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optimize cgroups settings for node reserved (#9209)

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* optimize cgroups settings for node reserved

* fix

* set cgroup slice for multi container engine

* set cgroup slice for crio

* add reserved cgroups variables to sample files

* Compatible with cgroup path for different container managers

* add cgroups doc

* fix markdown
This commit is contained in:
Shelming.Song
2022-12-31 00:05:30 +08:00
committed by GitHub
parent 744c81d451
commit 1c4db6132d
9 changed files with 147 additions and 4 deletions
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12
roles/kubernetes/node/defaults/main.yml
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@@ -12,11 +12,11 @@ kube_resolv_conf: "/etc/resolv.conf"
kubelet_enforce_node_allocatable: "\"\""
# Set runtime and kubelet cgroups when using systemd as cgroup driver (default)
kubelet_runtime_cgroups: "/systemd/system.slice"
kubelet_kubelet_cgroups: "/systemd/system.slice"
kubelet_runtime_cgroups: "{{ kube_reserved_cgroups }}/{{ container_manager }}.service"
kubelet_kubelet_cgroups: "{{ kube_reserved_cgroups }}/kubelet.service"
# Set runtime and kubelet cgroups when using cgroupfs as cgroup driver
kubelet_runtime_cgroups_cgroupfs: "/system.slice/containerd.service"
kubelet_runtime_cgroups_cgroupfs: "/system.slice/{{ container_manager }}.service"
kubelet_kubelet_cgroups_cgroupfs: "/system.slice/kubelet.service"
### fail with swap on (default true)
@@ -32,6 +32,10 @@ kubelet_secure_addresses: >-
{%- endfor -%}
# Reserve this space for kube resources
# Set to true to reserve resources for kube daemons
kube_reserved: false
kube_reserved_cgroups_for_service_slice: kube.slice
kube_reserved_cgroups: "/{{ kube_reserved_cgroups_for_service_slice }}"
kube_memory_reserved: 256Mi
kube_cpu_reserved: 100m
# kube_ephemeral_storage_reserved: 2Gi
@@ -44,6 +48,8 @@ kube_master_cpu_reserved: 200m
# Set to true to reserve resources for system daemons
system_reserved: false
system_reserved_cgroups_for_service_slice: system.slice
system_reserved_cgroups: "/{{ system_reserved_cgroups_for_service_slice }}"
system_memory_reserved: 512Mi
system_cpu_reserved: 500m
# system_ephemeral_storage_reserved: 2Gi