fmcd crash-looped "Operation not permitted (os error 1)" on .116 (kernel
6.12.74): the default rootless seccomp profile blocks a syscall its Mainline-DHT
/ iroh transport needs, so the REST API never came up (:8178 → HTTP 000) and
federations couldn't be joined. Verified: with seccomp=unconfined fmcd boots and
answers /v2/* (HTTP 401 instead of dead). fmcd works on other nodes, so this is
kernel/seccomp-specific — but the relaxation is safe for an outbound-networking
daemon and harmless where not needed.
- new `security.seccomp_unconfined` manifest flag (SecurityPolicy);
- libpod backend sets `seccomp_profile_path: "unconfined"` (== --security-opt
seccomp=unconfined); quadlet backend emits `SeccompProfile=unconfined`;
- enabled in apps/fedimint-clientd/manifest.yml.
NOTE: manifests live on-disk at /opt/archipelago/apps/<id>/manifest.yml, so the
node needs the updated manifest deployed + the fmcd container recreated to apply.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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