Add --ignore-rootfs option for checkpoint/restore

The newly added functionality to include the container's root
file-system changes into the checkpoint archive can now be explicitly
disabled. Either during checkpoint or during restore.

If a container changes a lot of files during its runtime it might be
more effective to migrated the root file-system changes in some other
way and to not needlessly increase the size of the checkpoint archive.

If a checkpoint archive does not contain the root file-system changes
information it will automatically be skipped. If the root file-system
changes are part of the checkpoint archive it is also possible to tell
Podman to ignore these changes.

Signed-off-by: Adrian Reber <areber@redhat.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/docs/podman-container-checkpoint.1.md b/docs/podman-container-checkpoint.1.md
index 90c3919a9..034d338bb 100644
--- a/docs/podman-container-checkpoint.1.md
+++ b/docs/podman-container-checkpoint.1.md
@@ -42,7 +42,15 @@ connections.
 
 Export the checkpoint to a tar.gz file. The exported checkpoint can be used
 to import the container on another system and thus enabling container live
-migration.
+migration. This checkpoint archive also includes all changes to the container's
+root file-system, if not explicitly disabled using **--ignore-rootfs**
+
+**--ignore-rootfs**
+
+This only works in combination with **--export, -e**. If a checkpoint is
+exported to a tar.gz file it is possible with the help of **--ignore-rootfs**
+to explicitly disable including changes to the root file-system into
+the checkpoint archive file.
 
 ## EXAMPLE