Bug#804832: systemd-networkd fails to configure IPv4 Bridge Network

[Ritesh Raj Sarraf]

On Thu, 2015-11-12 at 10:02 -0300, Felipe Sateler wrote:
> I believe this is the problem. Because we do not enable iptables
> support in networkd, then it cannot set this flag.
> 
> I'd love to have iptables support enabled, but upstream wants to
> switch to nftables at some point. Switch costs are lower if there was
> never any support as there is nothing we can break.
> 
> However, I think networkd should emit a warning if a directive is not
> acted upon due to configure switches.
> 
> You could try enabling ip forwarding manually on the sysbr0 interface
> to see if that works.

I think this part, to an extent is taken care of. There were reports
upstream about it. And the messaging has been tuned accordingly.

root at deb-template:~# systemctl status systemd-networkd
● systemd-networkd.service - Network Service
   Loaded: loaded (/lib/systemd/system/systemd-networkd.service;
enabled; vendor preset: enabled)
   Active: active (running) since Sat 2015-11-14 15:28:29 IST; 38s ago
     Docs: man:systemd-networkd.service(8)
 Main PID: 281 (systemd-network)
   Status: "Processing requests..."
   CGroup: /machine.slice/systemd-nspawn at digikam.service/system.slice/s
ystemd-networkd.service
           └─281 /lib/systemd/systemd-networkd

Nov 14 15:28:28 deb-template systemd[1]: Stopped Network Service.
Nov 14 15:28:28 deb-template systemd[1]: Starting Network Service...
Nov 14 15:28:29 deb-template systemd-networkd[281]: host0: Cannot
configure IPv4 forwarding for interface host0: Read-only file system
Nov 14 15:28:29 deb-template systemd-networkd[281]: Enumeration
completed
Nov 14 15:28:29 deb-template systemd[1]: Started Network Service.
Nov 14 15:28:29 deb-template systemd-networkd[281]: host0: DHCPv4
address 172.16.221.159/16 via 172.16.20.1
Nov 14 15:28:35 deb-template systemd-networkd[281]: host0: Configured


The "cannot configure IPv4....." is now a warning message.

https://github.com/systemd/systemd/pull/495/files


-- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."

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