193 lines
4.9 KiB
YAML
193 lines
4.9 KiB
YAML
---
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apiVersion: v1
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kind: ConfigMap
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metadata:
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name: coredns-external
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namespace: kube-system
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data:
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Corefile: |-
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lb.homelab.lumpiasty.xyz.:53 {
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view externalv4 {
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expr type() in ['A']
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expr not hasSuffix(name(), '.in-addr.arpa.')
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}
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log . {
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class all
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}
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template IN A {
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answer "{{ .Name }} 60 IN A 139.28.40.212"
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}
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}
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.:53 {
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# Filter out anything IPv4 related
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view external {
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expr type() in ['AAAA', 'SRV', 'PTR']
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expr not hasSuffix(name(), '.in-addr.arpa.')
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}
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errors
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health {
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lameduck 5s
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}
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ready
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log . {
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class error
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}
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# Exposes kubernetes domain names under homelab.lumpiasty.xyz
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# https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/
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kubernetes homelab.lumpiasty.xyz ip6.arpa {
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pods insecure
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endpoint_pod_names
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ttl 30
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}
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# Exposes loadbalancer domain names under lb.homelab.lumpiasty.xyz
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k8s_external lb.homelab.lumpiasty.xyz {
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ttl 30
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}
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# Cache results to reduce stress on apiserver
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cache 30 {
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disable success homelab.lumpiasty.xyz
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disable denial homelab.lumpiasty.xyz
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}
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reload
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loadbalance
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}
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---
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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labels:
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k8s-app: kube-dns-external
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kubernetes.io/name: CoreDNS
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name: coredns-external
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namespace: kube-system
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spec:
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progressDeadlineSeconds: 600
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replicas: 1
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revisionHistoryLimit: 10
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selector:
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matchLabels:
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k8s-app: kube-dns-external
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strategy:
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rollingUpdate:
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maxSurge: 25%
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maxUnavailable: 1
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type: RollingUpdate
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template:
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metadata:
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labels:
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k8s-app: kube-dns-external
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spec:
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subdomain: kube-dns-external
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affinity:
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podAntiAffinity:
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preferredDuringSchedulingIgnoredDuringExecution:
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- podAffinityTerm:
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labelSelector:
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matchExpressions:
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- key: k8s-app
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operator: In
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values:
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- kube-dns
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topologyKey: kubernetes.io/hostname
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weight: 100
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containers:
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- args:
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- -conf
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- /etc/coredns/Corefile
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env:
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- name: GOMEMLIMIT
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value: 161MiB
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image: registry.k8s.io/coredns/coredns:v1.13.2
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imagePullPolicy: IfNotPresent
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livenessProbe:
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failureThreshold: 5
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httpGet:
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path: /health
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port: 8080
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scheme: HTTP
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initialDelaySeconds: 60
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periodSeconds: 10
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successThreshold: 1
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timeoutSeconds: 5
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name: coredns
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ports:
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- containerPort: 53
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name: dns
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protocol: UDP
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- containerPort: 53
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name: dns-tcp
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protocol: TCP
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- containerPort: 9153
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name: metrics
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protocol: TCP
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readinessProbe:
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failureThreshold: 3
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httpGet:
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path: /ready
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port: 8181
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scheme: HTTP
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periodSeconds: 10
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successThreshold: 1
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timeoutSeconds: 1
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resources:
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limits:
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memory: 170Mi
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requests:
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cpu: 0
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memory: 70Mi
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securityContext:
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allowPrivilegeEscalation: false
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capabilities:
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add:
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- NET_BIND_SERVICE
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drop:
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- ALL
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readOnlyRootFilesystem: true
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volumeMounts:
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- mountPath: /etc/coredns
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name: config-volume
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readOnly: true
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dnsPolicy: Default
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nodeSelector:
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kubernetes.io/os: linux
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priorityClassName: system-cluster-critical
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restartPolicy: Always
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schedulerName: default-scheduler
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serviceAccount: coredns
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tolerations:
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- effect: NoSchedule
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key: node-role.kubernetes.io/control-plane
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operator: Exists
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- effect: NoSchedule
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key: node.cloudprovider.kubernetes.io/uninitialized
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operator: Exists
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volumes:
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- configMap:
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defaultMode: 420
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items:
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- key: Corefile
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path: Corefile
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name: coredns-external
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name: config-volume
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---
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apiVersion: v1
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kind: Service
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metadata:
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namespace: kube-system
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name: kube-dns-external
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spec:
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type: LoadBalancer
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externalTrafficPolicy: Local
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ipFamilyPolicy: RequireDualStack
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selector:
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k8s-app: kube-dns-external
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ports:
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- name: dns
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port: 53
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targetPort: 53
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protocol: UDP
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- name: dns-tcp
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port: 53
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targetPort: 53
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protocol: TCP
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