Add Ansible integration for device management and deployment automation
- Added ansible/ directory with playbooks for: * deploy.yml: Update applications on devices from git * commands.yml: Execute arbitrary commands on devices * system_update.yml: OS updates and health checks * inventory.ini: Device and group configuration * README.md: Comprehensive Ansible guide * requirements.txt: Installation instructions - Added ansible_integration.py: Python module wrapping Ansible operations - Added utils_ansible.py: Updated utilities using Ansible instead of HTTP commands Key benefits: - Idempotent operations with error recovery - Comprehensive logging and backup - Multi-device orchestration - Better reliability and control - Replaces unreliable direct HTTP command execution
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ansible/deploy.yml
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ansible/deploy.yml
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---
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# deploy.yml - Deploy updates to Prezenta Work devices
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# Handles pulling latest code and restarting services
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- name: Deploy Prezenta Work Updates
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hosts: prezenta_devices
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gather_facts: yes
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serial: 1 # Deploy one device at a time to avoid service interruption
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vars:
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app_directory: "/srv/prezenta_work"
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git_branch: "dev"
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restart_service: true
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backup_before_deploy: true
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tasks:
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- name: Display deployment information
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debug:
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msg: "Deploying to {{ inventory_hostname }} ({{ ansible_host }})"
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# Pre-deployment checks
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- name: Check if app directory exists
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stat:
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path: "{{ app_directory }}"
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register: app_dir_stat
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- name: Fail if app directory doesn't exist
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fail:
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msg: "Application directory {{ app_directory }} not found on {{ inventory_hostname }}"
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when: not app_dir_stat.stat.exists
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# Backup current code
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- name: Create backup directory
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file:
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path: "{{ app_directory }}/backups"
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state: directory
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mode: '0755'
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when: backup_before_deploy
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- name: Backup current code
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shell: |
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cd {{ app_directory }}
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tar -czf backups/backup_{{ ansible_date_time.iso8601_basic_short }}.tar.gz \
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--exclude=.git \
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--exclude=__pycache__ \
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--exclude=data \
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--exclude=Files \
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.
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register: backup_result
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when: backup_before_deploy
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- name: Display backup created
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debug:
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msg: "Backup created: {{ backup_result.stdout_lines }}"
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when: backup_before_deploy and backup_result is not skipped
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# Pull latest code
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- name: Fetch latest from repository
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shell: |
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cd {{ app_directory }}
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git fetch origin
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register: git_fetch
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changed_when: "'Fetching' in git_fetch.stdout or 'Receiving' in git_fetch.stdout"
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- name: Checkout dev branch
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shell: |
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cd {{ app_directory }}
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git checkout {{ git_branch }}
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register: git_checkout
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- name: Pull latest changes
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shell: |
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cd {{ app_directory }}
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git pull origin {{ git_branch }}
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register: git_pull
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changed_when: "'Already up to date' not in git_pull.stdout"
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- name: Display git pull result
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debug:
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msg: "{{ git_pull.stdout }}"
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# Verify deployment
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- name: Check Python syntax
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shell: |
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python3 -m py_compile {{ app_directory }}/app.py
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register: syntax_check
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changed_when: false
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failed_when: syntax_check.rc != 0
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- name: Verify all modules compile
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shell: |
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cd {{ app_directory }}
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python3 -m py_compile *.py
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register: module_check
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changed_when: false
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- name: Verify configuration
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shell: |
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cd {{ app_directory }}
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python3 -c "import config_settings; print('✓ Configuration OK')"
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register: config_check
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changed_when: false
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- name: Display verification results
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debug:
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msg: "{{ config_check.stdout }}"
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# Restart application
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- name: Restart Prezenta application
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block:
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- name: Stop Prezenta service
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systemd:
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name: prezenta
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state: stopped
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daemon_reload: yes
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become: yes
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when: restart_service
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- name: Wait for service to stop
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pause:
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seconds: 2
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- name: Start Prezenta service
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systemd:
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name: prezenta
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state: started
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enabled: yes
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become: yes
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when: restart_service
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- name: Verify service is running
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systemd:
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name: prezenta
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state: started
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become: yes
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register: service_status
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until: service_status.status.ActiveState == "active"
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retries: 3
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delay: 5
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rescue:
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- name: Service restart failed, attempting manual restart
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debug:
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msg: "Attempting to restart application manually on {{ inventory_hostname }}"
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- name: Kill existing processes
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shell: |
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pkill -f "python3.*app.py" || true
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become: yes
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- name: Wait before restart
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pause:
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seconds: 3
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- name: Start application in background
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shell: |
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cd {{ app_directory }}
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nohup python3 app.py > data/startup.log 2>&1 &
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become: yes
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become_user: pi
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# Post-deployment verification
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- name: Wait for application to start
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pause:
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seconds: 5
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- name: Check application status via HTTP
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uri:
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url: "http://{{ ansible_host }}:80/status"
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method: GET
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status_code: [200, 404]
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timeout: 10
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register: app_status
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retries: 3
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delay: 2
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until: app_status.status in [200, 404]
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- name: Display application status
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debug:
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msg: "Application on {{ inventory_hostname }} is running"
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when: app_status.status in [200, 404]
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# Log deployment
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- name: Record deployment in log
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lineinfile:
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path: "{{ app_directory }}/data/deploy.log"
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line: "[{{ ansible_date_time.iso8601 }}] Deployed {{ git_branch }} from {{ ansible_user }}@monitoring_server"
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create: yes
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state: present
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- name: Log deployment summary
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debug:
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msg: |
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Deployment completed for {{ inventory_hostname }}
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Branch: {{ git_branch }}
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Status: SUCCESS
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Last git commit: {{ git_pull.stdout_lines[-1] if git_pull.stdout_lines else 'Unknown' }}
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post_tasks:
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- name: Send deployment notification
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debug:
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msg: "Deployment notification: {{ inventory_hostname }} updated to {{ git_branch }}"
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