* [bug#43257] [PATCH] services: nfs: Require file-systems to be mounted before starting NFS shepherd service.
@ 2020-09-07 16:47 Danny Milosavljevic
2020-09-09 8:27 ` Ludovic Courtès
0 siblings, 1 reply; 9+ messages in thread
From: Danny Milosavljevic @ 2020-09-07 16:47 UTC (permalink / raw)
To: 43257; +Cc: Danny Milosavljevic
* gnu/services/nfs.scm (nfs-shepherd-services): Require file-systems to be
mounted before starting NFS shepherd service.
---
gnu/services/nfs.scm | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/gnu/services/nfs.scm b/gnu/services/nfs.scm
index 859097e788..24f746485b 100644
--- a/gnu/services/nfs.scm
+++ b/gnu/services/nfs.scm
@@ -292,7 +292,7 @@
(shepherd-service
(documentation "Run the NFS statd daemon.")
(provision '(rpc.statd))
- (requirement '(/proc/fs/nfsd rpcbind-daemon))
+ (requirement '(/proc/fs/nfsd rpcbind-daemon file-systems))
(start
#~(make-forkexec-constructor
(list #$(file-append nfs-utils "/sbin/rpc.statd")
@@ -311,7 +311,7 @@
(shepherd-service
(documentation "Run the NFS mountd daemon.")
(provision '(rpc.mountd))
- (requirement '(/proc/fs/nfsd rpc.statd))
+ (requirement '(/proc/fs/nfsd rpc.statd file-systems))
(start
#~(make-forkexec-constructor
(list #$(file-append nfs-utils "/sbin/rpc.mountd")
@@ -326,7 +326,7 @@
(shepherd-service
(documentation "Run the NFS daemon.")
(provision '(rpc.nfsd))
- (requirement '(/proc/fs/nfsd rpc.statd networking))
+ (requirement '(/proc/fs/nfsd rpc.statd networking file-systems))
(start
#~(lambda _
(zero? (apply system* #$(file-append nfs-utils "/sbin/rpc.nfsd")
@@ -352,7 +352,7 @@
(shepherd-service
(documentation "Run the NFS mountd daemon and refresh exports.")
(provision '(nfs))
- (requirement '(/proc/fs/nfsd rpc.nfsd rpc.mountd rpc.statd rpcbind-daemon))
+ (requirement '(/proc/fs/nfsd rpc.nfsd rpc.mountd rpc.statd rpcbind-daemon file-systems))
(start
#~(lambda _
(let ((rpcdebug #$(file-append nfs-utils "/sbin/rpcdebug")))
^ permalink raw reply related [flat|nested] 9+ messages in thread* [bug#43257] [PATCH] services: nfs: Require file-systems to be mounted before starting NFS shepherd service.
2020-09-07 16:47 [bug#43257] [PATCH] services: nfs: Require file-systems to be mounted before starting NFS shepherd service Danny Milosavljevic
@ 2020-09-09 8:27 ` Ludovic Courtès
2020-09-09 10:13 ` Danny Milosavljevic
0 siblings, 1 reply; 9+ messages in thread
From: Ludovic Courtès @ 2020-09-09 8:27 UTC (permalink / raw)
To: Danny Milosavljevic; +Cc: 43257
Hey!
Danny Milosavljevic <dannym@scratchpost.org> skribis:
> * gnu/services/nfs.scm (nfs-shepherd-services): Require file-systems to be
> mounted before starting NFS shepherd service.
[...]
> +++ b/gnu/services/nfs.scm
> @@ -292,7 +292,7 @@
> (shepherd-service
> (documentation "Run the NFS statd daemon.")
> (provision '(rpc.statd))
> - (requirement '(/proc/fs/nfsd rpcbind-daemon))
> + (requirement '(/proc/fs/nfsd rpcbind-daemon file-systems))
Why do we need all of ‘file-systems’ rather than just the state file
systems?
