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Bug
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Resolution: Unresolved
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Undefined
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None
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4.18.0
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None
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False
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Description of problem:
When creating a MultiNetworkPolicy (MNP), it is respected. After editing it once - changes are respected. If the MNP is edited for the second time - changes are no longer respected.
Version-Release number of selected component (if applicable):
v4.18, might be seen in older versions, I didn't check.
Seen both on PSI and BM clusters.
$ oc get clusterversion
NAME VERSION AVAILABLE PROGRESSING SINCE STATUS
version 4.18.0-ec.3 True False 25h Cluster version is 4.18.0-ec.3
How reproducible:
Create a layer2 network, connect 2 pods to the network. Create a policy that affect that network and edit it several times.
Steps to Reproduce:
1. Create a ns:
oc create ns mnp-on-pods
2. Create:
- Layer2 network
- pod1-mnp
- pod2-mnp
- MNP affecting pod2-mnp
cat << EOF | oc create -f -
—
apiVersion: k8s.cni.cncf.io/v1
kind: NetworkAttachmentDefinition
metadata:
name: flat-l2-nad
namespace: mnp-on-pods
spec:
config: '
'
—
apiVersion: v1
kind: Pod
metadata:
name: pod1-mnp
namespace: mnp-on-pods
annotations:
k8s.v1.cni.cncf.io/networks: flat-l2-nad
spec:
containers:
- image: "quay.io/openshifttest/httpbin:1.2.2"
command: ["sleep", "3600"]
imagePullPolicy: IfNotPresent
name: alpine
securityContext:
allowPrivilegeEscalation: false
capabilities:
drop:
- ALL
securityContext:
fsGroup: 107
runAsNonRoot: true
runAsUser: 1000
seccompProfile:
type: RuntimeDefault
—
apiVersion: v1
kind: Pod
metadata:
name: pod2-mnp
namespace: mnp-on-pods
annotations:
k8s.v1.cni.cncf.io/networks: flat-l2-nad
spec:
containers:
- image: "quay.io/openshifttest/httpbin:1.2.2"
command: ["sleep", "3600"]
imagePullPolicy: IfNotPresent
name: alpine
securityContext:
allowPrivilegeEscalation: false
capabilities:
drop:
- ALL
securityContext:
fsGroup: 107
runAsNonRoot: true
runAsUser: 1000
seccompProfile:
type: RuntimeDefault
—
apiVersion: k8s.cni.cncf.io/v1beta1
kind: MultiNetworkPolicy
metadata:
annotations:
k8s.v1.cni.cncf.io/policy-for: mnp-on-pods/flat-l2-nad
name: pod2-ingress-mnp
namespace: mnp-on-pods
spec:
ingress:
- from:
- ipBlock:
cidr: 192.168.100.123/32
podSelector:
matchLabels:
pod: mnp-pod
policyTypes:
- Ingress
EOF
3. Ping from pod1 to pod 2 -> Should show no connectivity.
4. Keep the ping going in the pod and edit the MNP to allow ingress connectivity from pod1 IP address -> Ping gets replies successfully.
5. Edit the MNP again, to only allow incoming ingress from address 192.168.100.123/32.
Actual results:
Ping is partially successful - ping reply every 2 seconds instead of 1.
Expected results:
Ping should fail - should be no connectivity from pod1-mnp to pod2-mnp.
Additional info:
Please fill in the following template while reporting a bug and provide as much relevant information as possible. Doing so will give us the best chance to find a prompt resolution.
Affected Platforms:
Is it an
- internal RedHat testing failure
If it is an internal RedHat testing failure:
- Please share a kubeconfig or creds to a live cluster for the assignee to debug/troubleshoot along with reproducer steps (specially if it's a telco use case like ICNI, secondary bridges or BM+kubevirt).
If it is a CI failure:
- Did it happen in different CI lanes? If so please provide links to multiple failures with the same error instance
- Did it happen in both sdn and ovn jobs? If so please provide links to multiple failures with the same error instance
- Did it happen in other platforms (e.g. aws, azure, gcp, baremetal etc) ? If so please provide links to multiple failures with the same error instance
- When did the failure start happening? Please provide the UTC timestamp of the networking outage window from a sample failure run
- If it's a connectivity issue,
- What is the srcNode, srcIP and srcNamespace and srcPodName?
- What is the dstNode, dstIP and dstNamespace and dstPodName?
- What is the traffic path? (examples: pod2pod? pod2external?, pod2svc? pod2Node? etc)
If it is a customer / SD issue:
- Provide enough information in the bug description that Engineering doesn’t need to read the entire case history.
- Don’t presume that Engineering has access to Salesforce.
- Do presume that Engineering will access attachments through supportshell.
- Describe what each relevant attachment is intended to demonstrate (failed pods, log errors, OVS issues, etc).
- Referring to the attached must-gather, sosreport or other attachment, please provide the following details:
- If the issue is in a customer namespace then provide a namespace inspect.
- If it is a connectivity issue:
- What is the srcNode, srcNamespace, srcPodName and srcPodIP?
- What is the dstNode, dstNamespace, dstPodName and dstPodIP?
- What is the traffic path? (examples: pod2pod? pod2external?, pod2svc? pod2Node? etc)
- Please provide the UTC timestamp networking outage window from must-gather
- Please provide tcpdump pcaps taken during the outage filtered based on the above provided src/dst IPs
- If it is not a connectivity issue:
- Describe the steps taken so far to analyze the logs from networking components (cluster-network-operator, OVNK, SDN, openvswitch, ovs-configure etc) and the actual component where the issue was seen based on the attached must-gather. Please attach snippets of relevant logs around the window when problem has happened if any.
- When showing the results from commands, include the entire command in the output.
- For OCPBUGS in which the issue has been identified, label with “sbr-triaged”
- For OCPBUGS in which the issue has not been identified and needs Engineering help for root cause, label with “sbr-untriaged”
- Do not set the priority, that is owned by Engineering and will be set when the bug is evaluated
- Note: bugs that do not meet these minimum standards will be closed with label “SDN-Jira-template”
- For guidance on using this template please see
OCPBUGS Template Training for Networking components
