Basics of Cert-Count Non-Locking Telemetry (#16676)
Basics of Cert-Count Telemetry, changelog, "best attempt" slice to capture (and test for) duplicates, Move sorting of possibleDoubleCountedRevokedSerials to after compare of entries. Add values to counter when still initializing. Set lists to nil after use, Fix atomic2 import, Delay reporting metrics until after deduplication has completed, The test works now, Move string slice to helper function; Add backendUUID to gauge name.
This commit is contained in:
Kit Haines
GitHub
parent
2e197fcfcd
commit
f2adbb3e47
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@ -3,11 +3,14 @@ package pki
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import (
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"context"
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"fmt"
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"sort"
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"strings"
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"sync"
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"sync/atomic"
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"time"
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atomic2 "go.uber.org/atomic"
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"github.com/hashicorp/vault/sdk/helper/consts"
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"github.com/armon/go-metrics"
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@ -203,6 +206,13 @@ func Backend(conf *logical.BackendConfig) *backend {
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// Delay the first tidy until after we've started up.
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b.lastTidy = time.Now()
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// Metrics initialization for count of certificates in storage
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b.certsCounted = atomic2.NewBool(false)
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b.certCount = new(uint32)
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b.revokedCertCount = new(uint32)
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b.possibleDoubleCountedSerials = make([]string, 0, 250)
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b.possibleDoubleCountedRevokedSerials = make([]string, 0, 250)
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return &b
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}
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@ -219,6 +229,12 @@ type backend struct {
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tidyStatus *tidyStatus
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lastTidy time.Time
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certCount *uint32
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revokedCertCount *uint32
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certsCounted *atomic2.Bool
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possibleDoubleCountedSerials []string
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possibleDoubleCountedRevokedSerials []string
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pkiStorageVersion atomic.Value
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crlBuilder *crlBuilder
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@ -330,6 +346,21 @@ func (b *backend) initialize(ctx context.Context, _ *logical.InitializationReque
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return err
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}
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err := b.initializePKIIssuersStorage(ctx)
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if err != nil {
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return err
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}
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// Initialize also needs to populate our certificate and revoked certificate count
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err = b.initializeStoredCertificateCounts(ctx)
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if err != nil {
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return err
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}
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return nil
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}
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func (b *backend) initializePKIIssuersStorage(ctx context.Context) error {
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// Grab the lock prior to the updating of the storage lock preventing us flipping
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// the storage flag midway through the request stream of other requests.
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b.issuersLock.Lock()
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@ -532,3 +563,160 @@ func (b *backend) periodicFunc(ctx context.Context, request *logical.Request) er
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// All good!
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return nil
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}
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func (b *backend) initializeStoredCertificateCounts(ctx context.Context) error {
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b.tidyStatusLock.RLock()
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defer b.tidyStatusLock.RUnlock()
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// For performance reasons, we can't lock on issuance/storage of certs until a list operation completes,
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// but we want to limit possible miscounts / double-counts to over-counting, so we take the tidy lock which
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// prevents (most) deletions - in particular we take a read lock (sufficient to block the write lock in
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// tidyStatusStart while allowing tidy to still acquire a read lock to report via its endpoint)
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entries, err := b.storage.List(ctx, "certs/")
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if err != nil {
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return err
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}
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atomic.AddUint32(b.certCount, uint32(len(entries)))
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revokedEntries, err := b.storage.List(ctx, "revoked/")
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if err != nil {
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return err
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}
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atomic.AddUint32(b.revokedCertCount, uint32(len(revokedEntries)))
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b.certsCounted.Store(true)
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// Now that the metrics are set, we can switch from appending newly-stored certificates to the possible double-count
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// list, and instead have them update the counter directly. We need to do this so that we are looking at a static
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// slice of possibly double counted serials. Note that certsCounted is computed before the storage operation, so
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// there may be some delay here.
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// Sort the listed-entries first, to accommodate that delay.
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sort.Slice(entries, func(i, j int) bool {
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return entries[i] < entries[j]
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})
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sort.Slice(revokedEntries, func(i, j int) bool {
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return revokedEntries[i] < revokedEntries[j]
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})
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// We assume here that these lists are now complete.
