CODEWITHSUNDEEP
linuxdockerubuntucriudocker-checkpoint
killsteenkill
killsteenkill

Reputation: 91

Docker Checkpoint/Restore (CRIU) Hanging on Ubuntu 24.04

Environment

Ubuntu 24.04 (Noble) Docker 24.0.7 CRIU 4.0 Kernel: 6.8.0-48-generic

Issue

Both Docker's built-in checkpoint feature and direct CRIU usage hang when attempting to checkpoint a simple container. CRIU works for basic processes outside Docker, but fails within containers. Example

# Start test container
docker run -d --name looper busybox /bin/sh -c 'i=0; while true; do echo $i; i=$(expr $i + 1); sleep 1; done'

# Method 1: Docker checkpoint (hangs)
docker checkpoint create looper checkpoint1

# Method 2: Direct CRIU (hangs at parasite stage)
pid=$(docker inspect --format '{{.State.Pid}}' looper)
sudo criu dump -t $pid -D /tmp/checkpoint --shell-job -v4

How can I successfully checkpoint a Docker container?

Upvotes: 0

Views: 52

Answers (0)

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