How to upgrade boot2docker on device?

[zhangqianliang]

I install boot2docker(v0.9.1) on /dev/sda1(size: 50), and I try to update to v1.0.0. I found it rewrite the disk, /dev/sda2 was missing.

So, how should I upgrade boot2docker to version 1.0.0, and keep data alive meanwhile?

Thanks!

[SvenDowideit]

@charleyzhang From 0.9.1 its complicated, as there are quite a number of changes in virtual machine setup - including a change in Docker engine port number to 2375.

you can try

docker stop
docker download

and then add a second network interface - host only.

this won't set up the ssh key magic, and you'll need to work out how to change the port forwarding.

mmm - or maybe, you could make a copy of the virtualbox disk, then boot2docker delete , create a new vm with the new boot2docker, and later copy the virtual box disk back (losing only the ssh key auto-login)

[zhangqianliang]

@SvenDowideit My situation was in bare metal. I found this way work:

1. Re-fdisk, and keep the size of /dev/sda1 same with its previous. Rest to be /dev/sda2(also same as its previous).
2. Install boot2docker v1.0.0 into /dev/sda2, and then reboot. The result: my data are still there.

[SvenDowideit]

@charleyzhang interesting - so how are you 'installing'? I'd love to have a better upgrade process for bare metal too..

[zhangqianliang]

@SvenDowideit Here is my steps:

1. First time to install boot2docker(v0.12.0) with CDROM:
   a) $ dd if=/dev/cdrom of=/dev/sda
   b) fdisk disk with 2 primary partitions:
   $ sudo fdisk /dev/sda
   $ n
   $ p
   $ 2
   $ ENTER
   $ ENTER
   $ w
   c) format sda2: $ sudo mkfs.ext4 /dev/sda2
   d) mount into /mnt/: $ sudo mkdir -p /mnt/sda2 $ sudo mount /dev/sda2 /mnt/sda2
   e) Add some private files into /mnt/sda2, like pulling some docker images, or other test files.
   f) reboot.
2. Update to boot2docker v1.0.0 with CDROM, same steps as 1 a) b) , and then reboot, after rebooting, you will find the data added in /mnt/sda2 was still there.

[SvenDowideit]

excellent :) I thought I tested that, but iirc, i had a much more complicated disk layout, so decided it was a more risk than I wanted. So I still boot from usb :)

[zhangqianliang]

@SvenDowideit lol, if I had a much more complicated disk layout, I would boot from usb too.