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sort.Slice(b.possibleDoubleCountedSerials, func(i, j int) bool {
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return b.possibleDoubleCountedSerials[i] < b.possibleDoubleCountedSerials[j]
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})
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listEntriesIndex := 0
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possibleDoubleCountIndex := 0
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for {
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if listEntriesIndex >= len(entries) {
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break
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}
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if possibleDoubleCountIndex >= len(b.possibleDoubleCountedSerials) {
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break
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}
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if entries[listEntriesIndex] == b.possibleDoubleCountedSerials[possibleDoubleCountIndex] {
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// This represents a double-counted entry
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b.decrementTotalCertificatesCountNoReport()
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listEntriesIndex = listEntriesIndex + 1
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possibleDoubleCountIndex = possibleDoubleCountIndex + 1
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continue
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}
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if entries[listEntriesIndex] < b.possibleDoubleCountedSerials[possibleDoubleCountIndex] {
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listEntriesIndex = listEntriesIndex + 1
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continue
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}
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if entries[listEntriesIndex] > b.possibleDoubleCountedSerials[possibleDoubleCountIndex] {
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possibleDoubleCountIndex = possibleDoubleCountIndex + 1
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continue
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}
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}
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sort.Slice(b.possibleDoubleCountedRevokedSerials, func(i, j int) bool {
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return b.possibleDoubleCountedRevokedSerials[i] < b.possibleDoubleCountedRevokedSerials[j]
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})
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listRevokedEntriesIndex := 0
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possibleRevokedDoubleCountIndex := 0
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for {
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if listRevokedEntriesIndex >= len(revokedEntries) {
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break
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}
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if possibleRevokedDoubleCountIndex >= len(b.possibleDoubleCountedRevokedSerials) {
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break
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}
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if revokedEntries[listRevokedEntriesIndex] == b.possibleDoubleCountedRevokedSerials[possibleRevokedDoubleCountIndex] {
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// This represents a double-counted revoked entry
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b.decrementTotalRevokedCertificatesCountNoReport()
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listRevokedEntriesIndex = listRevokedEntriesIndex + 1
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possibleRevokedDoubleCountIndex = possibleRevokedDoubleCountIndex + 1
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continue
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}
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if revokedEntries[listRevokedEntriesIndex] < b.possibleDoubleCountedRevokedSerials[possibleRevokedDoubleCountIndex] {
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listRevokedEntriesIndex = listRevokedEntriesIndex + 1
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continue
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}
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if revokedEntries[listRevokedEntriesIndex] > b.possibleDoubleCountedRevokedSerials[possibleRevokedDoubleCountIndex] {
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possibleRevokedDoubleCountIndex = possibleRevokedDoubleCountIndex + 1
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continue
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}
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}
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b.possibleDoubleCountedRevokedSerials = nil
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b.possibleDoubleCountedSerials = nil
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metrics.SetGauge([]string{"secrets", "pki", b.backendUUID, "total_certificates_stored"}, float32(*b.certCount))
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metrics.SetGauge([]string{"secrets", "pki", b.backendUUID, "total_revoked_certificates_stored"}, float32(*b.revokedCertCount))
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return nil
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}
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// The "certsCounted" boolean here should be loaded from the backend certsCounted before the corresponding storage call:
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// eg. certsCounted := b.certsCounted.Load()
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func (b *backend) incrementTotalCertificatesCount(certsCounted bool, newSerial string) {
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atomic.AddUint32(b.certCount, 1)
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switch {
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case !certsCounted:
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// This is unsafe, but a good best-attempt
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if strings.HasPrefix(newSerial, "certs/") {
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newSerial = newSerial[6:]
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}
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b.possibleDoubleCountedSerials = append(b.possibleDoubleCountedSerials, newSerial)
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default:
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metrics.SetGauge([]string{"secrets", "pki", b.backendUUID, "total_certificates_stored"}, float32(*b.certCount))
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}
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}
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func (b *backend) decrementTotalCertificatesCountReport() {
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b.decrementTotalCertificatesCountNoReport()
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metrics.SetGauge([]string{"secrets", "pki", b.backendUUID, "total_certificates_stored"}, float32(*b.certCount))
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}
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// Called directly only by the initialize function to deduplicate the count, when we don't have a full count yet
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func (b *backend) decrementTotalCertificatesCountNoReport() {
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atomic.AddUint32(b.certCount, ^uint32(0))
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}
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// The "certsCounted" boolean here should be loaded from the backend certsCounted before the corresponding storage call:
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// eg. certsCounted := b.certsCounted.Load()
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func (b *backend) incrementTotalRevokedCertificatesCount(certsCounted bool, newSerial string) {
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atomic.AddUint32(b.revokedCertCount, 1)
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switch {
