yahoo-eng-team team mailing list archive

[Christian Ehrhardt  <1940233@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Hi,
I got to this by my systems complaining to be unable to do ssh-keygen
after deployment. Example:
$ uvt-kvm ssh --insecure impish-kvm 'ssh-keygen -b 2048 -t rsa -f ~/.ssh/id_rsa -q -N '\'''\'''
Saving key "/home/ubuntu/.ssh/id_rsa" failed: Permission denied

I found that is due to permissions after guest spawning:

Old:
drwx------ 2 ubuntu ubuntu 4096 Aug 17 08:20 .ssh/

New:
drwxr-xr-x 2 root   root   4096 Aug 17 08:17 .ssh/


That beaks later things like ssh-keygen.

uvt-kvm only does instruct cloud-init to place a key.
This uses ssh_authorized_keys from
https://cloudinit.readthedocs.io/en/latest/topics/modules.html?highlight=ssh_authorized_keys#authorized-keys

Checked a few guests:
I've seen this on
- impish x86
- impish s390x

I've not seen this on
- bionic
- focal
- impish

You might say - wait a minute impish in both lists.
But it is the date:

Bad
com.ubuntu.cloud.daily:server:21.10:amd64 20210815
cloud-init     21.2-69-g65607405-0ubuntu1

Good
com.ubuntu.cloud.daily:server:21.10:amd64 20210706
cloud-init     21.2-3-g899bfaa9-0ubuntu2


And either this cloud-init version is broken or the underlying new impish image.
I mounted the underlying cloud-image (without customization by cloud-init)
and found that /home is empty (true for all those images).

So to me that seems to be an issue in the new cloud-init that now is in
those images.

** Affects: cloud-init
     Importance: Undecided
         Status: New

** Summary changed:

- cloud-init   in impish makes /home/ubuntu/.ssh root.root breaking its use
+ cloud-init   in impish makes /home/ubuntu/.ssh root.root

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to cloud-init.
https://bugs.launchpad.net/bugs/1940233

Title:
  cloud-init   in impish makes /home/ubuntu/.ssh root.root

Status in cloud-init:
  New

Bug description:
  Hi,
  I got to this by my systems complaining to be unable to do ssh-keygen
  after deployment. Example:
  $ uvt-kvm ssh --insecure impish-kvm 'ssh-keygen -b 2048 -t rsa -f ~/.ssh/id_rsa -q -N '\'''\'''
  Saving key "/home/ubuntu/.ssh/id_rsa" failed: Permission denied

  I found that is due to permissions after guest spawning:

  Old:
  drwx------ 2 ubuntu ubuntu 4096 Aug 17 08:20 .ssh/

  New:
  drwxr-xr-x 2 root   root   4096 Aug 17 08:17 .ssh/

  
  That beaks later things like ssh-keygen.

  uvt-kvm only does instruct cloud-init to place a key.
  This uses ssh_authorized_keys from
  https://cloudinit.readthedocs.io/en/latest/topics/modules.html?highlight=ssh_authorized_keys#authorized-keys

  Checked a few guests:
  I've seen this on
  - impish x86
  - impish s390x

  I've not seen this on
  - bionic
  - focal
  - impish

  You might say - wait a minute impish in both lists.
  But it is the date:

  Bad
  com.ubuntu.cloud.daily:server:21.10:amd64 20210815
  cloud-init     21.2-69-g65607405-0ubuntu1

  Good
  com.ubuntu.cloud.daily:server:21.10:amd64 20210706
  cloud-init     21.2-3-g899bfaa9-0ubuntu2

  
  And either this cloud-init version is broken or the underlying new impish image.
  I mounted the underlying cloud-image (without customization by cloud-init)
  and found that /home is empty (true for all those images).

  So to me that seems to be an issue in the new cloud-init that now is in
  those images.

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