feat: upgrade criu 4

.github/workflows/build_push_criu.yml

@@ -8,7 +8,7 @@ on:
 env:
   REGISTRY: ghcr.io
   CRIU_IMAGE_NAME: ${{ github.repository }}-criu
-  CRIU_VERSION: v3.19
+  CRIU_VERSION: v4.0
 
 jobs:
   push_to_registry:

Makefile

@@ -3,7 +3,7 @@ NAMESPACE := ctrox
 INSTALLER_IMAGE := $(REGISTRY)/$(NAMESPACE)/zeropod-installer:dev
 MANAGER_IMAGE := $(REGISTRY)/$(NAMESPACE)/zeropod-manager:dev
 TEST_IMAGE := $(REGISTRY)/$(NAMESPACE)/zeropod-test:dev
-CRIU_VERSION := v3.19
+CRIU_VERSION := v4.0
 CRIU_IMAGE := $(REGISTRY)/$(NAMESPACE)/zeropod-criu:$(CRIU_VERSION)
 DOCKER_SOCK := /var/run/docker.sock
 EBPF_IMAGE := $(REGISTRY)/$(NAMESPACE)/zeropod-ebpf:dev

cmd/installer/main.go

@@ -25,7 +25,7 @@ import (
 )
 
 var (
-	criuImage      = flag.String("criu-image", "ghcr.io/ctrox/zeropod-criu:v3.19", "criu image to use.")
+	criuImage      = flag.String("criu-image", "ghcr.io/ctrox/zeropod-criu:v4.0", "criu image to use.")
 	runtime        = flag.String("runtime", "containerd", "specifies which runtime to configure. containerd/k3s/rke2")
 	hostOptPath    = flag.String("host-opt-path", "/opt/zeropod", "path where zeropod binaries are stored on the host")
 	uninstall      = flag.Bool("uninstall", false, "uninstalls zeropod by cleaning up all the files the installer created")

config/production/kustomization.yaml

@@ -17,7 +17,7 @@ patches:
 - patch: |-
     - op: add
       path: /spec/template/spec/initContainers/0/args/-
-      value: -criu-image=ghcr.io/ctrox/zeropod-criu:v3.19
+      value: -criu-image=ghcr.io/ctrox/zeropod-criu:v4.0
   target:
     kind: DaemonSet
 apiVersion: kustomize.config.k8s.io/v1beta1

criu/Dockerfile

@@ -1,26 +1,26 @@
-# 20.04 seems to be the best compromise for compatibility with most systems.
-# For example when building on 22.04, glibc is too recent to work on GKE. It
-# would be better to have a fully static build of criu but so far that has
-# been a disappointingly unsuccessful endeavour.
-FROM ubuntu:20.04 as build
+FROM debian:12 as build
 RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
-  git build-essential libprotobuf-dev libprotobuf-c-dev \
-  protobuf-c-compiler protobuf-compiler python3-protobuf \
-  libcap-dev libnl-3-dev libnet-dev pkg-config curl ca-certificates
+    git build-essential libprotobuf-dev libprotobuf-c-dev \
+    protobuf-c-compiler protobuf-compiler python3-protobuf \
+    libcap-dev libnl-3-dev libnet-dev pkg-config curl ca-certificates \
+    gnutls-dev
 
 WORKDIR /workspace
 
 RUN git clone https://github.com/checkpoint-restore/criu.git
 WORKDIR /workspace/criu
-ARG CRIU_VERSION=v3.19
+ARG CRIU_VERSION=v4.0
 RUN git checkout $CRIU_VERSION
 RUN make -j $(nproc)
 
+# copy all libraries that criu needs except libc as replacing libc is not that
+# straight-forward.
+RUN mkdir criu-libs/ && \
+    for l in $(ldd criu/criu | awk '{ print $3 }'); do cp $l criu-libs/; done && \
+    rm criu-libs/libc.so*
+
 # we just add libs and binaries from scratch so this image can be used with
 # containerd's client.Install.
 FROM scratch AS export-stage
 COPY --from=build /workspace/criu/criu/criu /bin/
-COPY --from=build /usr/lib/*-linux-gnu/libprotobuf-c.so.1 /lib/
-COPY --from=build /lib/*-linux-gnu/libnl-3.so.200 /lib/
-COPY --from=build /usr/lib/*-linux-gnu/libnet.so.1 /lib/
-COPY --from=build /lib/*-linux-gnu/libjansson.so.4 /lib/
+COPY --from=build /workspace/criu/criu-libs /lib/