added TimeMachine Support

README.md

 # samba
-samba - freshly complied from official stable releases on debian:jessie
+samba - freshly complied from official stable releases on debian:stretch
 
 # Source Code
 Check the following link for a new version: https://download.samba.org/pub/samba/stable/
@@ -25,6 +25,13 @@ to restrict access of volumes you can add the following to your samba volume con
 * __SAMBA\_CONF\_MAP_TO_GUEST__
     * default: _Bad User_
 
+* __SAMBA\_CONF\_ENABLE\_TIMEMACHINE__
+    * default not set - if set Apple's SMB2+ extension is enabled and timemachine support activated
+
+* __SAMBA\_CONF\_TIMEMACHINE\_MAX\_SIZE__
+    * default not set - if set it limits global disk size and preventing Time Machine from using the whole real disk space for backup
+    * format: `SIZE [K|M|G|T|P]`
+
 * __SAMBA\_CONF\_ENABLE\_PASSWORD\_SYNC__
     * default not set - if set password sync is enabled
 

docker-compose.yml

@@ -9,7 +9,7 @@ services:
       ACCOUNT_alice: alipass
       ACCOUNT_bob: bobpass
       SAMBA_VOLUME_CONFIG_aliceonly: "[Alice Share]; path=/shares/alice; valid users = alice; guest ok = no; read only = no; browseable = no"
-      SAMBA_VOLUME_CONFIG_bobstm: "[TimeCapsule Bob]; path=/shares/timemachine; valid users = bob; guest ok = no; read only = no; browseable = yes"
+      SAMBA_VOLUME_CONFIG_bobstm: "[TimeCapsule Bob]; path=/shares/timemachine; valid users = bob; guest ok = no; read only = no; browseable = yes; fruit:time machine = yes; fruit:time machine max size = 500G;"
     volumes:
       - ./shares/alice:/shares/alice
       - ./shares/timemachine:/shares/timemachine

scripts/entrypoint.sh

@@ -50,6 +50,28 @@ cat > /etc/smb.conf <<EOF
 
 EOF
 
+  ##
+  # Apple's SMB2+ extension timemachine support activated
+  ##
+  if [ ! -z ${SAMBA_CONF_ENABLE_TIMEMACHINE+x} ]
+  then
+    echo ">> SAMBA CONFIG: \$SAMBA_CONF_ENABLE_TIMEMACHINE is set, enabling Apple's SMB2+ & timemachine"
+cat >> /etc/smb.conf <<EOF
+   # Apple's SMB2+ & timemachine
+   fruit:aapl = yes
+   fruit:time machine = yes
+
+EOF
+    if [ ! -z ${SAMBA_CONF_TIMEMACHINE_MAX_SIZE+x} ]
+    then
+      echo ">> SAMBA CONFIG: \$SAMBA_CONF_TIMEMACHINE_MAX_SIZE is set to $SAMBA_CONF_TIMEMACHINE_MAX_SIZE"
+cat >> /etc/smb.conf <<EOF
+   fruit:time machine max size = $SAMBA_CONF_TIMEMACHINE_MAX_SIZE
+
+EOF
+    fi
+  fi
+
   ##
   # SAMBA Configuration (enable NTLMv1 passwords/auth)
   ##