[Casper] Self Service and Maintenance Tasks
Wade, Evan C.
ecwade at capousd.org
Mon Apr 6 14:31:57 PDT 2009
We've had some success operating outside of a strictly Casper way of
handling remote software updates in a wireless laptop environment.
I'm assuming that you're using an internal SUS to control which updates
are being offered to clients. Even still, we've had some bad
experiences with Apple laptops installing AirPort card driver updates
via wireless... it breaks the wireless configuration on the machine.
Apple even recommends against installing wireless updates wirelessly.
So, we set out to determine how to address self-initiated software
updates (and other routine maintenance tasks) and found that iHook in
conjunction with a set of complimentary JSS policies worked really well.
You can read all about how to use iHook and can download it from
http://rsug.itd.umich.edu/software/ihook so I won't go into a great
level of detail here. Here's how we implemented our fix:
1. Created the following folders with read-only access for standard
users: /Library/ITsupport, /Library/ITsupport/resource,
/Library/ITsupport/resource/graphics, /Library/ITsupport/resource/hooks,
/Library/ITsupport/resource/sound.
2. Placed the iHook app in the ITsupport folder, a teacher-friendly
attention getting sound in the sound folder, and a graphic that both
tells the end user that updates are needed and SHOWS them to connect
their laptop to wall power and a wired Ethernet drop before running Self
Service.
3. Created an iHook script that sets the iHook window to the same size
as the graphic, loads the graphic as the window background, and runs in
"Selfish" mode. This mode steals window focus and makes the menu and
Dock go away until the user clicks the "Cancel" button.
4. Created a Casper DMG install package of the above directory and its
contents, then pushed it out to all laptop systems.
5. Created a "nag" policy on the JSS that executes a shell script which
runs iHook with the associated iHook script on the remote client
machine. This means that once a month, the end-user's computer turns up
the volume, chimes, and displays the "Software Updates are needed"
reminder. The nag policy is scoped to laptop systems with one or more
software updates available, and the graphic displayed directs the end
user to launch Self-Service and click "Install" on the "Install software
updates" item.
6. The "Install software updates" item is a discrete policy scoped to
an "All wired systems" smart group. This ensures that wireless clients
not attached to an Ethernet drop will not see this as an available self
service item.
7. We made up a flyer and emailed it to end users that explained what
self-service maintenance was and why it was important.
It sounds complicated, but the end result is simple if you're an
end-user: once a month, you get a reminder that software updates are
needed (if in fact, they are), and you're directed on what to do to
install them. If you follow the directions that you're forced to
acknowledge on screen, you see the item in Self Service that triggers
software update.
Evan Wade
TIS Support Technician - 949-234-5500
Capistrano Unified School District
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Today's Topics:
1. Re: Software Update - laptop labs, progress indicator
(Clinton Blackmore)
2. Re: Software Update - laptop labs, progress indicator
(Miles Leacy)
3. Re: Can you tell if a computer is currently executing a
policy? (Ernst, Craig S.)
4. Suppress image mounting (Nichols, Jared)
5. Re: Software Update - laptop labs, progress indicator
(Clinton Blackmore)
6. Re: Software Update - laptop labs, progress indicator
(Ernst, Craig S.)
7. Re: Suppress image mounting (Thomas Larkin)
----------------------------------------------------------------------
Message: 1
Date: Thu, 2 Apr 2009 10:58:37 -0600
From: Clinton Blackmore <clinton.blackmore at westwind.ab.ca>
Subject: Re: [Casper] Software Update - laptop labs, progress
indicator
To: Miles Leacy <miles.leacy at themacadmin.com>
Cc: Casper List <casper at list.jamfsoftware.com>
Message-ID: <9D50E28F-E931-42D0-AFA3-A831C4DF4FDD at westwind.ab.ca>
Content-Type: text/plain; charset="us-ascii"
Ack. I meant "internal" SUSes, not "internet".
