feat(httpapi): harden control plane and speed up prefix refresh

Очередь job получила lease и fencing, телеметрия и прогресс deploy сохраняются, ревизия пишет manifest входов. Обновление префиксов не переписывает неизменённый снимок, большие наборы идут через COPY, а устаревшая ревизия не попадает в deploy. Бандл ноды кэшируется, prune и постановка job больше не держат горячий путь.

Co-authored-by: Cursor <[email protected]>
This commit is contained in:
DenozordecandCursor committed 2026-11-02 17:23:59 +07:00
1 parent 924f111e48
commit f8e0520817
197 files changed
+18655 -1416

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+57
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#!/usr/bin/env bash
set -euo pipefail
# Build historical source, not today's implementation with a legacy DTO.
# Keep this commit pinned; a moved release tag must not silently change the gate.
case "${EVOBGP_LEGACY_VERSION:-2.56.2}" in
2.56.2) legacy_ref=924f111e4871e1d6d47c9916d7da1b9051718f1c ;;
1.0.0) legacy_ref=6ca34b900859665eede22044d734b698059bdf84 ;;
*) echo 'Unsupported legacy test version' >&2; exit 2 ;;
esac
if ! git cat-file -e "$legacy_ref^{commit}" 2>/dev/null; then
git fetch --no-tags --depth=1 origin "$legacy_ref"
fi
legacy_tmp="$(mktemp -d)"
trap 'rm -rf -- "$legacy_tmp"' EXIT
mkdir "$legacy_tmp/source"
archive_paths=(go.mod go.sum cmd/evobgp-node internal migrations)
if [ "${EVOBGP_LEGACY_VERSION:-2.56.2}" = 2.56.2 ]; then
archive_paths+=(cmd/evobgp-agent)
fi
git archive "$legacy_ref" "${archive_paths[@]}" |
tar -x -C "$legacy_tmp/source"
(
cd "$legacy_tmp/source"
go build -mod=readonly -o "$legacy_tmp/evobgp-node-legacy" ./cmd/evobgp-node
if [ "${EVOBGP_LEGACY_VERSION:-2.56.2}" = 2.56.2 ]; then
go build -mod=readonly -o "$legacy_tmp/evobgp-agent-legacy" ./cmd/evobgp-agent
fi
)
export EVOBGP_TEST_LEGACY_NODE_BIN="$legacy_tmp/evobgp-node-legacy"
go test -race -count=1 -json -run '^TestLegacyNodeBinaryCurrentControlPlane$' ./internal/httpapi |
tee "$legacy_tmp/result.jsonl"
assert_test() {
python3 - "$1" "$2" "$3" <<'PY'
import json
import sys
events = [json.loads(line) for line in open(sys.argv[1], encoding="utf-8")]
package, expected = sys.argv[2:4]
if any(e.get("Package") != package for e in events):
raise SystemExit("unexpected legacy compatibility package")
if any(e.get("Action") in ("skip", "fail") for e in events):
raise SystemExit("legacy compatibility test skipped or failed")
if not any(e.get("Test") == expected and e.get("Action") == "pass" for e in events):
raise SystemExit("required legacy binary compatibility test did not execute")
if not any("Test" not in e and e.get("Action") == "pass" for e in events):
raise SystemExit("legacy compatibility package did not pass")
print(f"Pinned legacy executable passed {expected}")
PY
}
assert_test "$legacy_tmp/result.jsonl" evobgp/internal/httpapi TestLegacyNodeBinaryCurrentControlPlane
if [ "${EVOBGP_LEGACY_VERSION:-2.56.2}" = 2.56.2 ]; then
export EVOBGP_TEST_LEGACY_AGENT_BIN="$legacy_tmp/evobgp-agent-legacy"
go test -race -count=1 -json -run '^TestLegacyAgentBinaryCurrentDispatch$' ./internal/nodedispatch |
tee "$legacy_tmp/agent-result.jsonl"
assert_test "$legacy_tmp/agent-result.jsonl" evobgp/internal/nodedispatch TestLegacyAgentBinaryCurrentDispatch
fi
+80
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#!/usr/bin/env bash
set -euo pipefail
: "${EVOBGP_TEST_DATABASE_URL:?PostgreSQL integration tests require EVOBGP_TEST_DATABASE_URL}"
assert_passes() {
local result_file="$1" package="$2" label="$3"
shift 3
python3 - "$result_file" "$package" "$label" "$@" <<'PY'
import json
import sys
path, package, label = sys.argv[1:4]
required = set(sys.argv[4:])
passed = set()
skipped = set()
failed = set()
package_passed = False
unexpected_packages = set()
