#66 Managing Servers with Ansible

Summary

A look into the Drifting Ruby network architecture and how I manage deployments with Ansible.
deployment 14:02

Resources

Summary

# Passwordless Authentication
# Copy your public key to the remote host
cat ~/.ssh/id_rsa.pub | ssh [email protected]_host 'cat >> .ssh/authorized_keys'
# Do not require password for sudo
# Create a file in /etc/sudoers.d/USERNAME
USERNAME ALL=(ALL) NOPASSWD:ALL

# Terminal
brew install ansible

# inventory
[servers]
DR1   ansible_host=192.168.1.25   ansible_user=passenger   
DR2   ansible_host=192.168.1.26   ansible_user=passenger
DR3   ansible_host=192.168.1.21   ansible_user=passenger

# entry_point.yml
- hosts: DR1
  vars_files:
    - "vars/public.yml"
  remote_user: "{{remote_user}}"
  roles:
    - app-update
    - run-migrations
    - restart-nginx
    - restart-sidekiq

- hosts: DR2,DR3
  vars_files:
    - "vars/public.yml"
  remote_user: "{{remote_user}}"
  roles:
    - app-update
    - restart-nginx
    - restart-sidekiq

# - hosts: servers
#   vars_files:
#     - "vars/public.yml"
#   remote_user: "{{remote_user}}"
#   roles:
#     - app-update
#     - restart-nginx
#     - restart-sidekiq

# Terminal
# Create Role Templates
ansible-galaxy init app-update
ansible-galaxy init restart-nginx
ansible-galaxy init restart-sidekiq
ansible-galaxy init run-migrations

# roles/app-update/tasks/main.yml
---
- name: Git Pull from Version Control
  command: git pull
  args:
    chdir: /home/passenger/drifting_ruby

- name: Bundle
  command: bash -lc "bundle"
  args:
    chdir: /home/passenger/drifting_ruby

- name: Precompile Assets
  command: bash -lc "RAILS_ENV=production rake assets:precompile"
  args:
    chdir: /home/passenger/drifting_ruby

roles/restart-nginx/tasks/main.yml
--- - name: Restart Nginx raw: sudo service nginx restart
roles/restart-sidekiq/tasks/main.yml
--- - name: Restart Sidekiq raw: sudo service sidekiq restart
roles/run-migrations/tasks/main.yml
--- - name: Run Migrations command: bash -lc "RAILS_ENV=production rake db:migrate" args: chdir: /home/passenger/drifting_ruby

# vars/public.yml
remote_user: passenger

# Terminal
# Run Ansible Playbook
ansible-playbook entry_point.yml -i inventory