_Time Machine backups via SMB.md

Time Machine backups via SMB

Cobbled together from https://www.reddit.com/r/homelab/comments/83vkaz/howto_make_time_machine_backups_on_a_samba/

1. Have at least Samba 4.8
2. create /etc/avahi/services/timemachine.service (see avahi.xml)
3. edit /etc/samba/smb.conf (see smb.conf)
   • I only added one path and one valid user, your choice

zfs create tank/backup/$USER/timemachine
zfs set quota=1T tank/backup/$USER/timemachine
systemctl restart avahi-daemon
systemctl restart smb

5. Go to your time machine config, it should be there!

avahi.xml

<?xml version="1.0" standalone='no'?>
<!--  /etc/avahi/services/timemachine.service -->
<!DOCTYPE service-group SYSTEM "avahi-service.dtd">
<service-group>
 <name replace-wildcards="yes">%h</name>
 <service>
   <type>_smb._tcp</type>
   <port>445</port>
 </service>
 <service>
   <type>_device-info._tcp</type>
   <port>0</port>
   <txt-record>model=RackMac</txt-record>
 </service>
 <service>
   <type>_adisk._tcp</type>
   <txt-record>sys=waMa=0,adVF=0x100</txt-record>
   <txt-record>dk0=adVN=TimeMachine Home,adVF=0x82</txt-record>
 </service>
</service-group>

smb.conf

# /etc/samba/smb.conf

[global]
#...

# Special configuration for Apple's Time Machine
fruit:model = MacPro
fruit:advertise_fullsync = true
fruit:aapl = yes

## Define your shares here
[TimeMachine Home]
path = /tank/backup/%U/timemachine/
valid users = %U
writable = yes
durable handles = yes
kernel oplocks = no
kernel share modes = no
posix locking = no
vfs objects = catia fruit streams_xattr
ea support = yes
browseable = yes
read only = No
inherit acls = yes
fruit:time machine = yes