Updated the NAT iptables patch for 4.19 buster
Depends on PR : Azure/sonic-linux-kernel#147
1 Known issue:
With both NAT patch files for 4.19 buster kernel, seeing 1 display issue in iptables like explained below
On Docker NAT, iptables supported version is 1.6.0 and on base OS it’s 1.8.2. So seeing an display issue of which fullcone option is not showing in version 1.8.2 iptables output and no issues in functionality.
Display issue – For example of comparsion:
NAT Docker:
root@sonic:/home/admin# docker exec -it nat bash
root@sonic:/# iptables -t nat -nvL
Chain PREROUTING (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 DNAT all -- * * 0.0.0.0/0 0.0.0.0/0 to:1.1.1.1 fullcone
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 30 packets, 2749 bytes)
pkts bytes target prot opt in out source destination
Chain POSTROUTING (policy ACCEPT 30 packets, 2749 bytes)
pkts bytes target prot opt in out source destination
root@sonic:/#
Base OS:
root@sonic:/home/admin# iptables-legacy -t nat -nvL
Chain PREROUTING (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
1 36 DNAT all -- * * 0.0.0.0/0 0.0.0.0/0 to:1.1.1.1
Chain INPUT (policy ACCEPT 1 packets, 36 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 41 packets, 3572 bytes)
pkts bytes target prot opt in out source destination
Chain POSTROUTING (policy ACCEPT 41 packets, 3572 bytes)
pkts bytes target prot opt in out source destination
root@sonic:/home/admin#
To fix this issue, iptables need to update from 1.6.0 to 1.8.2 version and have to update the NAT docker from stretch to buster. Will raise a new PR with this.
Signed-off-by: Akhilesh Samineni akhilesh.samineni@broadcom.com
Signed-off-by: Akhilesh Samineni <akhilesh.samineni@broadcom.com>
* Changes in sonic-buildimage for the NAT feature
- Docker for NAT
- installing the required tools iptables and conntrack for nat
Signed-off-by: kiran.kella@broadcom.com
* Add redis-tools dependencies in the docker nat compilation
* Addressed review comments
* add natsyncd to warm-boot finalizer list
* addressed review comments
* using swsscommon.DBConnector instead of swsssdk.SonicV2Connector
* Enable NAT application in docker-sonic-vs
