Everyone, I am in the initial study phase of putting together a larger virtual server while using Centos 7.5 as the operating system of choice for the ?individual virtual machines. How do you all like VMware for this, or what other software allows for the development of virtural servers that use Centos 7.5 Thanks ahead of time for giving me a head start with your experiences!!!! --? Greg Ennis
Hi Greg here, I use Virtualbox for the following VMs: - Centos 7.5 - Fedora 28 - Windows 10 - Windows 7 - Windows XP and no problem sofar (cross fingers). I download VirtualBox directly from http://www.oracle.com/technetwork/server-storage/virtualbox/downloads/index.html That is, I don't use any Virtualbox package offerd by any of the repos. suomi On 06/28/2018 11:03 PM, Gregory P. Ennis wrote:> Everyone, > > I am in the initial study phase of putting together a larger virtual > server while using Centos 7.5 as the operating system of choice for the > ?individual virtual machines. > > How do you all like VMware for this, or what other software allows for > the development of virtural servers that use Centos 7.5 > > Thanks ahead of time for giving me a head start with your > experiences!!!! > > -- > Greg Ennis > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos >
On 06/28/2018 02:03 PM, Gregory P. Ennis wrote:> Everyone, > > I am in the initial study phase of putting together a larger virtual > server while using Centos 7.5 as the operating system of choice for the > ?individual virtual machines. > > How do you all like VMware for this, or what other software allows for > the development of virtural servers that use Centos 7.5 > > Thanks ahead of time for giving me a head start with your > experiences!!!! >It would be helpful if you gave more details about what you were looking for?? Are you planning to run a bare metal hypervisor, or vmware under Linux or windows?? What are you performance requirements?? IO? CPU? What will the VM's be used for?? Do guests requre a graphics console? Various vmware products ranging from ESXI to vmware workstation are very popular. I've run several of them. They work.? I now use the Linux included, kvm/qemu based Red Hat/CentOS virtualization and it meets my needs very well for general testing/development, email server, web server kind of stuff.? I also use this setup along with spice to run test systems with various graphic GUI's.? I would not say that my virt servers are very heavily loaded.? I have a Dell R210 running CentOS6 KVM/Qemu and a Dell XPS 9360 running Ubuntu 18.04 with kvm/qemu. If you prefer fancy mangement GUI's over writing scripts and editing config files, vmware might be better for you. kvm/qemu does include virt-manager which is a fairly simply GUI to create and manage VM's, but the user interface is not as comprehensive as the interface for managing ESXi. Red Hat does have their high end virtualization products, of which I believe at least 1 is a bare metal hypervisor.? I have no personal experience with those products, though if? client came to me with need, I would examine and seriously consider the Redhat products. One advantage to the kvm/qemu solution or possibly the redhat virtualization product is more integrated support.? When I ran vmware, I used to run into situations where I wanted to beta test the newest release of some random linux distribution only to find out that vmware had not yet implemented support for the graphics driver or some other new hardware feature being used in the OS that I was trying to test.? In this way, kvm/qemu feels more integrated.? Like other software, kvm/qemu has bugs here and there, but overall, I'm very happy with it and I like the price of using it under CentOS and Ubuntu. I see clients all the time, go out and spend a fortune on huge vmware clusters, that end up very lightly loaded and could easily be run on a simple kvm/qemu server running under CentOS (or even one of the desktop virtualization solutions) with a backup server for redundancy, so I suggest to consider what your requirements really are.? You could always go with Redhat if you require support. Nataraj
On 29/06/18 07:03, Gregory P. Ennis wrote:> Everyone, > > I am in the initial study phase of putting together a larger virtual > server while using Centos 7.5 as the operating system of choice for the > ?individual virtual machines. > > How do you all like VMware for this, or what other software allows for > the development of virtural servers that use Centos 7.5 > > Thanks ahead of time for giving me a head start with your > experiences!!!!We're using KVM/Qemu on CentOS 7. We changed away from VMware after a lot of trouble with poorly supported infiniband drivers (particularly for RDMA and especially SRP with multipathing to OpenIndiana based ZFS backend storage). Infiniband support on CentOS is mature and actively supported upstream. In comparison with VMware where we were left to manually install drivers available from OFED (a complete pain to do with every upgrade and left us with regular 'Purple Screens of Death'). KVM/Qemu + libvirt also gave us the ability to do live migrations without having to buy into a higher level of support on VMware. On the stack we run Windows Servers/Clients, Linux Servers (CentOS 5,6,7; Arch; Ubunutu). Virt-Manager allows reasonable graphical tools for management but there's so much you can do with scripting through virsh and generally with other OS tools (bash, python, etc.). I've recently dabbled with an old piece of hardware to implement a ZFS on Linux CentOS 7 KVM/Qemu host. This has worked really well but I haven't put any effort in to expanding the configuration to share storage via SRPt or iSCSI Targets even though these options are possible. Having made the jump from VMware to KVM/Qemu on CentOS 7, I wouldn't look back. Tom -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 181 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20180702/ed967288/attachment.sig>
