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    Building Out XenServer 6.5 with USB Boot and Software RAID 10

    IT Discussion
    xen virtualization xenserver xenserver 6.5 how to
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    • RomoR
      Romo
      last edited by

      @scottalanmiller remeber to change the line that targets devices sd[a-d] to sd[b-e],

      There is also a typo in the last line,
      device-config:device=/dev/md10 should be /dev/md0 following that guide

      DustinB3403D 1 Reply Last reply Reply Quote 0
      • DustinB3403D
        DustinB3403 @Romo
        last edited by

        @Romo The typo's have been addressed.

        RomoR 1 Reply Last reply Reply Quote 0
        • RomoR
          Romo @DustinB3403
          last edited by

          @DustinB3403 said:

          @Romo The typo's have been addressed.

          Great, this way more people can follow the guide 😃

          1 Reply Last reply Reply Quote 0
          • DustinB3403D
            DustinB3403
            last edited by

            We should probably make a topic on building an off-host ISO and backup target server to complement this guide here.

            Since we've already gone full tilt with the USB mdadm RAID 10....

            scottalanmillerS 1 Reply Last reply Reply Quote 1
            • scottalanmillerS
              scottalanmiller @DustinB3403
              last edited by

              @DustinB3403 said:

              We should probably make a topic on building an off-host ISO and backup target server to complement this guide here.

              Since we've already gone full tilt with the USB mdadm RAID 10....

              Agreed.

              1 Reply Last reply Reply Quote 0
              • DustinB3403D
                DustinB3403
                last edited by

                I'm build a XenServer right now on laptop hard drives, using this guide.

                So it'll tie in well with Virtualize everything.

                Scott would you start a new topic with the basics of "why everything should be virtual" reference this topic, and what the "second server" will be for.

                1 Reply Last reply Reply Quote 0
                • DustinB3403D
                  DustinB3403
                  last edited by

                  I wonder if it's possible to put this into a executable script that could just be downloaded, and run.

                  scottalanmillerS 1 Reply Last reply Reply Quote 0
                  • scottalanmillerS
                    scottalanmiller @DustinB3403
                    last edited by

                    @DustinB3403 said:

                    I wonder if it's possible to put this into a executable script that could just be downloaded, and run.

                    Yes it could, that's part of the goal. We want to be able to fully automate this. In the long run you will likely want a prompt that will ask which devices to add to the array and after that it could do everything on its own.

                    1 Reply Last reply Reply Quote 0
                    • stacksofplatesS
                      stacksofplates
                      last edited by

                      What kind of impact does log writing have on the USB? Is that worth a concern at all?

                      scottalanmillerS 1 Reply Last reply Reply Quote 0
                      • DustinB3403D
                        DustinB3403
                        last edited by DustinB3403

                        It could be a concern, especially if you are producing a ton of logs.

                        But with the second server, you could point your logs to that server.

                        So your compute servers don't ever have to deal with a full Dom0 because of logging.

                        The backup USB is also there in-case it gets burnt out.

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

                          @DustinB3403 said:

                          It could be a concern, especially if you are producing a ton of logs.

                          But with the second server, you could point your logs to that server.

                          So your compute servers don't ever have to deal with a full Dom0 because of logging.

                          The backup USB is also there in-case it gets burnt out.

                          I wonder if there is a way to make most/all of it run in RAM like with VMware?

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                          • DustinB3403D
                            DustinB3403
                            last edited by

                            There might be, but why? You want your RAM for your VM's.

                            Just use the built in redirection to push it to an off-host server or a dedicated folder.

                            stacksofplatesS 1 Reply Last reply Reply Quote 0
                            • scottalanmillerS
                              scottalanmiller @stacksofplates
                              last edited by

                              @johnhooks said:

                              What kind of impact does log writing have on the USB? Is that worth a concern at all?

                              It wears it out, send that to Loggly or ELK.

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

                                @DustinB3403 said:

                                There might be, but why? You want your RAM for your VM's.

                                Just use the built in redirection to push it to an off-host server or a dedicated folder.

                                I was just thinking, it already takes up 1GB, if you could have it only take up a small amount and store it in RAM, it might be a help.

                                1 Reply Last reply Reply Quote 0
                                • DustinB3403D
                                  DustinB3403
                                  last edited by

                                  The issue is that logging on XenServer doesn't just stop. So Maintenance is critical.

                                  You don't want to auto-dump your logs, you might have issues that you want to look into to. So keeping them around somewhere is critical.

                                  stacksofplatesS 1 Reply Last reply Reply Quote 0
                                  • stacksofplatesS
                                    stacksofplates @DustinB3403
                                    last edited by stacksofplates

                                    @DustinB3403 said:

                                    The issue is that logging on XenServer doesn't just stop. So Maintenance is critical.

                                    You don't want to auto-dump your logs, you might have issues that you want to look into to. So keeping them around somewhere is critical.

                                    Oh I wasn't saying to stop logging, I just wondered if it was a possibility to run it in RAM. More of just an inquisitive qustion.

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                                    • scottalanmillerS
                                      scottalanmiller
                                      last edited by

                                      You CAN run in RAM. But why? If anything happens the logs vanish. And it uses up memory too, but not normally all that much. But will you have it auto-rotate in some way?

                                      stacksofplatesS 1 Reply Last reply Reply Quote 0
                                      • DustinB3403D
                                        DustinB3403
                                        last edited by

                                        Completing the Resync process takes a very long time.....

                                        1 Reply Last reply Reply Quote 0
                                        • scottalanmillerS
                                          scottalanmiller
                                          last edited by

                                          It'll do that 🙂

                                          1 Reply Last reply Reply Quote 0
                                          • stacksofplatesS
                                            stacksofplates @scottalanmiller
                                            last edited by

                                            @scottalanmiller said:

                                            You CAN run in RAM. But why? If anything happens the logs vanish. And it uses up memory too, but not normally all that much. But will you have it auto-rotate in some way?

                                            I was just wondering if it's possible to do it similarly to VMware. It was more of just a question for questions sake. XenServer already takes up a gig of ram so the rest couldn't be that much. And you could send the logs somewhere else like you mentioned. It was more of just a question to see if it was possible.

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