What Are Ansible Tower and AWX
Ansible Tower is Red Hat's commercial, supported web-based control plane for Ansible, providing a dashboard, REST API, role-based access control, and centralized logging on top of core Ansible. AWX is the upstream open-source project that Tower is built from, released by Red Hat under the AWX Project umbrella, and it receives new features first before they are hardened into the commercial Ansible Automation Platform release.
Cricket analogy: Like the BCCI running a national league on top of local cricket clubs, Tower/AAP adds central governance and broadcast infrastructure over the raw sport that AWX represents in its open, community form.
Job Templates and Workflows
A job template in Tower/AWX bundles a playbook, an inventory, a set of credentials, and extra variables into a single reusable, launchable unit that can be triggered from the UI, API, or a schedule without anyone needing shell access to the control node. Workflow templates chain multiple job templates together into a directed graph, letting you branch on success or failure — for example running a provisioning job, then a configuration job only if provisioning succeeded, then a notification job regardless of outcome.
Cricket analogy: A job template is like a pre-set fielding plan a captain such as Rohit Sharma locks in before the toss, while a workflow is the full match strategy chaining powerplay, middle overs, and death overs with branch points for how the innings unfolds.
# job_template.yml — created via awx CLI or Tower UI, shown here as awx-cli export
name: "Deploy Web Fleet - Production"
job_type: run
inventory: "AWS Production"
project: "platform-playbooks"
playbook: "deploy_web.yml"
credentials:
- "AWS Prod Read-Only"
- "Vault Password - Prod"
extra_vars:
env: production
release_channel: stable
survey_enabled: true
ask_variables_on_launch: false
notification_templates_error:
- "Slack - platform-alerts"Credentials, RBAC, and Surveys
Tower/AWX credentials store secrets such as SSH keys, cloud API tokens, and Vault passwords in encrypted form in the database, and they are attached to job templates by reference so playbook authors never see or type the actual secret. Role-based access control lets administrators grant teams permission to execute, edit, or admin specific job templates and inventories without exposing the underlying credentials or the ability to modify playbook source, while surveys expose a controlled web form so a non-technical requester can trigger a job template and supply only the runtime variables they're allowed to set, like an environment name or ticket number.
Cricket analogy: Storing credentials centrally is like a franchise keeping player contracts locked in the board office rather than letting each player negotiate directly, so a physio can access medical clearance without ever seeing salary figures.
AWX is the upstream open-source project; Red Hat repackages hardened releases of it as Ansible Automation Platform (AAP), the modern successor to the standalone 'Tower' product name.
Scheduling and Notifications
Scheduled jobs in Tower/AWX run on a cron-like recurrence so routine tasks such as patch scans, compliance checks, or nightly backups execute automatically without manual triggering, and each schedule can carry its own extra variables so the same job template behaves differently on weekdays versus weekends. Notification templates integrate with services like Slack, PagerDuty, and email so that job success, failure, or approval-pending states push alerts to the right channel automatically, which is essential once dozens of scheduled jobs are running unattended and a silent failure could otherwise go unnoticed for days.
Cricket analogy: Scheduled jobs are like a groundskeeper's fixed pre-match pitch inspection routine that runs automatically every matchday morning, while notifications are like the stadium announcer alerting officials the moment a pitch report flags an issue.
Never hardcode secrets into inventory variables or extra_vars passed at job launch — even though Tower encrypts credential objects, plaintext extra_vars are visible in job output and audit logs.
- AWX is the free upstream project; Tower/AAP is Red Hat's commercial, supported repackaging of it.
- Job templates bundle playbook + inventory + credentials + variables into one launchable, API-triggerable unit.
- Workflow templates chain job templates into a graph with success/failure/always branching.
- Credentials are stored encrypted and referenced, so secrets are never exposed to playbook authors.
- RBAC grants teams execute/edit/admin permissions on templates and inventories without exposing credentials.
- Surveys let non-technical users launch jobs through a controlled form with limited runtime variables.
- Schedules and notification templates automate recurring jobs and alert on success, failure, or approval states.
Practice what you learned
1. What is the relationship between AWX and Ansible Tower/AAP?
2. What does a job template bundle together?
3. What is a survey used for in Tower/AWX?
4. Why are credentials referenced rather than typed directly into playbooks in Tower/AWX?
5. What does a workflow template add on top of individual job templates?
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How Ansible reacts to task failures by default, and how block/rescue/always plus failed_when/changed_when give playbooks try/catch-like control over errors.
Idempotency in Ansible
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