[systemd-devel] Hang when mounting NFS via systemd

[Wolf Erik]

Lennart Poettering wrote:
> On Sun, 23.09.12 17:21, Bardur Arantsson (spam at scientician.net) wrote:
> 
>> Hi all,
>> 
>> (Hopefully this list is appropriate for this -- please let me know if
>> there's a more appropriate one.)
>> 
>> I'm having a little trouble with NFS mounts when starting them via
>> systemd, but I'm hoping that I may have missed something obvious.
>> 
>> Here's the snippet from /etc/fstab:
>> 
>> 192.168.0.1:/srv/vg0p-data  /data nfs \
>>    defaults,proto=tcp,nfsvers=4,vers=4,noauto 0 1
>> 
>> (Line split here for readability, it's a single line in the actual
>> file.) 
>> 
>> When I run
>> 
>>    # systemctl --version
>>    systemd 189
>>    arch
>>    +PAM -LIBWRAP -AUDIT -SELINUX -IMA -SYSVINIT \
>>          +LIBCRYPTSETUP +GCRYPT +ACL +XZ
>> 
>>    # systemctl start data.mount
>> 
>> I get the output
>> 
>>    A dependency job failed. See system journal for details.
>> 
>> after a longish timeout (guessing it's the default 90s). In the
>> journal I get: 
>> 
>> Sep 23 17:08:45 gwendolyn systemd[1]: Job
>> 192.168.0.1:-srv-vg0p\x2ddata.device/start timed out.
>> Sep 23 17:08:45 gwendolyn systemd[1]: Job data.mount/start failed
>> with result 'dependency'.
> 
> This indicates a bug i systemd actually. For some reason systemd
> appears to believe that your NFS share is a device to wait for. 
> 
> I tried to fix this in git with two commits. Please test!

Hi,

I got probably a similar problem to this one. 

I have a mount unit which will mount my home device if my system boot from NAND.

[Unit]                                                                                                                                                             
Description=Mount Home Directory                                                                                                                                   
Requires=check-data.service                                                                                                                                        
Before=local-fs.target                                                                                                                                             
ConditionKernelCommandLine=root=ubi0:root                                                                                                                          
DefaultDependencies=false                                                                                                                                          
                                                                                                                                                                   
[Mount]                                                                                                                                                            
What=/dev/ubi1_0                                                                                                                                                   
Where=/home                                                                                                                                                        
Type=ubifs                                                                                                                                                         
Options=defaults 

If I start from NAND I've got the accordingly device "dev/ubi1_0" - but if I start from NFS, the device isn't available.
But systemd creates the dependencies between home.mount and dev-ubi1_0.device whether if I boot from NAND or NFS and therefore the system boot fails in case of boot from NFS.

[ TIME ] Timed out waiting for device dev-ubi1_0.device.                                                                                                           
[DEPEND] Dependency failed for Mount Home Directory.     

I've tried to disable this cause with ConditionKernelCommandLine=root=ubi0:root and DefaultDependencies=false --> No improvment. Also disabling the mount unit isn't the solution.

Is there a possibility to disable the dependencies or is this the problem at all? 

> 
> Lennart



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i.A. Erik Wolf
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