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Merged
santhoshdaivajna merged 3 commits into from
May 6, 2026
Merged

Update README.md to have info about cgroupv2 #598

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1035af9
Update README.md to have info about cgroupv2
santhoshdaivajna May 3, 2026
dfe332d
Update README.md
santhoshdaivajna May 3, 2026
35711e6
Update Dockerfile to set cgroupv2 as default
santhoshdaivajna May 3, 2026
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3 changes: 3 additions & 0 deletions Dockerfile
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Expand Up @@ -95,3 +95,6 @@ COPY overlay/files/etc/spectrocloud/custom-hardware-specs-lookup.json /etc/spect

# ENV LB_HOW compile
# ENTRYPOINT /entry.sh

# to set cgroupv2 as default
#RUN sed -i 's|\(set baseCmd="[^"]*\)"|\1 systemd.unified_cgroup_hierarchy=1"|' /etc/cos/bootargs.cfg
22 changes: 22 additions & 0 deletions README.md
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Expand Up @@ -729,3 +729,25 @@ Example syslog entry
```

Entries without these keys in the MSG part of RFC 5424 will still be logged to the stylus-audit.log file but will not be displayed on LocalUI.

# cgroup v2

cgroup v2 is the next version of the Linux cgroup API. cgroup v2 provides a unified control system with enhanced resource management capabilities.
Kubernetes has deprecated cgroup v1. Kubelet will no longer start on a cgroup v1 node by default from k8s v1.35.x. To disable this setting a cluster admin should set failCgroupV1 to false in the [kubelet configuration](https://kubernetes.io/docs/reference/config-api/kubelet-config.v1beta1/) file or while building the installer/provider images set cgroup v2 as default.

In the userdata file, while building the installer add systemd.unified_cgroup_hierarchy=1

```
#cloud-config
install:
grub_options:
extra_cmdline: "systemd.unified_cgroup_hierarchy=1"
```

or if you are upgrading from k8s 1.34.x to 1.35.x and the operating system defaults to cgroup v1, build the provider image with cgroupv2 as default by uncommenting the following line in the Dockerfile.
```
RUN sed -i 's|\(set baseCmd="[^"]*\)"|\1 systemd.unified_cgroup_hierarchy=1"|' \
/etc/cos/bootargs.cfg
```