with open(path, encoding="utf-8") as events:
for line in events:
event = json.loads(line)
if event.get("Package") != package:
unexpected_packages.add(event.get("Package", "<none>"))
continue
action = event.get("Action")
test = event.get("Test")
if action == "pass" and test:
passed.add(test)
elif action == "skip" and test:
skipped.add(test)
elif action == "fail":
failed.add(test or "<package>")
elif action == "pass" and not test:
package_passed = True
missing = required - passed
if failed or skipped or missing or unexpected_packages or not package_passed:
raise SystemExit(
f"{label}: required PostgreSQL tests did not pass: "
f"missing={sorted(missing)}, skipped={sorted(skipped)}, "
f"failed={sorted(failed)}, unexpected_packages={sorted(unexpected_packages)}, "
f"package_passed={package_passed}"
)
print(f"{label}: all {len(required)} required PostgreSQL integration tests passed, 0 skipped")
PY
}
db_result="$(mktemp)"
repo_result="$(mktemp)"
trap 'rm -f "$db_result" "$repo_result"' EXIT
# Run packages serially against the ephemeral database. Migration concurrency is
# exercised explicitly inside the isolated-schema DB tests.
go test -race -count=1 -p 1 -json -run '^TestPostgresMigration.*Integration$' ./internal/db | tee "$db_result"
assert_passes "$db_result" evobgp/internal/db 'DB migrations' \
TestPostgresMigrationsIntegration \
TestPostgresMigrationConcurrentApplyIntegration \
TestPostgresMigrationRollbackIntegration \
TestPostgresMigrationIdempotentIntegration \
TestPostgresMigrationLockCancellationIntegration
go test -race -count=1 -p 1 -json -run 'Integration$' ./internal/repository | tee "$repo_result"
assert_passes "$repo_result" evobgp/internal/repository 'Repository' \
TestPostgresPingIntegration \
TestPostgresModuleCRUDIntegration \
TestPostgresFirewallClientCreateAndGetIntegration \
TestEnsurePrefixSnapshotFillsEmptyExistingIntegration \
TestEnsurePrefixSnapshotIdempotentIntegration \
TestPostgresPruneUnreferencedPrefixSnapshotsIntegration \
TestPostgresEstimateRevisionPruneIntegration \
TestJobAuditClaimAndRestartIntegration \
TestJobAuditIdempotencyRowIntegration \
TestJobQueueRetryBoundsAndFailureIntegration \
TestJobQueueFreshSeedIntegration \
TestDeploymentLeaseGenerationAndRestartIntegration \
TestTelemetryLeaseSnapshotAndDiscoveryIntegration \
TestPostgresModuleSnapshotAtomicRMWMaxPoolOneIntegration \
TestPostgresModuleSnapshotAdvisoryWaitCancellationIntegration \
TestPostgresModuleSnapshotPartialWriteRollbackIntegration \
TestPostgresModuleSnapshotKilledBackendRollsBackIntegration \
TestPostgresModuleSnapshotMethodsRespectCancellationIntegration
+133
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# Read-only Docker snapshot. Never persist raw Compose config, inspect or stderr.
[CmdletBinding()]
param(
[string[]]$ComposeFile = @('deploy/compose/docker-compose.yaml'),
[string]$Profile = 'microvps-full',
[string]$ProjectName,
[string]$OutputPath,
[ValidateRange(1, 120)][int]$Samples = 1,
[ValidateRange(1, 60)][int]$IntervalSeconds = 15
)
$ErrorActionPreference = 'Stop'
$repoRoot = Split-Path $PSScriptRoot -Parent
if (-not $OutputPath) {
$OutputPath = Join-Path $repoRoot ('artifacts/backend-baseline/{0}.json' -f (Get-Date -Format 'yyyyMMdd-HHmmss-fff'))
}
$report = [ordered]@{
schema_version = 1
collected_at_utc = [DateTime]::UtcNow.ToString('o')
status = 'unavailable'
git_commit = $null
profile = $Profile
requested_samples = $Samples
interval_seconds = $IntervalSeconds
host = $null
configured_services = @()
containers = @()
samples = @()
issues = @()
limitations = @('Read-only point samples, not a workload benchmark or peak-memory measurement.',
'No raw environment, commands, labels, mounts, logs or Compose configuration is stored.',
'CPU/RAM/IO measurements require a reachable Docker daemon and running project containers.')
