From 040dda37edd50a6cd975ec360decaf59a068efb4 Mon Sep 17 00:00:00 2001 From: Mikael Johansson <mik.json@gmail.com> Date: Thu, 10 Sep 2020 12:49:44 +0200 Subject: [PATCH] Add comment clarifying network allocation and sizes (#6607) * 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> --- .../group_vars/k8s-cluster/k8s-cluster.yml | 16 ++++++++++++-- roles/kubespray-defaults/defaults/main.yaml | 22 +++++++++++-------- 2 files changed, 27 insertions(+), 11 deletions(-) diff --git a/inventory/sample/group_vars/k8s-cluster/k8s-cluster.yml b/inventory/sample/group_vars/k8s-cluster/k8s-cluster.yml index e886398fc..9041230bb 100644 --- a/inventory/sample/group_vars/k8s-cluster/k8s-cluster.yml +++ b/inventory/sample/group_vars/k8s-cluster/k8s-cluster.yml @@ -95,8 +95,20 @@ kube_service_addresses: 10.233.0.0/18 kube_pods_subnet: 10.233.64.0/18 # internal network node size allocation (optional). This is the size allocated -# to each node on your network. With these defaults you should have -# room for 4096 nodes with 254 pods per node. +# to each node for pod IP address allocation. Note that the number of pods per node is +# 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 # The port the API Server will be listening on. diff --git a/roles/kubespray-defaults/defaults/main.yaml b/roles/kubespray-defaults/defaults/main.yaml index 122e9775f..977179afb 100644 --- a/roles/kubespray-defaults/defaults/main.yaml +++ b/roles/kubespray-defaults/defaults/main.yaml @@ -174,16 +174,20 @@ kube_service_addresses: 10.233.0.0/18 kube_pods_subnet: 10.233.64.0/18 # internal network node size allocation (optional). This is the size allocated -# to each node on your network. With these defaults you should have -# room for 64 nodes with 254 pods per node. -# Example: Up to 256 nodes, 100 pods per node (/16 network): -# - kube_service_addresses: 10.233.0.0/17 -# - kube_pods_subnet: 10.233.128.0/17 -# - kube_network_node_prefix: 25 -# Example: Up to 4096 nodes, 100 pods per node (/12 network): -# - kube_service_addresses: 10.192.0.0/13 -# - kube_pods_subnet: 10.200.0.0/13 +# to each node for pod IP address allocation. Note that the number of pods per node is +# 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 # The virtual cluster IP, real host IPs and ports the API Server will be -- GitLab