kubespray/roles/kubernetes-apps/ansible/templates/nodelocaldns-daemonset.yml.j2

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apiVersion: apps/v1
kind: DaemonSet
metadata:
name: nodelocaldns
namespace: kube-system
labels:
k8s-app: kube-dns
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
spec:
selector:
matchLabels:
k8s-app: nodelocaldns
template:
metadata:
labels:
k8s-app: nodelocaldns
annotations:
prometheus.io/scrape: 'true'
prometheus.io/port: '9253'
spec:
{% if kube_version is version('v1.11.1', '>=') %}
priorityClassName: system-cluster-critical
{% endif %}
serviceAccountName: nodelocaldns
hostNetwork: true
dnsPolicy: Default # Don't use cluster DNS.
tolerations:
- effect: NoSchedule
operator: "Exists"
- effect: NoExecute
operator: "Exists"
- key: "CriticalAddonsOnly"
operator: "Exists"
containers:
- name: node-cache
image: "{{ nodelocaldns_image_repo }}:{{ nodelocaldns_image_tag }}"
resources:
limits:
memory: {{ nodelocaldns_memory_limit }}
requests:
cpu: {{ nodelocaldns_cpu_requests }}
memory: {{ nodelocaldnsdns_memory_requests }}
args: [ "-localip", "{{ nodelocaldns_ip }}", "-conf", "/etc/coredns/Corefile" ]
securityContext:
privileged: true
ports:
- containerPort: 53
name: dns
protocol: UDP
- containerPort: 53
name: dns-tcp
protocol: TCP
- containerPort: 9253
name: metrics
protocol: TCP
livenessProbe:
httpGet:
host: {{ nodelocaldns_ip }}
path: /health
port: 8080
scheme: HTTP
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 10
readinessProbe:
httpGet:
host: {{ nodelocaldns_ip }}
path: /health
port: 8080
scheme: HTTP
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 10
volumeMounts:
- name: config-volume
mountPath: /etc/coredns
- name: xtables-lock
mountPath: /run/xtables.lock
volumes:
- name: config-volume
configMap:
name: nodelocaldns
items:
- key: Corefile
path: Corefile
- name: xtables-lock
hostPath:
path: /run/xtables.lock
type: FileOrCreate
# Minimize downtime during a rolling upgrade or deletion; tell Kubernetes to do a "force
# deletion": https://kubernetes.io/docs/concepts/workloads/pods/pod/#termination-of-pods.
terminationGracePeriodSeconds: 0
updateStrategy:
rollingUpdate:
maxUnavailable: {{ serial | default('20%') }}
type: RollingUpdate