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Add additional fingerprint error to check for when updating metadata (#221)
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@ -3,12 +3,14 @@ package google
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import (
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"fmt"
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"log"
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"strings"
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"google.golang.org/api/compute/v1"
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)
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const FINGERPRINT_RETRIES = 10
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const FINGERPRINT_FAIL = "Invalid fingerprint."
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var FINGERPRINT_FAIL_ERRORS = []string{"Invalid fingerprint.", "Supplied fingerprint does not match current metadata fingerprint."}
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// Since the google compute API uses optimistic locking, there is a chance
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// we need to resubmit our updated metadata. To do this, you need to provide
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@ -17,11 +19,25 @@ func MetadataRetryWrapper(update func() error) error {
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attempt := 0
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for attempt < FINGERPRINT_RETRIES {
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err := update()
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if err != nil && err.Error() == FINGERPRINT_FAIL {
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attempt++
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} else {
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if err == nil {
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return nil
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}
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// Check to see if the error matches any of our fingerprint-related failure messages
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var fingerprintError bool
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for _, msg := range FINGERPRINT_FAIL_ERRORS {
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if strings.Contains(err.Error(), msg) {
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fingerprintError = true
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break
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}
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}
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if !fingerprintError {
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// Something else went wrong, don't retry
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return err
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}
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attempt++
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}
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return fmt.Errorf("Failed to update metadata after %d retries", attempt)
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