Clinton
On 2-Apr-09, at 10:40 AM, Miles Leacy wrote:
> On Thu, Apr 2, 2009 at 12:33 PM, Clinton Blackmore
<clinton.blackmore at westwind.ab.ca
> > wrote:
> In that case, how do you throttle it on the server side? We are
> using internet SUSes (although we really want to get a cascading SUS
> setup, so we can set on one server which updates need to go out, and
> which ones should be avoided.)
>
> By "internet SUSes" do you mean Apple's SUS(es)? How large and in
> how many disparate locations is your deployment? I ask, because a
> single SUS should suffice for most deployments up to a few hundred
> machines, provided you run your updates in off-hours and have a
> relatively fast network. Cascading SUSes are typically used when
> you have a large number of clients and/or have clients that are in
> multiple locations and you don't want your SUS traffic going over
> WAN links.
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Message: 2
Date: Thu, 2 Apr 2009 13:00:05 -0400
From: Miles Leacy <miles.leacy at themacadmin.com>
Subject: Re: [Casper] Software Update - laptop labs, progress
indicator
To: Jeff Strauss <jstrauss at loyolahs.edu>
Cc: Casper List <casper at list.jamfsoftware.com>
Message-ID:
<ec2e75ff0904021000o3395b160gd4e82f9ffb7a4b15 at mail.gmail.com>
Content-Type: text/plain; charset="windows-1252"
On Thu, Apr 2, 2009 at 12:40 PM, Jeff Strauss <jstrauss at loyolahs.edu>
wrote:
> Will bandwidth throttling via your own SUS carry through if Casper
> policies are applying updates?
>
Yes. Casper says "go to SUS 'X' and get all available updates". The
update
process is still governed by your SUS settings.
> I?m dealing with the same issue as Clinton; I have more than 500
laptops
> strewn throughout campus in carts, and they?re all using 54Mbps
wireless, so
> updating (and general connectivity) can sometimes be a pain. I was
thinking
> of deploying Self Service to all the machines and adding it as an
allowed
> application via WGM only to computer groups that I want to have
updated, so
> at least updates can be scattered and somewhat managed on a computer
group
> to computer group basis. I?d add a loginwindow message letting
students
> know there are updates available and to run Self Service when they log
in. I
> don?t know if that?s the best solution; I?m still wrestling with it in
my
> brain.
>
In general, and because one must cater to the least adept user, I leave
end
users out of management tasks. Self service is great for things that
the
user wants, such as an application, a peripheral driver or a printer,
but
for items that the end user cannot see any tangible benefit to, they're
a
lot less likely to actually run the self-service policy.
I'd suggest that if waking a machine with the lid closed turns out to be
a
dead end, to find a room that you can be sure will be and remain locked
on
weekends (preferably a room with lots of table/desk space and power).
As an
end of week procedure, plug in and open up your laptops in this room.
Get a
student volunteer(s) to help you if you can.
> Otherwise, you could set updates to run at startup or via the ?any?
> trigger, but my experience with that has been mixed. I?ve tried to run
> updates at startup and users will get upset that it takes forever to
log on,
> and I?ve tried it at ?any,? which seemed to work better, but can still
> impact performance and the user will get weary if they don?t know
they?re
> receiving an update. I think my experience also has to do with the
fact that
> all the machines are wireless, and connectivity becomes heavily
impacted
> when there are more than a few dozen machines pulling down large files
from
> the server simultaneously.
>
Laptops can be a bit of a pain for routine maintenance since you can
usually
never be sure when and for how long they'll be on the network. What I
have
done and suggest is that you convince management (or school
administration
or whatever serves as the "authority you don't question" in your
organization) that in order to provide security/stability/meet
SLAs/etc.,
you need to have it mandated that laptop users bring their laptops in to
stay on the premises overnight once every 'X' days. That X will be
determined by your specific environment's needs. When the user brings
their
laptop in, you plug it into the network, and let the updates run
overnight.