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case !certsCounted:
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// This is unsafe, but a good best-attempt
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if strings.HasPrefix(newSerial, "revoked/") { // allow passing in the path (revoked/serial) OR the serial
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newSerial = newSerial[8:]
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}
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b.possibleDoubleCountedRevokedSerials = append(b.possibleDoubleCountedRevokedSerials, newSerial)
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default:
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metrics.SetGauge([]string{"secrets", "pki", b.backendUUID, "total_revoked_certificates_stored"}, float32(*b.revokedCertCount))
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}
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}
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func (b *backend) decrementTotalRevokedCertificatesCountReport() {
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b.decrementTotalRevokedCertificatesCountNoReport()
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metrics.SetGauge([]string{"secrets", "pki", b.backendUUID, "total_revoked_certificates_stored"}, float32(*b.revokedCertCount))
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}
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// Called directly only by the initialize function to deduplicate the count, when we don't have a full count yet
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func (b *backend) decrementTotalRevokedCertificatesCountNoReport() {
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atomic.AddUint32(b.revokedCertCount, ^uint32(0))
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}
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@ -27,6 +27,7 @@ import (
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"strconv"
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"strings"
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"sync"
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"sync/atomic"
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"testing"
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"time"
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@ -3456,7 +3457,7 @@ func TestBackend_AllowedDomainsTemplate(t *testing.T) {
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t.Fatal(err)
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}
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// Issue certificate for foobar.com to verify allowed_domain_templae doesnt break plain domains.
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// Issue certificate for foobar.com to verify allowed_domain_template doesn't break plain domains.
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_, err = client.Logical().Write("pki/issue/test", map[string]interface{}{"common_name": "foobar.com"})
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if err != nil {
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t.Fatal(err)
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@ -3731,7 +3732,10 @@ func TestBackend_RevokePlusTidy_Intermediate(t *testing.T) {
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metricsConf.EnableServiceLabel = false
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metricsConf.EnableTypePrefix = false
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metrics.NewGlobal(metricsConf, inmemSink)
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_, err := metrics.NewGlobal(metricsConf, inmemSink)
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if err != nil {
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t.Fatal(err)
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}
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// Enable PKI secret engine
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coreConfig := &vault.CoreConfig{
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@ -3748,8 +3752,6 @@ func TestBackend_RevokePlusTidy_Intermediate(t *testing.T) {
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vault.TestWaitActive(t, cores[0].Core)
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client := cores[0].Client
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var err error
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// Mount /pki as a root CA
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err = client.Sys().Mount("pki", &api.MountInput{
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Type: "pki",
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@ -3762,6 +3764,22 @@ func TestBackend_RevokePlusTidy_Intermediate(t *testing.T) {
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t.Fatal(err)
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}
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// Check the metrics initialized in order to calculate backendUUID for /pki
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// BackendUUID not consistent during tests with UUID from /sys/mounts/pki
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metricsSuffix := "total_certificates_stored"
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backendUUID := ""
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mostRecentInterval := inmemSink.Data()[len(inmemSink.Data())-1]
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for _, existingGauge := range mostRecentInterval.Gauges {
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if strings.HasSuffix(existingGauge.Name, metricsSuffix) {
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expandedGaugeName := existingGauge.Name
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backendUUID = strings.Split(expandedGaugeName, ".")[2]
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break
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}
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}
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if backendUUID == "" {
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t.Fatalf("No Gauge Found ending with %s", metricsSuffix)
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}
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// Set the cluster's certificate as the root CA in /pki
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pemBundleRootCA := string(cluster.CACertPEM) + string(cluster.CAKeyPEM)
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_, err = client.Logical().Write("pki/config/ca", map[string]interface{}{
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@ -3819,6 +3837,21 @@ func TestBackend_RevokePlusTidy_Intermediate(t *testing.T) {
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t.Fatal(err)
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}
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// Check the cert-count metrics
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expectedCertCountGaugeMetrics := map[string]float32{
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"secrets.pki." + backendUUID + ".total_revoked_certificates_stored": 1,
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"secrets.pki." + backendUUID + ".total_certificates_stored": 1,
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}
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mostRecentInterval = inmemSink.Data()[len(inmemSink.Data())-1]
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for gauge, value := range expectedCertCountGaugeMetrics {
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if _, ok := mostRecentInterval.Gauges[gauge]; !ok {
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t.Fatalf("Expected metrics to include a value for gauge %s", gauge)
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}
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if value != mostRecentInterval.Gauges[gauge].Value {
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t.Fatalf("Expected value metric %s to be %f but got %f", gauge, value, mostRecentInterval.Gauges[gauge].Value)
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}
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}
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// Revoke adds a fixed 2s buffer, so we sleep for a bit longer to ensure
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// the revocation time is past the current time.
