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[Bug 1567786] [NEW] missing ssh_host keys in /etc/ssh/

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Xiangfei Zhu <xiangfeiz@xxxxxxxxxx>
Date: Fri, 08 Apr 2016 06:57:02 -0000
Reply-to: Bug 1567786 <1567786@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

I'm using cloud-init 0.7.5-0ubuntu1.7 on ubuntu 14.04 as a glance image
in an OpenStack deployment. I randomly saw failure to ssh to VM booted
with this image. When I checked the VM from console, I find all ssh_host
keys are missing from /etc/ssh/

I do see logs of ssh-keygen runs in cloud-init.log, cloud-init-
output.log and boot.log.

2016-03-15 06:44:11,327 - helpers.py[DEBUG]: Running config-ssh using lock (<FileLock using file '/var/lib/cloud/instances/f4c31778-7b14-465c-b7e6-765f11c3b588/sem/config_ssh'>)
2016-03-15 06:44:11,329 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_ecdsa_key.pub
2016-03-15 06:44:11,329 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_dsa_key
2016-03-15 06:44:11,330 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_rsa_key
2016-03-15 06:44:11,330 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_ed25519_key.pub
2016-03-15 06:44:11,330 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_ecdsa_key
2016-03-15 06:44:11,330 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_dsa_key.pub
2016-03-15 06:44:11,331 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_ed25519_key
2016-03-15 06:44:11,331 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_rsa_key.pub
2016-03-15 06:44:11,331 - util.py[DEBUG]: Running command ['ssh-keygen', '-t', 'rsa', '-N', '', '-f', '/etc/ssh/ssh_host_rsa_key'] with allowed return codes [0] (shell=False, capture=False)
2016-03-15 06:44:11,501 - util.py[DEBUG]: Running command ['ssh-keygen', '-t', 'dsa', '-N', '', '-f', '/etc/ssh/ssh_host_dsa_key'] with allowed return codes [0] (shell=False, capture=False)
2016-03-15 06:44:11,630 - util.py[DEBUG]: Running command ['ssh-keygen', '-t', 'ecdsa', '-N', '', '-f', '/etc/ssh/ssh_host_ecdsa_key'] with allowed return codes [0] (shell=False, capture=False)

And I don't see any failure of ssh key generation in the logs.

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

** Description changed:

  I'm using cloud-init 0.7.5-0ubuntu1.7 on ubuntu 14.04 as a glance image
  in an OpenStack deployment. I randomly saw failure to ssh to VM booted
  with this image. When I checked the VM from console, I find all ssh_host
  keys are missing from /etc/ssh/
  
  I do see logs of ssh-keygen runs in cloud-init.log, cloud-init-
  output.log and boot.log.
- 
  
  2016-03-15 06:44:11,327 - helpers.py[DEBUG]: Running config-ssh using lock (<FileLock using file '/var/lib/cloud/instances/f4c31778-7b14-465c-b7e6-765f11c3b588/sem/config_ssh'>)
  2016-03-15 06:44:11,329 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_ecdsa_key.pub
  2016-03-15 06:44:11,329 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_dsa_key
  2016-03-15 06:44:11,330 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_rsa_key
  2016-03-15 06:44:11,330 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_ed25519_key.pub
  2016-03-15 06:44:11,330 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_ecdsa_key
  2016-03-15 06:44:11,330 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_dsa_key.pub
  2016-03-15 06:44:11,331 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_ed25519_key
  2016-03-15 06:44:11,331 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_rsa_key.pub
  2016-03-15 06:44:11,331 - util.py[DEBUG]: Running command ['ssh-keygen', '-t', 'rsa', '-N', '', '-f', '/etc/ssh/ssh_host_rsa_key'] with allowed return codes [0] (shell=False, capture=False)
  2016-03-15 06:44:11,501 - util.py[DEBUG]: Running command ['ssh-keygen', '-t', 'dsa', '-N', '', '-f', '/etc/ssh/ssh_host_dsa_key'] with allowed return codes [0] (shell=False, capture=False)
  2016-03-15 06:44:11,630 - util.py[DEBUG]: Running command ['ssh-keygen', '-t', 'ecdsa', '-N', '', '-f', '/etc/ssh/ssh_host_ecdsa_key'] with allowed return codes [0] (shell=False, capture=False)
+ 
+ And I don't see any failure of ssh key generation in the logs.

-- 
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https://bugs.launchpad.net/bugs/1567786

Title:
  missing ssh_host keys in /etc/ssh/

Status in cloud-init:
  New

Bug description:
  I'm using cloud-init 0.7.5-0ubuntu1.7 on ubuntu 14.04 as a glance
  image in an OpenStack deployment. I randomly saw failure to ssh to VM
  booted with this image. When I checked the VM from console, I find all
  ssh_host keys are missing from /etc/ssh/

  I do see logs of ssh-keygen runs in cloud-init.log, cloud-init-
  output.log and boot.log.

  2016-03-15 06:44:11,327 - helpers.py[DEBUG]: Running config-ssh using lock (<FileLock using file '/var/lib/cloud/instances/f4c31778-7b14-465c-b7e6-765f11c3b588/sem/config_ssh'>)
  2016-03-15 06:44:11,329 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_ecdsa_key.pub
  2016-03-15 06:44:11,329 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_dsa_key
  2016-03-15 06:44:11,330 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_rsa_key
  2016-03-15 06:44:11,330 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_ed25519_key.pub
  2016-03-15 06:44:11,330 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_ecdsa_key
  2016-03-15 06:44:11,330 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_dsa_key.pub
  2016-03-15 06:44:11,331 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_ed25519_key
  2016-03-15 06:44:11,331 - util.py[DEBUG]: Attempting to remove /etc/ssh/ssh_host_rsa_key.pub
  2016-03-15 06:44:11,331 - util.py[DEBUG]: Running command ['ssh-keygen', '-t', 'rsa', '-N', '', '-f', '/etc/ssh/ssh_host_rsa_key'] with allowed return codes [0] (shell=False, capture=False)
  2016-03-15 06:44:11,501 - util.py[DEBUG]: Running command ['ssh-keygen', '-t', 'dsa', '-N', '', '-f', '/etc/ssh/ssh_host_dsa_key'] with allowed return codes [0] (shell=False, capture=False)
  2016-03-15 06:44:11,630 - util.py[DEBUG]: Running command ['ssh-keygen', '-t', 'ecdsa', '-N', '', '-f', '/etc/ssh/ssh_host_ecdsa_key'] with allowed return codes [0] (shell=False, capture=False)

  And I don't see any failure of ssh key generation in the logs.

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Follow ups

[Bug 1567786] Re: missing ssh_host keys in /etc/ssh/
From: Launchpad Bug Tracker, 2018-01-26