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Message: 3
Date: Thu, 2 Apr 2009 12:06:02 -0500
From: "Ernst, Craig S." <ERNSTCS at uwec.edu>
Subject: Re: [Casper] Can you tell if a computer is currently
executing a policy?
To: Clinton Blackmore <clinton.blackmore at westwind.ab.ca>, Casper List
<casper at list.jamfsoftware.com>
Message-ID: <C5FA5AAA.152ED%ernstcs at uwec.edu>
Content-Type: text/plain; charset="iso-8859-1"
Well...that's an interesting idea. Feature request is what I smell.
As far as I know the only real way to know what the jamf binary MAY be
doing is by looking at the jamf.log, and that'll tell you what it has
recently started to do. Beyond that the different resources it's calling
to do the work are running.
As far as looking into the JSS for this, that's probably only possible
if part of what the jamf binary does at the start of a performing a task
is to report into the JSS the status as started or in progress, but
that's about all your gonna get there on the server side I imagine.
Doesn't do that now of course.
Not sure how I'd want that dealt with...
Craig E
On 4/2/09 11:35 AM, "Clinton Blackmore"
<clinton.blackmore at westwind.ab.ca> wrote:
With long running policies (such as downloading and installing all
updates ;), it would be nice to know if a computer is currently
engaged in the task.
I suspect that one could ssh to the computer, and run 'top' or 'ps'
and find out, but is there any way to ask Casper (or even the Casper
database itself) which computers are currently working on a task but
have not reported on its completion?
Thanks,
Clinton
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Message: 4
Date: Thu, 2 Apr 2009 12:54:16 -0400
From: "Nichols, Jared" <jared.nichols at ll.mit.edu>
Subject: [Casper] Suppress image mounting
To: Casper List <casper at list.jamfsoftware.com>
Message-ID: <C5FA65F8.8345%jared.nichols at ll.mit.edu>
Content-Type: text/plain; charset="iso-8859-1"
Hi-
Is there any way to suppress the visible mounting of a dmg after you've
already created it? I did a long series of snapshots to update Acrobat
Pro 8.0 to 8.1.4 and forgot to suppress the mounting of one of the files
in the middle of the chain.
j
---
Jared F. Nichols
Desktop Engineer, Infrastructure and Operations
Information Services Department
MIT Lincoln Laboratory
244 Wood Street
Lexington, Massachusetts 02420
781.981.5436
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Message: 5
Date: Thu, 2 Apr 2009 11:10:20 -0600
From: Clinton Blackmore <clinton.blackmore at westwind.ab.ca>
Subject: Re: [Casper] Software Update - laptop labs, progress
indicator
To: Jeff Strauss <jstrauss at loyolahs.edu>
Cc: Casper List <casper at list.jamfsoftware.com>
Message-ID: <5028EECD-5AC9-417E-8FD3-1F6ED8E1FC53 at westwind.ab.ca>
Content-Type: text/plain; charset="utf-8"
One thing you can do is:
(optional) create a policy to download the updates (run the command
"softwareupdate --download --all")
create a policy with a custom trigger to install the updates.
Trigger the custom policy from ssh or remote desktop.
I actually just started on a screencast on how to do just that, and am
toying with putting it on the net. But it is pretty simple:
When you create your policy, where it says "triggered by" choose
"other (Manually specify the run at action in this field) -->" and in
the specified field, put in your trigger, ex. "software_update" You
may want to set your policy to ongoing (so it'll run whenever you
trigger it) and the scope to all computers (there is no harm if you
never trigger it on a machine you don't want it to run on).
Then, with ssh, you would do:
sudo /usr/sbin/jamf policy -trigger software_update
or use the appropriate trigger for the last parameter.
From Apple Remote Desktop, you would select your target computer,
tell it you have a unix command to run, tell it to run as root, and
use the same command (but without the sudo). It is handy to add it to
the Templates (the drop-down in the upper-right-hand corner in ARD
when specifying a unix command).
