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kevinveenbirkenbachandClaude Opus 5
c55f508e05
The cosmos generator linked a consumer to its provider only through an '<role>' in group_names reference or an explicit provides: name. A hard dependency has neither -- pinning the provider on unconditionally is exactly what removes the Jinja reference the generator was reading -- so web-svc-asset's bond to web-svc-file vanished from the diagram the moment it became binding. Match a service key against the provider's own primary key from the registry, in both directions. Services the role turns off drew a solid 1:1 edge, claiming a mandatory relationship for something that carries nothing at deploy time. They now render as a red 0..0 edge; edge merging gained a real precedence so a provider consumed through two keys stays live when only one is off. Named colour, not hex: a '#' opens an entity code in the mermaid lexer and turns the whole diagram into a parse error on GitHub. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
41 lines
2.1 KiB
Markdown
41 lines
2.1 KiB
Markdown
# Webserver Health Check
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## Description
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This role verifies that each NGINX-served domain returns an expected HTTP status code (200, 301, etc.) and alerts on deviations.
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## Overview
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The role scans NGINX server block `.conf` files for domains, HEAD-requests each domain, compares the response against per-domain expected codes, and reports mismatches via `sys-ctl-alm-compose`. It is scheduled via a systemd timer for periodic health sweeps. Include this role and define `on_calendar_health_NGINX`. The role installs `requests` via `pip` automatically.
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## Cosmos
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The diagram places Webserver Health Check in the Infinito.Nexus cosmos: the components it deploys (capabilities), the central services it consumes (dependencies), and its outward reach (federation and bridged external networks).
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```mermaid
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flowchart LR
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subgraph role [sys-ctl-hlth-webserver 💻]
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svc_webserver["webserver"]
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end
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```
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Solid `1:1` edges are fixed relationships; dashed `0..1` edges are conditional (enabled only in matching deployments); red `0..0` edges are turned off in this role. Node markers show the role's deploy modes (💻 host, 🐳 compose, 🐝 swarm); ❌ marks a service that is explicitly turned off, and ⚙️ an Ansible role dependency declared in `meta/main.yml`.
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## Features
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- **Domain Detection:** Scans NGINX server block `.conf` files for configured domains.
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- **HTTP Status Verification:** HEAD-requests each domain and compares the response against per-domain expected codes.
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- **Alerting:** Reports mismatches via `sys-ctl-alm-compose`.
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- **Scheduled Execution:** Integrates with a systemd timer for periodic health sweeps.
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## Further Resources
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- [NGINX documentation](https://nginx.org/en/docs/)
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- [Ansible uri_module](https://docs.ansible.com/ansible/latest/modules/uri_module.html)
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## Credits
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Implemented by **[Kevin Veen-Birkenbach](https://www.veen.world)**.
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Part of the [Infinito.Nexus Project](https://s.infinito.nexus/code) and maintained by [Kevin Veen-Birkenbach](https://www.veen.world).
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Licensed under the [Infinito.Nexus Community License (Non-Commercial)](https://s.infinito.nexus/license).
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