[CentOS] safest way to grow a LV under VMware ESXi5.5

[Tnjulius]

Hi,
The best and safe way to do that is by adding another vHD as a new PV to your root_vg and then grow your LV. No need to stop services, shutdown or reboot the VM; if it's in prod environment. 

Julius

> On Oct 30, 2015, at 19:18, Boris Epstein <borepstein at gmail.com> wrote:
> 
>> On Fri, Oct 30, 2015 at 12:57 PM, <m.roth at 5-cent.us> wrote:
>> 
>> Boris Epstein wrote:
>>> Hello all,
>>> 
>>> In your view, what is the most reliable and safe way to increase an LV
>>> housing the root filesystem of a Centos 6 VM. I am thinking either
>> growing
>>> the virtual HD virtual device, or creating a new device and adding it as
>> a
>>> PV to the VM, or perhaps migrating the whole FS to a new virtual disk.
>>> 
>>> Any input on how best to proceed would be appreciated.
>> Dumb question: why do you need a larger root filesystem?
>> 
>> First, how big is root? And if this is for stuff under, say, /var/www, I'd
>> make a separate logical drive/partition, and mount that, rsync everything
>> from /var/www to that, then shut down the web, and remount the new
>> filesystem on /var/www.
>> 
>> Root, itself, doesn't need to be huge. We're using 500G, and seriously
>> considering making it 125G in the future, with data, or web stuff, is on a
>> separate partition, so when there's a sudden explosion of data, / is safe.
>> 
>>       mark
> 
> 
> Mark,
> 
> Thanks for your input.
> 
> Well, we are talking much smaller scale here (only about 30 GB at present,
> planning to roughly double it).
> 
> I agree with you that it is best to keep usage/operational data outside of
> root - but it just historically so happened that this is how we do things.
> So for now this is the task and I need to perform it somehow.
> 
> Cheers,
> 
> Boris.
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