Closes the remaining gap the previous two commits left open: WorkloadVerify
itself worked, but nothing minted a real token at allocation time or handed
it to a running pod, so it had no real caller yet.
agones.Client gains WorkloadSecret/WorkloadTokenTTL. When set, Allocate
mints a signed workload token for the allocation (allocation_id is known at
request-construction time, before Agones has picked a server -- see the
previous commit for why that's the only identifier the token can bind) and
requests it as a third cosmic-clash.io/workload-token annotation, alongside
the existing match-id/allocation-id ones. Left unset (the default), Allocate
requests no such annotation, so a deployment not yet using this path is
unaffected. cmd/allocator wires it from a new --workload-secret /
COSMIC_CLASH_WORKLOAD_SECRET flag (must match cmd/control-plane's own), with
a startup warning if left unset.
supervisor.Supervisor.workloadToken() resolves the bearer credential for
control-plane registration: an explicitly configured --workload-token-path
always wins (kept for a future Kubernetes-projected-JWT WorkloadVerify path,
not yet wired server-side), otherwise it falls back to the
cosmic-clash.io/workload-token annotation on the allocated GameServer --
the same annotation-fallback pattern matchID already used for
cosmic-clash.io/match-id. WorkloadTokenPath is accordingly no longer
required at construction time when ControlPlaneURL is set.
Verified: new agones test proves the annotation is requested (and parses/
verifies against the same secret, naming the right allocation) when
WorkloadSecret is configured, and that it's absent when it isn't; new
supervisor tests prove the annotation-sourced token is what's actually sent
as the Authorization bearer, and that Start fails closed with neither a
configured path nor an annotation present. Full
`go build ./... && go vet ./... && gofmt -l . && go test ./... -race` and
`go test -tags integration ./... -race` both clean.
Investigated the Fleet-manifest wiring task flagged last commit and
found a deeper, previously-undesigned gap: Kubernetes env vars are
fixed at pod creation, but Agones allocates a match to an already-
running Ready pod well after it starts -- so there was no channel at
all for match-specific data (match ID) to reach that pod's processes.
Close it using the Agones GameServerAllocation API's documented
spec.metadata.annotations field, which Agones applies to the allocated
GameServer's own object_meta on success: server/agones.Client.Allocate
now requests cosmic-clash.io/match-id and cosmic-clash.io/allocation-id
annotations, and the supervisor reads them back from the same
/gameserver SDK call it already makes for the assigned port/address
(GameServer.ObjectMeta.Annotations), falling back to them for its own
control-plane registration only when MatchID isn't explicitly
configured -- an explicit value always wins, and a match ID resolvable
from neither source fails Start() closed before any HTTP call.
The exact object_meta vs objectMeta JSON key from a live Agones SDK
sidecar is not independently verified from this sandbox; documented
inline, and the fallback degrades safely (empty annotations map, same
as before this change) if it turns out to be wrong.
Covered by two new tests: the annotation actually flowing through to
the registration body, and fail-closed with neither config nor
annotation supplying a match ID (registerCalled stays false, not just
that Start() errors).
Josh Creek