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[release-4.17] OCPBUGS-42620: Include bootstrap IP in etcd endpoints list #1814

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[release-4.17] OCPBUGS-42620: Include bootstrap IP in etcd endpoints list #1814

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20 changes: 14 additions & 6 deletions pkg/operator/configobserver/etcd/observe_etcd_endpoints.go
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,8 @@ const (
etcdEndpointName = "etcd-endpoints"

// EtcdEndpointName points to the old host-etcd-2 endpoint applicable for clusters prior to 4.5
EtcdEndpointName = "host-etcd-2"
EtcdEndpointName = "host-etcd-2"
BootstrapIPAnnotationKey = "alpha.installer.openshift.io/etcd-bootstrap"
)

var (
Expand Down Expand Up @@ -94,12 +95,19 @@ func innerObserveStorageURLs(fallbackObserver fallBackObserverFn, alwaysAppendLo
return previouslyObservedConfig, append(errs, err)
}

// note: etcd bootstrap should never be added to the in-cluster kube-apiserver
// this can result in some early pods crashlooping, but ensures that we never contact the bootstrap machine from
// the in-cluster kube-apiserver so we can safely teardown out of order.

allEtcdEnpoints := []string{}
for k := range etcdEndpoints.Data {
address := etcdEndpoints.Data[k]
allEtcdEnpoints = append(allEtcdEnpoints, etcdEndpoints.Data[k])
}

// include etcd bootstrap IP in the list
// this ensures that all masters use it and their local etcd can be torn down / updated
// and this won't block revision rollout
if bootstrapIP, found := etcdEndpoints.GetAnnotations()[BootstrapIPAnnotationKey]; found {
allEtcdEnpoints = append(allEtcdEnpoints, bootstrapIP)
}

for _, address := range allEtcdEnpoints {
ip := net.ParseIP(address)
if ip == nil {
ipErr := fmt.Errorf("configmaps/%s in the %s namespace: %v is not a valid IP address", etcdEndpointName, EtcdEndpointNamespace, address)
Expand Down
4 changes: 2 additions & 2 deletions pkg/operator/configobserver/etcd/observe_etcd_endpoints_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -184,13 +184,13 @@ func TestInnerObserveStorageURLs(t *testing.T) {
expectErrors: true,
},
{
name: "IgnoreBootstrap",
name: "BootstrapIncluded",
currentConfigFor: observedConfigFor(withStorageURLFor("https://previous.url:2379")),
endpoint: endpoints(
withBootstrap("10.0.0.2"),
withAddress("10.0.0.1"),
),
expectedConfigFor: observedConfigFor(withStorageURLFor("https://10.0.0.1:2379")),
expectedConfigFor: observedConfigFor(withStorageURLFor("https://10.0.0.1:2379"), withStorageURLFor("https://10.0.0.2:2379")),
},
}
for _, tt := range tests {
Expand Down