Comment 15 for bug 1536198

Reviewed: https://review.openstack.org/276323
Committed: https://git.openstack.org/cgit/openstack/fuel-library/commit/?id=7574a70511db2ac7d98d820e986cbfec659d6a1e
Submitter: Jenkins
Branch: stable/8.0

commit 7574a70511db2ac7d98d820e986cbfec659d6a1e
Author: Dmitry Bilunov <email address hidden>
Date: Thu Feb 4 01:16:50 2016 +0300

    dockerctl: Update authorized_keys in bootstrap images during restore

    After backup-reinstall-restore Fuel uses bootstrap with wrong ssh keys.

    dockerctl backup procedure does not save the bootstrap's root
    filesystem, which holds the list of authorized keys that should be
    matching the private key located in /root/.ssh on the master.
    It would result in inaccessible nodes from a new master installation
    (which has bootstrap images regenerated with a new key, not matching
    the original one, restored from the backup).

    This patch updates authorized_keys inside squashfsed bootstrap images,
    so it will be retained during backup-reinstall-restore procedure, if
    user has not requested a full backup. Full backups already contain a
    full copy of /var/www/nailgun, so no changes are needed.

    User should carefully restore from non-full backups - only active
    bootstrap will have its ssh keys updated. To propagate ssh keys to
    already running nodes, you can use something like:
      mco rpc --agent execute_shell_command --action execute --arg cmd="echo '$(cat /root/.ssh/id_rsa.pub)' >> /root/.ssh/authorized_keys" -v

    Closes-Bug: #1536198
    DocImpact
    Change-Id: I06d8720b05096a2a7955f164d9404ecb28dc9a3a