This article provides an overview of CRIU integration with runc and explains how to use it.
Container Checkpoint/Restore
mkdir -p alpine-container/rootfs && cd alpine-container
wget https://dl-cdn.alpinelinux.org/alpine/latest-stable/releases/x86_64/alpine-minirootfs-3.22.2-x86_64.tar.gz
tar -xzf alpine-minirootfs-3.22.2-x86_64.tar.gz -C rootfs
rm -f alpine-minirootfs-3.22.2-x86_64.tar.gz
runc spec
sed -i 's/"sh"/\"sh -c '\i=0; while true; do echo $i; i=$(expr $i + 1); sleep 1; done'\'\"'/' config.json
sed -i 's/"terminal": true/"terminal": false/g' config.json
sudo runc run -d looper 0</dev/null 1>/dev/null 2>/dev/null