Hmm... One of the machines I've updated today (from a policy) has
kernel panicked. Maybe I can't attribute the earlier panics to user
error. When I talked to JAMF about it, they'd not heard of the issue,
and they also mentioned that you should avoid the "any" trigger unless
you really need to use it.
Cheers,
Clinton
On 2-Apr-09, at 10:40 AM, Jeff Strauss wrote:
> Will bandwidth throttling via your own SUS carry through if Casper
> policies are applying updates?
> I?m dealing with the same issue as Clinton; I have more than 500
> laptops strewn throughout campus in carts, and they?re all using
> 54Mbps wireless, so updating (and general connectivity) can
> sometimes be a pain. I was thinking of deploying Self Service to all
> the machines and adding it as an allowed application via WGM only to
> computer groups that I want to have updated, so at least updates can
> be scattered and somewhat managed on a computer group to computer
> group basis. I?d add a loginwindow message letting students know
> there are updates available and to run Self Service when they log
> in. I don?t know if that?s the best solution; I?m still
> wrestling with it in my brain.
>
> Otherwise, you could set updates to run at startup or via the
> ?any? trigger, but my experience with that has been mixed. I?ve
> tried to run updates at startup and users will get upset that it
> takes forever to log on, and I?ve tried it at ?any,? which
> seemed to work better, but can still impact performance and the user
> will get weary if they don?t know they?re receiving an update. I
> think my experience also has to do with the fact that all the
> machines are wireless, and connectivity becomes heavily impacted
> when there are more than a few dozen machines pulling down large
> files from the server simultaneously.
>
> - Jeff
>
>
> On 4/2/09 9:33 AM, "Clinton Blackmore"
<clinton.blackmore at westwind.ab.ca
> > wrote:
>
> In that case, how do you throttle it on the server side? We are
> using internet SUSes (although we really want to get a cascading SUS
> setup, so we can set on one server which updates need to go out, and
> which ones should be avoided.)
>
> I don't suppose anyone has a way to multicast software updates?
>
> Why the sudden interest in software updates? Well, we normally go
> with the policy that computers that are on our network will be
> updated when they are imaged each year, and beyond that, few things
> are critical enough to warrant it. Unfortunately, we believe that
> upgrading all of our clients will resolve some issues we've been
> having, and, so, we are updating. [BTW, has anyone seen a good
> writeup on the AFP bug that 10.5.6 is supposed to address?]
>
> Clinton
>
>
> On 2-Apr-09, at 10:25 AM, Miles Leacy wrote:
>
> On Thu, Apr 2, 2009 at 12:19 PM, Clinton Blackmore
<clinton.blackmore at westwind.ab.ca
> > wrote:
>
> Wait a second--Is it possible for a laptop, closed and in a cart, to
> run scripts and such? If so, will it go back to sleep when it is
> done, and is heat an issue? (The carts are ventilated, mind you.)
>
>
> I haven't done this in a while, so I don't recall. It's definitely
> something worth testing.
>
>
>
> Also, is it possible to throttle software update? If I wanted my
> clients to download the updates while the computers are in use (and
> not hammer the network too hard), is there any way to do that
> (preferably on the client side)?
>
>
> I don't know and, in fact, I think you can't throttle from the
> client side. You can throttle from the server side if you're
> running your own internal SUS. I recommend an internal SUS to
> anyone who manages Macs. It's relatively simple to set up, and it
> lets you control if and when updates get applied, which is important
> because Apple updates can sometimes break customizations and/or
> software that doesn't follow Apple's development rules (such as
> Microsoft and Adobe titles).
>
>
>
>
>
>
> Jeffrey A. Strauss
> Department of Educational Technology
> Systems Administrator
> Loyola High School of Los Angeles
> 1901 Venice Blvd.
