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Simplify kubelet-config template

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Remove system|kube_master_<resource>_reserved variables.
Those variables are unnecessary because users can simply use the
variables in group_vars if they which to differentiate control plane
nodes from other nodes.

Set conservative defaults for ephemeral-storage and pids for both kube
and system reserved resources.
This commit is contained in:
Max Gautier
2023-11-23 17:18:47 +01:00
parent 872d717105
commit 1bc61c9f35
2 changed files with 17 additions and 67 deletions
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26
roles/kubernetes/node/defaults/main.yml
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@@ -37,29 +37,19 @@ kubelet_secure_addresses: "localhost link-local {{ kube_pods_subnet }} {{ kube_n
# Whether to run kubelet and container-engine daemons in a dedicated cgroup. (Not required for resource reservations).
kube_reserved: false
kube_reserved_cgroups: "/{{ kube_reserved_cgroups_for_service_slice }}"
kube_memory_reserved: 256Mi
kube_cpu_reserved: 100m
# kube_ephemeral_storage_reserved: 2Gi
# kube_pid_reserved: "1000"
# Reservation for control plane hosts
kube_master_memory_reserved: 512Mi
kube_master_cpu_reserved: 200m
# kube_master_ephemeral_storage_reserved: 2Gi
# kube_master_pid_reserved: "1000"
kube_memory_reserved: "256Mi"
kube_cpu_reserved: "100m"
kube_ephemeral_storage_reserved: "500Mi"
kube_pid_reserved: "1000"
# 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
# system_pid_reserved: "1000"
# Reservation for control plane hosts
system_master_memory_reserved: 256Mi
system_master_cpu_reserved: 250m
# system_master_ephemeral_storage_reserved: 2Gi
# system_master_pid_reserved: "1000"
system_memory_reserved: "512Mi"
system_cpu_reserved: "500m"
system_ephemeral_storage_reserved: "500Mi"
system_pid_reserved: 1000
## Eviction Thresholds to avoid system OOMs
# https://kubernetes.io/docs/tasks/administer-cluster/reserve-compute-resources/#eviction-thresholds