Difference between revisions of "Integration"
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{{Status|ready}} | {{Status|ready}} | ||
| − | As of Virtuozzo 7, CRIU is fully integrated and supported. Older OpenVZ releases used in-kernel checkpoint/restore functionality, now superseded by CRIU. | + | As of Virtuozzo/OpenVZ 7, CRIU is fully integrated and supported. Older OpenVZ releases used in-kernel checkpoint/restore functionality, now superseded by CRIU. |
* [https://openvz.org/ OpenVZ] | * [https://openvz.org/ OpenVZ] | ||
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''See also: [[Docker]] C/R'' | ''See also: [[Docker]] C/R'' | ||
| − | == | + | == Podman == |
| − | {{Status| | + | {{Status|ready}} |
| + | * [https://podman.io/ Project homepage] | ||
| + | * [https://podman.io/blogs/2018/10/10/checkpoint-restore.html Blog entry about adding the support] | ||
== Tools and utilities == | == Tools and utilities == | ||
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== Other == | == Other == | ||
| + | |||
| + | === OpenJDK === | ||
| + | {{Status|started}} | ||
| + | |||
| + | The [https://openjdk.java.net/projects/crac/ CRaC] (Coordinated Restore at Checkpoint) Project researches coordination of Java programs with mechanisms to checkpoint (make an image of, snapshot) a Java instance while it is executing. Restoring from the image could be a solution to some of the problems with the start-up and warm-up times. The primary aim of the Project is to develop a new standard mechanism-agnostic API to notify Java programs about the checkpoint and restore events. Other research activities will include, but will not be limited to, integration with existing checkpoint/restore mechanisms and development of new ones, changes to JVM and JDK to make images smaller and ensure they are correct. | ||
| + | |||
| + | * [https://openjdk.java.net/projects/crac/index.html OpenJDK: CRaC Project] | ||
| + | * [https://wiki.openjdk.java.net/display/crac CRaC Wiki] | ||
| + | * [https://github.com/openjdk/crac CRaC Repository] | ||
=== OpenMPI === | === OpenMPI === | ||
Latest revision as of 10:13, 17 September 2021
CRIU is not so easy to be used as a standalone tool -- it works best integrated into other software. This page lists such software and provides details about the current status.
Container platforms[edit]
Virtuozzo/OpenVZ[edit]
Status: ready
As of Virtuozzo/OpenVZ 7, CRIU is fully integrated and supported. Older OpenVZ releases used in-kernel checkpoint/restore functionality, now superseded by CRIU.
LXC/LXD[edit]
Status: ready
- Project homepage
- The tools version 1.1.0 fully supports CRIU to C/R LXC containers
- lxc-checkpoint man page
See also: LXC
Docker[edit]
Status: ready
- Project homepage
- Merged into libcontainer/runc
- Merged into Docker itself
- Preparations efforts done by Saied Kazemi
See also: Docker C/R
Podman[edit]
Status: ready
Tools and utilities[edit]
The file utility[edit]
Status: ready
- Starting from v1.6 new images (v1.1) will be generated
- File utility starting from 5.23 will support these
Screen/TMUX[edit]
Status: stalled
- Jerome did this some time ago
See also: Screen
Shell[edit]
Status: not started
It would be nice to have bash (or other shell) to launch criu with --restore-sibling option and get new kid processes from it. Right now we workaround it with "shell jobs".
See also: Shell jobs
Other[edit]
OpenJDK[edit]
Status: started
The CRaC (Coordinated Restore at Checkpoint) Project researches coordination of Java programs with mechanisms to checkpoint (make an image of, snapshot) a Java instance while it is executing. Restoring from the image could be a solution to some of the problems with the start-up and warm-up times. The primary aim of the Project is to develop a new standard mechanism-agnostic API to notify Java programs about the checkpoint and restore events. Other research activities will include, but will not be limited to, integration with existing checkpoint/restore mechanisms and development of new ones, changes to JVM and JDK to make images smaller and ensure they are correct.
OpenMPI[edit]
Status: stalled
- Adrian Reber did first version of patches
Subgraph OS[edit]
Status: not started
- Subgraph OS is a desktop operation system uses containers for users applications.
SLURM workload manager[edit]
Status: ready
- Project homepage here
- Integration code on the github
Wayland/Weston[edit]
Status: stalled
- Ruslan Kuprieiev plans to patch Weston to let CRIU C/R graphical apps
See also: X applications
Systemd[edit]
Status: not started
Adrian suggested that migrating processes from one system to another works, depending on the process, pretty good. Migrating a process under systemd's control might be possible by just killing the process on the source side but it cannot become a child process of systemd on the destination of the migration without systemd knowing how to restore a process and thus making it a child process of systemd (--restore-sibling).