Difference between revisions of "Integration"

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(Docker is done)
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{{Status|ready}}
 
{{Status|ready}}
  
Currently, vzctl supports CRIU for checkpoint/restore of upstream containers (i.e. when non-OpenVZ kernel is used). Commands <code>vzctl suspend</code> and <code>vzctl restore</code> fully work. Live migration doesn't work yet as it requires support for <code>vzctl suspend {--suspend, --dump, --kill, --restore}</code> which is not yet implemented as it requires a separate daemon to hold the state of a partially checkpointed container (or an ability from criu tool to do that).
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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 Older OpenVZ releases used in-kernel checkpoint/restore functionality, now superseded by CRIU.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 Project homepage]
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* [http://git.openvz.org/?p=vzctl&a=search&h=HEAD&st=commit&s=CRIU%7Ccriu%7Ccrtools&sr=1 Relevant vzctl git commits]
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* [https://openvz.org/ OpenVZ]
* [https://openvz.org/Virtuozzo Virtuozzo] is a virtualization and automation solution built on top of OpenVZ.
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* [https://virtuozzo.com/ Virtuozzo]
  
 
=== LXC/LXD ===
 
=== LXC/LXD ===
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''See also: [[Docker]] C/R''
 
''See also: [[Docker]] C/R''
  
=== CoreOS Rocket ===
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== Podman ==
{{Status|not started}}
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{{Status|ready}}
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* [https://podman.io/ Project homepage]
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* [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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* Jerome [https://github.com/jpetazzo/critmux did] this some time ago
 
* Jerome [https://github.com/jpetazzo/critmux did] this some time ago
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 +
''See also: [[Screen]]''
  
 
=== Shell ===
 
=== Shell ===
 
{{Status|not started}}
 
{{Status|not started}}
  
It would be nice to have bash (or other shell) to launch criu with <code>--restore-sibling</code> option and get new kid processes from it.
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It would be nice to have bash (or other shell) to launch criu with <code>--restore-sibling</code> option and get new kid processes from it. Right now we workaround it with "[[shell jobs]]".
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''See also: [[Shell jobs]]''
  
 
== Other ==
 
== Other ==
 +
 +
=== OpenJDK ===
 +
{{Status|started}}
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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.
 +
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* [https://openjdk.java.net/projects/crac/index.html OpenJDK: CRaC Project]
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* [https://wiki.openjdk.java.net/display/crac CRaC Wiki]
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* [https://github.com/openjdk/crac CRaC Repository]
  
 
=== OpenMPI ===
 
=== OpenMPI ===
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=== Systemd ===
 
=== Systemd ===
 
{{Status|not started}}
 
{{Status|not started}}
Adrian suggested that
 
  
Migrating
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Adrian suggested that migrating
processes from one system to another works, depending on the process,
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processes from one system to another works, depending on the process,
pretty good. Migrating a process under systemd's control might be
+
pretty good. Migrating a process under systemd's control might be
possible by just killing the process on the source side but it cannot
+
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
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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
+
without systemd knowing how to restore a process and thus making it a
child process of systemd (--restore-sibling).
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child process of systemd (--restore-sibling).
  
 
[[Category:Plans]]
 
[[Category:Plans]]
 
[[Category:Development]]
 
[[Category:Development]]

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

See also: LXC

Docker[edit]

Status: ready

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

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).