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    KVM - Virt-Manager on a Separate VM

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    kvm beginner learning lab
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    • J
      JaredBusch
      last edited by

      @DustinB3403

      I use my user in the libvirt group so I do not have to bother with the root user.

      gpasswd -a jbusch libvirt
      

      Then this works.
      0_1512760351248_a5ddf1f5-ef56-46e1-b1a7-f9593c68a19c-image.png

      S M D 3 Replies Last reply Reply Quote 4
      • S
        scottalanmiller @Obsolesce
        last edited by

        @tim_g said in KVM - Virt-Manager on a Separate VM:

        When I try to do a ssh-copy-id to my servers, I get this:

        Permission denied (publickey,gssapi-keyex,gssapi-with-mic).
        

        This is expected, as I do not allow root logon, I do not allow password auth, and only allow RSA key based authentication.

        @stacksofplates said in KVM - Virt-Manager on a Separate VM:

        @tim_g said in KVM - Virt-Manager on a Separate VM:

        @stacksofplates said in KVM - Virt-Manager on a Separate VM:

        @tim_g said in KVM - Virt-Manager on a Separate VM:

        Wtf is going on here... everyone is making it so difficult... it's not!

        Step 1: On your KVM host, run the following command:
        ssh-keygen -t rsa -b 4096 -C "KVM01_Root_SSHKey"

        Step 2: On your desktop/vm used to manage the KVM host, run the following command:
        ssh-keygen -t rsa -b 4096 -C "PCName_userName_SSHKey"

        Step 3: On your desktop/VM, copy your public key:
        cat /home/username/.ssh/id_rsa.pub
        ...then copy it.

        Step 4: On your KVM Host, paste what you copy in Step 3 into the file here:
        vi /root/.ssh/authorized_keys
        ...then save the file.

        Step 5: On your desktop/VM using virt-manager, add the server like below... type in the host name then click connect.
        No password required.

        https://i.imgur.com/KkiIorg.png

        But see doing it this way has skipped a bunch of stuff that ssh-copy-id does. This will end up with more questions later on.

        I would be willing to be dollars to donuts if someone uses this they will have to change permissions on that authorized_keys file because it's not created by defualt.

        Seriously just generate the key (RSA is the default):

        ssh-keygen -b 4096
        

        and copy to the server:

        ssh-copy-id user@server
        

        Yes, but this assumes you've already got SSH going and unsecure enough to do a ssh-copy-id to the server. This isn't the case for me.

        But you are right, generally the ssh-copy-id is the way to go as I suppose I'm the only one here who does things securely, or this is done before securing SSH on the server.

        hahahahaha. Wtf are you talking about. What does "unsecure enough to do a ssh-copy-id" possibly mean?

        How did you get into that state? How do the initial keys get there?

        O 1 Reply Last reply Reply Quote 1
        • S
          stacksofplates @Obsolesce
          last edited by

          @tim_g said in KVM - Virt-Manager on a Separate VM:

          When I try to do a ssh-copy-id to my servers, I get this:

          Permission denied (publickey,gssapi-keyex,gssapi-with-mic).
          

          This is expected, as I do not allow root logon, I do not allow password auth, and only allow RSA key based authentication.

          Ok? We are talking about an initial hypervisor setup. Passwords are enabled by default. You copy your key, then shut the passwords off. Idk what the eff is going on here.....

          J 1 Reply Last reply Reply Quote 0
          • S
            stacksofplates @JaredBusch
            last edited by

            @jaredbusch said in KVM - Virt-Manager on a Separate VM:

            @DustinB3403

            I use my user in the libvirt group so I do not have to bother with the root user.

            gpasswd -a jbusch libvirt
            

            Then this works.
            0_1512760351248_a5ddf1f5-ef56-46e1-b1a7-f9593c68a19c-image.png

            Ya idk where the root thing came from.

            1 Reply Last reply Reply Quote 0
            • J
              JaredBusch @stacksofplates
              last edited by

              @stacksofplates said in KVM - Virt-Manager on a Separate VM:

              Idk what the eff is going on here.....

