Samba4 developer howto ---------------------- tridge@samba.org, December 2004 This is a very basic document on how to setup a simple Samba4 server. This is aimed at developers who are already familiar with Samba3 and wish to participate in Samba4 development. This is not aimed at production use of Samba4. Step 1: download Samba4 ----------------------- There are 2 methods of doing this: method 1: "rsync -avz samba.org::ftp/unpacked/samba4 ." method 2: "svn co svn://svnanon.samba.org/samba/branches/SAMBA_4_0 samba4" both methods will create a directory called "samba4" in the current directory. If you don't have rsync or svn then install one of them. Note that the above rsync command will give you a checked out svn repository. So if you also have svn you can update it to the latest version at some future date using: $ cd samba4 $ svn up Step 2: compile Samba4 ---------------------- Run this: $ cd samba4/source $ ./autogen.sh $ ./configure.developer -C $ make If you have gcc 3.4 or newer, then run "make pch" before "make" to greatly speed up the compile process (about 5x faster). Step 3: install Samba4 ---------------------- Run this as a user who have permission to write to the install directory (defaults to /usr/local/samba). Use --prefix option to configure above to change this. # make install Step 4: provision Samba4 ------------------------ The "provision" step sets up a basic user database. $ cd source $ ./setup/provision.pl --realm=YOUR.REALM --domain=YOURDOM --adminpass=SOMEPASSWORD This will create a number of new 'ldb' database files in a directory newdb.XXX. You need to move these to the "private" subdirectory of your install. For example: # mv newdb.123/*.ldb /usr/local/samba/private/ Step 5: Create a simple smb.conf -------------------------------- You need to create a smb.conf file in the lib/ directory of your install. The default is /usr/local/samba/lib/smb.conf. A minimal smb.conf would be: workgroup = YOURDOM [test] path = /data/test read only = no The workgroup must exactly match the --domain argument you gave to provision.pl Step 6: starting Samba4 ----------------------- The simplest is to just run "smbd", but as a developer you may find the following more useful: # smbd -i -M single -d3 that means "start smbd without messages in stdout, and running a single process, with level 3 debugging". That mode of operation makes debugging smbd with gdb particularly easy. Note that now it is no longer necessary to have an instance of nmbd from Samba 3 running. If you are running any smbd or nmbd processes they need to be stopped before starting smbd from Samba 4. Make sure you put the bin and sbin directories from your new install in your $PATH. Make sure you run the right version! Step 7: testing Samba4 ---------------------- try these commands: $ smbclient //localhost/test -Uadministrator%SOMEPASSWORD or $ ./script/tests/test_posix.sh //localhost/test administrator SOMEPASSWORD NOTE about filesystem support ----------------------------- To use the advanced features of Samba4 you need a filesystem that supports both the "user" and "system" xattr namespaces. If you run Linux with a 2.6 kernel and ext3 this means you need to include the option "user_xattr" in your /etc/fstab. For example: /dev/hda3 /home ext3 user_xattr 1 1 You also need to compile your kernel with the XATTR and SECURITY options for your filesystem. For ext3 that means you need: CONFIG_EXT3_FS_XATTR=y CONFIG_EXT3_FS_SECURITY=y If you are running a Linux 2.6 kernel with CONFIG_IKCONFIG_PROC defined you can check this with the following command: $ zgrep CONFIG_EXT3_FS /proc/config.gz If you don't have a filesystem with xattr support, then you can simulate it by using the option: posix:eadb = /usr/local/samba/eadb.tdb that will place all extra file attributes (NT ACLs, DOS EAs, streams etc), in that tdb. It is not efficient, and doesn't scale well, but at least it gives you a choice when you don't have a modern filesystem. Testing your filesystem ----------------------- To test your filesystem support, install the 'attr' package and run the following 4 commands as root: # touch test.txt # setfattr -n user.test -v test test.txt # setfattr -n security.test -v test2 test.txt # getfattr -d test.txt # getfattr -n security.test -d test.txt You should see output like this: # file: test.txt user.test="test" # file: test.txt security.test="test2" If you get any "Operation not supported" errors then it means your kernel is not configured correctly, or your filesystem is not mounted with the right options. If you get any "Operation not permitted" errors then it probably means you didn't try the test as root.