Get ride of that eth3 that breaks my zentyal gateway feature

[Laurent Dinclaux]

Hello,

My internet provider had issues one day. So I did setup my huawei 3G Usb modem on my Zentyal server. I have installed the drivers from Huawei and the USB key got seen as a network interface (eth3), which allowed me to set it up as the gateway, great.

Now that I don't need it anymore (the driver isn't DKMS compatible and need to be compiled after each kernel update), I just can't plug it off....

In order to do so, I went to zentyal administration Web UI, I set eth3 to Unused, I then uninstalled the driver and did a reboot of the server (which, as a side note, takes literally takes ages on my Intel Quad core server...).

After reboot, my network did not have access to Internet. Trying to change any settings related to the network doesn't work anymore, Zentyal complaining that an error occurred and that it can't apply changes.

Looking at /var/log/zentyal/zentyal.log while saving changes I found the error:

2013/06/17 09:17:07 ERROR> Service.pm:866 EBox::Module::Service::__ANON__ - Error restarting service: Interface eth3 n'existe pas.

The last part of the error message is in french and can be translated to "The eth3 interface doesn't exists" ... The only fix I have found is to plug back the Huawei 3G Usb key, reinstall the driver and then reboot. But I do need that 3G Usb modem for other uses, I don't want to keep it plugged in my server (it also seems like the driver suffers from a memory leak issue)

How should I tell Zentyal that an interface has been removed ?

[christian]

Instead of removing drivers, can't you, as a workaround, waiting for Zentyal to provide "remove interface" capability, deactivate this interface ?
I'm running Zentyal test server from time to time, built with 4 network interfaces. I often don't need all the 4 NIC. In such case, I do not configure NICs that are not required and it works well like this.

I don't understand in you explanation what is breaking Zentyal gateway feature. Is is lack of interface removal capability because you would like Zentyal to be "clean" or is it because you need you modem elsewhere or because installing your modem back activates it without capability to deactivate it.

[Laurent Dinclaux]

I need to use the modem elsewhere.

If I simply unplug it, a reboot will break the gateway feature. Ubuntu is fine removing it when it doesn't exists anymore. But it seems to be kept somewhere by Zentyal because zentyal complains about it missing in the logs.

[christian]

Have a look at Zentyal DB. I suspect it is described somewhere there.
Once you have removed it from Ubuntu, you may edit DB record.

[Laurent Dinclaux]

How, please, do I access that Zentyal DB ?

[christian]

Depends on your Zentyal version:
- till 2.2, Zentyal uses Postgres DB
- starting with 3.0 (if I'm not wrong) they moved to MySQL

[Laurent Dinclaux]

Thanks. I use 3.0. Where is that Zentyal DB password located please? What is the username ?

I found one in /var/lib/zentyal/conf/ebox.passwd but it doesn't seems to work.

[Laurent Dinclaux]

Found it thanks. The username is zentyal and the password is in /var/lib/zentyal/conf/zentyal-mysql.passwd, now I have to find where that eth3 record is kept. I hope I won't break anything ....

[christian]

Easy, if you don't post here anymore, it will mean that it is indeed broken   

[Laurent Dinclaux]

Lol.

Searching all fields in all tables using phpmyadmin returns 0 result... damn ...

[Rafael Muylaert]

I had this problem once when I had a failure in the ethernet module of my server's motherboard. what I did was to comment out the part that refers to said network interface in /etc/udev/rules.d/70-persistent-net.rules

It worked ok for me because I added other network cards that took over the names of the previously configured cards.

Also, I think before setting eth3 to unused in the web UI, it would be good to set it with a static ip that is not used in any other interface.

[Laurent Dinclaux]

Thanks but that is something I already tried to do ...

[Laurent Dinclaux]

Here is what I can find (the USB modem plugged in)

Code: [Select]

$ sudo grep -r eth3 /etc/
/etc/udev/rules.d/70-persistent-net.rules:SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:1e:10:1f:00:01", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth3"

Code: [Select]

$ sudo grep -r eth3 /var/lib/zentyal/
Binary file /var/lib/zentyal/temp-3691.rdb matches
grep: /var/lib/zentyal/zavs: No such device or address
Binary file /var/lib/zentyal/temp-3809.rdb matches
Binary file /var/lib/zentyal/temp-3272.rdb matches
Binary file /var/lib/zentyal/temp-4050.rdb matches
Binary file /var/lib/zentyal/dump.rdb matches