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Add comment clarifying network allocation and sizes (#6607)

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* Add comment from roles/kubespray-defaults/defaults/main.yaml clarifying network allocation and sizes

Signed-off-by: Mikael Johansson <mik.json@gmail.com>

* Rewrite of the comment and added new examples

Signed-off-by: Mikael Johansson <mik.json@gmail.com>
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Mikael Johansson 2020-09-10 12:49:44 +02:00 committed by GitHub
parent a99ba3bb16
commit 040dda37ed
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2 changed files with 27 additions and 11 deletions
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16
inventory/sample/group_vars/k8s-cluster/k8s-cluster.yml
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@ -95,8 +95,20 @@ kube_service_addresses: 10.233.0.0/18
kube_pods_subnet: 10.233.64.0/18 kube_pods_subnet: 10.233.64.0/18
# internal network node size allocation (optional). This is the size allocated # internal network node size allocation (optional). This is the size allocated
# to each node on your network. With these defaults you should have # to each node for pod IP address allocation. Note that the number of pods per node is
# room for 4096 nodes with 254 pods per node. # also limited by the kubelet_max_pods variable which defaults to 110.
#
# Example:
# Up to 64 nodes and up to 254 or kubelet_max_pods (the lowest of the two) pods per node:
# - kube_pods_subnet: 10.233.64.0/18
# - kube_network_node_prefix: 24
# - kubelet_max_pods: 110
#
# Example:
# Up to 128 nodes and up to 126 or kubelet_max_pods (the lowest of the two) pods per node:
# - kube_pods_subnet: 10.233.64.0/18
# - kube_network_node_prefix: 25
# - kubelet_max_pods: 110
kube_network_node_prefix: 24 kube_network_node_prefix: 24
# The port the API Server will be listening on. # The port the API Server will be listening on.

22
roles/kubespray-defaults/defaults/main.yaml
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@ -174,16 +174,20 @@ kube_service_addresses: 10.233.0.0/18
kube_pods_subnet: 10.233.64.0/18 kube_pods_subnet: 10.233.64.0/18
# internal network node size allocation (optional). This is the size allocated # internal network node size allocation (optional). This is the size allocated
# to each node on your network. With these defaults you should have # to each node for pod IP address allocation. Note that the number of pods per node is
# room for 64 nodes with 254 pods per node. # also limited by the kubelet_max_pods variable which defaults to 110.
# Example: Up to 256 nodes, 100 pods per node (/16 network): #
# - kube_service_addresses: 10.233.0.0/17 # Example:
# - kube_pods_subnet: 10.233.128.0/17 # Up to 64 nodes and up to 254 or kubelet_max_pods (the lowest of the two) pods per node:
# - kube_network_node_prefix: 25 # - kube_pods_subnet: 10.233.64.0/18
# Example: Up to 4096 nodes, 100 pods per node (/12 network): # - kube_network_node_prefix: 24
# - kube_service_addresses: 10.192.0.0/13 # - kubelet_max_pods: 110
# - kube_pods_subnet: 10.200.0.0/13 #
# Example:
# Up to 128 nodes and up to 126 or kubelet_max_pods (the lowest of the two) pods per node:
# - kube_pods_subnet: 10.233.64.0/18
# - kube_network_node_prefix: 25 # - kube_network_node_prefix: 25
# - kubelet_max_pods: 110
kube_network_node_prefix: 24 kube_network_node_prefix: 24
# The virtual cluster IP, real host IPs and ports the API Server will be # The virtual cluster IP, real host IPs and ports the API Server will be