Details
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Bug
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Resolution: Done
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Undefined
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4.10
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None
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Moderate
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SDN Sprint 225, SDN Sprint 226, SDN Sprint 227
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3
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False
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Description
Description of problem:
intra namespace allow network policy doesn't work after applying ingress&egress deny all network policy
Version-Release number of selected component (if applicable):
OpenShift 4.10.12
How reproducible:
Always
Steps to Reproduce:
1. Define deny all network policy for egress an ingress in a namespace:
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: default-deny-all
spec:
podSelector: {}
policyTypes:
- Ingress
- Egress
2. Define the following network policy to allow the traffic between the pods in the namespace:
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: allow-intra-namespace-001
spec:
egress:
- to:
- podSelector: {}
ingress:
- from:
- podSelector: {}
podSelector: {}
policyTypes:
- Ingress
- Egress
3. Test the connectivity between two pods from the namespace.
Actual results:
The connectivity is not allowed
Expected results:
The connectivity should be allowed between pods from the same namespace.
Additional info:
After performing a test and analyzing SDN flows for the namespace:
sh-4.4# ovs-ofctl dump-flows -O OpenFlow13 br0 | grep --color 0x964376 cookie=0x0, duration=99375.342s, table=20, n_packets=14, n_bytes=588, priority=100,arp,in_port=21,arp_spa=10.128.2.20,arp_sha=00:00:0a:80:02:14/00:00:ff:ff:ff:ff actions=load:0x964376->NXM_NX_REG0[],goto_table:30 cookie=0x0, duration=1681.845s, table=20, n_packets=11, n_bytes=462, priority=100,arp,in_port=24,arp_spa=10.128.2.23,arp_sha=00:00:0a:80:02:17/00:00:ff:ff:ff:ff actions=load:0x964376->NXM_NX_REG0[],goto_table:30 cookie=0x0, duration=99375.342s, table=20, n_packets=135610, n_bytes=759239814, priority=100,ip,in_port=21,nw_src=10.128.2.20 actions=load:0x964376->NXM_NX_REG0[],goto_table:27 cookie=0x0, duration=1681.845s, table=20, n_packets=2006, n_bytes=12684967, priority=100,ip,in_port=24,nw_src=10.128.2.23 actions=load:0x964376->NXM_NX_REG0[],goto_table:27 cookie=0x0, duration=99375.342s, table=25, n_packets=0, n_bytes=0, priority=100,ip,nw_src=10.128.2.20 actions=load:0x964376->NXM_NX_REG0[],goto_table:27 cookie=0x0, duration=1681.845s, table=25, n_packets=0, n_bytes=0, priority=100,ip,nw_src=10.128.2.23 actions=load:0x964376->NXM_NX_REG0[],goto_table:27 cookie=0x0, duration=975.129s, table=27, n_packets=0, n_bytes=0, priority=150,reg0=0x964376,reg1=0x964376 actions=goto_table:30 cookie=0x0, duration=99375.342s, table=70, n_packets=145260, n_bytes=11722173, priority=100,ip,nw_dst=10.128.2.20 actions=load:0x964376->NXM_NX_REG1[],load:0x15->NXM_NX_REG2[],goto_table:80 cookie=0x0, duration=1681.845s, table=70, n_packets=2336, n_bytes=191079, priority=100,ip,nw_dst=10.128.2.23 actions=load:0x964376->NXM_NX_REG1[],load:0x18->NXM_NX_REG2[],goto_table:80 cookie=0x0, duration=975.129s, table=80, n_packets=0, n_bytes=0, priority=150,reg0=0x964376,reg1=0x964376 actions=output:NXM_NX_REG2[]
We see that the following rule doesn't match because `reg1` hasn't been defined:
cookie=0x0, duration=975.129s, table=27, n_packets=0, n_bytes=0, priority=150,reg0=0x964376,reg1=0x964376 actions=goto_table:30
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