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kevinveenbirkenbachandClaude Opus 4.8
fc398084f9
Bare policies like no/off render as 'restart: no' which YAML parses as a boolean, so 'docker compose config' rejects the file. Quote the scalar ('restart: "no"') to keep it a string.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
71 lines
2.4 KiB
Python
71 lines
2.4 KiB
Python
"""Lookup `compose_restart`: emit `restart: <policy>` only in compose mode.
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In swarm mode the `restart:` top-level service key is silently ignored
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because swarm replaces it with `deploy.restart_policy` (rendered by
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`roles/sys-svc-container/templates/deploy.yml.j2`). Emitting `restart:`
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under swarm produces an "Ignoring unsupported options" warning at
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`docker stack deploy` time and double-declares the intent.
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Default call site:
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{{ lookup('compose_restart') }}
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resolves to the global `DOCKER_RESTART_POLICY` from
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`group_vars/all/00_general.yml`. That covers every caller whose intent
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is "use the operator-wide default policy".
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When a template needs a per-call override (either via Jinja-scope
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``{% set docker_restart_policy = '...' %}`` or a hardcoded literal),
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the caller passes the policy explicitly:
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{{ lookup('compose_restart', docker_restart_policy | default(DOCKER_RESTART_POLICY)) }}
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{{ lookup('compose_restart', 'on-failure') }}
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The override path lives at the caller because Jinja-scope `{% set %}`
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bindings are visible only in the rendering template, never in the
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Ansible variable context that the lookup sees.
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"""
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from __future__ import annotations
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import contextlib
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from typing import Any
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from ansible.errors import AnsibleError
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from ansible.plugins.lookup import LookupBase
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_DEFAULT_POLICY = "unless-stopped"
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class LookupModule(LookupBase):
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def run(
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self,
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terms: list[Any] | None,
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variables: dict[str, Any] | None = None,
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**kwargs: Any,
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) -> list[str]:
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if terms and len(terms) > 1:
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raise AnsibleError(
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"compose_restart lookup accepts at most one term: an explicit policy override"
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)
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vars_ = variables or getattr(self._templar, "available_variables", {}) or {}
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raw_mode = vars_.get("DEPLOYMENT_MODE", "compose")
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templar = getattr(self, "_templar", None)
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if templar is not None:
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with contextlib.suppress(Exception):
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raw_mode = templar.template(raw_mode)
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if str(raw_mode).strip() == "swarm":
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return [""]
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if terms:
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policy = terms[0]
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else:
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policy = vars_.get("DOCKER_RESTART_POLICY", _DEFAULT_POLICY)
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if templar is not None:
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with contextlib.suppress(Exception):
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policy = templar.template(policy)
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return [f'restart: "{policy}"']
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