}
function Invoke-DockerJSON {
param([string[]]$DockerArgs, [switch]$JsonLines)
# Native errors may contain expanded secrets; expose only a fixed category.
$priorPreference = $ErrorActionPreference
$ErrorActionPreference = 'Continue'
try {
$raw = & docker @DockerArgs 2>$null
$code = $LASTEXITCODE
} finally { $ErrorActionPreference = $priorPreference }
if ($code -ne 0) { throw 'docker-command-failed' }
try {
if ($JsonLines) {
foreach ($line in $raw) { if ("$line".Trim()) { $line | ConvertFrom-Json } }
return
}
return (($raw -join "`n") | ConvertFrom-Json)
}
catch { throw 'docker-json-invalid' }
}
try {
if (Get-Command git -ErrorAction SilentlyContinue) {
$revision = & git -C $repoRoot rev-parse HEAD 2>$null
if ($LASTEXITCODE -eq 0) { $report.git_commit = "$revision".Trim() }
}
if (-not (Get-Command docker -ErrorAction SilentlyContinue)) { throw 'docker-cli-unavailable' }
$composeArgs = @('compose')
foreach ($file in $ComposeFile) {
$absolute = if ([IO.Path]::IsPathRooted($file)) { $file } else { Join-Path $repoRoot $file }
if (-not (Test-Path -LiteralPath $absolute -PathType Leaf)) { throw 'compose-file-unavailable' }
$composeArgs += @('-f', $absolute)
}
if ($Profile) { $composeArgs += @('--profile', $Profile) }
if ($ProjectName) { $composeArgs += @('--project-name', $ProjectName) }
# Config is parsed only in memory. Project metadata/environment are not copied.
$config = Invoke-DockerJSON -DockerArgs ($composeArgs + @('config', '--format', 'json'))
foreach ($service in $config.services.PSObject.Properties) {
$value = $service.Value
$report.configured_services += [ordered]@{
service = $service.Name
image = $value.image
profiles = @($value.profiles)
memory_limit = $value.deploy.resources.limits.memory
cpu_limit = $value.deploy.resources.limits.cpus
mem_limit = $value.mem_limit
cpus = $value.cpus
}
}
$config = $null
$report.host = Invoke-DockerJSON -DockerArgs @('info', '--format', '{"server_version":{{json .ServerVersion}},"os_type":{{json .OSType}},"architecture":{{json .Architecture}},"cpus":{{json .NCPU}},"memory_bytes":{{json .MemTotal}},"cgroup_version":{{json .CgroupVersion}}}')
$priorPreference = $ErrorActionPreference
$ErrorActionPreference = 'Continue'
try {
$containerIDs = @(& docker @composeArgs ps --all --quiet 2>$null)
$code = $LASTEXITCODE
} finally { $ErrorActionPreference = $priorPreference }
if ($code -ne 0) { throw 'compose-ps-failed' }
$containerIDs = @($containerIDs | Where-Object { $_ -match '^[a-f0-9]{12,64}$' })
if ($containerIDs.Count -eq 0) { $report.issues += 'no-project-containers' }
$runningIDs = @()
foreach ($id in $containerIDs) {
$container = Invoke-DockerJSON -DockerArgs @('inspect', '--format', '{"id":{{json .Id}},"image_id":{{json .Image}},"status":{{json .State.Status}},"running":{{json .State.Running}},"oom_killed":{{json .State.OOMKilled}},"restart_count":{{json .RestartCount}},"memory_limit_bytes":{{json .HostConfig.Memory}},"nano_cpus":{{json .HostConfig.NanoCpus}},"cpu_quota":{{json .HostConfig.CpuQuota}},"cpu_period":{{json .HostConfig.CpuPeriod}}}', $id)
$report.containers += $container
if ($container.running) { $runningIDs += $id }
}
$allSamplesComplete = $true
