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OCPBUGS-29479: Add retries to async cache initialization #13610

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merged 5 commits into from
Feb 28, 2024
Merged

OCPBUGS-29479: Add retries to async cache initialization #13610

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975cee7
OCPBUGS-29479: Add retries to async cache initialization
TheRealJon Feb 15, 2024
6e153d8
Don't log errors on async cache retries.
TheRealJon Feb 15, 2024
1a23fc3
Use context.WithTimeout and wait.UntilWithContext instead of a for lo…
TheRealJon Feb 19, 2024
9761d5f
Use `wait.PollUntilContextTimeout` for async cache initialization
TheRealJon Feb 21, 2024
5f03015
Address review comments
TheRealJon Feb 22, 2024
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27 changes: 23 additions & 4 deletions pkg/auth/asynccache.go
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,12 @@ import (
"k8s.io/klog"
)

const (
initializationRetryInterval = 10 * time.Second
initializationTimeout = 5 * time.Minute
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@deads2k is this ok?

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@stlaz @deads2k The startupProbe for console pod lasts 5m, which also matches the duration console would retry auth config historically (4.14 and before).

initializeImmediately = true
)

type cachingFuncType[T any] func(ctx context.Context) (T, error)

type AsyncCache[T any] struct {
Expand All @@ -27,13 +33,26 @@ func NewAsyncCache[T any](ctx context.Context, reloadPeriod time.Duration, cachi
cachingFunc: cachingFunc,
}

item, err := cachingFunc(ctx)
var err error
wait.PollUntilContextTimeout(
ctx,
initializationRetryInterval,
initializationTimeout,
initializeImmediately,
func(ctx context.Context) (bool, error) {
item, err := cachingFunc(ctx)
if err != nil {
klog.V(4).Infof("failed to setup an async cache (retrying in %v) - caching func returned error: %v", initializationRetryInterval, err)
return false, nil
}
c.cachedItem = item
return true, nil
},
)

if err != nil {
return nil, fmt.Errorf("failed to setup an async cache - caching func returned error: %w", err)
}

c.cachedItem = item

return c, nil
}

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