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OCPEDGE-2381: Add test to verify for backup container exists when etcd crashes #30922

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OCPEDGE-2381: Add test to verify for backup container exists when etcd crashes #30922

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83 changes: 83 additions & 0 deletions test/extended/two_node/tnf_recovery.go
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@ import (
"fmt"
"math/rand"
"os"
"strings"
"time"

g "github.com/onsi/ginkgo/v2"
Expand Down Expand Up @@ -407,6 +408,88 @@ var _ = g.Describe("[sig-etcd][apigroup:config.openshift.io][OCPFeatureGate:Dual
&targetNode, true, false, // targetNode expected started == true, learner == false
6*time.Minute, 45*time.Second)
})

})

var _ = g.Describe("[sig-etcd][apigroup:config.openshift.io][Suite:openshift/two-node][Serial][Disruptive] Two Node with Fencing etcd recovery", func() {
defer g.GinkgoRecover()

var (
oc = exutil.NewCLIWithoutNamespace("").AsAdmin()
etcdClientFactory *helpers.EtcdClientFactoryImpl
peerNode, targetNode corev1.Node
)

g.BeforeEach(func() {
utils.SkipIfNotTopology(oc, v1.DualReplicaTopologyMode)

etcdClientFactory = helpers.NewEtcdClientFactory(oc.KubeClient())

utils.SkipIfClusterIsNotHealthy(oc, etcdClientFactory)

nodes, err := utils.GetNodes(oc, utils.AllNodes)
o.Expect(err).ShouldNot(o.HaveOccurred(), "Expected to retrieve nodes without error")

randomIndex := rand.Intn(len(nodes.Items))
peerNode = nodes.Items[randomIndex]
targetNode = nodes.Items[(randomIndex+1)%len(nodes.Items)]
})

g.It("should leave a backup container behind for debugging when etcd container crashes", func() {
survivedNode := peerNode

g.By("Recording epoch timestamp before reboot")
epochStr, err := exutil.DebugNodeRetryWithOptionsAndChroot(oc, targetNode.Name, "openshift-etcd",
"bash", "-c", "date +%s")
o.Expect(err).To(o.BeNil())
rebootEpoch := strings.TrimSpace(epochStr)

g.By(fmt.Sprintf("Removing /var/lib/etcd/pod.yaml on %s", targetNode.Name))
_, err = exutil.DebugNodeRetryWithOptionsAndChroot(oc, targetNode.Name, "openshift-etcd",
"bash", "-c", "rm -f /var/lib/etcd/pod.yaml")
o.Expect(err).To(o.BeNil(), "Expected to remove pod.yaml without error")

g.By(fmt.Sprintf("Rebooting %s ungracefully", targetNode.Name))
err = exutil.TriggerNodeRebootUngraceful(oc.KubeClient(), targetNode.Name)
o.Expect(err).To(o.BeNil(), "Expected to trigger ungraceful reboot without error")
time.Sleep(time.Minute)

g.By(fmt.Sprintf("Ensuring that %s added %s back as learner (timeout: %v)", survivedNode.Name, targetNode.Name, memberIsLeaderTimeout))
validateEtcdRecoveryState(oc, etcdClientFactory,
&survivedNode,
&targetNode, false, true,
memberIsLeaderTimeout, utils.FiveSecondPollInterval)

g.By(fmt.Sprintf("Ensuring %s rejoins as learner (timeout: %v)", targetNode.Name, memberRejoinedLearnerTimeout))
validateEtcdRecoveryState(oc, etcdClientFactory,
&survivedNode,
&targetNode, true, true,
memberRejoinedLearnerTimeout, utils.FiveSecondPollInterval)

g.By(fmt.Sprintf("Ensuring %s node is promoted back as voting member (timeout: %v)", targetNode.Name, memberPromotedVotingTimeout))
validateEtcdRecoveryState(oc, etcdClientFactory,
&survivedNode,
&targetNode, true, false,
memberPromotedVotingTimeout, utils.FiveSecondPollInterval)

g.By(fmt.Sprintf("Verifying etcd container is running on %s", targetNode.Name))
got, err := exutil.DebugNodeRetryWithOptionsAndChroot(oc, targetNode.Name, "openshift-etcd",
strings.Split(ensurePodmanEtcdContainerIsRunning, " ")...)
o.Expect(err).To(o.BeNil())
o.Expect(got).To(o.Equal("'true'"), fmt.Sprintf("expected etcd container running on %s", targetNode.Name))

g.By(fmt.Sprintf("Verifying etcd-previous container exists on %s", targetNode.Name))
prevOutput, err := exutil.DebugNodeRetryWithOptionsAndChroot(oc, targetNode.Name, "openshift-etcd",
"bash", "-c", "podman ps -a --format '{{.Names}}' | grep etcd-previous")
o.Expect(err).To(o.BeNil())
o.Expect(strings.TrimSpace(prevOutput)).To(o.Equal("etcd-previous"),
fmt.Sprintf("expected etcd-previous container on %s", targetNode.Name))

g.By(fmt.Sprintf("Verifying pod.yaml was recreated on %s via pacemaker log", targetNode.Name))
_, err = exutil.DebugNodeRetryWithOptionsAndChroot(oc, targetNode.Name, "openshift-etcd",
"bash", "-c", fmt.Sprintf("journalctl -u pacemaker --since=@%s --no-pager | grep -i 'a new working copy of /etc/kubernetes/static-pod-resources/etcd-certs/configmaps/external-etcd-pod/pod.yaml was created' | tail -1", rebootEpoch))
o.Expect(err).To(o.BeNil(), "Expected pacemaker log to contain pod.yaml recreation entry after reboot")
})
})

func validateEtcdRecoveryState(
Expand Down