mirror of
https://github.com/notherealmarco/coredns-deployment.git
synced 2025-03-14 14:16:16 +01:00
aba0245609
* Run CoreDNS in Docker only with CAP_NET_BIND_SERVICE, drop all other (root) privileges. Run filesystem of container and config in read-only mode. * Run CoreDNS in Kubernetes only with CAP_NET_BIND_SERVICE, drop all other (root) privileges. Run filesystem of container and config in read-only mode.
155 lines
3.2 KiB
YAML
155 lines
3.2 KiB
YAML
apiVersion: v1
|
|
kind: ServiceAccount
|
|
metadata:
|
|
name: coredns
|
|
namespace: kube-system
|
|
---
|
|
apiVersion: rbac.authorization.k8s.io/v1beta1
|
|
kind: ClusterRole
|
|
metadata:
|
|
labels:
|
|
kubernetes.io/bootstrapping: rbac-defaults
|
|
name: system:coredns
|
|
rules:
|
|
- apiGroups:
|
|
- ""
|
|
resources:
|
|
- endpoints
|
|
- services
|
|
- pods
|
|
- namespaces
|
|
verbs:
|
|
- list
|
|
- watch
|
|
---
|
|
apiVersion: rbac.authorization.k8s.io/v1beta1
|
|
kind: ClusterRoleBinding
|
|
metadata:
|
|
annotations:
|
|
rbac.authorization.kubernetes.io/autoupdate: "true"
|
|
labels:
|
|
kubernetes.io/bootstrapping: rbac-defaults
|
|
name: system:coredns
|
|
roleRef:
|
|
apiGroup: rbac.authorization.k8s.io
|
|
kind: ClusterRole
|
|
name: system:coredns
|
|
subjects:
|
|
- kind: ServiceAccount
|
|
name: coredns
|
|
namespace: kube-system
|
|
---
|
|
apiVersion: v1
|
|
kind: ConfigMap
|
|
metadata:
|
|
name: coredns
|
|
namespace: kube-system
|
|
data:
|
|
Corefile: |
|
|
.:53 {
|
|
errors
|
|
health
|
|
kubernetes CLUSTER_DOMAIN REVERSE_CIDRS {
|
|
pods insecure
|
|
upstream
|
|
fallthrough in-addr.arpa ip6.arpa
|
|
}
|
|
prometheus :9153
|
|
proxy . /etc/resolv.conf
|
|
cache 30
|
|
reload
|
|
}
|
|
---
|
|
apiVersion: extensions/v1beta1
|
|
kind: Deployment
|
|
metadata:
|
|
name: coredns
|
|
namespace: kube-system
|
|
labels:
|
|
k8s-app: kube-dns
|
|
kubernetes.io/name: "CoreDNS"
|
|
spec:
|
|
replicas: 2
|
|
strategy:
|
|
type: RollingUpdate
|
|
rollingUpdate:
|
|
maxUnavailable: 1
|
|
selector:
|
|
matchLabels:
|
|
k8s-app: kube-dns
|
|
template:
|
|
metadata:
|
|
labels:
|
|
k8s-app: kube-dns
|
|
spec:
|
|
serviceAccountName: coredns
|
|
tolerations:
|
|
- key: "CriticalAddonsOnly"
|
|
operator: "Exists"
|
|
containers:
|
|
- name: coredns
|
|
image: coredns/coredns:1.1.3
|
|
imagePullPolicy: IfNotPresent
|
|
args: [ "-conf", "/etc/coredns/Corefile" ]
|
|
volumeMounts:
|
|
- name: config-volume
|
|
mountPath: /etc/coredns
|
|
readOnly: true
|
|
ports:
|
|
- containerPort: 53
|
|
name: dns
|
|
protocol: UDP
|
|
- containerPort: 53
|
|
name: dns-tcp
|
|
protocol: TCP
|
|
- containerPort: 9153
|
|
name: metrics
|
|
protocol: TCP
|
|
securityContext:
|
|
allowPrivilegeEscalation: false
|
|
capabilities:
|
|
add:
|
|
- NET_BIND_SERVICE
|
|
drop:
|
|
- all
|
|
readOnlyRootFilesystem: true
|
|
livenessProbe:
|
|
httpGet:
|
|
path: /health
|
|
port: 8080
|
|
scheme: HTTP
|
|
initialDelaySeconds: 60
|
|
timeoutSeconds: 5
|
|
successThreshold: 1
|
|
failureThreshold: 5
|
|
dnsPolicy: Default
|
|
volumes:
|
|
- name: config-volume
|
|
configMap:
|
|
name: coredns
|
|
items:
|
|
- key: Corefile
|
|
path: Corefile
|
|
---
|
|
apiVersion: v1
|
|
kind: Service
|
|
metadata:
|
|
name: kube-dns
|
|
namespace: kube-system
|
|
annotations:
|
|
prometheus.io/scrape: "true"
|
|
labels:
|
|
k8s-app: kube-dns
|
|
kubernetes.io/cluster-service: "true"
|
|
kubernetes.io/name: "CoreDNS"
|
|
spec:
|
|
selector:
|
|
k8s-app: kube-dns
|
|
clusterIP: CLUSTER_DNS_IP
|
|
ports:
|
|
- name: dns
|
|
port: 53
|
|
protocol: UDP
|
|
- name: dns-tcp
|
|
port: 53
|
|
protocol: TCP
|