付録B Restoring Manual Changes Overwritten by a Puppet Run

Procedure

1. Copy the file you intend to restore. This allows you to compare the files to check for any mandatory changes required by the upgrade. This is not common for DNS or DHCP services.

   # cp /etc/dhcp/dhcpd.conf /etc/dhcp/dhcpd.backup

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2. Check the log files to note down the md5sum of the overwritten file. For example:

   # journalctl -xe
   ...
   /Stage[main]/Dhcp/File[/etc/dhcp/dhcpd.conf]: Filebucketed /etc/dhcp/dhcpd.conf to puppet with sum 622d9820b8e764ab124367c68f5fa3a1
   ...

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3. Restore the overwritten file:

   # puppet filebucket restore --local --bucket \
   /var/lib/puppet/clientbucket /etc/dhcp/dhcpd.conf \ 622d9820b8e764ab124367c68f5fa3a1

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4. Compare the backup file and the restored file, and edit the restored file to include any mandatory changes required by the upgrade.