32-bit jail on 64-bit host

[Peter Blok]

I tried to replace some of the 32-bit binaries before, but it started to require shared libs as well, so I stopped. I’ll give it a shot later.

I now run it with out vnet and it indeed works. I have managed to compile p5-DBD-Oracle which works now.

Because all of my other jails were vnet jails, I didn’t think about doing it the old way without vnet.

Peter

> On 22 Apr 2021, at 15:39, Ian Lepore <ian at freebsd.org> wrote:
> 
> On Thu, 2021-04-22 at 12:32 +0200, Daniel Dettlaff via freebsd-hackers
> wrote:
>> If you need to run 32bit software with 64bit base system just try
>> creating 64bit jail with lib32 subsystem present. Then 32bit software
>> should be able to run properly in such jail, but you can't run 32bit
>> jail on 64bit base as Eugene said.
>> 
> 
> That is not what Eugene said, and you CAN run a 32-bit jail on a 64-bit 
> host; I do so on this machine.  As Eugene said, you simply need to copy
> a few selected 64-bit binaries into the jail, replacing the 32-bit
> version of those programs.  That is, install the jail from a 32-bit
> build or packages, and then just copy the necessary few binaries from
> your host root filesystem into the jail.
> 
> It would be nice if there was a list somewhere of which binaries need
> to be replaced.  I just did it by trial and error... when I ran into
> things that didn't work, I tried using a 64-bit copy of that program
> and if it worked: problem solved.
> 
> -- Ian
> 
>>> On 22 Apr 2021, at 10:36, Peter Blok <pblok at bsd4all.org> wrote:
>>> 
>>> Hi,
>>> 
>>> I have created a 32-bit jail on a 64-bit running 12-STABLE. The
>>> jail is also build using the same source.
>>> 
>>> The jail gives me a 32-bit environment. I’m getting an IP address
>>> and I can ping others on the same network segment.
>>> 
>>> But I can’t set a default route.
>>> 
>>> route add default 192.168.1.1
>>> route: writing to routing socket: Invalid argument
>>> add net default: gateway 192.168.1.1 fib 0: Invalid argument
>>> 
>>> # netstat -rn
>>> Routing tables
>>> (0) (0) UH 
>>> (0) (0) U 
>>> (0) (0) UHS 
>>> (0) (0) UH 
>>> (0) (0) U 
>>> (0) (0) UHS
>>> 
>>> # ifconfig -a
>>> lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
>>> 	options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
>>> 	inet6 ::1 prefixlen 128
>>> 	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
>>> 	inet 127.0.0.1 netmask 0xff000000
>>> 	groups: lo
>>> 	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
>>> e0b_websip: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST>
>>> metric 0 mtu 1500
>>> 	options=8<VLAN_MTU>
>>> 	ether 0e:88:d7:20:99:80
>>> 	hwaddr 02:80:ad:6e:79:0b
>>> 	inet 192.168.1.205 netmask 0xffffff00 broadcast 192.168.1.255
>>> 	groups: epair
>>> 	media: Ethernet 10Gbase-T (10Gbase-T <full-duplex>)
>>> 	status: active
>>> 	nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>>> 
>>> Any idea how to fix this?
>>> 
>>> I’m using vnet bridge
>>> 
>>> Peter
>>> 
>