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time.Sleep(3 * time.Second)
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@ -3886,6 +3919,8 @@ func TestBackend_RevokePlusTidy_Intermediate(t *testing.T) {
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"cert_store_deleted_count": json.Number("1"),
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"revoked_cert_deleted_count": json.Number("1"),
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"missing_issuer_cert_count": json.Number("0"),
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"current_cert_store_count": json.Number("0"),
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"current_revoked_cert_count": json.Number("0"),
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}
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// Let's copy the times from the response so that we can use deep.Equal()
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timeStarted, ok := tidyStatus.Data["time_started"]
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@ -3912,6 +3947,8 @@ func TestBackend_RevokePlusTidy_Intermediate(t *testing.T) {
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"secrets.pki.tidy.revoked_cert_current_entry": 0,
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"secrets.pki.tidy.revoked_cert_total_entries": 1,
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"secrets.pki.tidy.start_time_epoch": 0,
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"secrets.pki." + backendUUID + ".total_certificates_stored": 0,
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"secrets.pki." + backendUUID + ".total_revoked_certificates_stored": 0,
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"secrets.pki.tidy.cert_store_total_entries_remaining": 0,
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"secrets.pki.tidy.revoked_cert_total_entries_remaining": 0,
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}
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@ -3923,7 +3960,7 @@ func TestBackend_RevokePlusTidy_Intermediate(t *testing.T) {
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// Note that "secrets.pki.tidy.failure" won't be in the captured metrics
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}
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// If the metrics span mnore than one interval, skip the checks
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// If the metrics span more than one interval, skip the checks
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intervals := inmemSink.Data()
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if len(intervals) == 1 {
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interval := inmemSink.Data()[0]
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@ -5462,6 +5499,109 @@ func TestBackend_IfModifiedSinceHeaders(t *testing.T) {
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}
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}
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func TestBackend_InitializeCertificateCounts(t *testing.T) {
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t.Parallel()
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b, s := createBackendWithStorage(t)
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ctx := context.Background()
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// Set up an Issuer and Role
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// We need a root certificate to write/revoke certificates with
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resp, err := CBWrite(b, s, "root/generate/internal", map[string]interface{}{
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"common_name": "myvault.com",
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})
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if err != nil {
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t.Fatal(err)
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}
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if resp == nil {
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t.Fatal("expected ca info")
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}
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// Create a role
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_, err = CBWrite(b, s, "roles/example", map[string]interface{}{
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"allowed_domains": "myvault.com",
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"allow_bare_domains": true,
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"allow_subdomains": true,
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"max_ttl": "2h",
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})
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if err != nil {
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t.Fatal(err)
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}
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// Put certificates A, B, C, D, E in backend
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var certificates []string = []string{"a", "b", "c", "d", "e"}
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serials := make([]string, 5)
