partially deleting virtual server

Virtualmin
1

Hi

I deleted a virtual server but now I see that something, related to this virtual server, still exist like unix user, mysql/postgresql database, email boxes, apache webserver, bind dns address…

The only thing I don’t see is the address in virtualmin virtual servers list.

Now I’d like to recreate this virtual server but I got this error:

Failed to create virtual server : A unix user called elettrolinux.com or group called elettrolinux.com already exists

No problem, i delete the linux user (userdel elettrolinux), mysql/postgresql database, apache webserver, bind dns address. After that, I try to reinstall this virtual server but it isn’t created (because I don’t see it in the virtualmin virtual servers list)

Creating administration group elettrolinux.com .. .. done

Creating administration user elettrolinux …
… done

Creating aliases for administration user …
… aliases failed : Failed to regenerate table /etc/postfix/virtual: at …/web-lib-funcs.pl line 982.

Adding administration user to groups …
… done

Creating home directory …
… done

Creating mailbox for administration user …
… mailbox failed : Failed to query Postfix config command to get the current value of parameter home_mailbox: at …/web-lib-funcs.pl line 982.

Adding to email domains list …
… Mail for domain failed! : Failed to regenerate table /etc/postfix/virtual: at …/web-lib-funcs.pl line 982.

Adding new DNS zone …
… done

Adding new virtual website …
… done

Adding Apache user www-data to server’s group …
… done

Setting up scheduled Webalizer reporting …
… done

Setting up log file rotation …
… Log file rotation failed! : … the log file /home/elettrolinux/logs/access_log is already being rotated at …/web-lib-funcs.pl line 982.

Creating MySQL login …
… done

Creating MySQL database elettrolinux_com …
… done

Creating PostgreSQL login …

How can I create this virtual server?
I am still using 3.57 PRO on Debian. I’ll upgrade it after we resolve this problem.

Thank you very much
Maurizio1230

2

After last elettrolinux virtual server creation, elettrolinux user cannot login in too.

Creating aliases for administration user …

.. aliases failed : Failed to regenerate table /etc/postfix/virtual: at ../web-lib-funcs.pl line 982.

Creating mailbox for administration user …

… mailbox failed : Failed to query Postfix config command to get the current value of parameter home_mailbox: at …/web-lib-funcs.pl line 982.

Maybe because I didn’t delete some elettrolinux’s postfix config.

How can I delete it?

3

Good morning,

Well, there’s some files Virtualmin creates in /etc/postfix, such as “virtual” and “vmailbox” – that should contain your mailbox users and aliases.

However, I’d definitely be careful in what you remove – and I might even recommend filing a Bug/Issue so the Virtualmin guys can give you better guidance on how to fix that up. Especially since, in theory, Virtualmin would normally remove all that :slight_smile:
-Eric

4
.. mailbox failed : Failed to query Postfix config command to get the current value of parameter home_mailbox: at ../web-lib-funcs.pl line 982.

This usually happens when you’re getting memory allocation errors. i.e. not enough RAM and/or swap.

You’ll either need more memory, or reduce the number of services you use. Check the Virtualmin on Low Memory Systems guide:

http://www.virtualmin.com/documentation/id,virtualmin_on_low_memory_systems/

5

Hi joe,

I have about 3 gb of memory

Real memory 3.08 GB total, 729.79 MB used
but on Virtuozzo I see a "feature" in Red Zone (like you say): privvmpages

privvmpageg - Memory allocation limit
86,275(Current Use)
128,536(Soft Limit)
132,632(Hard Limit)
4KB pages(Units)

How much Memory allocation should I need?

Thank you very much

6

More. :wink:

It depends on what capabilities you need…but 128MB is definitely too small for a full-featured system that includes mail and databases and a big fat Apache process. You’ll need to strip back quite a lot, if you want to run comfortably in 128MB. Or give it more memory to work with.

Again, if you can make swap available, it’ll also work rather than fail catastrophically like this (though it’ll be much slower).

7

Hi Joe,

I give more info about my memory

fx3432:~# free -m total used free shared buffers cached Mem: 3155 3108 47 0 3 2383 -/+ buffers/cache: 720 2435 Swap: 7820 86 7734

47 free? Is it impossible. On virtualmin system information I see that (3.08 GB total, 725.41 MB used)
What’s Virtual memory? (7.64 GB total, 81.34 MB used)

Swap available? Is it unavailable?

In conclusion, I need to add more memory allocation.
but what is memory allocation? Maybe Memory allocation can change if I have more ram? See virtuozzo’s definition:

The size of private (or potentially private) memory allocated by an application. The memory that is always shared among different applications is not included in this resource parameter.

Sorry for my ignorance :frowning:

8

Howdy,

Well, the RAM that Linux is showing you there is good (we’ll get to Virtuozzo in a moment).

The free -m is showing that although you’re using 3108M of RAM, 2383M of that is cached.

So, 3108 - 2383 is the 725M you see Virtualmin telling you is used. The Linux kernel will make the cached RAM available as necessary.

From you listing there, it certainly looks like the swap has 7734M available (which in theory is more than plenty).

Okay, so then, that leaves us still wondering what in the world is going on :wink:

I don’t really know much about Virtuozzo, so I don’t know that I can offer a ton of help. But does it log when an application uses up allocated/available memory? If it does, perhaps the error it provides could help you figure out what needs tweaked?

But yeah, if "memory allocation" is the issue, you might poke around in Virtuozzo and see if you can increase available memory limits.

Just some thoughts!
-Eric

9

I believe what you’re showing us is the host system…and where you’re running Virtualmin is the guest system. If that’s the case, those numbers (the ones showing 3GB of RAM, etc.) are irrelevant. They do not matter.

What matters is how much the Virtuozzo instance has available–that’s the point of Virtuozzo (and other, better, virtualization technologies): to divide the system into pieces so many people can have a “root-level” experience.

10

Hi,

As Maurizio Stated ：

“I deleted a virtual server but now I see that something, related to this virtual server, still exist like unix user, mysql/postgresql database, email boxes, apache webserver, bind dns address…

The only thing I don’t see is the address in virtualmin virtual servers list.”

1。 How do I prevent this from happening in the future, for myself and clients creating and deleting servers。
2。 What would be the right way to go in deleting these related services and creating a new virtual server with the same name as the old server.

Thanks in advance,