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    Testing oVirt...

    IT Discussion
    ovirt supermicro red hat virtualization kvm gluster hyperconverged centos7
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    • F
      FATeknollogee
      last edited by

      oVirt Node v4.3 (based on Fedora 28) - this is pre-release:

      0_1533637604798_gluster_deployment.png

      0_1533637615089_step2_fqdns.png

      0_1533637623806_step3_packages.png

      0_1533637637986_step4_volumes.png

      0_1533637646286_step5_bricks.png

      0_1533637654853_step5_bricks_2.png

      0_1533637662108_step6_review.png

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      • D
        DustinB3403
        last edited by

        So you're saying ovirt is pushing the Xen guys to get into gear as this appears to be the entire package, with FOSS.

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        • F
          FATeknollogee @DustinB3403
          last edited by FATeknollogee

          @dustinb3403 said in Testing oVirt...:

          So you're saying ovirt is pushing the Xen guys to get into gear as this appears to be the entire package, with FOSS.

          I believe oVirt is being billed as "vSphere for FOSS"

          You're probably not going to move the Xen/XS/XCP-ng guys off their spot.

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          • D
            dafyre
            last edited by

            Can we use the oVirt system to manage an existing KVM server?
            ( I want to try oVirt, but really don't want to wipe out the system I currently have set up )

            D F 2 Replies Last reply Reply Quote 1
            • D
              DustinB3403 @dafyre
              last edited by

              @dafyre said in Testing oVirt...:

              Can we use the oVirt system to manage an existing KVM server?
              ( I want to try oVirt, but really don't want to wipe out the system I currently have set up )

              I tried setting up oVirt a few versions ago and from what I could find, it's almost expected you have a minimum of 3 physical hosts for it.

              So no, you won't be able to manage a standalone KVM server since everything has to get built to be managed by the oVirt Engine.

              F 1 Reply Last reply Reply Quote 4
              • F
                FATeknollogee @dafyre
                last edited by

                @dafyre said in Testing oVirt...:

                Can we use the oVirt system to manage an existing KVM server?
                ( I want to try oVirt, but really don't want to wipe out the system I currently have set up )

                Unfortunately not.

                1 Reply Last reply Reply Quote 1
                • E
                  Emad R @FATeknollogee
                  last edited by

                  @fateknollogee

                  Let us talk about Gluster, how do you feel safe with it ?

                  saw you choose an option with RAID 6, i dont get that cause from my trial, I make RAID and group disks then create Gluster volume from those mdraid volume, but it seems you did RAID 6 afterwards, hmm whats the logic behind that ?

                  What type of Gluster volume are you using, just distributed ?

                  I m still learning HCI so thus the beginner vibe

                  F T S 5 Replies Last reply Reply Quote 0
                  • E
                    Emad R @Francesco Provino
                    last edited by

                    @francesco-provino said in Testing oVirt...:

                    Any real advantage vs plain KVM?

                    Scaling KVM basically, if you have 1 or 2 KVM servers thats fine, but if you want more you need better management that logging in each one.

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                    • F
                      FATeknollogee @Emad R
                      last edited by

                      @emad-r said in Testing oVirt...:

                      @fateknollogee

                      Let us talk about Gluster, how do you feel safe with it ?

                      saw you choose an option with RAID 6, i dont get that cause from my trial, I make RAID and group disks then create Gluster volume from those mdraid volume, but it seems you did RAID 6 afterwards, hmm whats the logic behind that ?

                      What type of Gluster volume are you using, just distributed ?

                      I m still learning HCI so thus the beginner vibe

                      No RAID6, I'm using RAID10.

                      Gluster volume is Replicate + Arbiter

                      This is a good blog post to get you started: https://www.ovirt.org/blog/2018/02/up-and-running-with-ovirt-4-2-and-gluster-storage/

                      1 Reply Last reply Reply Quote 1
                      • F
                        FATeknollogee @DustinB3403
                        last edited by

                        @dustinb3403 said in Testing oVirt...:

                        @dafyre said in Testing oVirt...:

                        Can we use the oVirt system to manage an existing KVM server?
                        ( I want to try oVirt, but really don't want to wipe out the system I currently have set up )

                        I tried setting up oVirt a few versions ago and from what I could find, it's almost expected you have a minimum of 3 physical hosts for it.

                        So no, you won't be able to manage a standalone KVM server since everything has to get built to be managed by the oVirt Engine.

                        You can now do a single host w Gluster:
                        https://www.ovirt.org/documentation/gluster-hyperconverged/chap-Single_node_hyperconverged/

                        Here's a screenshot of my single node install:
                        0_1533646725168_screenshot_27.png

                        1 Reply Last reply Reply Quote 1
                        • F
                          FATeknollogee @Emad R
                          last edited by

                          @emad-r said in Testing oVirt...:

                          @fateknollogee

                          Let us talk about Gluster, how do you feel safe with it ?

