FBSD jail versus VMWare? What services do YOU run in a jail?

Boris borisbsd at gmail.com
Fri Apr 25 04:02:16 UTC 2014

Hi Alejandro,

Can you move a 'live' jail from server to server?
I have never tried but some people like the vMotion option from VMware and
for having tried it, it's quite impressive in action.

For the rest, I used jails a long long time ago, I guess Marketing was not
behind jails the same way it has been behind VMware products although, to
be fair, GSX and ESX have be out there for ages...there has been a lot more
press since ESXi4.something and 5


On Wed, Apr 23, 2014 at 4:09 PM, Alejandro Imass <aimass at yabarana.com>wrote:

> >    On 14-04-22 3:47 PM, edflecko . wrote:
> >
> > I'm really interested in the comparison of using a FBSD jail rather than
> > VMWare in the context of virtualization.
> >
> > At my business, we heavily use VMWare - you might say we consider
> ourselves
> > a VMWare "shop". 99% of our servers are virtualized.
> >
> > I've heard that it's possible to run hundreds, if not thousands, of
> > services in FBSD jails on a given host server because of the sharing of
> > resources that all of your jails take advantage of. If I understand that
> > correctly, that's one of the HUGE advantages of running services in jails
> > as opposed to creating VM after VM after VM - each VM eats up disk space
> on
> > the SAN as well as memory resources, etc. Additionally, the jailed
> service
> > is far better from a security perspective?
> >
> > Having said all of that, I'm curious to hear from some of you who may be
> > doing just this - are you running a FBSD server with some of your mission
> > critical services (Apache, Bind, DHCP, etc., etc.) within jails and how
> do
> > you like it versus running hundreds of VMs and VMWare?
> >
> Hi Ed,
> I have used FBSD Jails for many years running dozens and dozens of
> jails per severs. I use EZJail which simplifies the set-up and further
> reduces the disk space usage as all jails derive from a single base
> jail, and greatly simplifies upgrades and many other jail related
> tasks. EZJail is an awesome addition to Jails and you will feel almost
> like in VMWare. For example, I routinely archive and move jails around
> my servers! (so long as you keep all your servers up to date) So with
> EZJail it's almost like using VMWare, if not better. No GUI though ;-)
> > What type of services CAN be run from within a jail?
> >
> Basically anything. AFAIK
> Best,
> Alejandro Imass
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