Launching old version jail on newer version FreeBSD

E

Engraf

Hello,

I'm going to migrate our MTA (jailed Exim) to a new server. First off I've decided to perform all operations on a test machine. I inherited the old server and I'm still very much a newbie in FreeBSD. So, that's what I was doing:
  1. Old server:
    Code: 
    # uname -a
FreeBSD hostname.net 7.1-BETA FreeBSD 7.1-BETA #0: Sun Sep  7 13:49:18 UTC 2008     root@logan.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  i386
# df -H
Filesystem     Size    Used   Avail Capacity  Mounted on
/dev/da0s1a     10G    3.6G    5.9G    38%    /
devfs          1.0k    1.0k      0B   100%    /dev
/dev/da1s1d    232G    122G     92G    57%    /storage
/dev/da0s1e     62G     34G     23G    60%    /jail
/dev/da0s1d     21G    4.1k     19G     0%    /database
/dev/da0s1f     21G    4.1k     19G     0%    /reserved
devfs          1.0k    1.0k      0B   100%    /var/named/dev
devfs          1.0k    1.0k      0B   100%    /jail/main/dev
# dump -0aLu -f /storage/jail.dmp /jail
  2. New server:
    Code: 
    # uname -a
FreeBSD testBSD 10.0-RELEASE-p7 FreeBSD 10.0-RELEASE-p7 #0: Tue Jul  8 06:37:44 UTC 2014     root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  amd64
# df -h
Filesystem            Size    Used   Avail Capacity  Mounted on
zroot/ROOT/default     25G    3,2G     21G    13%    /
devfs                 1,0K    1,0K      0B   100%    /dev
zroot/jails/mail       52G     31G     21G    59%    /jails/mail
tempdisk               59G     29G     30G    49%    /tempdisk
zroot/tmp              21G    224K     21G     0%    /tmp
zroot/usr/home         21G    184K     21G     0%    /usr/home
zroot/usr/ports        22G    890M     21G     4%    /usr/ports
zroot/usr/src          22G    545M     21G     2%    /usr/src
zroot/var              22G    278M     21G     1%    /var
zroot/var/crash        21G    148K     21G     0%    /var/crash
zroot/var/log          21G    356K     21G     0%    /var/log
zroot/var/mail         21G    144K     21G     0%    /var/mail
zroot/var/tmp          21G    152K     21G     0%    /var/tmp
devfs                 1,0K    1,0K      0B   100%    /jails/mail/main/dev
devfs                 1,0K    1,0K      0B   100%    /jails/mail/main/dev
# pkg install compat7x
# restore -rf /tempdisk/jail.dmp
    rc.conf:
    Code: 
    hostname="testBSD"
keymap="ru.koi8-r.win.kbd"
ifconfig_em0="DHCP"
cloned_interfaces="lo123"
ifconfig_lo123_alias0="inet 10.1.2.3 netmask 255.255.255.255"
ifconfig_lo123_alias1="inet 10.4.5.6 netmask 255.255.255.255"
gateway_enable="YES"
sshd_enable="YES"
sshd_flags="-4 -u0"
openntpd_enable="YES"
powerd_enable="YES"
syslogd_flags="-ss"
sendmail_enable="NO"
zfs_enable="YES"
pf_enable="YES"
jail_enable="YES"
jail_list="test mail"
devfs_load_rulesets="YES"
dumpdev="NO"
    jail.conf:
    Code: 
    interface = "lo123";
ip6 = "disable";
allow.mount;
enforce_statfs = 1;
mount.devfs;
devfs_ruleset = 4;
#allow.mount.nullfs;
#allow.mount.procfs;
allow.mount.zfs;
allow.noset_hostname;
allow.sysvipc;
allow.raw_sockets;
#allow.chflags;
exec.start = "/bin/sh /etc/rc";
exec.stop = "/bin/sh /etc/rc.shutdown";
mail {
	path = "/jails/mail/main";
	ip4.addr = 10.4.5.6;
	host.hostname = "mail";
}
    pf.conf:
    Code: 
    ext_if="em0"
jail_if="lo123"
IP_PUB="192.168.x.x"
IP_JAIL_TEST="10.1.2.3"
IP_JAIL_MAIL="10.4.5.6"
NET_JAIL_TEST="10.1.2.0/24"
NET_JAIL_MAIL="10.4.5.0/24"
PORTS_TEST="{2221}"
PORTS_MAIL="{2222,80,443,25,587,465,143,993,110,995}"
scrub in all
nat pass on $ext_if from $NET_JAIL_TEST to any -> $IP_PUB
nat pass on $ext_if from $NET_JAIL_MAIL to any -> $IP_PUB
rdr pass on $ext_if proto tcp from any to $IP_PUB port $PORTS_TEST -> $IP_JAIL_TEST
rdr pass on $ext_if proto tcp from any to $IP_PUB port $PORTS_MAIL -> $IP_JAIL_MAIL
pass out
pass in
Jail starts successfully. Problem is when I connect to the jail using SSH (PuTTY), after logon I receive the following message:
Code: 
Server refused to allocate pty
Some forums suggest to execute /sbin/MAKEDEV tty && /sbin/MAKEDEV pty, but it says 'command not found'. What am I doing wrong? Or what have I missed?

Thanks.
 
The old pty(4) driver may be needed as well, it can be loaded on the fly with kldload pty. Put this in /boot/loader.conf to have to loaded on boot automatically

Code: 
pty_load="YES"
 
Engraf said:
Only compat7x is not enough?
Click to expand...
No, that's for running 7.x binaries on an 8.x system. So to complete the circle up to 10.x you need to install them all.
 
What a good feeling when everything starts to work as planned )

Thanks to all who responded. Go preparing to repeat on a real server.
 
Apologies for resurrecting an old thread, but I wanted to express my profuse thanks to kpa for the above pty driver suggestion. I had originally come looking for such a fix back in Nov 2014 after upgrading our FreeBSD 8.1 jail host running FreeBSD 6.1 & 8.1 jails to FreeBSD 10.1, whereupon, the FreeBSD 6.1 jails kept throwing the 'PTY allocation request failed on channel 0', but never found this post. A simple 'kldload pty' fixed it. FreeBSD 6.x /etc/defaults/devfs.rules doesn't have the "add path 'pts/*' unhide" lines, and adding them to it did nothing, but this above fix worked perfectly. Thank you again.
 
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