                          Not sure, since I'm new to the whole Gluster concept.

                          saw you choose an option with RAID 6, i dont get that cause from my trial, I make RAID and group disks then create Gluster volume from those mdraid volume, but it seems you did RAID 6 afterwards, hmm whats the logic behind that ?

                          Hardware RAID is recommended instead of MDADM.

                          D S 2 Replies Last reply Reply Quote 0
                          • D
                            DustinB3403 @FATeknollogee
                            last edited by

                            @fateknollogee Hardware RAID is recommended because a lot of people lack the practice and skill with software RAID to appropriately maintain/troubleshoot/fix software raid.

                            Plus you often get features like Blind swap.

                            F 1 Reply Last reply Reply Quote 1
                            • F
                              FATeknollogee @DustinB3403
                              last edited by

                              @dustinb3403 said in Testing oVirt...:

                              @fateknollogee Hardware RAID is recommended because a lot of people lack the practice and skill with software RAID to appropriately maintain/troubleshoot/fix software raid.

                              Plus you often get features like Blind swap.

                              Nope...
                              The folks at RH say, currently, performance is better with HW RAID & that is how most of their testing/validation is done.

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                              • D
                                DustinB3403 @FATeknollogee
                                last edited by

                                @fateknollogee said in Testing oVirt...:

                                @dustinb3403 said in Testing oVirt...:

                                @fateknollogee Hardware RAID is recommended because a lot of people lack the practice and skill with software RAID to appropriately maintain/troubleshoot/fix software raid.

                                Plus you often get features like Blind swap.

                                Nope...
                                The folks at RH say, currently, performance is better with HW RAID & that is how most of their testing/validation is done.

                                That's odd, but okay. I would generally think they make the recommendation because they know there is a huge lack of understanding on how software raid needs to be managed.

                                stacksofplatesS 1 Reply Last reply Reply Quote 0
                                • T
                                  travisdh1 @Emad R
                                  last edited by travisdh1

                                  @emad-r said in Testing oVirt...:

                                  @fateknollogee

                                  Let us talk about Gluster, how do you feel safe with it ?

                                  I'm guessing you really don't know much about Gluster and it's history?
                                  https://en.m.wikipedia.org/wiki/Gluster

                                  Think of it like RAID, but spread over a network instead of locally. It's been around since 2005, and is used by some very large cloud providers today.

                                  So I feel totally safe with it, and actually deployed it once. Great platform when it's needed, and a complete waste of time when it's not.

                                  D S 2 Replies Last reply Reply Quote 1
                                  • D
                                    dafyre @travisdh1
                                    last edited by

                                    @travisdh1 said in Testing oVirt...:

                                    @emad-r said in Testing oVirt...:

                                    @fateknollogee

                                    Let us talk about Gluster, how do you feel safe with it ?

                                    I'm guessing you really don't know much about Gluster and it's history?
                                    https://en.m.wikipedia.org/wiki/Gluster

                                    Think of it like RAID, but spread over a network instead of locally. It's been around since 2005, and is used by some very large cloud providers today.

                                    So I feel totally safe with it, and actually deployed it once. Great platform when it's needed, and a complete waste of time when it's not.

                                    That and Gluster is not a replacement for good backups. 😄

                                    1 Reply Last reply Reply Quote 1
                                    • stacksofplatesS
                                      stacksofplates @DustinB3403
                                      last edited by

                                      @dustinb3403 said in Testing oVirt...:

                                      @fateknollogee said in Testing oVirt...:

                                      @dustinb3403 said in Testing oVirt...:

                                      @fateknollogee Hardware RAID is recommended because a lot of people lack the practice and skill with software RAID to appropriately maintain/troubleshoot/fix software raid.

                                      Plus you often get features like Blind swap.

                                      Nope...
                                      The folks at RH say, currently, performance is better with HW RAID & that is how most of their testing/validation is done.

                                      That's odd, but okay. I would generally think they make the recommendation because they know there is a huge lack of understanding on how software raid needs to be managed.

                                      I'm also guessing it's because RAID isn't necessarily needed. The overhead for software RAID doesn't gain much if you're bricks are replicated anyway.

                                      S 1 Reply Last reply Reply Quote 1
                                      • F
                                        FATeknollogee
                                        last edited by

                                        3 + 1 node hyperconverged: Volume layout

                                        0_1533667561288_screenshot_28.png

                                        1 Reply Last reply Reply Quote 1
                                        • F
                                          FATeknollogee
                                          last edited by

                                          3 + 1 node hyperconverged: brick layout

                                          0_1533667635509_screenshot_29.png

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                                          • scottalanmillerS
                                            scottalanmiller @Emad R
                                            last edited by

                                            @emad-r said in Testing oVirt...:

                                            @fateknollogee

                                            Let us talk about Gluster, how do you feel safe with it ?

                                            It's the industry standard RAIN system.

                                            1 Reply Last reply Reply Quote 1
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