SetupUnisonMediaFileSyncronization.txt

How to set-up Unison file sync on a VM as well as setting it so that rogue and tomcat7 users can both access geogit repo’s.


NOTE: Make a snapshot of the VM before attempting this!


1. First we make a group for Rogue and Tomcat7 users
	a. sudo groupadd roguecat

2. Add Rogue and Tomcat7 users to this group
	a. sudo usermod -a -G roguecat rogue
	b. sudo usermod -a -G roguecat tomcat7

3. Update apt-get packages
	a. sudo apt-get update

4. Install Unison
	a. sudo apt-get install unison

5. Install ACL to set-up default file permissions on creation
	a. sudo apt-get install acl

6. To activate acl modify the drive with the acl option
	a. sudo nano /etc/fstab
	b. add acl to the end of the / drive options
		1.  /               ext4    errors=remount-ro,acl 0       1

7. Just to be safe restart the vm and make sure it runs correctly
	a. sudo reboot

8. Now to set up default group and permissions on the folders we want
	a. Change permissions of parent directories
		i. 	cd /var/lib/
		ii. 	sudo chown tomcat7:roguecat geoserver_data/ geoserver_data/data_dir geoserver_data/data_dir/data/ geoserver_data/data_dir/data/geogit/ geoserver_data/data_dir/file-service-store
		iii. 	sudo chmod 775 geoserver_data/ geoserver_data/data_dir geoserver_data/data_dir/data/ geoserver_data/data_dir/data/geogit/ geoserver_data/data_dir/file-service-store
	b. Now to set it up so that any file or folder created inside of the directories has the roguecat group
		i. 	cd geoserver_data/data_dir/
		ii. 	sudo chmod g+s data/geogit file-service-store
	c. Now to set the default permissions of files or folders created inside of the directories
		i. 	sudo setfacl -d -m g::rwx data/geogit/
		ii. 	sudo setfacl -d -m o::rx data/geogit/
		iii. 	sudo setfacl -d -m g::rwx file-service-store/
		iv. 	sudo setfacl -d -m o::rx file-service-store/
	d. Now any files or folders created in those directories will have roguecat group and rwx permissions for group and rx permissions for other.
	e. If you had files and folders already in those directories before setting this up they won’t have everything set up correctly. To fix this perform these operations.
		i. 	sudo find data/geogit/ -type d -print0 | xargs -0 chmod 775
		ii. 	sudo find data/geogit/ -type f -print0 | xargs -0 chmod 664
		iii. 	sudo chown tomcat7:roguecat -R data/geogit/
		iv. 	sudo find data/geogit/ -type d -print0 | xargs -0 setfacl -d -m g::rwx
		v. 	sudo find data/geogit/ -type d -print0 | xargs -0 setfacl -d -m o::rx
		vi. 	sudo chown tomcat7:roguecat -R file-service-store/
		vii. 	cd file-service-store/
		viii. 	sudo chmod 664 *

9. Use Unison to sync a folder on a remote machine
	a. unison -batch /path/to/folder ssh://user@ip//path/to/folder


NOTE: Unison will carry over the permissions but not owner and group. So if you are syncing with a folder that has files without the correct permissions make sure to change the permissions once it has been copied over.