              Overcomplication of course.

              1 Reply Last reply Reply Quote 1
              • S
                stacksofplates @StorageNinja
                last edited by

                @storageninja said in KVM - Virt-Manager on a Separate VM:

                @stacksofplates I can break your 4096 bit encryption with $5.
                If your worried about state-level actors you have bigger concerns 🙂

                I'm not worried about anything. I'm not the one that said anything about key security

                1 Reply Last reply Reply Quote 0
                • O
                  Obsolesce @scottalanmiller
                  last edited by

                  @scottalanmiller said in KVM - Virt-Manager on a Separate VM:

                  @tim_g said in KVM - Virt-Manager on a Separate VM:

                  When I try to do a ssh-copy-id to my servers, I get this:

                  Permission denied (publickey,gssapi-keyex,gssapi-with-mic).
                  

                  This is expected, as I do not allow root logon, I do not allow password auth, and only allow RSA key based authentication.

                  @stacksofplates said in KVM - Virt-Manager on a Separate VM:

                  @tim_g said in KVM - Virt-Manager on a Separate VM:

                  @stacksofplates said in KVM - Virt-Manager on a Separate VM:

                  @tim_g said in KVM - Virt-Manager on a Separate VM:

                  Wtf is going on here... everyone is making it so difficult... it's not!

                  Step 1: On your KVM host, run the following command:
                  ssh-keygen -t rsa -b 4096 -C "KVM01_Root_SSHKey"

                  Step 2: On your desktop/vm used to manage the KVM host, run the following command:
                  ssh-keygen -t rsa -b 4096 -C "PCName_userName_SSHKey"

                  Step 3: On your desktop/VM, copy your public key:
                  cat /home/username/.ssh/id_rsa.pub
                  ...then copy it.

                  Step 4: On your KVM Host, paste what you copy in Step 3 into the file here:
                  vi /root/.ssh/authorized_keys
                  ...then save the file.

                  Step 5: On your desktop/VM using virt-manager, add the server like below... type in the host name then click connect.
                  No password required.

                  https://i.imgur.com/KkiIorg.png

                  But see doing it this way has skipped a bunch of stuff that ssh-copy-id does. This will end up with more questions later on.

                  I would be willing to be dollars to donuts if someone uses this they will have to change permissions on that authorized_keys file because it's not created by defualt.

                  Seriously just generate the key (RSA is the default):

                  ssh-keygen -b 4096
                  

                  and copy to the server:

                  ssh-copy-id user@server
                  

                  Yes, but this assumes you've already got SSH going and unsecure enough to do a ssh-copy-id to the server. This isn't the case for me.

                  But you are right, generally the ssh-copy-id is the way to go as I suppose I'm the only one here who does things securely, or this is done before securing SSH on the server.

                  hahahahaha. Wtf are you talking about. What does "unsecure enough to do a ssh-copy-id" possibly mean?

                  How did you get into that state? How do the initial keys get there?

                  Salt.

                  S 1 Reply Last reply Reply Quote 0
                  • M
                    mattbagan @JaredBusch
                    last edited by

                    @jaredbusch said in KVM - Virt-Manager on a Separate VM:

                    @DustinB3403

                    I use my user in the libvirt group so I do not have to bother with the root user.

                    gpasswd -a jbusch libvirt
                    

                    Then this works.
                    0_1512760351248_a5ddf1f5-ef56-46e1-b1a7-f9593c68a19c-image.png

                    Never tried it that way. I've always used:
                    usermod -a -G libvirt <username>

                    J 1 Reply Last reply Reply Quote 0
                    • S
                      stacksofplates @Obsolesce
                      last edited by

                      @tim_g said in KVM - Virt-Manager on a Separate VM:

                      @scottalanmiller said in KVM - Virt-Manager on a Separate VM:

                      @tim_g said in KVM - Virt-Manager on a Separate VM:

                      When I try to do a ssh-copy-id to my servers, I get this:

                      Permission denied (publickey,gssapi-keyex,gssapi-with-mic).
                      