Curiously,
Ludo’.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [bug#43257] [PATCH] services: nfs: Require file-systems to be mounted before starting NFS shepherd service.
2020-09-09 8:27 ` Ludovic Courtès
@ 2020-09-09 10:13 ` Danny Milosavljevic
2020-09-10 7:42 ` Ludovic Courtès
0 siblings, 1 reply; 9+ messages in thread
From: Danny Milosavljevic @ 2020-09-09 10:13 UTC (permalink / raw)
To: Ludovic Courtès; +Cc: 43257
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Hi Ludo,
On Wed, 09 Sep 2020 10:27:30 +0200
Ludovic Courtès <ludo@gnu.org> wrote:
> Why do we need all of ‘file-systems’ rather than just the state file
> systems?
It really depends on what one uses it for, but for me it's this use case:
* I have an extra hard drive that contains things I want to serve via
NFS (it has nothing to do with the root file system).
* The extra hard drive has to be mounted when NFS service starts up,
otherwise exportfs errors out:
If I don't require "file-systems", even if that drive is listed in the
operating-system's file-systems list, it won't be mounted in time.
I ran into this problem when merging Stefan's
new "nfs-root-fs" system test into gnu/tests/nfs.scm .
Does this make sense or is it the wrong solution?
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^ permalink raw reply [flat|nested] 9+ messages in thread
* [bug#43257] [PATCH] services: nfs: Require file-systems to be mounted before starting NFS shepherd service.
2020-09-09 10:13 ` Danny Milosavljevic
@ 2020-09-10 7:42 ` Ludovic Courtès
2020-09-10 13:20 ` Danny Milosavljevic
0 siblings, 1 reply; 9+ messages in thread
From: Ludovic Courtès @ 2020-09-10 7:42 UTC (permalink / raw)
To: Danny Milosavljevic; +Cc: 43257
Hi Danny,
Danny Milosavljevic <dannym@scratchpost.org> skribis:
> On Wed, 09 Sep 2020 10:27:30 +0200
> Ludovic Courtès <ludo@gnu.org> wrote:
>
>> Why do we need all of ‘file-systems’ rather than just the state file
>> systems?
>
> It really depends on what one uses it for, but for me it's this use case:
>
> * I have an extra hard drive that contains things I want to serve via
> NFS (it has nothing to do with the root file system).
> * The extra hard drive has to be mounted when NFS service starts up,
> otherwise exportfs errors out:
> If I don't require "file-systems", even if that drive is listed in the
> operating-system's file-systems list, it won't be mounted in time.
Oh, I see.
> I ran into this problem when merging Stefan's
> new "nfs-root-fs" system test into gnu/tests/nfs.scm .
>
> Does this make sense or is it the wrong solution?
I just realized that these services should just all depend on
‘user-processes’ (which depends on ‘file-systems’). So you should
probably just do that.
You can double-check with ‘guix system shepherd-graph’ that the
dependency graph looks good.
Thanks,
Ludo’.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [bug#43257] [PATCH] services: nfs: Require file-systems to be mounted before starting NFS shepherd service.
2020-09-10 7:42 ` Ludovic Courtès
@ 2020-09-10 13:20 ` Danny Milosavljevic
2020-09-11 7:02 ` Ludovic Courtès
0 siblings, 1 reply; 9+ messages in thread
From: Danny Milosavljevic @ 2020-09-10 13:20 UTC (permalink / raw)
To: Ludovic Courtès; +Cc: 43257
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Hi Ludo,
On Thu, 10 Sep 2020 09:42:58 +0200
Ludovic Courtès <ludo@gnu.org> wrote:
> I just realized that these services should just all depend on
> ‘user-processes’ (which depends on ‘file-systems’). So you should
> probably just do that.
Okay. Thanks.
> You can double-check with ‘guix system shepherd-graph’ that the
> dependency graph looks good.