for ($i = 0; $i -lt $Samples -and $runningIDs.Count -gt 0; $i++) {
if ($i -gt 0) { Start-Sleep -Seconds $IntervalSeconds }
$stats = @(Invoke-DockerJSON -JsonLines -DockerArgs (@('stats', '--no-stream', '--format', '{"id":{{json .ID}},"cpu_percent":{{json .CPUPerc}},"memory_usage":{{json .MemUsage}},"memory_percent":{{json .MemPerc}},"network_io":{{json .NetIO}},"block_io":{{json .BlockIO}},"pids":{{json .PIDs}}}') + $runningIDs))
$missingIDs = @()
foreach ($expectedID in $runningIDs) {
$matches = @($stats | Where-Object {
$sampleID = [string]$_.id
$sampleID -match '^[a-f0-9]{12,64}$' -and $expectedID.StartsWith($sampleID)
})
if ($matches.Count -ne 1) { $missingIDs += $expectedID }
}
$complete = $missingIDs.Count -eq 0 -and $stats.Count -eq $runningIDs.Count
if (-not $complete) {
$allSamplesComplete = $false
$report.issues += 'incomplete-stats-sample'
}
$report.samples += [ordered]@{ observed_at_utc = [DateTime]::UtcNow.ToString('o'); complete = $complete; containers = $stats }
}
$report.status = if ($runningIDs.Count -gt 0 -and $allSamplesComplete) { 'collected' } else { 'partial' }
} catch {
# Do not expose arbitrary exception text, which may include native output.
$known = @('docker-cli-unavailable', 'compose-file-unavailable', 'docker-command-failed', 'docker-json-invalid', 'compose-ps-failed')
$reason = $_.Exception.Message
if ($reason -notin $known) { $reason = 'collection-failed' }
$report.issues += $reason
} finally {
$absoluteOutput = [IO.Path]::GetFullPath($OutputPath)
$parent = Split-Path $absoluteOutput -Parent
if (-not (Test-Path -LiteralPath $parent)) { New-Item -ItemType Directory -Path $parent -Force | Out-Null }
$report | ConvertTo-Json -Depth 12 | Set-Content -LiteralPath $absoluteOutput -Encoding UTF8
Write-Output ('Baseline status: {0}; report: {1}' -f $report.status, $absoluteOutput)
}
if ($report.status -ne 'collected') { exit 2 }
+15 -1
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@@ -2,11 +2,24 @@
$ErrorActionPreference = 'Stop'
Set-Location (Join-Path $PSScriptRoot '..')
$unfmt = gofmt -l . 2>$null
# Enumerate packages in this module instead of recursively formatting unrelated
# checkouts such as .claude/worktrees. Include tagged tests in each package dir.
$packageDirs = @(go list -f '{{.Dir}}' ./...)
if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
$unfmt = @(
foreach ($packageDir in ($packageDirs | Sort-Object -Unique)) {
$sourceFiles = @(Get-ChildItem -LiteralPath $packageDir -File -Filter '*.go' | Select-Object -ExpandProperty FullName)
if ($sourceFiles.Count -gt 0) {
gofmt -l @sourceFiles
if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
}
}
)
if ($unfmt) {
Write-Error "gofmt: unformatted files:`n$unfmt"
}
go vet ./...
if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
$golangci = Get-Command golangci-lint -ErrorAction SilentlyContinue
if (-not $golangci) {
$golangciPath = Join-Path $env:USERPROFILE 'go\bin\golangci-lint.exe'
@@ -14,6 +27,7 @@ if (-not $golangci) {
}
if ($golangci) {
& $golangci.Source run
if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
} else {
Write-Warning 'lint-go: golangci-lint not found, skipping (CI will run it)'
