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retry on failure #10

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Merged
joecorall merged 1 commit into from
Mar 8, 2026
Merged

retry on failure #10

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63 changes: 63 additions & 0 deletions main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -164,6 +164,11 @@ func main() {
os.Exit(0)
}

retryDelay := time.Second
const maxRetryDelay = time.Minute
retryAttempts := 0
const maxRetryAttempts = 10

for {
select {
case <-signalCh:
Expand All @@ -173,6 +178,23 @@ func main() {
request, err := newVaultRequest(http.MethodHead, vaultAddr+"/v1/sys/health", nil)
if err != nil {
log.Println(err)
if checkInterval < 0 {
retryAttempts++
if retryAttempts >= maxRetryAttempts {
log.Printf("Health check failed after %d attempts; exiting with failure", retryAttempts)
os.Exit(1)
}
log.Printf(
"Retrying health check in %s (exponential backoff), attempt %d/%d",
retryDelay, retryAttempts, maxRetryAttempts,
)
time.Sleep(retryDelay)
retryDelay *= 2
if retryDelay > maxRetryDelay {
retryDelay = maxRetryDelay
}
continue
}
time.Sleep(checkInterval)
continue
}
Expand All @@ -185,10 +207,51 @@ func main() {

if err != nil {
log.Println(err)
if checkInterval < 0 {
retryAttempts++
if retryAttempts >= maxRetryAttempts {
log.Printf("Health check failed after %d attempts; exiting with failure", retryAttempts)
os.Exit(1)
}
log.Printf(
"Retrying health check in %s (exponential backoff), attempt %d/%d",
retryDelay, retryAttempts, maxRetryAttempts,
)
time.Sleep(retryDelay)
retryDelay *= 2
if retryDelay > maxRetryDelay {
retryDelay = maxRetryDelay
}
continue
}
time.Sleep(checkInterval)
continue
}

if checkInterval < 0 && response.StatusCode >= http.StatusInternalServerError && response.StatusCode < 600 {
retryAttempts++
if retryAttempts >= maxRetryAttempts {
log.Printf(
"Vault health returned %d and failed after %d attempts; exiting with failure",
response.StatusCode, retryAttempts,
)
os.Exit(1)
}
log.Printf(
"Vault health returned %d. Retrying in %s (exponential backoff), attempt %d/%d",
response.StatusCode, retryDelay, retryAttempts, maxRetryAttempts,
)
time.Sleep(retryDelay)
retryDelay *= 2
if retryDelay > maxRetryDelay {
retryDelay = maxRetryDelay
}
continue
}

retryDelay = time.Second
retryAttempts = 0

switch response.StatusCode {
case 200:
log.Println("Vault is initialized and unsealed.")
Expand Down