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derp: add some guardrails for derpReason metrics getting out of sync

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The derp metrics got out of sync in 74eb99aed1 (2023-03).

They were fixed in 0380cbc90d (2024-05).

This adds some further guardrails (atop the previous fix) to make sure
they don't get out of sync again.

Updates #12288

Change-Id: I809061a81f8ff92f45054d0253bc13871fc71634
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2024-05-31 08:06:14 -07:00
committed by Brad Fitzpatrick
parent 7e357e1636
commit f227083539
2 changed files with 27 additions and 11 deletions
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5
derp/dropreason_string.go
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@ -18,11 +18,12 @@ func _() {
_ = x[dropReasonQueueTail-4]
_ = x[dropReasonWriteError-5]
_ = x[dropReasonDupClient-6]
_ = x[numDropReasons-7]
}
const _dropReason_name = "UnknownDestUnknownDestOnFwdGoneDisconnectedQueueHeadQueueTailWriteErrorDupClient"
const _dropReason_name = "UnknownDestUnknownDestOnFwdGoneDisconnectedQueueHeadQueueTailWriteErrorDupClientnumDropReasons"
var _dropReason_index = [...]uint8{0, 11, 27, 43, 52, 61, 71, 80}
var _dropReason_index = [...]uint8{0, 11, 27, 43, 52, 61, 71, 80, 94}
func (i dropReason) String() string {
if i < 0 || i >= dropReason(len(_dropReason_index)-1) {