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for i, cn := range certificates {
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resp, err = CBWrite(b, s, "issue/example", map[string]interface{}{
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"common_name": cn + ".myvault.com",
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})
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if err != nil {
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t.Fatal(err)
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}
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serials[i] = resp.Data["serial_number"].(string)
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}
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// Revoke certificates A + B
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revocations := serials[0:2]
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for _, key := range revocations {
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resp, err = CBWrite(b, s, "revoke", map[string]interface{}{
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"serial_number": key,
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})
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if err != nil {
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t.Fatal(err)
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}
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}
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// Assert initialize from clean is correct:
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b.initializeStoredCertificateCounts(ctx)
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if *b.certCount != 6 {
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t.Fatalf("Failed to count six certificates root,A,B,C,D,E, instead counted %d certs", *b.certCount)
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}
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if *b.revokedCertCount != 2 {
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t.Fatalf("Failed to count two revoked certificates A+B, instead counted %d certs", *b.revokedCertCount)
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}
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// Simulates listing while initialize in progress, by "restarting it"
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atomic.StoreUint32(b.certCount, 0)
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atomic.StoreUint32(b.revokedCertCount, 0)
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b.certsCounted.Store(false)
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// Revoke certificates C, D
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dirtyRevocations := serials[2:4]
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for _, key := range dirtyRevocations {
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resp, err = CBWrite(b, s, "revoke", map[string]interface{}{
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"serial_number": key,
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})
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if err != nil {
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t.Fatal(err)
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}
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}
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// Put certificates F, G in the backend
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dirtyCertificates := []string{"f", "g"}
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for _, cn := range dirtyCertificates {
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resp, err = CBWrite(b, s, "issue/example", map[string]interface{}{
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"common_name": cn + ".myvault.com",
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})
|
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if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
}
|
||||
|
||||
// Run initialize
|
||||
b.initializeStoredCertificateCounts(ctx)
|
||||
|
||||
// Test certificate count
|
||||
if *(b.certCount) != 8 {
|
||||
t.Fatalf("Failed to initialize count of certificates root, A,B,C,D,E,F,G counted %d certs", *(b.certCount))
|
||||
}
|
||||
|
||||
if *(b.revokedCertCount) != 4 {
|
||||
t.Fatalf("Failed to count revoked certificates A,B,C,D counted %d certs", *(b.revokedCertCount))
|
||||
}
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
// Verify that our default values are consistent when creating an issuer and when we do an
|
||||
// empty POST update to it. This will hopefully identify if we have different default values
|
||||
// for fields across the two APIs.
|
||||
|
|
|
|||
|
|
@ -226,10 +226,18 @@ func fetchCertBySerial(ctx context.Context, b *backend, req *logical.Request, pr
|
|||
|
||||
// Update old-style paths to new-style paths
|
||||
certEntry.Key = path
|
||||
certsCounted := b.certsCounted.Load()
|
||||
if err = req.Storage.Put(ctx, certEntry); err != nil {
|
||||
return nil, errutil.InternalError{Err: fmt.Sprintf("error saving certificate with serial %s to new location", serial)}
|
||||
}
|
||||
