Sanjeev N created CLOUDSTACK-5815:
-------------------------------------
Summary: [Hyper-v] Two SNAT rules for one isolated network if
acquired ip is from different vlan
Key: CLOUDSTACK-5815
URL: https://issues.apache.org/jira/browse/CLOUDSTACK-5815
Project: CloudStack
Issue Type: Bug
Security Level: Public (Anyone can view this level - this is the default.)
Components: Hypervisor Controller, Network Controller
Affects Versions: 4.3.0
Environment: Latest build from 4.3 branch with
commit:6f309b8a87d3376950a60234d399c6e3749ad1c7
Reporter: Sanjeev N
Fix For: 4.3.0
[Hyper-v] Two SNAT rules for one isolated network if acquired ip is from
different vlan
Steps to Reproduce:
=================
1.Bring up CS in advanced zone with hyper-v cluster
2.Create isolated guest network and deploy few vms in the network
3.Exhaust all the public IP addresses present in the zone (in user_ip_address
table set the allocated=now())
4.Add new public IP range in new vlan and new subnet
5.Acquire one ip address from the new ip range and configure PF and assign one
vm deployed at step2
Expected Result:
==============
In isolated network there is only one SNAT ip address for the entire network.
So even the acquired IP address is from different vlan, new SNAT rule should
not be configured with the acquired ip address.
Actual Result:
============
Since the ip address acquired at step5 is from new vlan and is the ip address
from that vlan additional SNAT rule got configured on VR with the acquired ip
address.
Following is the output from iptables on VR:
root@r-4-VM:~# iptables -t nat -L -nv
Chain PREROUTING (policy ACCEPT 279 packets, 28169 bytes)
pkts bytes target prot opt in out source destination
0 0 DNAT tcp -- eth2 * 0.0.0.0/0
10.147.31.240 tcp dpt:22 to:10.1.1.26:22
0 0 DNAT tcp -- eth0 * 0.0.0.0/0
10.147.31.240 tcp dpt:22 to:10.1.1.26:22
Chain INPUT (policy ACCEPT 4 packets, 240 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 4 packets, 304 bytes)
pkts bytes target prot opt in out source destination
0 0 DNAT tcp -- * * 0.0.0.0/0
10.147.31.240 tcp dpt:22 to:10.1.1.26:22
Chain POSTROUTING (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 SNAT tcp -- * eth0 10.1.1.0/24 10.1.1.26
tcp dpt:22 to:10.1.1.1
4 304 SNAT all -- * eth2 0.0.0.0/0 0.0.0.0/0
to:10.147.48.5
0 0 SNAT all -- * eth2 0.0.0.0/0 0.0.0.0/0
to:10.147.31.240
ip address configuration on eth2 as follows:
root@r-4-VM:~# ip addr show eth2
4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP
qlen 1000
link/ether 06:78:3c:00:00:17 brd ff:ff:ff:ff:ff:ff
inet 10.147.48.5/24 brd 10.147.48.255 scope global eth2
inet 10.147.31.240/24 brd 10.147.31.255 scope global eth2
inet6 fe80::478:3cff:fe00:17/64 scope link
valid_lft forever preferred_lft forever
Following is the IpAssocCmd got executed after configuring PF rule on the
acquired ip address:
2014-01-07 11:30:39,274 DEBUG [c.c.a.t.Request] (Job-Executor-31:ctx-26e587af
ctx-d423299a) Seq 4-2034961238: Sending { Cmd , MgmtId: 132129494109518, via:
4(10.147.40.31), Ver: v1, Flags: 100001,
[{"com.cloud.agent.api.routing.IpAssocCommand":{"ipAddresses":[{"accountId":2,"publicIp":"10.147.48.5","sourceNat":true,"add":true,"oneToOneNat":false,"firstIP":true,"broadcastUri":"vlan://48","vlanGateway":"10.147.48.1","vlanNetmask":"255.255.255.0","vifMacAddress":"06:88:76:00:00:17","networkRate":200,"trafficType":"Public"}],"accessDetails":{"router.guest.ip":"10.1.1.1","zone.network.type":"Advanced","router.ip":"10.147.40.230","router.name":"r-4-VM"},"wait":0}},{"com.cloud.agent.api.routing.IpAssocCommand":{"ipAddresses":[{"accountId":2,"publicIp":"10.147.31.240","sourceNat":true,"add":true,"oneToOneNat":false,"firstIP":true,"broadcastUri":"vlan://31","vlanGateway":"10.147.31.1","vlanNetmask":"255.255.255.0","vifMacAddress":"06:78:3e:00:00:17","networkRate":200,"trafficType":"Public"}],"accessDetails":{"router.guest.ip":"10.1.1.1","zone.network.type":"Advanced","router.ip":"10.147.40.230","router.name":"r-4-VM"},"wait":0}}]
}
2014-01-07 11:30:39,275 DEBUG [c.c.a.t.Request] (Job-Executor-31:ctx-26e587af
ctx-d423299a) Seq 4-2034961238: Executing: { Cmd , MgmtId: 132129494109518,
via: 4(10.147.40.31), Ver: v1, Flags: 100001,
[{"com.cloud.agent.api.routing.IpAssocCommand":{"ipAddresses":[{"accountId":2,"publicIp":"10.147.48.5","sourceNat":true,"add":true,"oneToOneNat":false,"firstIP":true,"broadcastUri":"vlan://48","vlanGateway":"10.147.48.1","vlanNetmask":"255.255.255.0","vifMacAddress":"06:88:76:00:00:17","networkRate":200,"trafficType":"Public"}],"accessDetails":{"router.guest.ip":"10.1.1.1","zone.network.type":"Advanced","router.ip":"10.147.40.230","router.name":"r-4-VM"},"wait":0}},{"com.cloud.agent.api.routing.IpAssocCommand":{"ipAddresses":[{"accountId":2,"publicIp":"10.147
31.240","sourceNat":true,"add":true,"oneToOneNat":false,"firstIP":true,"broadcastUri":"vlan://31","vlanGateway":"10.147.31.1","vlanNetmask":"255.255.255.0","vifMacAddress":"06:78:3e:00:00:17","networkRate":200,"trafficType":"Public"}],"accessDetails":{"router.guest.ip":"10.1.1.1","zone.network.type":"Advanced","router.ip":"10.147.40.230","router.name":"r-4-VM"},"wait":0}}]
}
In the above IpAssocCommand sourceNat is set to true even for the new acquired
ip address in the same netowrk.
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