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Update max_ejection_percent on outlier detection for peered clusters to 100% (#14373) 

We can't trust health checks on peered services when service resolvers,
splitters and routers are used.
This commit is contained in:
Eric Haberkorn 2022-08-29 13:46:41 -04:00 committed by GitHub
parent 680ff580a3
commit 13992d5dc8
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4 changed files with 16 additions and 6 deletions
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3
.changelog/14373.txt Normal file
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@ -0,0 +1,3 @@
```release-note:improvement
xds: Set `max_ejection_percent` on Envoy's outlier detection to 100% for peered services.
```

9
agent/xds/clusters.go
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@ -772,6 +772,13 @@ func (s *ResourceGenerator) makeUpstreamClusterForPeerService(
clusterName := generatePeeredClusterName(uid, tbs)
outlierDetection := ToOutlierDetection(cfg.PassiveHealthCheck)
// We can't rely on health checks for services on cluster peers because they
// don't take into account service resolvers, splitters and routers. Setting
// MaxEjectionPercent too 100% gives outlier detection the power to eject the
// entire cluster.
outlierDetection.MaxEjectionPercent = &wrappers.UInt32Value{Value: 100}
s.Logger.Trace("generating cluster for", "cluster", clusterName)
if c == nil {
c = &envoy_cluster_v3.Cluster{
@ -785,7 +792,7 @@ func (s *ResourceGenerator) makeUpstreamClusterForPeerService(
CircuitBreakers: &envoy_cluster_v3.CircuitBreakers{
Thresholds: makeThresholdsIfNeeded(cfg.Limits),
},
OutlierDetection: ToOutlierDetection(cfg.PassiveHealthCheck),
OutlierDetection: outlierDetection,
}
if cfg.Protocol == "http2" || cfg.Protocol == "grpc" {
if err := s.setHttp2ProtocolOptions(c); err != nil {

4
agent/xds/testdata/clusters/connect-proxy-with-peered-upstreams.latest.golden vendored
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@ -58,7 +58,7 @@
"dnsRefreshRate": "10s",
"dnsLookupFamily": "V4_ONLY",
"outlierDetection": {
"maxEjectionPercent": 100
},
"commonLbConfig": {
"healthyPanicThreshold": {
@ -115,7 +115,7 @@
},
"outlierDetection": {
"maxEjectionPercent": 100
},
"commonLbConfig": {
"healthyPanicThreshold": {

6
agent/xds/testdata/clusters/transparent-proxy-with-peered-upstreams.latest.golden vendored
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@ -18,7 +18,7 @@
},
"outlierDetection": {
"maxEjectionPercent": 100
},
"commonLbConfig": {
"healthyPanicThreshold": {
@ -75,7 +75,7 @@
},
"outlierDetection": {
"maxEjectionPercent": 100
},
"commonLbConfig": {
"healthyPanicThreshold": {
@ -157,7 +157,7 @@
},
"outlierDetection": {
"maxEjectionPercent": 100
},
"commonLbConfig": {
"healthyPanicThreshold": {