weizhouapache opened a new pull request, #6364:
URL: https://github.com/apache/cloudstack/pull/6364
The issue is found in the smoke test
`test/integration/smoke/test_network_ipv6.py`.
sometimes the test failed with error below
```
FAIL: Test to verify IPv6 network
----------------------------------------------------------------------
Traceback (most recent call last):
File
"/usr/local/lib/python3.6/site-packages/marvin/lib/decoratorGenerators.py",
line 30, in test_wrapper
return test(self, *args, **kwargs)
File "/marvin/test_network_ipv6.py", line 1215, in
test_01_verify_ipv6_network
self.checkNetworkRouting()
File "/marvin/test_network_ipv6.py", line 1060, in checkNetworkRouting
"Ping from VM %s of network %s to VM %s of network %s is unsuccessful" %
(self.routing_test_vm.id, self.routing_test_network.id,
self.virtual_machine.id, self.network.id))
AssertionError: False is not true : Ping from VM
0aa36a76-09c6-476f-97c5-b9cea27a5b7c of network
27a2b244-e319-46c5-a779-d6ae73eb9ac2 to VM ae13ea17-1f35-4ca7-83c1-e13126f8df79
of network 1f38a686-69f3-41ed-a75e-cd3f822497d8 is unsuccessful
```
After investigation, we found the egress traffic is dropped by `nft`.
a correct nft chain looks like
```
root@r-282-VM:~# nft list chain ip6 ip6_firewall fw_chain_egress
table ip6 ip6_firewall {
chain fw_chain_egress {
counter packets 0 bytes 0 accept
}
}
```
However, some VRs have the following nft chain
```
root@r-280-VM:~# nft list chain ip6 ip6_firewall fw_chain_egress
table ip6 ip6_firewall {
chain fw_chain_egress {
counter packets 0 bytes 0 drop
}
}
```
It is because the ingress rule does not have correct `default_egress_policy`
```
root@r-280-VM:~# cat /etc/cloudstack/ipv6firewallrules.json
{
"0": {
"already_added": false,
"default_egress_policy": true,
"dest_cidr_list": [],
"guest_ip6_cidr": "fd17:ac56:1234:1a96::/64",
"id": 0,
"protocol": "all",
"purpose": "Ipv6Firewall",
"revoked": false,
"source_cidr_list": [],
"src_ip": "",
"traffic_type": "Egress"
},
"1263": {
"already_added": false,
"default_egress_policy": false,
"dest_cidr_list": [
"::/0"
],
"guest_ip6_cidr": "fd17:ac56:1234:1a96::/64",
"icmp_code": -1,
"icmp_type": -1,
"id": 1263,
"protocol": "icmp",
"purpose": "Ipv6Firewall",
"revoked": false,
"source_cidr_list": [
"::/0"
],
"traffic_type": "Ingress"
},
"id": "ipv6firewallrules"
}
```
in mose time, the Egress rule is processed before Ingress rule.
But when the Ingress rule is processed at first, the nft chain will be wrong.
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