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dhcp ipam: adjust retry mechanism

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Signed-off-by: SilverBut <SilverBut@users.noreply.github.com>
This commit is contained in:
SilverBut 2021-11-28 06:41:53 +08:00
parent 27fdec5cb9
commit c9d0423023
1 changed files with 9 additions and 4 deletions
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13
plugins/ipam/dhcp/lease.go
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@ -37,6 +37,11 @@ import (
const resendDelay0 = 4 * time.Second
const resendDelayMax = 62 * time.Second
// To speed up the retry for first few failures, we retry without
// backoff for a few times
const resendFastDelay = 2 * time.Second
const resendFastMax = 4
const (
leaseStateBound = iota
leaseStateRenewing
@ -427,8 +432,7 @@ func jitter(span time.Duration) time.Duration {
func backoffRetry(resendMax time.Duration, f func() (*dhcp4.Packet, error)) (*dhcp4.Packet, error) {
var baseDelay time.Duration = resendDelay0
var sleepTime time.Duration
var fastRetryLimit = 3 // fast retry for 3 times to speed up
var fastRetryLimit = resendFastMax
for {
pkt, err := f()
if err == nil {
@ -440,7 +444,7 @@ func backoffRetry(resendMax time.Duration, f func() (*dhcp4.Packet, error)) (*dh
if fastRetryLimit == 0 {
sleepTime = baseDelay + jitter(time.Second)
} else {
sleepTime = jitter(time.Second)
sleepTime = resendFastDelay + jitter(time.Second)
fastRetryLimit--
}
@ -448,7 +452,8 @@ func backoffRetry(resendMax time.Duration, f func() (*dhcp4.Packet, error)) (*dh
time.Sleep(sleepTime)
if baseDelay < resendMax {
// only adjust delay time if we are in normal backoff stage
if baseDelay < resendMax && fastRetryLimit == 0 {
baseDelay *= 2
} else {
break