1. I have read that System VM-s can't run on RBD. But the information was rather old (for Ceph 0.58) is it still valid for ACS 4.3 and Ceph 0.80.4 ?? 2. When I run cloud configuration wizard just after CS install - it does not have "RBD" type for primary storage in drop-down list. But when I launch "Add primary storage" After Zone is configured and Pod/Cluster is defined -- I can see RBD type. A bit confused why so?
Vadim. -----Original Message----- From: Gerolamo Valcamonica [mailto:gerol...@pyder.com] Sent: Monday, July 28, 2014 3:15 PM To: users@cloudstack.apache.org Subject: Re: Ceph as primary storage at CS 4.3 Il 28/07/2014 08:43, Vadim Kimlaychuk ha scritto: > I have a fresh install of CS4.3 and going to configure Ceph RBD device as > primary storage. I can’t see this type at drop-down list (only nfs, clvm and > shared mountpoint are available). I use CS 4.3 on KVM and Ceph. No problem with ceph, but I upgraded from 4.1 to 4.3, so, sorry, I've no answer for this. > Do I need to install libvirt on managment servers as well ? > Will it be a problem to work with different versions of libvirt > (ubuntu 12 and 14 have different) ? > Yes there will be. I updated hosts from Ubuntu 13.04 (libvirt 1.0.2) to 14.04 libvirt (1.2.2) and, when in mixed environment, i had this issues: 1- User VM on 13.04 hosts migrated to 14.04 hosts with a failure rate of about 5%. In case of failure, the result was a crash of the VM, kernel panic, and need to stop and start the VM from Cloudstack. 1a- In some cases (another 5%, more or less) the issue was a loss of connectivity from and to VMs. Network restarting inside the VM had no results and the solution was a VM reboot from Cloudstack 2- Users VM on 14.04 hosts didn't migrate to 13.04 hosts and resulted in an error like this: """ Unable to migrate due to internal error process exited while connecting to monitor: W: kvm binary is deprecated, please use qemu-system-x86_64 instead Supported machines are: none empty machine pc Standard PC (i440FX + PIIX, 1996) (alias of pc-i440fx-1.4) pc-i440fx-1.4 Standard PC (i440FX + PIIX, 1996) default) pc-1.3 Standard PC pc-1.2 Standard PC pc-1.1 Standard PC pc-1.0 Standard PC pc-0.15 Standard PC pc-0.14 Standard PC pc-0.13 Standard PC pc-0.12 Standard PC pc-0.11 Standard PC, qemu 0.11 pc-0.10 Standard PC, qemu 0.10 isapc ISA-only PC xenfv Xen Fully-virtualized PC q35 Standard PC (Q35 + ICH9, 2009) (alias of pc-q35-1.4) pc-q35-1.4 Standard PC (Q35 + ICH9, 2009) xenpv Xen Para-virtualized PC """ 3 - Most of System VM hanged or went to panic during migration from 13.04 to 14.04 hosts. In one case, migrating a Virtual Router resulted in lost of connectivity from and to VMs connected to that router. I stopped and started all migrated System VM / Virtual router to avoid further issues. 4- Once all hosts was migrated to 14.04, no additional issues resulted to me. Hope this helps -- Gerolamo Valcamonica
