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    pfSense 2.6 problem with zombie processes

    Scheduled Pinned Locked Moved General pfSense Questions
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    • N
      netblues @gofaizen
      last edited by

      @gofaizen said in pfSense 2.6 problem with zombie processes:

      qemu_guest_agent_flags="-d -v -m virtio-serial -l /var/log/qemu-ga.log -p /dev/ttyV0.2"

      Where did you get this?

      gofaizenG 1 Reply Last reply Reply Quote 0
      • gofaizenG
        gofaizen @netblues
        last edited by

        @netblues I have the same

        1 Reply Last reply Reply Quote 0
        • gofaizenG
          gofaizen @netblues
          last edited by

          @netblues This is command line from linux.
          I have tried qemu_guest_agent_flags="-d -v -l /var/log/qemu-ga.log" and qemu_guest_agent_flags="-d -v -m virtio-serial -l /var/log/qemu-ga.log -p /dev/ttyV0.2"
          Same effect - zombie process every minute

          N 1 Reply Last reply Reply Quote 0
          • N
            netblues @gofaizen
            last edited by

            @gofaizen said in pfSense 2.6 problem with zombie processes:

            @netblues This is command line from linux.
            I have tried qemu_guest_agent_flags="-d -v -l /var/log/qemu-ga.log" and qemu_guest_agent_flags="-d -v -m virtio-serial -l /var/log/qemu-ga.log -p /dev/ttyV0.2"
            Same effect - zombie process every minute

            There is no -p /dev/ttyV0.2 in my config.

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            • stephenw10S
              stephenw10 Netgate Administrator
              last edited by

              Hmm, it's unclear which of those things is a symptom.
              Is the widget throwing that error because qemuguest is continually trying to access the disk?
              Or is the agent unable to read the disk status because the widget is doping somthing wrong?
              Or maybe both are failing because of some other issue.

              If you disable the qemu agent do you still see the php error from the widget?

              Steve

              gofaizenG 1 Reply Last reply Reply Quote 0
              • gofaizenG
                gofaizen @stephenw10
                last edited by

                @stephenw10
                Widget throws error in random order.
                Error in widget and qemu-guest-agent not in any connect. When I disable qemu-guest-agent widget continues throwing errors in random order. It can work whole day in normal mode, or can throw error every 10 minutes. And it throws error every time after reboot.
                qemu-guest-agent make zombie every time after getting data: {"execute":"guest-get-fsinfo"} message from oVirt.

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                • stephenw10S
                  stephenw10 Netgate Administrator
                  last edited by

                  Hmm, well that sounds more like both things are failing because of something else preventing access to the filesystem.

                  If you run /bin/df -hT manually at the command line repeatedly does it ever fail?

                  Can we see the output of: /bin/df -hT --libxo=json
                  Though that too might need to be run until it fails. That's what the widget is trying to do and choking on the output.

                  Steve

                  gofaizenG 1 Reply Last reply Reply Quote 0
                  • gofaizenG
                    gofaizen @stephenw10
                    last edited by gofaizen

                    @stephenw10 Yes, I can run df -hT manually. I have checked this in first order.
                    ": [{"name":"/dev/ufsid/60618bb1ebc69388","type":"ufs ","blocks":"5.5G","used":"2.0G","available":"3.1G","used-percent":39,"mounted-on":"/"}, {"name":"devfs","type":"devfs","blocks":"1.0K","used":"1.0K","available":"0B","used-percent":100,"mounted-on":"/dev"}, {"name":"tmpfs","type":"tmpfs","blocks":"4.0M","used":"152K","available":"3.9M","used-percent":4,"mounted-on":"/var/run"}, {"name":"devfs","type":"devfs","blocks":"1.0K","used":"1.0K","available":"0B","used-percent":100,"mounted-on":"/var/dhcpd/dev"}]}

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                    • stephenw10S
                      stephenw10 Netgate Administrator
                      last edited by stephenw10

                      But if you run /bin/df -hT manually at the command line repeatedly does it ever fail? Like after 100 tries?
                      It will likely only fails as often as the widget does. Or if you happen to run it when the qemu agent is trying to access the filesystem also.