$ ./pre-inst-env guix system shepherd-graph -e '(@@ (gnu tests nfs) %nfs-os)'
gnu/tests/nfs.scm:162:4: error: missing root file system
I can probably work around it somehow--but just logging this not-nice user
interface here.
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^ permalink raw reply [flat|nested] 9+ messages in thread
* [bug#43257] [PATCH] services: nfs: Require file-systems to be mounted before starting NFS shepherd service.
2020-09-10 13:20 ` Danny Milosavljevic
@ 2020-09-11 7:02 ` Ludovic Courtès
2020-09-11 8:23 ` Danny Milosavljevic
0 siblings, 1 reply; 9+ messages in thread
From: Ludovic Courtès @ 2020-09-11 7:02 UTC (permalink / raw)
To: Danny Milosavljevic; +Cc: 43257
Howdy,
Danny Milosavljevic <dannym@scratchpost.org> skribis:
> On Thu, 10 Sep 2020 09:42:58 +0200
> Ludovic Courtès <ludo@gnu.org> wrote:
>
>> I just realized that these services should just all depend on
>> ‘user-processes’ (which depends on ‘file-systems’). So you should
>> probably just do that.
>
> Okay. Thanks.
>
>> You can double-check with ‘guix system shepherd-graph’ that the
>> dependency graph looks good.
>
> $ ./pre-inst-env guix system shepherd-graph -e '(@@ (gnu tests nfs) %nfs-os)'
> gnu/tests/nfs.scm:162:4: error: missing root file system
>
> I can probably work around it somehow--but just logging this not-nice user
> interface here.
Any suggestions? :-)
The only think I could think of is transparently adding a dummy root
file system for the purposes of ‘shepherd-graph’, but it’s not
necessarily a good idea either.
Thanks,
Ludo’.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [bug#43257] [PATCH] services: nfs: Require file-systems to be mounted before starting NFS shepherd service.
2020-09-11 7:02 ` Ludovic Courtès
@ 2020-09-11 8:23 ` Danny Milosavljevic
2020-09-11 14:47 ` Ludovic Courtès
0 siblings, 1 reply; 9+ messages in thread
From: Danny Milosavljevic @ 2020-09-11 8:23 UTC (permalink / raw)
To: Ludovic Courtès; +Cc: 43257
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Hi Ludo,
On Fri, 11 Sep 2020 09:02:09 +0200
Ludovic Courtès <ludo@gnu.org> wrote:
> Any suggestions? :-)
>
> The only think I could think of is transparently adding a dummy root
> file system for the purposes of ‘shepherd-graph’, but it’s not
> necessarily a good idea either.
It depends on whether we want to have developer tools--but if we do, it would
be nice to be more forgiving on some errors (for example have a "developer"
switch that would add missing fields if they are harmless and don't change
the result. Or maybe just have a procedure available that would do that
which the dev could add a call to with "-e").
That said, not sure that it's a good idea.
I'm just always logging weird things so we actually can see them.
It's not necessarily something we can (or should) fix :-)
However, this %nfs-os is used almost unchanged for marionette-operating-system.
So I got this idea:
$ ./pre-inst-env guix system shepherd-graph -e '((@ (gnu tests) marionette-operating-system) (@@ (gnu tests nfs) %nfs-os)))'
gnu/tests.scm:161:2: error: missing root file system
... doesn't work either. Well now that's weird.
That operating-system is eventually passed to "virtual-machine".
So that means we can't use shepherd-graph on VMs?
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^ permalink raw reply [flat|nested] 9+ messages in thread
* [bug#43257] [PATCH] services: nfs: Require file-systems to be mounted before starting NFS shepherd service.
