Lewis M's questions

A couple of weeks ago I asked about configuring Ubuntu preseed to configure LVM partitions. I got no response to that one.

I was able to figure out how to get logical volumes defined for UEFI within a preseed file for Ubuntu 16.04 desktop. Now I'm trying to set up the physical volume on which the root logical volume (/) resides. I don't expect an answer, but I have to try. :)

The following d-i directives in my preseed file work for configuring LVM and all of my filesystems on an UEFI based virtual machine.

# Partitioning
d-i partman-auto/disk string /dev/sda
d-i partman-lvm/device_remove_lvm boolean true
d-i partman-lvm/confirm boolean true
d-i partman/confirm_write_new_label boolean true
d-i partman-basicfilesystems/choose_label string gpt
d-i partman-basicfilesystems/default_label string gpt
d-i partman-partitioning/choose_label string gpt
d-i partman-partitioning/default_label string gpt
d-i partman/choose_label string gpt
d-i partman/default_label string gpt

d-i partman-auto-lvm/guided_size string max
d-i partman-auto/method string lvm
d-i partman-auto-lvm/new_vg_name string vg00
d-i partman-auto/choose_recipe select gpt-boot-root-swap
d-i partman-auto/expert_recipe string \
    gpt-boot-root-swap ::             \
        512 512 512 fat32             \
            $primary{ }               \
            method{ efi } format{ } . \
        1024 1024 1024 ext2              \
            $primary{ } $bootable{ }  \
            method{ format } format{ } \
            use_filesystem{ } filesystem{ ext2 } \
            mountpoint{ /boot } .                \
        1000 1000 1000000000 ext4                \
            $defaultignore{ }                    \
            $primary{ }                          \
            method{ lvm } \
            device{ /dev/sda } \
            vg_name{ vg00 } \
            . \
        1024 3072 10240 ext4 \
            $lvmok{ } \
            in_vg{ vg00 } lv_name{ lv_root } \
            method{ format } format{ }           \
            use_filesystem{ } filesystem{ ext4 } \
            mountpoint{ / } .                    \
        1024 1024 1000000000 ext4                \
            $lvmok{ }                          \
            $defaultignore{ }                    \
            in_vg{ vg00 } lv_name{ lv_delete } \
            .

d-i partman-partitioning/confirm_write_new_label boolean true
d-i partman/choose_partition select finish
d-i partman/confirm boolean true
d-i partman/confirm_nooverwrite boolean true

I've been trying to add encryption to /dev/sda3, which is the physical volume associated with the vg00 volume group on which lv_root is created. I have added the following directives into the preseed file

d-i partman-auto/method string crypto
d-i partman-crypto/create/partitions select /dev/sda3
d-i partman-crypto/keytype select passphrase
d-i partman-crypto/keyhash select sha512
d-i partman-crypto/keysize select 512
d-i partman-crypto/cipher select aes-xts-plain64
d-i partman-crypto/passphrase string ThisIsATest
d-i partman-crypto/passphrase-again string ThisIsATest

I found the above by piecing together bits and pieces I able to put together by doing web searches.

As an aside, Canonical, if Ubuntu is really your bread and butter, why don't you have better documentation? Everything I have found has been from places other than any Ubuntu website.

I know there are things missing, but I do not know what those d-i directives would be. For example, what is the d-i partman-crypto directive to name the encrypted volume? I'm sure that's needed here. I'm sure that is why when I try to boot off of my custom ISO I eventually get the error message

No physical volume defined in volume group
The automatic partitioning recipe contains the definition of a
volume group that does not contain any physical volume.
Please check the automatic partitioning recipe

Like I said at the beginning, I do not expect anyone to answer this question since it's even more niche than my automatic partitioning LVM preseeding question, but I have to try.

Thank you in advance for any help you can provide.

I have the following in a preseed file for ubuntu 16.04

# Partitioning
d-i partman-auto/disk string /dev/sda
d-i partman-auto/method string lvm
d-i partman-auto/purge_lvm_from_device boolean true
d-i partman/choose_partition select finish
d-i partman-partitioning/confirm_write_new_label boolean true
d-i partman-lvm/device_remove_lvm boolean true
d-i partman-lvm/confirm boolean true
d-i partman-lvm/confirm_nooverwrite boolean true
d-i partman-md/device_remove_md boolean true
d-i partman-md/confirm boolean true
d-i partman/confirm_nooverwrite boolean true
d-i partman/confirm boolean true

d-i partman-auto/choose_recipe select bios-boot-root-swap
d-i partman-auto/expert_recipe string            \
    bios-boot-root-swap ::                       \
        512 10 512 ext4 \
            $primary{ } $bootable{ } \
            method{ format } format{ } \
            use_filesystem{ } filesystem{ ext4 } \
            mountpoint{ /boot } . \
        6144 20 -1 ext4 \
            $defaultignore{ } \
            $primary{ } \
            method{ lvm } \
            device{ /dev/sda } \
            vg_name{ vg00 } . \
        1024 110 50% linux-swap \
            $lvmok{ } \
            in_vg{ vg00 } lv_name{ lv_swap } \
            method{ swap } format{ } . \
        5120 120 -1 ext4 \
            $lvmok{ } \
            in_vg{ vg00 } lv_name{ lv_root } \
            method{ format } format{ } \
            use_filesystem{ } filesystem{ ext4 } \
            mountpoint{ / } .

I put this together based on what I could find online. The ubuntu documentation for doing this is woefully inadequate!

Basically, what I want to do is set up to automatically install Ubuntu 16.04 desktop on BIOS based PCs. I've been testing this on a VirtualBox VM at this time. I have a single disk in the VM. I've tried with 10GB and 20GB virtual disks. I want a /boot partition that is 512MB in size. I want another primary partition to be the rest of the disk. I want to use that partition as a physical volume for a LVM volume group named vg00. Within that volume group, I want a swap partition that is at least 1GB in size, but no greater than 50% of my total RAM, which is 4GB in my VM. I want a second logical volume for the root partition (i.e. /).

The above appears to work to get the OS installed. However, when the install is done, the VM fails to boot. It gives me the VirtualBox VM BIOS firmware screen. It then blanks out.

I have no problems with setting up something similar with just plain partitions. That works just fine. When I try to switch to using LVM, it took over 2 days to get the preseed file to a point where the OS installs. Now though, I do not know how to proceed.

Any help figuring out what is wrong with my preseed would be greatly appreciated.

Thank you

I'm not sure if this is a python question or a launchpad question since I am new to both. I am getting a collection of bugs in a bug_task collection. I am running searchTasks. The API reference documentation says bug_link is a link to a bug object. The bug object has the id. I was hoping to be able to print out the bug id by just getting the attribute, but that is not working.

Here is the relevant snippet of code:

bug_tasks = series.searchTasks(status=['New'],importance=['Critical'])
for bug in bug_tasks:
    print(bug)
    bug_link=bug.bug_link
    bug_id=bug_link.id
    print(bug_id)

When I run the script, I get the error

https://api.launchpad.net/devel/ubuntu/xenial/+source/linux/+bug/1626158
Traceback (most recent call last):
  File "./get_ubuntu_bug_list.py", line 39, in <module>
    bug_id=bug_link.id
AttributeError: 'unicode' object has no attribute 'id'

I've also tried

bug_id=bug_link.get(id)
bug_id=get(bug_link.id)
bug_id=get(bug_link).id

None of those worked.

Any help on how to get the bug id from bug_link would be appreciated.

Thank you