From 288ccc4c84e917df0ff0ee659f47e3ecbc87796a Mon Sep 17 00:00:00 2001 From: Radostin Stoyanov Date: Fri, 18 Dec 2020 20:07:08 +0000 Subject: Include named volumes in container migration When migrating a container with associated volumes, the content of these volumes should be made available on the destination machine. This patch enables container checkpoint/restore with named volumes by including the content of volumes in checkpoint file. On restore, volumes associated with container are created and their content is restored. The --ignore-volumes option is introduced to disable this feature. Example: # podman container checkpoint --export checkpoint.tar.gz The content of all volumes associated with the container are included in `checkpoint.tar.gz` # podman container checkpoint --export checkpoint.tar.gz --ignore-volumes The content of volumes is not included in `checkpoint.tar.gz`. This is useful, for example, when the checkpoint/restore is performed on the same machine. # podman container restore --import checkpoint.tar.gz The associated volumes will be created and their content will be restored. Podman will exit with an error if volumes with the same name already exist on the system or the content of volumes is not included in checkpoint.tar.gz # podman container restore --ignore-volumes --import checkpoint.tar.gz Volumes associated with container must already exist. Podman will not create them or restore their content. Signed-off-by: Radostin Stoyanov --- docs/source/markdown/podman-container-checkpoint.1.md | 6 ++++++ docs/source/markdown/podman-container-restore.1.md | 7 +++++++ 2 files changed, 13 insertions(+) (limited to 'docs/source') diff --git a/docs/source/markdown/podman-container-checkpoint.1.md b/docs/source/markdown/podman-container-checkpoint.1.md index bfda782c5..6a9469156 100644 --- a/docs/source/markdown/podman-container-checkpoint.1.md +++ b/docs/source/markdown/podman-container-checkpoint.1.md @@ -52,6 +52,12 @@ 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. +#### **--ignore-volumes** + +This option must be used in combination with the **--export, -e** option. +When this option is specified, the content of volumes associated with +the container will not be included into the checkpoint tar.gz file. + ## EXAMPLE podman container checkpoint mywebserver diff --git a/docs/source/markdown/podman-container-restore.1.md b/docs/source/markdown/podman-container-restore.1.md index 494e7db1e..0593e6fe9 100644 --- a/docs/source/markdown/podman-container-restore.1.md +++ b/docs/source/markdown/podman-container-restore.1.md @@ -85,6 +85,13 @@ exported checkpoint with **--name, -n**. Using **--ignore-static-mac** tells Podman to ignore the MAC address if it was configured with **--mac-address** during container creation. + +#### **--ignore-volumes** + +This option must be used in combination with the **--import, -i** option. +When restoring containers from a checkpoint tar.gz file with this option, +the content of associated volumes will not be restored. + ## EXAMPLE podman container restore mywebserver -- cgit v1.2.3-54-g00ecf