group.of.nepali.translators team mailing list archive

[Scott Moser <smoser@xxxxxxxxxx>]

I've added a 'maas-images' task for this.  Under that task we will add
the cloud-initramfs-rooturl package to the initramfs that are generated
there.


** Also affects: maas-images
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1688606

Title:
  SRU cloud-initramfs-rooturl to archive

Status in maas-images:
  New
Status in cloud-initramfs-tools package in Ubuntu:
  Confirmed
Status in cloud-initramfs-tools source package in Trusty:
  Confirmed
Status in cloud-initramfs-tools source package in Xenial:
  Confirmed
Status in cloud-initramfs-tools source package in Yakkety:
  Confirmed

Bug description:
  === Begin SRU Template ===
  [Impact]
  MAAS has an interest in booting entirely ephemerally without iscsi root.
  The package cloud-initramfs-rooturl supports booting with root coming
  from a url.
    root=http://..../squashfs

  This function will be used to pxe boot into a RAM only system with no
  dependency on the network.

  [Test Case]
  See the attached prepare-1688606.sh.  That script automates
  everything here making this much easier to test.

  1. make sure squashfs module is in the initramfs
     squashfs module is not automatically added to initramfs in precise.
     Just ensure that it is there.

     $ echo "manual_add_modules squashfs" |
        sudo tee /etc/initramfs-tools/hooks/squashfs

  2. install cloud-initramfs-rooturl
     sudo apt-get update
     sudo apt-get install cloud-initramfs-rooturl

  3. collect the kernel and newly generated initramfs

     sudo cat /boot/vmlinu?-$(uname -r) > kernel
     cp /boot/initrd.img-$(uname -r) initrd

  4. Download a squashfs image or a .tar.xz image

     rel="xenial"
     burl="http://cloud-images.ubuntu.com/daily/server";
     file="$rel-server-cloudimg-amd64-root.tar.xz"
     file="$rel-server-cloudimg-amd64.squashfs"
     wget "$burl/$rel/current/$file" -O "$file"

  5. run a web server
     python -m SimpleHTTPServer 9999 &

  6. create a seed disk for cloud-init.

     $ cat > my-user-data <<EOF
     #cloud-config
     password: passw0rd
     chpasswd: { expire: False }
     ssh_pwauth: True

     $ echo "instance-id: $(uuidgen || echo i-abcdefg)" > my-meta-data
     $ cloud-localds seed.img my-user-data my-meta-data

  7. Boot a vm using the kernel, initrd and url.

     cmdline="root=http://10.0.2.2:9999/$file console=ttyS0 -v "
     cmdline="${cmdline} overlayroot=tmpfs"

     qemu-system-x86_64 -enable-kvm \
        -device virtio-net-pci,netdev=net00 \
        -netdev type=user,id=net00 \
        -drive if=virtio,file=seed.img \
        -m 1G -nographic \
        -kernel kernel -initrd initrd \
        -append "root=$cmdline"

  [Regression Potential]
  Low.  This is adding a package previously not present.

  [Other Info]

  === End SRU Template ===

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