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kevinveenbirkenbachandClaude Opus 4.7
a0f0e3ac03
container_name is illegal in swarm mode when replicas > 1 (docker rejects
with "services.deploy.replicas: can't set container_name and X as container
name must be unique"). All compose.yml.j2 templates now route through a
single lookup that suppresses the key in swarm mode and emits it in compose
mode.
SPOT: plugins/lookup/compose_container_name.py
Reads DEPLOYMENT_MODE from the templating context, returns
'container_name: "<name>"' under compose and an empty string under swarm.
Call sites read:
{{ lookup('compose_container_name', MY_CONTAINER) }}
No explicit DEPLOYMENT_MODE pass-through needed.
Sweep: 82 templates rewritten across roles/web-app-*, roles/web-svc-*,
roles/svc-*, plus 4 partial includes (sso_proxy, redis, mariadb, postgres).
For container names assembled from multiple Jinja fragments the args use
tilde concat (X ~ '-' ~ Y) so the lookup receives a single resolved string
and the call stays a single well-formed Jinja expression.
Lint: tests/lint/ansible/jinja/test_no_raw_container_name.py blocks
(a) raw 'container_name:' YAML keys in any roles/*/templates/**/*.j2,
(b) split-Jinja regression where the outer braces close mid-call:
{{ lookup('compose_container_name', A }}-{{ B) }},
(c) embedded-Jinja regression inside a string argument:
lookup(..., "{{ X }}_suffix") (removed in ansible-core 2.23).
The (b) and (c) regexes accept either single- or double-quoted lookup
name and scan the full file so multi-line shapes also surface. Suppress
per-site with '# nocheck: container-name' on the same or preceding line.
Tests: tests/unit/plugins/lookup/test_compose_container_name.py pins the
lookup contract: compose vs swarm output, whitespace tolerance, default-to
compose when DEPLOYMENT_MODE is absent, AnsibleError on missing or excess
terms, non-string name coercion.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Ansible Plugins (plugins/) 🧩
This document is the central reference for plugin types and plugin placement in Infinito.Nexus.
Current Project Layout 🗂️
plugins/
├── action/ # custom action plugins
├── filter/ # custom Jinja2 filters
└── lookup/ # custom lookup plugins
Configured plugin paths in this repository are defined in ansible.cfg:
action_plugins = ./plugins/actionfilter_plugins = ./plugins/filterlookup_plugins = ./plugins/lookup
All Common Ansible Plugin Types 📚
The table below summarizes common Ansible plugin types and their conventional directory names.
| Emoji | Plugin Type | Conventional Directory | Purpose |
|---|---|---|---|
| ⚙️ | action |
action_plugins/ or plugins/action/ |
Wrap/extend module execution behavior at task runtime. |
| 🔐 | become |
become_plugins/ |
Implement privilege escalation methods. |
| 💾 | cache |
cache_plugins/ |
Persist gathered facts and cached data between runs. |
| 📣 | callback |
callback_plugins/ |
React to play/task events (logging, reporting, notifications). |
| 🖧 | cliconf |
cliconf_plugins/ |
Define CLI command transport behavior (mainly network platforms). |
| 🔌 | connection |
connection_plugins/ |
Control how Ansible connects to targets (ssh, local, etc.). |
| 🔍 | filter |
filter_plugins/ or plugins/filter/ |
Add Jinja2 filters for data transformation. |
| 🌐 | httpapi |
httpapi_plugins/ |
API transport layer over HTTP(S), mainly for network devices. |
| 🧭 | inventory |
inventory_plugins/ |
Build dynamic inventories from APIs, services, or files. |
| 👉 | lookup |
lookup_plugins/ or plugins/lookup/ |
Resolve dynamic values during playbook processing. |
| 🛰️ | netconf |
netconf_plugins/ |
NETCONF transport integration for network automation. |
| 🐚 | shell |
shell_plugins/ |
Adjust shell command wrapping/execution behavior. |
| 🧠 | strategy |
strategy_plugins/ |
Customize task scheduling/execution strategy. |
| ✅ | test |
test_plugins/ |
Add Jinja2 tests used in conditions and templates. |
| 📦 | vars |
vars_plugins/ |
Load variables from custom sources. |
Which Plugin Type to Use 🧭
action ⚙️
Use when task execution behavior itself must be changed or wrapped.
Examples:
- centralized retry logic (
uri_retry.py), - argument normalization before module dispatch,
- pre/post task orchestration.
filter 🔍
Use for pure data transformation in Jinja2 expressions.
Examples:
- mapping/normalizing dictionaries,
- deriving computed fields for templates,
- deterministic formatting helpers.
lookup 👉
Use when a value must be dynamically resolved at runtime.
Examples:
- computing IDs from role metadata,
- resolving paths/version data,
- reading structured project data for templates/tasks.
callback 📣
Use to hook into execution events and shape output/reporting.
inventory 🧭
Use when host/group data should come from a dynamic source.
strategy 🧠
Use to alter how tasks are scheduled/executed across hosts.
vars 📦
Use to load variables from custom backends.
connection, become, shell 🔌🔐🐚
Use to customize low-level execution and privilege mechanics.
cache 💾
Use to persist facts/results across runs for performance and consistency.
cliconf, httpapi, netconf 🖧🌐🛰️
Use in network automation contexts requiring protocol-specific transport behavior.
test ✅
Use to add custom Jinja2 test operators for conditional logic.
Best Practices 🧪
- Keep plugin interfaces explicit and stable.
- Keep plugin logic focused; move shared logic to
utils/. - Add unit tests for plugin behavior and integration tests for end-to-end flows.
- Prefer deterministic outputs and avoid hidden global state.
- Document any plugin-specific task arguments in the plugin docstring and README.
References 🔗
- Ansible plugin development: https://docs.ansible.com/ansible/latest/dev_guide/developing_plugins.html
- Ansible plugin index (all types): https://docs.ansible.com/ansible/latest/plugins/plugins.html
- Ansible
ansible-docplugin types:ansible-doc -t ...