}
@@ -0,0 +1,46 @@
# Offline contract test: no Docker daemon or production access needed.
$ErrorActionPreference = 'Stop'
$repoRoot = Split-Path (Split-Path $PSScriptRoot -Parent) -Parent
$output = Join-Path $repoRoot 'artifacts/backend-baseline/offline-test.json'
$mockState = @{ Calls = [Collections.Generic.List[object]]::new(); EmptyStats = $false }
function docker {
param([Parameter(ValueFromRemainingArguments = $true)][string[]]$DockerArgs)
$mockState.Calls.Add($DockerArgs)
$global:LASTEXITCODE = 0
switch ($DockerArgs[0]) {
'compose' {
if ($DockerArgs -contains 'config') {
'{"services":{"api":{"image":"example/api:test","environment":{"PASSWORD":"MUST_NOT_LEAK"},"command":"MUST_NOT_LEAK","deploy":{"resources":{"limits":{"memory":"280M","cpus":"0.85"}}}}}}'
} else { 'aaaaaaaaaaaa'; 'bbbbbbbbbbbb' }
}
'info' { '{"server_version":"test","os_type":"linux","cpus":2,"memory_bytes":1073741824}' }
'inspect' {
'{"id":"' + $DockerArgs[-1] + '","image_id":"sha256:test","running":true,"memory_limit_bytes":293601280,"oom_killed":false,"restart_count":0}'
}
'stats' {
if ($mockState.EmptyStats) { return }
'{"id":"aaaaaaaaaaaa","cpu_percent":"1.0%","memory_usage":"20MiB / 280MiB"}'
'{"id":"bbbbbbbbbbbb","cpu_percent":"2.0%","memory_usage":"30MiB / 280MiB"}'
}
default { throw 'unexpected Docker operation' }
}
}
& (Join-Path $repoRoot 'scripts/collect-backend-baseline.ps1') -OutputPath $output -Samples 1
$raw = Get-Content -LiteralPath $output -Raw
$result = $raw | ConvertFrom-Json
if ($result.status -ne 'collected') { throw 'collector did not succeed' }
if ($result.containers.Count -ne 2 -or $result.samples[0].containers.Count -ne 2) { throw 'NDJSON multi-container stats were lost' }
if ($raw.Contains('MUST_NOT_LEAK') -or $raw.Contains('PASSWORD')) { throw 'raw Compose secrets leaked' }
if ($result.configured_services[0].memory_limit -ne '280M') { throw 'effective resource limit missing' }
if ($mockState.Calls.Count -eq 0) { throw 'Docker mock was not exercised' }
foreach ($call in $mockState.Calls) {
if ($call[0] -notin @('compose', 'info', 'inspect', 'stats')) { throw 'unexpected operation' }
if ($call[0] -eq 'compose' -and -not ($call -contains 'config' -or $call -contains 'ps')) { throw 'mutating Compose operation' }
}
$mockState.EmptyStats = $true
& (Join-Path $repoRoot 'scripts/collect-backend-baseline.ps1') -OutputPath $output -Samples 1
if ($LASTEXITCODE -ne 2) { throw 'missing stats must exit 2' }
$partial = Get-Content -LiteralPath $output -Raw | ConvertFrom-Json
if ($partial.status -ne 'partial' -or $partial.samples[0].complete -ne $false) { throw 'empty stats reported as complete' }
Write-Output 'PASS: multi-container snapshot, resource projection, secret exclusion, read-only operations, incomplete stats detection'