                      The JSON output there seems to be missing the initial terms. I expect it to read like:

                      [22.05-DEVELOPMENT][admin@plusdev-2.stevew.lan]/root: /bin/df -hT --libxo=json
                      {"storage-system-information": {"filesystem": [{"name":"/dev/ufsid/626069f74a9f0e6e","type":"ufs  ","blocks":"9.2G","used":"1.5G","available":"7.0G","used-percent":18,"mounted-on":"/"}, {"name":"devfs","type":"devfs","blocks":"1.0K","used":"1.0K","available":"0B","used-percent":100,"mounted-on":"/dev"}, {"name":"tmpfs","type":"tmpfs","blocks":"4.0M","used":"112K","available":"3.9M","used-percent":3,"mounted-on":"/var/run"}, {"name":"devfs","type":"devfs","blocks":"1.0K","used":"1.0K","available":"0B","used-percent":100,"mounted-on":"/var/dhcpd/dev"}]}
                      }
                      

                      Steve

                      gofaizenG 1 Reply Last reply Reply Quote 0
                      • gofaizenG
                        gofaizen @stephenw10
                        last edited by gofaizen

                        @stephenw10
                        {"storage-system-information": {"filesystem": [{"name":"/dev/ufsid/60618bb1ebc69388","type":"ufs ","blocks":"5.5G","used":"2.0G","available":"3.1G","used-percent":39,"mounted-on":"/"}, {"name":"devfs","type":"devfs","blocks":"1.0K","used":"1.0K","available":"0B","used-percent":100,"mounted-on":"/dev"}, {"name":"tmpfs","type":"tmpfs","blocks":"4.0M","used":"152K","available":"3.9M","used-percent":4,"mounted-on":"/var/run"}, {"name":"devfs","type":"devfs","blocks":"1.0K","used":"1.0K","available":"0B","used-percent":100,"mounted-on":"/var/dhcpd/dev"}]}
                        }
                        Possibly I have copied part of output.

                        Tried to run /bin/df -hT --libxo=json in loop 1000 times. All times were successful.

                        #!/bin/sh

                        for i in seq 1 1000
                        do
                        /bin/df -hT --libxo=json
                        done

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                        • stephenw10S
                          stephenw10 Netgate Administrator
                          last edited by

                          Hmm. If you remove the qemu-agent can I assume this goes away?

                          gofaizenG 1 Reply Last reply Reply Quote 0
                          • gofaizenG
                            gofaizen @stephenw10
                            last edited by

                            @stephenw10
                            When I stopped qemu-ga service zombie processes died.
                            I have checked it several times. But I need qemu-ga in my oVirt installation.

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                            • stephenw10S
                              stephenw10 Netgate Administrator
                              last edited by

                              Hmm, well can you configure it not to query the disk status? I would assume that also solves it.

                              Can you test qemu-agent in a FreeBSD 12.3 install? Hard to see what but it might be something in base that's changed.

                              Steve

                              gofaizenG 2 Replies Last reply Reply Quote 0
                              • gofaizenG
                                gofaizen @stephenw10
                                last edited by

                                @stephenw10
                                I am trying to disable query for file system status in qemu-ga.

                                1 Reply Last reply Reply Quote 0
                                • gofaizenG
                                  gofaizen @stephenw10
                                  last edited by

                                  @stephenw10
                                  With this parameters -d -v -l /var/log/qemu-ga.log -b "guest-get-fsinfo" qemu-ga does not generate zombies.
                                  -b "guest-get-fsinfo" - means - blacklist guest-get-fsinfo command

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                                  • stephenw10S
                                    stephenw10 Netgate Administrator
                                    last edited by

                                    Mmm, OK. And does that still provide the info you need?

                                    gofaizenG 1 Reply Last reply Reply Quote 0
                                    • gofaizenG
                                      gofaizen @stephenw10
                                      last edited by

                                      @stephenw10
                                      qemu-ga provides information about interfaces, logged in users and fqdn. I cant see information about guest agent version, OS, timezone, architecture and file systems (i have disabled file system info by myself).

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                                      • stephenw10S
                                        stephenw10 Netgate Administrator
                                        last edited by

                                        And that's sufficient?

                                        gofaizenG 1 Reply Last reply Reply Quote 0
                                        • gofaizenG
                                          gofaizen @stephenw10
                                          last edited by gofaizen

                                          @stephenw10
                                          I would like to get all info from qemu-ga. Like from Linux VM.
                                          FreeBSD qemu-ga has strange behavior - in default config (when -m is not present) I see method - isa-serial. But in VM config - virtio-serial. And when I set virtio-serial in qemu-ga config, qemu-ga can't get any request from oVirt.

                                          qemu-ga -d -v -l /var/log/qemu-ga.log -m virtio-serial - does not work
                                          qemu-ga -d -v -l /var/log/qemu-ga.log - works with some restrictions in info

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                                          • stephenw10S
                                            stephenw10 Netgate Administrator
                                            last edited by

                                            Ok, the next thing I would test here is whether it works as expected in FreeBSD 12.3.
                                            Is this an upstream regression or something we are doing in pfSense specifically.

                                            Steve

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