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kevinveenbirkenbachandClaude Opus 5
7d9a63c98b
Both roles mount their model cache as a `type: bind` volume, and swarm
rejects a task whose bind source is missing on the node it lands on. Neither
declares a `placement`, so the scheduler may put the container on any node,
while the directory was created by a single task that reached one host. CI
showed the consequence directly:
s1_s1.1 desired=Ready current=Rejected error="invalid mount config for
type "bind": bind source path does not exist:
/var/cache/infinito/core/cache/models/s1"
with the creating task logging exactly one result line, for the manager.
`nfs_prep.yml` already fans directories out across the cluster but gates on
`driver_opts is defined`, which a bind volume never carries, so these two
volumes were never covered by it.
The host list moves into a `node_hosts` lookup rather than an inline
expression, because two roles already spelled the same idea by hand and a
third and fourth were about to. It answers one question - the hosts a
node-local path must exist on - and keeps the swarm group name in one place
per plugin. The call sites use `query()`, since `lookup()` joins several
results into one string and a loop needs the list.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
37 lines
1.1 KiB
Python
37 lines
1.1 KiB
Python
"""Every host a node-local path must exist on before a container binds it.
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Swarm rejects a task whose bind source is missing on the node it lands on, and
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a role that declares no ``placement`` may be scheduled onto any node, so the
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path has to exist on all of them. Without a swarm group there is one host, the
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one the task already runs on.
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"""
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from __future__ import annotations
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from typing import Any
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from ansible.plugins.lookup import LookupBase
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SWARM_GROUP = "svc-swarm-node"
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def node_hosts(vars_: dict[str, Any]) -> list[str]:
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"""Return every host a node-local path must exist on.
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Args:
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vars_: the task variables the lookup was called with.
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"""
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hosts = [str(host) for host in (vars_.get("groups") or {}).get(SWARM_GROUP) or []]
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return hosts or [str(vars_["inventory_hostname"])]
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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],
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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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vars_ = variables or getattr(self._templar, "available_variables", {}) or {}
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return node_hosts(vars_)
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