2020-09-11 8:23 ` Danny Milosavljevic
@ 2020-09-11 14:47 ` Ludovic Courtès
2020-09-11 17:50 ` Danny Milosavljevic
0 siblings, 1 reply; 9+ messages in thread
From: Ludovic Courtès @ 2020-09-11 14:47 UTC (permalink / raw)
To: Danny Milosavljevic; +Cc: 43257
Danny Milosavljevic <dannym@scratchpost.org> skribis:
> Hi Ludo,
>
> On Fri, 11 Sep 2020 09:02:09 +0200
> Ludovic Courtès <ludo@gnu.org> wrote:
>
>> Any suggestions? :-)
>>
>> The only think I could think of is transparently adding a dummy root
>> file system for the purposes of ‘shepherd-graph’, but it’s not
>> necessarily a good idea either.
>
> It depends on whether we want to have developer tools--but if we do, it would
> be nice to be more forgiving on some errors (for example have a "developer"
> switch that would add missing fields if they are harmless and don't change
> the result. Or maybe just have a procedure available that would do that
> which the dev could add a call to with "-e").
>
> That said, not sure that it's a good idea.
>
> I'm just always logging weird things so we actually can see them.
>
> It's not necessarily something we can (or should) fix :-)
>
> However, this %nfs-os is used almost unchanged for marionette-operating-system.
>
> So I got this idea:
>
> $ ./pre-inst-env guix system shepherd-graph -e '((@ (gnu tests) marionette-operating-system) (@@ (gnu tests nfs) %nfs-os)))'
> gnu/tests.scm:161:2: error: missing root file system
>
> ... doesn't work either. Well now that's weird.
>
> That operating-system is eventually passed to "virtual-machine".
>
> So that means we can't use shepherd-graph on VMs?
No: that just means that ‘virtualized-operating-system’ adds a root file
system transparently, which is why we can afford not providing one in
OSes that are only meant to be used through ‘guix system vm’.
But ‘shepherd-graph’ doesn’t know about that: it takes your OS as is and
show you the info.
Hope that makes sense!
Ludo’.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [bug#43257] [PATCH] services: nfs: Require file-systems to be mounted before starting NFS shepherd service.
2020-09-11 14:47 ` Ludovic Courtès
@ 2020-09-11 17:50 ` Danny Milosavljevic
0 siblings, 0 replies; 9+ messages in thread
From: Danny Milosavljevic @ 2020-09-11 17:50 UTC (permalink / raw)
To: Ludovic Courtès; +Cc: 43257
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Hi Ludo,
On Fri, 11 Sep 2020 16:47:14 +0200
Ludovic Courtès <ludo@gnu.org> wrote:
> No: that just means that ‘virtualized-operating-system’ adds a root file
> system transparently, which is why we can afford not providing one in
> OSes that are only meant to be used through ‘guix system vm’.
>
> But ‘shepherd-graph’ doesn’t know about that: it takes your OS as is and
> show you the info.
That makes sense.
So that means a user/developer can't use shepherd-graph on VMs :P
That's a very bad user interface.
Especially since if you are using shepherd-graph chances are you already are
diagnosing a problem and don't want to have to diagnose more problems first
in order to solve that one.
Personally I'd make it emit a warning and add a rootfs if it's harmless in
order to have this usecase (using shepherd-graph on VMs) be supported. If
we want that.
But it's fine for now--I just wanted to make sure to point out the pain points.
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^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2020-09-11 17:51 UTC | newest]
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2020-09-07 16:47 [bug#43257] [PATCH] services: nfs: Require file-systems to be mounted before starting NFS shepherd service Danny Milosavljevic
2020-09-09 8:27 ` Ludovic Courtès
2020-09-09 10:13 ` Danny Milosavljevic
2020-09-10 7:42 ` Ludovic Courtès
2020-09-10 13:20 ` Danny Milosavljevic
2020-09-11 7:02 ` Ludovic Courtès
2020-09-11 8:23 ` Danny Milosavljevic
2020-09-11 14:47 ` Ludovic Courtès
2020-09-11 17:50 ` Danny Milosavljevic
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