Force CgroupsV1 on Ubuntu

PR #115 removed a force-cgroups-v2 setup for Ubuntu, possibly assuming that Ubuntu uses cgroups v1 by default? That doesn't seem to be the case: the Ubuntu I've looked at (via Cirrus rerun-with-terminal) seems to default to v2. End result is that we've been running CI for months without testing runc. This PR forces cgroups v1 on Ubuntu, via grub boot args. Signed-off-by: Ed Santiago <[email protected]>
containers · Jul 19, 2022 · 5239508 · 5239508
1 parent 7731369
commit 5239508
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/cache_images/ubuntu_setup.sh b/cache_images/ubuntu_setup.sh
@@ -23,7 +23,8 @@ bash $SCRIPT_DIRPATH/ubuntu_packaging.sh
 
 if ! ((CONTAINER)); then
     warn "Making Ubuntu kernel to enable cgroup swap accounting"
-    SEDCMD='s/^GRUB_CMDLINE_LINUX="(.*)"/GRUB_CMDLINE_LINUX="\1 cgroup_enable=memory swapaccount=1"/'
+    warn "Forcing CgroupsV1"
+    SEDCMD='s/^GRUB_CMDLINE_LINUX="(.*)"/GRUB_CMDLINE_LINUX="\1 cgroup_enable=memory swapaccount=1 systemd.unified_cgroup_hierarchy=0"/'
     ooe.sh $SUDO sed -re "$SEDCMD" -i /etc/default/grub.d/*
     ooe.sh $SUDO sed -re "$SEDCMD" -i /etc/default/grub
     ooe.sh $SUDO update-grub