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Adjust memory reservation for master nodes (#1769)

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Matthew Mosesohn 2017-10-11 19:47:42 +01:00 committed by GitHub
parent eb0dcf6063
commit eeb7274d65
3 changed files with 26 additions and 5 deletions
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11
roles/kubernetes/node/defaults/main.yml
View file

@ -20,14 +20,21 @@ kubelet_enable_cri: true
kubelet_cgroups_per_qos: true
# Set to empty to avoid cgroup creation
kubelet_enforce_node_allocatable: "\"\""
# Set false to enable sharing a pid namespace between containers in a pod.
# Note that PID namespace sharing requires docker >= 1.13.1.
kubelet_disable_shared_pid: true
# Limits for kube components and nginx load balancer app
kubelet_memory_limit: 512M
# Reserve this space for system resources
kubelet_memory_limit: 256M
kubelet_cpu_limit: 100m
# Reservation for master hosts
kubelet_master_memory_limit: 512M
kubelet_master_cpu_limit: 200m
kubelet_status_update_frequency: 10s
# Limits for kube components and nginx load balancer app
kube_proxy_memory_limit: 2000M
kube_proxy_cpu_limit: 500m
kube_proxy_memory_requests: 64M

9
roles/kubernetes/node/templates/kubelet.kubeadm.env.j2
View file

@ -30,6 +30,13 @@ KUBELET_HOSTNAME="--hostname-override={{ kube_override_hostname }}"
--docker-disable-shared-pid={{ kubelet_disable_shared_pid }} \
{% endset %}
{# Node reserved CPU/memory #}
{% if is_kube_master|bool %}
{% set kubelet_reserve %}--kube-reserved cpu={{ kubelet_master_cpu_limit }},memory={{ kubelet_master_memory_limit|regex_replace('Mi', 'M') }}{% endset %}
{% else %}
{% set kubelet_reserve %}--kube-reserved cpu={{ kubelet_cpu_limit }},memory={{ kubelet_memory_limit|regex_replace('Mi', 'M') }}{% endset %}
{% endif %}
{# DNS settings for kubelet #}
{% if dns_mode == 'kubedns' %}
{% set kubelet_args_cluster_dns %}--cluster-dns={{ skydns_server }}{% endset %}
@ -41,7 +48,7 @@ KUBELET_HOSTNAME="--hostname-override={{ kube_override_hostname }}"
{% set kubelet_args_dns %}{{ kubelet_args_cluster_dns }} --cluster-domain={{ dns_domain }} --resolv-conf={{ kube_resolv_conf }}{% endset %}
KUBELET_ARGS="{{ kubelet_args_base }} {{ kubelet_args_dns }}"
KUBELET_ARGS="{{ kubelet_args_base }} {{ kubelet_args_dns }} {{ kubelet_reserve }}"
{% if kube_network_plugin is defined and kube_network_plugin in ["calico", "canal", "flannel", "weave"] %}
KUBELET_NETWORK_PLUGIN="--network-plugin=cni --network-plugin-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin"
{% elif kube_network_plugin is defined and kube_network_plugin == "cloud" %}

11
roles/kubernetes/node/templates/kubelet.standard.env.j2
View file

@ -12,7 +12,6 @@ KUBELET_HOSTNAME="--hostname-override={{ kube_override_hostname }}"
{# Base kubelet args #}
{% set kubelet_args_base %}--pod-manifest-path={{ kube_manifest_dir }} \
--pod-infra-container-image={{ pod_infra_image_repo }}:{{ pod_infra_image_tag }} \
--kube-reserved cpu={{ kubelet_cpu_limit }},memory={{ kubelet_memory_limit|regex_replace('Mi', 'M') }} \
--node-status-update-frequency={{ kubelet_status_update_frequency }} \
--docker-disable-shared-pid={{ kubelet_disable_shared_pid }} \
{% if kube_version | version_compare('v1.6', '>=') %}
@ -36,6 +35,7 @@ KUBELET_HOSTNAME="--hostname-override={{ kube_override_hostname }}"
{# Location of the apiserver #}
{% set kubelet_args_kubeconfig %}--kubeconfig={{ kube_config_dir}}/node-kubeconfig.yaml --require-kubeconfig{% endset %}
{% if standalone_kubelet|bool %}
{# We are on a master-only host. Make the master unschedulable in this case. #}
{% if kube_version | version_compare('v1.6', '>=') %}
@ -47,6 +47,13 @@ KUBELET_HOSTNAME="--hostname-override={{ kube_override_hostname }}"
{% endif %}
{% endif %}
{# Node reserved CPU/memory #}
{% if is_kube_master|bool %}
{% set kubelet_reserve %}--kube-reserved cpu={{ kubelet_master_cpu_limit }},memory={{ kubelet_master_memory_limit|regex_replace('Mi', 'M') }}{% endset %}
{% else %}
{% set kubelet_reserve %}--kube-reserved cpu={{ kubelet_cpu_limit }},memory={{ kubelet_memory_limit|regex_replace('Mi', 'M') }}{% endset %}
{% endif %}
{# Kubelet node labels #}
{% if inventory_hostname in groups['kube-master'] %}
{% set node_labels %}--node-labels=node-role.kubernetes.io/master=true{% endset %}
@ -57,7 +64,7 @@ KUBELET_HOSTNAME="--hostname-override={{ kube_override_hostname }}"
{% set node_labels %}--node-labels=node-role.kubernetes.io/node=true{% endset %}
{% endif %}
KUBELET_ARGS="{{ kubelet_args_base }} {{ kubelet_args_dns }} {{ kubelet_args_kubeconfig }} {{ node_labels }} {% if kube_feature_gates %} --feature-gates={{ kube_feature_gates|join(',') }} {% endif %} {% if kubelet_custom_flags is string %} {{kubelet_custom_flags}} {% else %}{% for flag in kubelet_custom_flags %} {{flag}} {% endfor %}{% endif %}"
KUBELET_ARGS="{{ kubelet_args_base }} {{ kubelet_args_dns }} {{ kubelet_args_kubeconfig }} {{ kubelet_reserve }} {{ node_labels }} {% if kube_feature_gates %} --feature-gates={{ kube_feature_gates|join(',') }} {% endif %} {% if kubelet_custom_flags is string %} {{kubelet_custom_flags}} {% else %}{% for flag in kubelet_custom_flags %} {{flag}} {% endfor %}{% endif %}"
{% if kube_network_plugin is defined and kube_network_plugin in ["calico", "canal", "flannel", "weave"] %}
KUBELET_NETWORK_PLUGIN="--network-plugin=cni --network-plugin-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin"
{% elif kube_network_plugin is defined and kube_network_plugin == "weave" %}