feat(vanity-gateway): configure mapping load timeout - #1151
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The gateway waits for MAPPING_PATH at startup and panics if the file does not appear within a hardcoded 15 seconds. Deployments where a ConfigMap projection or a config-producing sidecar materializes the file after the main container starts can exceed that budget, causing a restart on every rollout. Add an optional MAPPING_LOAD_TIMEOUT that overrides the initial wait. The 15 second default is unchanged when the variable is unset, and invalid or non-positive durations are rejected at startup. Closes #1149 Signed-off-by: Max Xing <mxing@nvidia.com>
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Included review availability: Your plan provides up to 12 included reviews per hour; 10 remain after this review. 📝 WalkthroughWalkthroughThe vanity gateway now accepts ChangesMapping-load timeout
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to The change adds an optional startup timeout override while preserving the existing 15-second default, with validation and tests covering the new behavior. No actionable merge-blocking risk remains beyond normal checks and review. Sequence Diagram(s)sequenceDiagram
participant Environment
participant NewNVCFGateway
participant SetupConfigWithConfigPathAndTimeout
participant reloadableconfig.SetupConfig
participant waitForFile
Environment->>NewNVCFGateway: provide MAPPING_LOAD_TIMEOUT
NewNVCFGateway->>SetupConfigWithConfigPathAndTimeout: pass mapping path and timeout
SetupConfigWithConfigPathAndTimeout->>reloadableconfig.SetupConfig: apply WithInitialLoadTimeout
reloadableconfig.SetupConfig->>waitForFile: wait using configured timeout or 15-second default
waitForFile-->>reloadableconfig.SetupConfig: configuration file or timeout error
reloadableconfig.SetupConfig-->>NewNVCFGateway: configuration result
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✅ Passed checks (3 passed)
Full details: Linked Issues checkExplanation The PR adds the requested MAPPING_LOAD_TIMEOUT configuration, preserves the 15-second default, supports duration decoding, and rejects negative values. However, issue
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Inline comments:
In `@src/invocation-plane-services/vanity-gateway/gateway/gateway.go`:
- Around line 117-119: Update the error return in the gateway configuration
loading flow after SetupConfigWithConfigPathAndTimeout to wrap err with the
requested “failed to load mapping configuration” context using fmt.Errorf and
%w, preserving the original error.
In `@src/invocation-plane-services/vanity-gateway/README.md`:
- Line 46: Update the MAPPING_LOAD_TIMEOUT documentation to state that the
duration must be greater than zero, including that zero and negative values are
rejected during gateway startup.
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src/invocation-plane-services/vanity-gateway/README.mdsrc/invocation-plane-services/vanity-gateway/gateway/gateway.gosrc/invocation-plane-services/vanity-gateway/gateway/gateway_test.gosrc/invocation-plane-services/vanity-gateway/gateway_config/gateway_config.gosrc/invocation-plane-services/vanity-gateway/internal/reloadableconfig/config.gosrc/invocation-plane-services/vanity-gateway/internal/reloadableconfig/config_test.go
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Address review feedback. Wrap the initial mapping configuration load failure so the startup error names the operation while preserving the original error, and document that MAPPING_LOAD_TIMEOUT must be greater than zero. Relates to #1149 Signed-off-by: Max Xing <mxing@nvidia.com>
Max-NV
enabled auto-merge
August 24, 2026 23:11
Type MAPPING_LOAD_TIMEOUT as time.Duration instead of parsing it by hand. Viper composes StringToTimeDurationHookFunc by default, so the conversion and the malformed-value error already happen during config decoding, and the manual parser only duplicated them. Only the negative check has to stay: a negative duration decodes cleanly but arms an already-expired timer, so the initial wait would fail immediately with a misleading timeout error. Extract registerConfigFlags so a test can exercise the real binding, and cover decoding of unset, valid, and unitless values. Relates to #1149 Signed-off-by: Max Xing <mxing@nvidia.com>
kristinapathak
approved these changes
Aug 25, 2026
The main package test now uses testify/require, which the binary does not import, so the go_test target under-declared it and Bazel strict dependency checking failed the build. Relates to #1149 Signed-off-by: Max Xing <mxing@nvidia.com>
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🎉 This PR is included in version nvcf-ai-api-gateway-service-v1.33.0 🎉 The release is available on GitHub release Your semantic-release bot 📦🚀 |
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TL;DR
Adds an optional
MAPPING_LOAD_TIMEOUTenvironment variable that overrides how long the gateway waits at startup for the file atMAPPING_PATH. The 15 second default is unchanged when the variable is unset.Additional Details
internal/reloadableconfigwaited on a hardcodeddefaultConfigLoadTimeout = 15 * time.Second, so operators could not adjust it. Deployments where a ConfigMap projection or a config-producing sidecar materializes the mapping file after the main container starts can exceed that budget, and the gateway exits withtimed out waiting for config to become available. The container then restarts and comes up healthy, which produces a guaranteed one-time restart per pod on every rollout.SetupConfigWithConfigPathis preserved as a thin wrapper over the newSetupConfigWithConfigPathAndTimeout, so existing callers are unaffected.WithInitialLoadTimeoutfunctional option;SetupConfigoverrides the default only when the value is positive.time.Durationongateway.Config. Viper composesStringToTimeDurationHookFuncby default, so a value without a unit is rejected while configuration is decoded and no hand-written parser is needed.For the Reviewer
Start with
gateway/gateway.goandinternal/reloadableconfig/config.go.registerConfigFlagsis extracted fromNewRootCommandinmain.gowith no behavior change, so a test can drive the real flag-and-environment binding instead of duplicating it.main.goalso loses a trailing blank line at end of file. It was already failinggofmtonmainfor that reason before this change.For QA
go test ./...insrc/invocation-plane-services/vanity-gatewaypasses.go vet ./...clean;gofmtclean on all changed files.Behavior with the variable unset is identical to today.
Issues
Closes #1149
Checklist
Summary by CodeRabbit
New Features
2mare now supported through configuration.Bug Fixes