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feat: Adding a check which determines if cgroups are enabled on a nod… #11165

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May 9, 2024
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feat: Adding a check which determines if cgroups are enabled on a nod… #11165

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7 changes: 7 additions & 0 deletions roles/kubernetes/preinstall/tasks/0040-verify-settings.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,13 @@
- not ignore_assert_errors
- inventory_hostname in groups['kube_node']

# This command will fail if cgroups are not enabled on the node.
# For reference: https://kubernetes.io/docs/concepts/architecture/cgroups/#check-cgroup-version
- name: Stop if cgroups are not enabled on nodes
command: stat -fc %T /sys/fs/cgroup/
changed_when: false
when: not ignore_assert_errors

# This assertion will fail on the safe side: One can indeed schedule more pods
# on a node than the CIDR-range has space for when additional pods use the host
# network namespace. It is impossible to ascertain the number of such pods at
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