                      This is expected, as I do not allow root logon, I do not allow password auth, and only allow RSA key based authentication.

                      @stacksofplates said in KVM - Virt-Manager on a Separate VM:

                      @tim_g said in KVM - Virt-Manager on a Separate VM:

                      @stacksofplates said in KVM - Virt-Manager on a Separate VM:

                      @tim_g said in KVM - Virt-Manager on a Separate VM:

                      Wtf is going on here... everyone is making it so difficult... it's not!

                      Step 1: On your KVM host, run the following command:
                      ssh-keygen -t rsa -b 4096 -C "KVM01_Root_SSHKey"

                      Step 2: On your desktop/vm used to manage the KVM host, run the following command:
                      ssh-keygen -t rsa -b 4096 -C "PCName_userName_SSHKey"

                      Step 3: On your desktop/VM, copy your public key:
                      cat /home/username/.ssh/id_rsa.pub
                      ...then copy it.

                      Step 4: On your KVM Host, paste what you copy in Step 3 into the file here:
                      vi /root/.ssh/authorized_keys
                      ...then save the file.

                      Step 5: On your desktop/VM using virt-manager, add the server like below... type in the host name then click connect.
                      No password required.

                      https://i.imgur.com/KkiIorg.png

                      But see doing it this way has skipped a bunch of stuff that ssh-copy-id does. This will end up with more questions later on.

                      I would be willing to be dollars to donuts if someone uses this they will have to change permissions on that authorized_keys file because it's not created by defualt.

                      Seriously just generate the key (RSA is the default):

                      ssh-keygen -b 4096
                      

                      and copy to the server:

                      ssh-copy-id user@server
                      

                      Yes, but this assumes you've already got SSH going and unsecure enough to do a ssh-copy-id to the server. This isn't the case for me.

                      But you are right, generally the ssh-copy-id is the way to go as I suppose I'm the only one here who does things securely, or this is done before securing SSH on the server.

                      hahahahaha. Wtf are you talking about. What does "unsecure enough to do a ssh-copy-id" possibly mean?

                      How did you get into that state? How do the initial keys get there?

                      Salt.

                      On a physical hypervisor initial install. How do you do that?

                      1 Reply Last reply Reply Quote 0
                      • J
                        JaredBusch @mattbagan
                        last edited by

                        @mattbagan said in KVM - Virt-Manager on a Separate VM:

                        Never tried it that way. I've always used:
                        usermod -a -G libvirt <username>

                        both ways get the same job done.

                        1 Reply Last reply Reply Quote 2
                        • S
                          StorageNinja Vendor @Obsolesce
                          last edited by StorageNinja

                          @tim_g said in KVM - Virt-Manager on a Separate VM:

                          @storageninja said in KVM - Virt-Manager on a Separate VM:

                          @stacksofplates I can break your 4096 bit encryption with $5.
                          If your worried about state-level actors you have bigger concerns 🙂

                          Challenge accepted.

                          Pst me your email and I'll give you a key to break.

                          Leave me an audit trail so I can confirm.

                          I assume you'll just ship me a beer and call it even?

                          https://imgs.xkcd.com/comics/security.png

                          O 1 Reply Last reply Reply Quote 2
                          • O
                            Obsolesce @StorageNinja
                            last edited by

                            @storageninja said in KVM - Virt-Manager on a Separate VM:

                            @tim_g said in KVM - Virt-Manager on a Separate VM:

                            @storageninja said in KVM - Virt-Manager on a Separate VM:

                            @stacksofplates I can break your 4096 bit encryption with $5.
                            If your worried about state-level actors you have bigger concerns 🙂

                            Challenge accepted.

                            Pst me your email and I'll give you a key to break.

                            Leave me an audit trail so I can confirm.

                            I assume you'll just ship me a beer and call it even?

                            https://imgs.xkcd.com/comics/security.png

                            Ha, sounds good.