On 06/28/2018 02:03 PM, Gregory P. Ennis wrote:> Everyone, > > I am in the initial study phase of putting together a larger virtual > server while using Centos 7.5 as the operating system of choice for > the > ?individual virtual machines. > > How do you all like VMware for this, or what other software allows > for > the development of virtural servers that use Centos 7.5 > > Thanks ahead of time for giving me a head start with your > experiences!!!! >It would be helpful if you gave more details about what you were looking for?? Are you planning to run a bare metal hypervisor, or vmware under Linux or windows?? What are you performance requirements?? IO? CPU? What will the VM's be used for?? Do guests requre a graphics console? Various vmware products ranging from ESXI to vmware workstation are very popular. I've run several of them. They work.? I now use the Linux included, kvm/qemu based Red Hat/CentOS virtualization and it meets my needs very well for general testing/development, email server, web server kind of stuff.? I also use this setup along with spice to run test systems with various graphic GUI's.? I would not say that my virt servers are very heavily loaded.? I have a Dell R210 running CentOS6 KVM/Qemu and a Dell XPS 9360 running Ubuntu 18.04 with kvm/qemu. If you prefer fancy mangement GUI's over writing scripts and editing config files, vmware might be better for you. kvm/qemu does include virt-manager which is a fairly simply GUI to create and manage VM's, but the user interface is not as comprehensive as the interface for managing ESXi. Red Hat does have their high end virtualization products, of which I believe at least 1 is a bare metal hypervisor.? I have no personal experience with those products, though if? client came to me with need, I would examine and seriously consider the Redhat products. One advantage to the kvm/qemu solution or possibly the redhat virtualization product is more integrated support.? When I ran vmware, I used to run into situations where I wanted to beta test the newest release of some random linux distribution only to find out that vmware had not yet implemented support for the graphics driver or some other new hardware feature being used in the OS that I was trying to test.? In this way, kvm/qemu feels more integrated.? Like other software, kvm/qemu has bugs here and there, but overall, I'm very happy with it and I like the price of using it under CentOS and Ubuntu. I see clients all the time, go out and spend a fortune on huge vmware clusters, that end up very lightly loaded and could easily be run on a simple kvm/qemu server running under CentOS (or even one of the desktop virtualization solutions) with a backup server for redundancy, so I suggest to consider what your requirements really are.? You could always go with Redhat if you require support. Nataraj --------------------------------------------------------- Nataraj, Thank you very much for your comments. I have not put together a virtual machine at this point, so my tree structure of logic is still very weak. However, I have three Centos 7.5 machines and one Centos 5.10 that could reasonably function together. ? Actually the plan has been to upgrade the Centos 5.10 which is a database server to Centos 7.5. Currently this is on a SuperMicro SCSI and we planned to purchase a new machine with SATA drives because 7.5 does not install on SCSI drives. While planning for this change we thought of looking a virtual systems on one larger unit. The other units that are already running 7.5 are a mail/archive server, a gateway that controls all of the traffic in and out of the network, and a backup server. These units service about 30 users, and all machines have heavy use :) (ok at least by my standards). Thank you again for your recommendations!!!!! Greg
On 29/06/18 07:03, Gregory P. Ennis wrote:> Everyone, > > I am in the initial study phase of putting together a larger virtual > server while using Centos 7.5 as the operating system of choice for > the > ?individual virtual machines. > > How do you all like VMware for this, or what other software allows > for > the development of virtural servers that use Centos 7.5 > > Thanks ahead of time for giving me a head start with your > experiences!!!!We're using KVM/Qemu on CentOS 7. We changed away from VMware after a lot of trouble with poorly supported infiniband drivers (particularly for RDMA and especially SRP with multipathing to OpenIndiana based ZFS backend storage). Infiniband support on CentOS is mature and actively supported upstream. In comparison with VMware where we were left to manually install drivers available from OFED (a complete pain to do with every upgrade and left us with regular 'Purple Screens of Death'). KVM/Qemu + libvirt also gave us the ability to do live migrations without having to buy into a higher level of support on VMware. On the stack we run Windows Servers/Clients, Linux Servers (CentOS 5,6,7; Arch; Ubunutu). Virt-Manager allows reasonable graphical tools for management but there's so much you can do with scripting through virsh and generally with other OS tools (bash, python, etc.). I've recently dabbled with an old piece of hardware to implement a ZFS on Linux CentOS 7 KVM/Qemu host. This has worked really well but I haven't put any effort in to expanding the configuration to share storage via SRPt or iSCSI Targets even though these options are possible. Having made the jump from VMware to KVM/Qemu on CentOS 7, I wouldn't look back. Tom ----------------------------------------------------------------- Tom, That is very helpful. Thank you very much for such a full response!!! I will take a look at KVM/Qem Greg