installs packages for configuring and monitoring a system:

sudo ./bin/step2

When complete, you can configure nginx, prometheus, etc.

After step2, the system should be configured via ansible.

Moving to Ansible

Modify ansible.cfg and inventory

Modify the inventory file to suit your environment. Change the hostnames to your liking.

If your SSH user on the Raspberry Pis are not the Raspbian default pi user modify remote_user in the ansible.cfg.

Confirm ansible is working with your servers

ansible -m ping all
ansible -m ping master

Deploy Tools and Toys

ansible-playbook common.yml
ansible-playbook toys.yml
ansible-playbook debug.yml

Todo

  • expand ansible playbooks
  • nginx ssl config should use template
  • add support for other operating systems
  • monitoring tools configuration

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