LinuxQuestions.org - Best way to mount remote shares automatically?

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gallard

01-18-2014 02:18 PM

Best way to mount remote shares automatically?

When I boot my laptop, my remote shares are mounted automatically by fstab.
But I rarely reboot my laptop.
When I leave my local network area, shares are unmounted automatically.
When I come back, I reconnect using a manual mount command.
That works fine but I would like to know if there is a way to automatically reconnect the shares?
Thanks
Using Mageia3 with KDE

dolphin_oracle

01-19-2014 07:23 PM

can your network manager run a script upon connection to a network? Might be an option (I think wicd has this sort of feature).

18Googol2

01-20-2014 12:48 AM

pam_mount can be what you looking for :)

Tadaen

01-21-2014 03:01 PM

I'm very new to scripting but maybe a script that checks if the shares are there or not, if they are it mounts them, if not then it just exits. Put it on roots crontab every... 5 minutes?

Tadaen

01-21-2014 03:30 PM

First function I've made with a bit of googling to find the command to use.

Code:

#!/bin/bash

#Check if mounted & mount if not from /etc/fstab

#Tadaen Sylvermane

#Created 2014/1/21



if mountpoint -q /path/to/mount ; then

        exit 1

else

        mount -a 

        exit 1

fi

Now that I've made this I will likely use it in the near future here and just have it run as a root crontab every couple mins.

gallard

01-24-2014 12:07 PM

Variation on a theme

Thanks Tadaen
mountpoint is a good avenue.
Your solution works fine but it may fill your log with useless messages when you're not connected to server.
I propose:

Code:

SRV=tatata

MNT=mount_point

if mountpoint -q $MNT; then

  exit 1; # already mounted

elif ping -c 1 $SRV >/dev/null; then

  mount $MNT # we assume it is defined in fstab

  exit 2; # mount

else

  exit 3; # server unreachable

fi

or, if you prefer brevity:

Code:

SRV=tatata

MNT=mount_point

if ! mountpoint -q $MNT && ping -c 1 $SRV>/dev/null; then mount $MNT; fi

Tadaen

01-25-2014 11:49 AM

I am very new to scripting. I like your idea better. As far as the log is concerned I could probably alter mine to run once with a while statement and just have it sleep 300 or so. Shouldn't fill the log up then I would imagine. I don't know enough though. I will test it. Yours is more elegant though from what little I do know.

Tadaen

01-25-2014 12:01 PM

Code:

#!/bin/bash

#Check if mounted & mount if not from /etc/fstab

#Add to boot list as root.

#Tadaen Sylvermane

#Created 2014/1/25



while true; do

                if mountpoint -q /path/to/mountpoint ; then

                sleep 60

        else

                mount -a 

                sleep 60

        fi

done

This one works and doesn't fill the log. Set to run at boot and let it go I guess.

*EDIT* Actually looking at how easy this was to set up as a while loop I will be changing some of my other scripts so that they also don't load the log with nonsense as I have 2 that run every 30 mins and 1 that runs every 10 to backup my ramdisk.

Tadaen

01-26-2014 10:33 PM

Better still. Will run every 5 minutes. This requires the shares to be in the /etc/fstab.

Code:

#!/bin/bash

#Runtime Script

#Tadaen Sylvermane

#Last Edit 2014/1/26



#Variables#



MNTPT=/path/to/mount



#####Begin Script#####



mountshares() {

        if mountpoint -q $MNTPT ; then

                return 0 

        else

                mount -a

        fi

}



while true

do

        mountshares

        sleep 300

done

gallard

01-27-2014 01:09 PM

Hi Tadaen
OK! Let's suppose you're out of the office and your server is not reachable.
Every 5 minutes, you will attempt a mount and an error message will be logged.
That's what I meant by "fill with useless message".
Would be better to check for reachabibity before you call mount. You can do it with "ping -c 1".

Next, suppose you have 2 servers, possibly on two different networks (or in 2 offices).
One being reachable does not mean the other is.
So your "mount -a" will generate useless messages for the unreachable server.

Conclusions
- do a ping before you attempt mounting of remote ressources. Only attempt mounting if server is reachable.
- do it "per server" and do not use "mount -a"
As an exercise you may try to write a function with 2 arguments (server_address and mount_point).

Tadaen

01-27-2014 04:14 PM

i got it backwards you are correct. looking into it now.

*EDIT* Ok for samba, and mounting as user not root. Lines like this in the /etc/fstab. I'm guessing this could be modified for just a certain user so no one else can mount them but I'm done googling for now.

Code:

//ServerIP/Share /mount/point cifs credentials=/home/youruser/creds,noauto,user 0 0

Then this... I don't know if it's sloppy or what but I do know that it works. Runs every 5 minutes. Does not spam log (unless it logs pings at which point I give up).

Code:

#!/bin/bash

#Automount Network Shares

#Tadaen Sylvermane

#Last Edit 2014/1/27



#Variables#



##Server 1



SRV1IP=ip

SRV1MNT=mountpoint

SRV1=//ip/share



#####Begin Script#####



automount()

{        

##Server 1

        if ping -c 1 $SRV1IP ; then

                if mountpoint -q $SRV1MNT ; then

                        return 0

                else

                        mount $SRV1

                fi

        else                        

                return 0

        fi

}



while true

do

        automount

        sleep 300

done



#####End Script#####

Copy paste and change variables accordingly to add servers.

*EDIT* Thank you for the suggestions and somewhat challenge. I am trying to learn as fast as I can.

gallard

01-28-2014 07:49 AM

Variation on a theme

Hi!
when a share is declared in /etc/fstab then mount can be called either with the mount_point or the share_path
This enable you to reduce the number of args to 2

Code:

# mymount()

# 1st arg: server address (name or ip)

# 2nd arg: local mount point

mymount() {

  if ! mountpoint -q $2 then

    if ping -c 1 $1 >/dev/null; then

      mount $2

    fi

  fi

}



while true

do

  mymount ip1 mountpoint1

  mymount ip2 mountpoint2



  sleep 300

done

The 300 seconds delay can be reduced to a low value since there's nomore useless messages in log (and, by the way, ping do not write into system log)
Also, I did put the mountpoint call in front of ping because mountpoint is a lighter and faster system call. But it would also work the other way around.

Tadaen

01-28-2014 08:16 AM

And now I think I understand positional parameters. I learn by example. Thank you much.

Also didn't know until now that you could mount an /etc/fstab entry by the mountpoint and not the device / location you are mounting from.

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