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

                              Who spends $5 on a wrench?

                              travisdh1T O 2 Replies Last reply Reply Quote 0
                              • travisdh1T
                                travisdh1 @scottalanmiller
                                last edited by

                                @scottalanmiller said in KVM - Virt-Manager on a Separate VM:

                                Who spends $5 on a wrench?

                                Anyone who goes to a brick and mortar store.

                                S 1 Reply Last reply Reply Quote 0
                                • O
                                  Obsolesce @scottalanmiller
                                  last edited by

                                  @scottalanmiller said in KVM - Virt-Manager on a Separate VM:

                                  Who spends $5 on a wrench?

                                  THe cheapest one I found on Amazon is $4.22. Better hope that comes with free shipping.
                                  https://www.amazon.com/s/ref=sr_st_price-asc-rank?keywords=wrench&fst=as%3Aon&rh=n%3A228013%2Cn%3A328182011%2Cn%3A551238%2Ck%3Awrench&qid=1512762244&sort=price-asc-rank

                                  1 Reply Last reply Reply Quote 0
                                  • S
                                    scottalanmiller @travisdh1
                                    last edited by

                                    @travisdh1 said in KVM - Virt-Manager on a Separate VM:

                                    @scottalanmiller said in KVM - Virt-Manager on a Separate VM:

                                    Who spends $5 on a wrench?

                                    Anyone who goes to a brick and mortar store.

                                    See.... you'd just use a brick for a fraction of the price.

                                    travisdh1T 1 Reply Last reply Reply Quote 1
                                    • travisdh1T
                                      travisdh1 @scottalanmiller
                                      last edited by

                                      @scottalanmiller said in KVM - Virt-Manager on a Separate VM:

                                      @travisdh1 said in KVM - Virt-Manager on a Separate VM:

                                      @scottalanmiller said in KVM - Virt-Manager on a Separate VM:

                                      Who spends $5 on a wrench?

                                      Anyone who goes to a brick and mortar store.

                                      See.... you'd just use a brick for a fraction of the price.

                                      Just steal a loose brick!

                                      1 Reply Last reply Reply Quote 0
                                      • B
                                        bnrstnr
                                        last edited by

                                        I've got an old CRT monitor sitting in the corner that could probably do the trick

                                        1 Reply Last reply Reply Quote 1
                                        • D
                                          DustinB3403 @JaredBusch
                                          last edited by DustinB3403

                                          @jaredbusch said in KVM - Virt-Manager on a Separate VM:

                                          @DustinB3403

                                          I use my user in the libvirt group so I do not have to bother with the root user.

                                          gpasswd -a jbusch libvirt
                                          

                                          Then this works.
                                          0_1512760351248_a5ddf1f5-ef56-46e1-b1a7-f9593c68a19c-image.png

                                          Holy fuck it took way to long to get to this point.

                                          So here is the stupid approach. 
                                          
                                          ssh-keygen -t rsa
                                          generating. . .
                                          . . . 
                                          . . . 
                                          The key fingerprint is . . .
                                          
                                          ssh-copy-id -i /home/user/.ssh/d_rsa.pub user@kvm-server-ip
                                          

                                          Login with user@kvm-server-ip password

                                          Test the login

                                          Disconnect from the remote server and run this next bit on your management system.

                                          gpasswd -a username libvirt and then run it on you kvm server assuming you're not using the "root" user.

                                          Done, and it works.

                                          @JaredBusch thanks for cutting through the bullshit and helping out here.

                                          J O 2 Replies Last reply Reply Quote 1
                                          • J
                                            JaredBusch @DustinB3403
                                            last edited by JaredBusch

                                            @dustinb3403 said in KVM - Virt-Manager on a Separate VM:

                                            Disconnect from the remote server and run this next bit on your management system.

                                            gpasswd -a username libvirt

                                            Run that on both systems. Assuming you are using your username and not root in the Virt-Manager connection.

                                            D 1 Reply Last reply Reply Quote 1
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