I'm looking for the better tool /method / technique that can help me to keep synchronized in real time two Ubuntu installations. I want that every change I make to one of them will be immediately applied to the other one. Now I'm going to explain how is configured my setup. Let's start saying that my primary OS is FreeBSD and that I'm using bhyve to virtualize Ubuntu,using the following parameters :
bhyve -S -c sockets=1,cores=2,threads=2 -m 4G -w -H -A \
-s 0,hostbridge \
-s 1,ahci-hd,/mnt/da3p2/bhyve/nvme.img \
-s 2,passthru,1/0/0 \
-s 3:0,passthru,2/0/0 \
-s 3:1,passthru,2/0/1 \
-s 3:2,passthru,2/0/2 \
-s 3:3,passthru,2/0/3 \
-s 8,virtio-net,tap1 \
-s 9,virtio-9p,sharename=/mnt/nvd0p7 \
-s 30,xhci,tablet \
-s 31,lpc \
-s 29,fbuf,tcp=0.0.0.0:5901,w=1440,h=900 \
-l bootrom,/usr/local/share/uefi-firmware/BHYVE_BHF_CODE.fd \
-l com1,stdio \
vm1
Actually I have installed Ubuntu 21.10 physically on my nvme disk and it is partitioned like this :
marietto@marietto:/usr/home/marietto # gpart show :
root@marietto:/usr/home/marietto # gpart show
=> 34 1953525101 nvd0 GPT (932G)
34 2014 - free - (1.0M)
2048 1748992 1 efi (854M)
1751040 1113507840 2 ms-basic-data (531G)
1115258880 833185547 7 ms-basic-data (397G)
1948444427 245 - free - (123K)
1948444672 1318912 3 ms-recovery (644M)
1949763584 2048 - free - (1.0M)
1949765632 1310720 4 ms-recovery (640M)
1951076352 2048 - free - (1.0M)
1951078400 1265657 5 ms-basic-data (618M)
1952344057 7 - free - (3.5K)
1952344064 1179641 6 ms-basic-data (576M)
1953523705 1430 - free - (715K)
Ubuntu 21.10 is installed on the slot /dev/nvd0p7. What I wanted to do at the beginning was to boot that Ubuntu physical installation directly on bhyve,pointing it to /dev/nvd0,but there is a bug and it does not work for the easiest way. So,I found a "workaround" ; I have cloned my nvme disk with dd and I've created an img / raw file called "nvme.img" and I've copied it to my 2 TB size disk. Now,when I want to boot and use Ubuntu 21.10,I can do it directly when I'm running FreeBSD and bhyve. The real Ubuntu installation and its img file are almost identical. Actually when I boot the nvme.img file with bhyve,I have also share the partition where I have mounted the physical installation of Ubuntu in FreeBSD,using this parameter :
-s 9,virtio-9p,sharename=/mnt/nvd0p7 \
So,the real partition where are all the files of the physical Ubuntu installation is available when I boot the Ubuntu image created with dd while I'm using FreeBSD and bhyve. Good. at this point you have all the elements to understand what I want to do. While I'm using the image of Ubuntu created with dd,some files of this installation will change. What I want to do is to keep them synchronized with the files stored on the physical installation of Ubuntu,mapped at /mnt/nvd0p7 ; doing this,when,in the future I will boot the physical installation of Ubuntu,I will have all the files updated correctly. If everything will work correctly there will be no need to boot Ubuntu physically,but it could happen. So,which kind of tool / method you suggest me to accomplish this task ? thanks.
