Ansible and RHCE Automation: Roadmap, Lab and Skills Baseline
Automation begins with a known control node, two disposable managed nodes and a learner who can already perform RHCSA tasks manually.
Learning path
Ansible and RHCE Automation Learning Path
24 ordered lessons that move from foundations into implementation, troubleshooting, architecture decisions, security, cost control, and operational readiness.
24lessons · start at Lesson 001
Curriculum
Continue in lesson order.
Install Ansible Development Tools on RHEL 10
The control node needs an attributable Ansible version, local documentation, linting tools and a clear support boundary between ansible-core, AAP and community content.
Prepare Managed Nodes: SSH, Python and Privilege Escalation
Ansible normally reaches Linux nodes through SSH, discovers Python and uses privilege escalation only for tasks that require it.
Ansible Configuration and Project Layout
Ansible can read configuration from several locations, so a reproducible project must prove which file and settings are active.
Ansible Inventories, Groups, Host Variables and Patterns
Inventory describes managed identities, group relationships and connection data; patterns choose a subset but do not replace authorization.
Ad Hoc Commands, Modules and Local Documentation
Ad hoc commands are useful for observation and one-time bounded actions, while repeatable desired state belongs in reviewed playbooks.
Playbooks, YAML, Plays, Tasks and Idempotence
A play binds hosts and execution policy to ordered tasks; modules should describe the required state instead of replaying imperative commands.
Variables, Precedence, Registered Results and Prompts
Variables separate reusable automation from environment data, but duplicated definitions and high-precedence overrides can make the effective value difficult to explain.
Facts, Custom Facts and Magic Variables
Facts describe observed managed-node state, while magic variables expose inventory and execution context; neither should become an accidental source of secrets.
Loops, Conditionals, Tests and Filters
Loops apply one task contract to structured items, while conditions and filters decide whether and how each host-specific value is used.
Handlers, Failure Handling, Blocks and Recovery
Handlers defer side effects until notified, while blocks make expected failure, recovery and always-run evidence explicit.
Automate Files, Content, Links and Archives
Ansible has distinct modules for metadata, managed content, bounded edits, transfer and archives; choosing the wrong one can overwrite ownership or duplicate text.
Jinja Templates, Filters and Configuration Validation
A template should turn reviewed data into a complete configuration, validate the candidate file and notify a handler only after a real change.
Ansible Vault, Secrets and no_log Boundaries
Vault protects secret data at rest; identity selection, runtime injection, output control and rotation determine whether it remains protected in operation.
Create and Use Ansible Roles
A role packages one responsibility with low-precedence defaults, tasks, handlers, files, templates, tests and an explicit input contract.
Ansible Content Collections and Galaxy
Collections distribute modules, plugins, roles and documentation; a reproducible project pins versions and records the source used to install them.
Automate Packages, Repositories and systemd Services
Repository trust, package state, configuration validation, handler timing and post-reboot service state form one operable transaction.
Automate Users, Groups, sudo, cron and Timers
Account lifecycle automation must preserve stable IDs, key provenance, validated sudo policy, predictable removal and observable scheduled execution.
Automate Storage, Filesystems, LVM, Swap and Mounts
Storage automation starts with verified device identity and backups because a syntactically correct play can irreversibly format the wrong block device.
Automate NetworkManager, firewalld and SELinux
Network, listener, firewall and SELinux policy must agree; change them in an order that preserves the automation connection and provides timed recovery.
Execution Environments, ansible-navigator and Builder
An execution environment packages ansible-core, Runner, collections and required Python/system dependencies into a versioned container image.
Git, ansible-lint, Syntax Checks and CI
Automation code needs small reviewable commits, lint and syntax gates, secret detection, disposable integration tests and controlled environment promotion.
AAP Controller: Projects, Inventories, Credentials and Job Templates
AAP controller separates projects, inventories, credentials, execution environments, templates, RBAC and retained job evidence so teams can delegate runs without distributing secrets.
Ansible RHCE Practical Capstone and Troubleshooting
The capstone starts from fresh RHEL nodes and requires inventory, roles, Vault, repositories, services, storage, security policy, validation, recovery and retained evidence under time pressure.