> Los Angeles, Ca 90006
> (213) 381-5121 x265
>
> ? Apple Certified Support Professional
> ? Apple Certified Technical Coordinator
>
> Please consider the environment before printing this e-mail.
>
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Message: 6
Date: Thu, 2 Apr 2009 12:11:34 -0500
From: "Ernst, Craig S." <ERNSTCS at uwec.edu>
Subject: Re: [Casper] Software Update - laptop labs, progress
indicator
To: Miles Leacy <miles.leacy at themacadmin.com>, Thomas Larkin
<tlarki at kckps.org>
Cc: Casper List <casper at list.jamfsoftware.com>
Message-ID: <C5FA5BF6.152F2%ernstcs at uwec.edu>
Content-Type: text/plain; charset="iso-8859-1"
Far as I know not possible, but I've wanted that capability for this
exact scenario. Sometimes you can make the systems fit in the cart (some
carts anyway) with the lid open just enough to keep them active in the
cart, but you're still going to be the one over there making that
happen.
If the lid is closed...the system is just not accessible...period. This
is probably for good reason in most other circumstances like someone
that has their laptop in a laptop bag and then it kicks off, heats up to
no end, then melts the system down because it's suffocating.
Should it be allowed...hell yes, but don't go crying to Apple if it's
misused and ruins hardware would be my guess. =)
Craig E
On 4/2/09 11:40 AM, "Miles Leacy" <miles.leacy at themacadmin.com> wrote:
Closing the lid invokes sleep. What I'd be interested in testing is if
you can wake/boot/reboot the target machine while the lid is already
closed, and gain network access.
----------
Miles A. Leacy IV
? Certified System Administrator
? Certified Trainer
Certified Casper Administrator
----------
voice: 1-347-277-7321
miles.leacy at themacadmin.com
www.themacadmin.com <http://www.themacadmin.com>
On Thu, Apr 2, 2009 at 12:24 PM, Thomas Larkin <tlarki at kckps.org> wrote:
No it is not possible from what I understand. If it is powered on but
the lid shut it kills all network connections. I know it kills my ssh
sessions when a user closes their lid. I have had it done to me quite
often. I will get them on chat, tell them that I am ssh in and will fix
their issue with out them knowing it. I say ok the command is running
but needs time to complete, they close their lid and move along, and my
session was murdered.
___________________________
Thomas Larkin
TIS Department
KCKPS USD500
tlarki at kckps.org
blackberry: 913-449-7589
office: 913-627-0351
>>> Clinton Blackmore <clinton.blackmore at westwind.ab.ca> 04/02/09 11:19
AM >>>
Wait a second--Is it possible for a laptop, closed and in a cart, to
run scripts and such? If so, will it go back to sleep when it is done,
and is heat an issue? (The carts are ventilated, mind you.)
Also, is it possible to throttle software update? If I wanted my
clients to download the updates while the computers are in use (and not
hammer the network too hard), is there any way to do that (preferably on
the client side)?
Cheers,
Clinton
On 2-Apr-09, at 10:09 AM, Miles Leacy wrote:
Sitting in a cart powered off or asleep seems to be the main problem
here. You can use MCX (via scripting or WGM) to schedule a
boot/reboot/wake time. If you schedule this during off-hours, and then
have a software update policy following closely behind, this should
solve the issue, assuming the machines are connected to your network
while in the cart.
At one school I worked with, we had a closet built with a secure lock,
ventilation, power and ethernet. The laptops went into this closet over
the weekend where they could sit on the network and receive any
maintenance or updates.
----------
Miles A. Leacy IV
? Certified System Administrator
? Certified Trainer
Certified Casper Administrator
----------
voice: 1-347-277-7321
miles.leacy at themacadmin.com
www.themacadmin.com <http://www.themacadmin.com>
2009/4/2 Thomas Larkin
<tlarki at kckps.org>
There is also a softwareupdate binary from the command line. You could
create a policy to run or do it via ARD admin
$ softwareupdate
usage: softwareupdate <mode> [<args> ...]
