Frank
acf2a5cee5
The serve scripts and the deployer each hand-wrote the same missing/truncated artifact gates; the 2026-10-01 crash-loop was those twins disagreeing mid-cutover. scripts/lib/llm-gates.sh is the single place the refusal lives: require_file / require_bytes / require_min_mib / require_dir_files / require_image, each returning 1 and naming the endpoint, the artifact and the remedy. New seam tests/llm_gates.bats pins the contract at the arguments-in / status-and-stderr-out boundary.
96 lines
3.7 KiB
Bash
Executable File
96 lines
3.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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# llm-gates.sh — the artifact gates every LLM endpoint runs before it starts.
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#
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# Why this file exists: the fleet law from the 2026-10-01 crash-loop is that
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# a serve script and the deployer must refuse the SAME missing/truncated
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# artifact, the SAME way. When the two gates were hand-written twins they
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# drifted mid-cutover — green deploy, red unit, every time the payload moved.
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# Both sides source this library, so the refusal is one text and one rule.
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#
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# Contract (public interface):
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# require_file PATH LABEL HINT
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# require_bytes PATH LABEL WANT_BYTES HINT
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# require_min_mib PATH LABEL MIN_MIB HINT
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# require_dir_files DIR LABEL HINT FILE...
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# require_image REF HINT
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#
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# Each returns 0 and prints nothing on success. On failure it prints two
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# lines to stderr — the first naming the endpoint ($GATE_PREFIX) and the
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# artifact, the second the remedy — and returns 1. It NEVER exits: the serve
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# scripts run under `set -e` (so a refusal is terminal), while the deployer
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# wants `|| return 1` so a failed gate reports a red deploy for that one
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# service and the dispatcher's state marker stays pending.
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#
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# The size law is equality, not a floor, for `require_bytes`: a hub fetch
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# that truncates is the fleet's standing hazard (curl exits 0 on 401/403 and
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# writes the error body as the artifact), and the declared byte count is a
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# contract in both directions — a bigger file is a DIFFERENT artifact.
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# GATE_PREFIX names the endpoint in every refusal (e.g. frank-dragoon).
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: "${GATE_PREFIX:=gate}"
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_gate_fail() {
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printf '%s: %s\n' "$GATE_PREFIX" "$1" >&2
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printf ' hint: %s\n' "$2" >&2
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return 1
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}
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# require_file — PATH must be a regular file. A directory (an unpacked
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# staging dir wearing the payload's name) and a symlink (a HuggingFace cache
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# snapshot's entry, which dangles inside the container mount) both refuse.
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require_file() {
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local path="$1" label="$2" hint="$3"
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if [[ -L "$path" || ! -f "$path" ]]; then
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_gate_fail "$label: missing at $path" "$hint"
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fi
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}
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# require_bytes — PATH must exist AND be exactly WANT_BYTES bytes.
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require_bytes() {
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local path="$1" label="$2" want="$3" hint="$4" got
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require_file "$path" "$label" "$hint" || return 1
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got="$(stat -c %s "$path")"
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if [[ "$got" != "$want" ]]; then
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_gate_fail "$label: is $got bytes, expected $want" "$hint"
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fi
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}
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# require_min_mib — PATH must be at least MIN_MIB mebibytes. The floor form
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# is for build products (a .rad container is a range of legal sizes; a
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# truncated convert is not).
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require_min_mib() {
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local path="$1" label="$2" min="$3" hint="$4" mib
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require_file "$path" "$label" "$hint" || return 1
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mib=$(( $(stat -c %s "$path") / 1048576 ))
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if (( mib < min )); then
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_gate_fail "$label: is $mib MiB, expected >= $min MiB" "$hint"
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fi
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}
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# require_dir_files — DIR must be a directory and every named member a
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# regular file (the flat-tokenizer law: snapshot symlinks dangle in the
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# container mount even when the directory itself is real).
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require_dir_files() {
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local dir="$1" label="$2" hint="$3"
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shift 3
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local f
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if [[ ! -d "$dir" ]]; then
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_gate_fail "$label: missing at $dir" "$hint"
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fi
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for f in "$@"; do
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if [[ -L "$dir/$f" || ! -f "$dir/$f" ]]; then
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_gate_fail "$label: $dir/$f is missing or a symlink" "$hint"
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fi
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done
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}
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# require_image — the image ref must be in podman storage. A name@sha256 ref
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# exists only if THAT manifest was pulled, so the gate is the ref itself, in
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# one command: no pipefail/grep race (the 2026-09-30 lesson).
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require_image() {
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local ref="$1" hint="$2"
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if ! podman image exists "$ref"; then
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_gate_fail "image: $ref is not in podman storage" "$hint"
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fi
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}
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