exit 0
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@@ -0,0 +1,145 @@
#!/usr/bin/env sh
# Offline behavioral checks for deploy/docker/mirror-base-images.sh.
set -eu
repo_root="$(CDPATH= cd -- "$(dirname -- "$0")/../.." && pwd)"
script="$repo_root/deploy/docker/mirror-base-images.sh"
test_dir="$(mktemp -d)"
case_env="$test_dir/mirror.env"
case_log="$test_dir/calls.log"
case_out="$test_dir/output.log"
copy_count_file="$test_dir/copy-count"
cleanup() {
rm -f "$test_dir/docker" "$test_dir/sleep" "$case_env" "$case_log" "$case_out" "$copy_count_file"
rmdir "$test_dir"
}
trap cleanup EXIT
cat > "$test_dir/docker" <<'EOF'
#!/usr/bin/env sh
set -eu
case "$1 $2 $3" in
'buildx imagetools inspect')
if [ "${4:-}" = '--format' ]; then
printf 'digest %s\n' "$6" >> "$CASE_LOG"
[ "$TEST_BAD_DIGEST" = 0 ] || exit 1
printf 'sha256:%s\n' 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
else
printf 'inspect %s\n' "$4" >> "$CASE_LOG"
[ "$TEST_EXISTING" = 1 ]
fi
;;
'buildx imagetools create')
n="$(cat "$COPY_COUNT_FILE")"
n="$((n + 1))"
printf '%s\n' "$n" > "$COPY_COUNT_FILE"
printf 'copy %s\n' "$8" >> "$CASE_LOG"
[ "$TEST_COPY_ALWAYS_FAIL" = 0 ] && [ "$n" -gt "$TEST_FAIL_FIRST" ]
;;
*)
printf 'unexpected docker call: %s\n' "$*" >&2
exit 2
;;
esac
EOF
cat > "$test_dir/sleep" <<'EOF'
#!/usr/bin/env sh
printf 'sleep %s\n' "$1" >> "$CASE_LOG"
EOF
chmod +x "$test_dir/docker" "$test_dir/sleep"
fail() {
printf 'FAIL: %s\n' "$1" >&2
cat "$case_out" >&2
exit 1
}
count_calls() {
awk -v kind="$1" '$1 == kind { count++ } END { print count + 0 }' "$case_log"
}
run_case() {
label="$1"
TEST_EXISTING="$2"
MIRROR_REFRESH="$3"
TEST_FAIL_FIRST="$4"
TEST_COPY_ALWAYS_FAIL="$5"
TEST_BAD_DIGEST="$6"
expected_status="$7"
export TEST_EXISTING MIRROR_REFRESH TEST_FAIL_FIRST TEST_COPY_ALWAYS_FAIL TEST_BAD_DIGEST
: > "$case_log"
printf '0\n' > "$copy_count_file"
rm -f "$case_env"
if REGISTRY=example.test/owner MIRROR_ENV_FILE="$case_env" MIRROR_RETRIES=2 \
CASE_LOG="$case_log" COPY_COUNT_FILE="$copy_count_file" PATH="$test_dir:$PATH" \
sh "$script" > "$case_out" 2>&1; then
status=0
else
status=$?
fi
if [ "$expected_status" = success ] && [ "$status" -ne 0 ]; then
fail "$label returned $status, expected success"
fi
if [ "$expected_status" = failure ] && [ "$status" -eq 0 ]; then
fail "$label succeeded, expected failure"
fi
}
assert_calls() {
kind="$1"
expected="$2"
actual="$(count_calls "$kind")"
[ "$actual" -eq "$expected" ] || fail "expected $expected $kind calls, got $actual"
}
assert_immutable_refs() {
[ -f "$case_env" ] || fail 'mirror env file missing'
lines="$(wc -l < "$case_env" | tr -d ' ')"
[ "$lines" -eq 6 ] || fail "expected 6 mirror refs, got $lines"
if grep -v -E '^BASE_[A-Z_]+=example\.test/owner/evobgp-buildcache@sha256:[a-f0-9]{64}$' "$case_env"; then
fail 'mirror env contains mutable or malformed image ref'
fi
}
run_case existing 1 0 0 0 0 success
assert_calls copy 0
assert_calls sleep 0
assert_immutable_refs
run_case new 0 0 0 0 0 success
assert_calls copy 6
assert_calls sleep 0
assert_immutable_refs
run_case retry 0 0 1 0 0 success
assert_calls copy 7
assert_calls sleep 1
assert_immutable_refs
run_case refresh 1 1 0 0 0 success
assert_calls copy 6
assert_calls sleep 0
assert_immutable_refs
run_case refresh_copy_failure 1 1 0 1 0 failure
assert_calls copy 2
assert_calls sleep 1
[ ! -f "$case_env" ] || fail 'failed refresh wrote mirror refs'
run_case refresh_digest_failure 1 1 0 0 1 failure
assert_calls copy 1
assert_calls sleep 0
[ ! -f "$case_env" ] || fail 'failed digest lookup wrote mirror refs'
run_case fallback 0 0 0 1 0 success
assert_calls copy 12
assert_calls sleep 6
[ ! -s "$case_env" ] || fail 'fallback wrote stale mirror refs'
run_case digest_fallback 1 0 0 0 1 success
assert_calls copy 0
assert_calls sleep 0
[ ! -s "$case_env" ] || fail 'digest fallback wrote mutable mirror refs'
printf 'mirror-base-images offline tests passed\n'