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-rw-r--r--cloudinit/config/cc_migrator.py22
1 files changed, 22 insertions, 0 deletions
diff --git a/cloudinit/config/cc_migrator.py b/cloudinit/config/cc_migrator.py
index facaa538..6e0bf4bb 100644
--- a/cloudinit/config/cc_migrator.py
+++ b/cloudinit/config/cc_migrator.py
@@ -16,6 +16,28 @@
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
+"""
+Migrator
+--------
+**Summary:** migrate old versions of cloud-init data to new
+
+This module handles moving old versions of cloud-init data to newer ones.
+Currently, it only handles renaming cloud-init's per-frequency semaphore files
+to canonicalized name and renaming legacy semaphore names to newer ones. This
+module is enabled by default, but can be disabled by specifying ``migrate:
+false`` in config.
+
+**Internal name:** ``cc_migrator``
+
+**Module frequency:** per always
+
+**Supported distros:** all
+
+**Config keys**::
+
+ migrate: <true/false>
+"""
+
import os
import shutil