2/27/2024 0 Comments AutoMounter for mac instalDS_Store files on network volumes when using automounts. You will probably wish to disable the creation of. To go that next step, you’ll need to either use “Go to Folder” and specify “/groups/foo/images” or use the terminal and cd into that directory. If you look inside /groups/foo in the Finder or the Terminal, you will see an empty directory. For example, let’s say you want to get to /groups/foo/images. This is confusing for anyone who has not wrapped their head around autofs - and I’m staring in the general direction of most Mac users, here. A share will not actually mount until you traverse its mount point. This is an important concept to understand. If you look in the Finder, you should see that autmount has created the mount points, but nothing else. Now, even though it says “mounted”, nothing has actually been mounted. The first three lines are from Apple’s default mounts: When this command runs, it should output all the new mounts it has created. Now I need to restart the automounter so it sees the new mount maps: Looks pretty straightforward, right? After these modifications are in place, I check to make sure all files are root:wheel owned, the automounts directory has rwxr-xr-x (755) permissions and /etc/auto_master and all files within /etc/automounts have rw-r–r– (644) permissions. When all the mount files are written, I need to add one line per file to my /etc/auto_master file. These mount files can have any number of lines in them. You can, of course, specify each share individually. (The mount options are beyond the scope of this post, but go here if you want to learn more about them.) The other two mounts follow this same pattern. This saves me from having to specify each share individually. The asterisk at the beginning and the ampersand at the end of the line tell automount to mount any shares it finds inside /ifs/groups/foo with the same name as the share. Here’s what /etc/automounts/foo looks like: Because I’m working outside the user space, I’ll need root/admin privileges. To do this, I need to create three files inside a new /etc/automounts directory called foo, bar, and baz containing the respective automount maps. I want these shares to mount inside /groups/foo, /groups/bar, and /groups/baz. Each of these directories contains at least two subfolders which are the actual shares. Let’s say my Isilon cluster is called and it is exporting a number of NFS shares with root paths beginning with /ifs/groups/foo, /ifs/groups/bar, and /ifs/groups/baz. My solution (which works with OS 10.6 through 10.8) adds entries to /etc/auto_master that reference files in a new /etc/automounts directory. Because of a peculiarity in OS X Lion’s Finder ( that I’ll discuss later), this goal precluded the use of the automount maps that our linux hosts get from LDAP. My primary goals for this NFS automounting solution was to make it easy to manage and update - we sometimes add and remove fileshares - and to have the Macs mount fileshares at exactly the same paths as in Linux, inside a root-level directory called ‘groups’. Automount is clearly the best solution going forward. Simply by navigating to where the share is supposed to be will mount it there. Another benefit of autofs is that users no longer have to mount shares manually. Autofs will automatically mount fileshares on an as-needed basis and will automatically disconnect fileshares after an idle timeout period (which defaults to one hour). Fortunately, there’s a way around this that all our linux computers already use: autofs. At a certain point, this will become a problem. The more Macs we convert to LDAP/NFS, the more active connections we’ll have to our fileservers. Once a Mac user’s account has been migrated to LDAP, s/he can use NFS URLs in the Finder’s Connect to Server window and will see vastly superior performance to the previous SMB connections. Because our Mac users have mobile accounts with local homes, the move requires a bit of finagling, which is why Rich scripted the process. To remedy this, with the help of my colleague and Mac admin, Rich Trouton, we’ve started to migrate certain Mac users away from AD and SMB to LDAP and NFS. As the size of the scientific datasets people use grow, the (lack of) performance of SMB in Mac OS X becomes more of an issue - especially for people who know they can get far better performance in Windows and Linux. Our Macs bind to AD and therefore use SMB to access fileshares. The majority of our fileshares are located on Isilon gear and are accessible over SMB with AD authentication, and over NFS with LDAP authentication. I work in a mixed Mac/Windows/Linux environment.
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