Ansible vs Puppet 2026: Configuration Management

Ansible is agentless and imperative. Puppet is agent-based and declarative. Ansible uses YAML. Puppet uses its own DSL. These differences determine which tool fits your team and infrastructure.

Architecture

Aspect	Ansible	Puppet
Agent	Agentless (SSH)	Agent (puppet-agent on every node)
Language	YAML (playbooks)	Puppet DSL (manifests)
Execution	Push (ad-hoc or scheduled)	Pull (agent polls every 30 min)
Server	Optional (AWX/AAP)	Puppet Server (required)
Model	Procedural (tasks run in order)	Declarative (desired state)
Transport	SSH / WinRM	HTTPS (agent → server)
Certificate management	SSH keys	Built-in PKI (automatic)

Language comparison

Ansible (YAML)

- name: Configure web server
  hosts: webservers
  become: true
  tasks:
    - name: Install nginx
      ansible.builtin.package:
        name: nginx
        state: present

    - name: Deploy config
      ansible.builtin.template:
        src: nginx.conf.j2
        dest: /etc/nginx/nginx.conf
      notify: Restart nginx

    - name: Start nginx
      ansible.builtin.service:
        name: nginx
        state: started
        enabled: true

  handlers:
    - name: Restart nginx
      ansible.builtin.service:
        name: nginx
        state: restarted

Puppet (DSL)

# manifests/webserver.pp
class webserver {
  package { 'nginx':
    ensure => installed,
  }

  file { '/etc/nginx/nginx.conf':
    ensure  => file,
    content => template('webserver/nginx.conf.erb'),
    require => Package['nginx'],
    notify  => Service['nginx'],
  }

  service { 'nginx':
    ensure => running,
    enable => true,
  }
}

Both are readable. Ansible tasks run in order — you control the sequence. Puppet declares desired state — the agent figures out the order based on dependencies.

Drift management

Aspect	Ansible	Puppet
Detection	Only during explicit runs	Continuous (every 30 min)
Remediation	Manual (re-run playbook)	Automatic (agent enforces state)
Reporting	AWX/AAP reports	Puppet Enterprise console

Puppet’s continuous enforcement is its strongest advantage — if someone manually changes a config file, the agent reverts it within 30 minutes. Ansible only detects drift when you run a playbook.

Scale

Nodes	Ansible	Puppet
10	Instant	Overkill
100	Seconds (parallel SSH)	Natural
1,000	Minutes (forks)	Agent pull scales
10,000+	AAP with mesh topology	Puppet Server + compile masters
Drift enforcement	Not continuous	Continuous (agent-based)

Ecosystem

Feature	Ansible	Puppet
Content	Galaxy (10,000+ collections)	Forge (6,000+ modules)
Testing	Molecule, ansible-lint	PDK, rspec-puppet, Litmus
Cloud	Extensive	Cloud modules
Network	Excellent	Limited
Enterprise	Red Hat AAP	Puppet Enterprise (Perforce)
Community	Very large, growing	Established, stable
AI assistant	Ansible Lightspeed	None

Decision guide

Choose Ansible when:

Agentless — cannot or prefer not to install agents
Team prefers YAML over learning a DSL
Network automation (routers, switches, firewalls)
Ad-hoc tasks and orchestration beyond config management
Faster adoption — hours to first playbook
Red Hat ecosystem (AAP, Satellite, RHEL)

Choose Puppet when:

Continuous drift enforcement — automatic remediation every 30 minutes
Large fleet (10,000+) where agent-based pull scales naturally
Declarative model — define what, not how
Existing Puppet infrastructure — migration cost is significant
Compliance reporting with Puppet Enterprise
Team is comfortable with the Puppet DSL