-l | --listList all appropriate updates
-d | --downloadDownload Only
-i | --installInstall
<label> ...specific updates
-a | --allall appropriate updates
-r | --recommendedonly recommended updates
Per-user preferences:
--ignore <label> ...Ignore specific updates
--reset-ignoredClear all ignored updates
--schedule (on | off)Set automatic checking
-h | --helpPrint this help
If you have a SUS set up you can say run all approved updates from the
SUS and such.
___________________________
Thomas Larkin
TIS Department
KCKPS USD500
tlarki at kckps.org
blackberry: 913-449-7589
office: 913-627-0351
>>> Matthew Butch <matt at pennmanor.net> 04/02/09 9:52 AM >>>
What we have been doing is just pulling them off the cart, running
Casper Remote on them and telling them to "Install all available
updates". Its a pain, but it seems to be the best way to do it.
For the progress bar, we have a Unix command to run Software Update as
sudo which allows non-admins to install them. This is set as a Self
Service policy (the last tab allows running commands). The command is:
sudo /System/Library/CoreServices/Software\
Update.app/Contents/MacOS/Software\ Update
It gives them a nice UI to run them. We've had good feedback about it,
and it saves us from forcing them.
-Matt
On Apr 2, 2009, at 10:22 AM, Clinton Blackmore wrote:
Greetings.
How do you handle software updates on laptop labs? We have carts of
laptops in our schools, and, if they are not being used by a student,
they are charging in the cart. That doesn't provide for a nice way to
update them after hours without pulling each machine out of the cart,
and yet, I don't really want to pop up a message to a student saying,
"Your computer is going to reboot now. Deal with it!"
Also, when you use the GUI tools to do software update, the machine
logs out and you get a nice progress indicator showing that updates
are installing. Is there any way to do that from the command line?
(Yes, I know one can install updates, and Casper handles it nicely,
but can I get the progress bar? We had some machines set to update,
and then found they had kernel panicked. We wondered if a user
noticed the machine became sluggish and forced it off.) More
generally, how do you convey to users that updates are in progress?
Cheers,
Clinton Blackmore
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--
Matthew Butch
Technology Support Analyst
Penn Manor School District
717-872-9500 x 2385
http://www.pennmanor.net
Apple Certified Macintosh Technician
Apple Certified Help Desk Specialist 10.4
Apple Certified Support Professional 10.5
Apple Certified Technical Coordinator 10.4 & 10.5
Apple Certified Systems Administrator 10.4
_______________________________________________
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Message: 7
Date: Thu, 02 Apr 2009 13:23:27 -0500
From: "Thomas Larkin" <tlarki at kckps.org>
Subject: Re: [Casper] Suppress image mounting
To: "Casper List" <casper at list.jamfsoftware.com>, "Jared Nichols"
<jared.nichols at ll.mit.edu>
Message-ID: <49D4BC4F.7141.0039.0 at kckps.org>
Content-Type: text/plain; charset="utf-8"
Not sure if this will work, but when you create the package and are done
with it and you are ready to upload it, you can either put a dot in
front of the name to hide it from the finder or use the chflags command
and set it to hidden.
Test this out before hand for sure.
___________________________
Thomas Larkin
TIS Department
KCKPS USD500
tlarki at kckps.org
blackberry: 913-449-7589
office: 913-627-0351
>>> "Nichols, Jared" <jared.nichols at ll.mit.edu> 04/02/09 11:54 AM >>>
Hi-
Is there any way to suppress the visible mounting of a dmg after you?ve
already created it? I did a long series of snapshots to update Acrobat
Pro 8.0 to 8.1.4 and forgot to suppress the mounting of one of the files
in the middle of the chain.
j
---
Jared F. Nichols
Desktop Engineer, Infrastructure and Operations
Information Services Department
MIT Lincoln Laboratory
244 Wood Street
Lexington, Massachusetts 02420
781.981.5436
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