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kevinveenbirkenbachandClaude Fable 5
7d5775ff96
The ansible flavor deploys matrix as node-local compose even inside a swarm cluster, but compose_only stripped container_name and friends because DEPLOYMENT_MODE said swarm, so follow-up exec tasks could not find the containers. compose_mode_force pins the rendering to compose; the lookup honors it ahead of the cluster mode. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
64 lines
2.3 KiB
Python
64 lines
2.3 KiB
Python
"""Lookup `compose_only`: emit a `key: "<value>"` YAML pair only in
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compose mode; emit nothing under swarm.
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A single SPOT for every service-level YAML key that is structurally
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incompatible with `docker stack deploy` and must therefore be omitted
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when DEPLOYMENT_MODE == 'swarm'. Currently used for:
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* `container_name` — swarm rejects it alongside `deploy.replicas > 1`
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("can't set container_name and X as container name must be unique").
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* `pull_policy` — swarm rejects it as "Additional property pull_policy
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is not allowed" (compose-only extension).
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Both call sites look identical:
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{{ lookup('compose_only', 'container_name', MY_CONTAINER) }}
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{{ lookup('compose_only', 'pull_policy', 'never') }}
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The value is always double-quoted in the output. That makes the emit
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safe for YAML edge cases like `restart: no` (bare `no` would otherwise
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parse as a boolean) without burdening the caller with quoting rules.
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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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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 not terms or len(terms) != 2:
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raise AnsibleError(
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"compose_only lookup requires exactly two terms: the key and the value"
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)
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key = str(terms[0]).strip()
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value = str(terms[1])
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if not key:
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raise AnsibleError("compose_only lookup: key term must be non-empty")
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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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mode_force = vars_.get("compose_mode_force", "")
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if templar is not None:
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with contextlib.suppress(Exception):
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mode_force = templar.template(mode_force)
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effective_mode = str(mode_force or raw_mode).strip()
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if effective_mode == "swarm":
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return [""]
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return [f'{key}: "{value}"']
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