if err = req.Storage.Delete(ctx, legacyPath); err != nil {
|
||||
// If we fail here, we have an extra (copy) of a cert in storage, add to metrics:
|
||||
switch {
|
||||
case strings.HasPrefix(prefix, "revoked/"):
|
||||
b.incrementTotalRevokedCertificatesCount(certsCounted, path)
|
||||
default:
|
||||
b.incrementTotalCertificatesCount(certsCounted, path)
|
||||
}
|
||||
return nil, errutil.InternalError{Err: fmt.Sprintf("error deleting certificate with serial %s from old location", serial)}
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -577,10 +577,12 @@ func revokeCert(ctx context.Context, b *backend, req *logical.Request, serial st
|
|||
return nil, fmt.Errorf("error creating revocation entry")
|
||||
}
|
||||
|
||||
certsCounted := b.certsCounted.Load()
|
||||
err = req.Storage.Put(ctx, revEntry)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("error saving revoked certificate to new location")
|
||||
}
|
||||
b.incrementTotalRevokedCertificatesCount(certsCounted, revEntry.Key)
|
||||
}
|
||||
|
||||
// Fetch the config and see if we need to rebuild the CRL. If we have
|
||||
|
|
|
|||
|
|
@ -409,13 +409,16 @@ func (b *backend) pathIssueSignCert(ctx context.Context, req *logical.Request, d
|
|||
}
|
||||
|
||||
if !role.NoStore {
|
||||
key := "certs/" + normalizeSerial(cb.SerialNumber)
|
||||
certsCounted := b.certsCounted.Load()
|
||||
err = req.Storage.Put(ctx, &logical.StorageEntry{
|
||||
Key: "certs/" + normalizeSerial(cb.SerialNumber),
|
||||
Key: key,
|
||||
Value: parsedBundle.CertificateBytes,
|
||||
})
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("unable to store certificate locally: %w", err)
|
||||
}
|
||||
b.incrementTotalCertificatesCount(certsCounted, key)
|
||||
}
|
||||
|
||||
if useCSR {
|
||||
|
|
|
|||
|
|
@ -257,13 +257,16 @@ func (b *backend) pathCAGenerateRoot(ctx context.Context, req *logical.Request,
|
|||
|
||||
// Also store it as just the certificate identified by serial number, so it
|
||||
// can be revoked
|
||||
key := "certs/" + normalizeSerial(cb.SerialNumber)
|
||||
certsCounted := b.certsCounted.Load()
|
||||
err = req.Storage.Put(ctx, &logical.StorageEntry{
|
||||
Key: "certs/" + normalizeSerial(cb.SerialNumber),
|
||||
Key: key,
|
||||
Value: parsedBundle.CertificateBytes,
|
||||
})
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("unable to store certificate locally: %w", err)
|
||||
}
|
||||
b.incrementTotalCertificatesCount(certsCounted, key)
|
||||
|
||||
// Build a fresh CRL
|
||||
err = b.crlBuilder.rebuild(ctx, b, req, true)
|
||||
|
|
@ -441,13 +444,16 @@ func (b *backend) pathIssuerSignIntermediate(ctx context.Context, req *logical.R
|
|||
return nil, fmt.Errorf("unsupported format argument: %s", format)
|
||||
}
|
||||
|
||||
key := "certs/" + normalizeSerial(cb.SerialNumber)
|
||||
certsCounted := b.certsCounted.Load()
|
||||
err = req.Storage.Put(ctx, &logical.StorageEntry{
|
||||
Key: "certs/" + normalizeSerial(cb.SerialNumber),
|
||||
Key: key,
|
||||
Value: parsedBundle.CertificateBytes,
|
||||
})
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("unable to store certificate locally: %w", err)
|
||||
}
|
||||
b.incrementTotalCertificatesCount(certsCounted, key)
|
||||
|
||||
if parsedBundle.Certificate.MaxPathLen == 0 {
|
||||
resp.AddWarning("Max path length of the signed certificate is zero. This certificate cannot be used to issue intermediate CA certificates.")
|
||||
|
|
|
|||
|
|
@ -493,6 +493,8 @@ func (b *backend) pathTidyStatusRead(_ context.Context, _ *logical.Request, _ *f
|
|||
"cert_store_deleted_count": nil,
|
||||
"revoked_cert_deleted_count": nil,
|
||||
"missing_issuer_cert_count": nil,
|
||||
"current_cert_store_count": nil,
|
||||
"current_revoked_cert_count": nil,
|
||||
},
|
||||
}
|
||||
|
||||
|
|
@ -531,6 +533,14 @@ func (b *backend) pathTidyStatusRead(_ context.Context, _ *logical.Request, _ *f
|
|||
resp.Data["time_finished"] = b.tidyStatus.timeFinished
|
||||
}
|
||||
|
||||
resp.Data["current_cert_store_count"] = b.certCount
|
||||
resp.Data["current_revoked_cert_count"] = b.revokedCertCount
|
||||
|
||||
if !b.certsCounted.Load() {
|
||||
resp.AddWarning("Certificates in storage are still being counted, current counts provided may be " +
|
||||
"inaccurate")
|
||||
}
|
||||
|
||||
return resp, nil
|
||||
}
|
||||
|
||||
|
|
@ -665,6 +675,8 @@ func (b *backend) tidyStatusIncCertStoreCount() {
|
|||
defer b.tidyStatusLock.Unlock()
|
||||
|
||||
b.tidyStatus.certStoreDeletedCount++
|
||||
|
||||
b.decrementTotalCertificatesCountReport()
|
||||
}
|
||||
|
||||
func (b *backend) tidyStatusIncRevokedCertCount() {
|
||||
|
|
@ -672,6 +684,8 @@ func (b *backend) tidyStatusIncRevokedCertCount() {
|
|||
defer b.tidyStatusLock.Unlock()
|
||||
|
||||
b.tidyStatus.revokedCertDeletedCount++
|
||||
|
||||
b.decrementTotalRevokedCertificatesCountReport()
|
||||
}
|
||||
|
||||
func (b *backend) tidyStatusIncMissingIssuerCertCount() {
|
||||
|
|
|
|||
|
|
@ -0,0 +1,3 @@
|
|||
```release-note:improvement
|
||||
secrets/pki: Added gauge metrics "secrets.pki.total_revoked_certificates_stored" and "secrets.pki.total_certificates_stored" to track the number of certificates in storage.
|
||||
```
|
||||
Loading…
Reference in New Issue