c12s-kubespray/roles/kubernetes-apps/ansible/templates/kubedns-autoscaler.yml.j2
Cédric de Saint Martin e3dcd96301 kubedns & kubedns-autoscaler: Stick to master nodes. (#2909)
* kubedns & kubedns-autoscaler: Stick to master nodes.

 - Tolerate only master nodes and not any NoSchedule taint
 - Pods are on different nodes
 - Pods are required to be on a master node.

* kubedns: use soft nodeAffinity.

Prefer to be on a master node, don't require.

* coredns: Stick to (different) master nodes.

     - Pods are on different nodes
     - Pods are preferred to be on a master node.
2018-08-09 10:42:53 -05:00

69 lines
2.3 KiB
Django/Jinja

---
# Copyright 2016 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: kubedns-autoscaler
namespace: kube-system
labels:
k8s-app: kubedns-autoscaler
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
spec:
template:
metadata:
labels:
k8s-app: kubedns-autoscaler
spec:
tolerations:
- effect: NoSchedule
operator: Equal
key: node-role.kubernetes.io/master
affinity:
podAntiAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
- topologyKey: "kubernetes.io/hostname"
labelSelector:
matchLabels:
k8s-app: kubedns-autoscaler
nodeAffinity:
preferredDuringSchedulingIgnoredDuringExecution:
- weight: 100
preference:
matchExpressions:
- key: node-role.kubernetes.io/master
operator: In
values:
- "true"
containers:
- name: autoscaler
image: "{{ kubednsautoscaler_image_repo }}:{{ kubednsautoscaler_image_tag }}"
resources:
requests:
cpu: "20m"
memory: "10Mi"
command:
- /cluster-proportional-autoscaler
- --namespace=kube-system
- --configmap=kubedns-autoscaler
# Should keep target in sync with cluster/addons/dns/kubedns-controller.yaml.base
- --target=Deployment/kube-dns
- --default-params={"linear":{"nodesPerReplica":{{ kubedns_nodes_per_replica }},"min":{{ kubedns_min_replicas }}}}
- --logtostderr=true
- --v=2
{% if rbac_enabled %}
serviceAccountName: cluster-proportional-autoscaler
{% endif %}