On 4/29/15 10:33 , Joe Landman wrote: > On 04/29/2015 01:27 PM, Robert Mustacchi wrote: >> On 4/29/15 10:24 , Joe Landman wrote: > > [...] > >>> This gets to another question: if an LX branded zone crashes (I've not >>> played with them much other than lighting a few up to play), can we turn >>> them off from the GZ, or do we need to reboot the whole machine? I >>> don't mind so much forcing the unmounting of the data set (zfs file >>> system), as most of the caching for the branded zone would be on SmartOS >>> anyway; e.g. we wouldn't have to worry about most of these: >> >> What does it mean for a zone to crash? Linux's init process dies? The >> applications you care about inside of it crash? The host panics? >> Something else? > > I am more worried about init process dying, or the zone "panic" than > anything else. If the application dies, I can do a simple restart, and > easily handle monitoring/controlling that. > > I want to understand if the LX zone is better for this application than > running this as a KVM. I am concerned about storage IO and network > bandwidth, so I was hoping to avoid going through the emulation/KVM > layer. We are looking to the LX branded zone as a way around that, > quite cognizant of the potential risks. > > KVM is better for isolation, and I've had little trouble rebooting > panic'ed Linux VMs in the past. I don't have nearly as much operational > experience with the LX branded zones, and while they are very intriguing > as a way to avoid the KVM, they may simply not be the right approach.
There's no notion of a panic for a zone as its kernel is the same as the hosts. If the Linux init process dies, the zone is restarted to simulate a Linux kernel panic, note this is different from a traditional zone, where the kernel just restarts init. You can certainly stop, start, and restart it, the same way that you would a KVM instance. In general, I'm not sure of any cases where I personally would want to use KVM if an lx brand worked and had the functionality I needed. Robert ------------------------------------------- smartos-discuss Archives: https://www.listbox.com/member/archive/184463/=now RSS Feed: https://www.listbox.com/member/archive/rss/184463/25769125-55cfbc00 Modify Your Subscription: https://www.listbox.com/member/?member_id=25769125&id_secret=25769125-7688e9fb Powered by Listbox: http://www.listbox.com
