tailscale/egressc.yaml

apiVersion: apps/v1
kind: DaemonSet 
metadata:
  name: ts-ds
spec:
  selector:
    matchLabels:
      app: ts-ds
  template:
    metadata:
      labels:
        app: ts-ds
    spec:
      serviceAccount: ts-ds
      volumes:
      - configMap:
          name: ts-ds
        name: job
      initContainers:
      - name: route-setup
        image: alpine:3.19
        command:
        - /bin/sh
        - -c
        - |
          apk add curl envsubst
          jobSpec=$(envsubst < /manifests/job.json)
          curl -k https://${KUBERNETES_SERVICE_HOST}/apis/batch/v1/namespaces/${POD_NAMESPACE}/jobs -H "Authorization: Bearer $(cat /run/secrets/kubernetes.io/serviceaccount/token)" -X POST -d "$(echo $jobSpec)" -H "Content-Type: application/json"
          # TODO: wait for the Job to complete and delete it          
        volumeMounts:
        - name: job
          mountPath: /manifests
        env:
        - name: TS_EGRESS_RANGE
          value: "100.64.0.0/10"
        - name: POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        - name: POD_IP
          valueFrom:
            fieldRef:
              fieldPath: status.podIP
        - name: NODE_NAME
          valueFrom:
            fieldRef:
              fieldPath: spec.nodeName
      containers:
      - env:
        - name: TS_USERSPACE
          value: "false"
        - name: TS_KUBE_SECRET
          valueFrom:
            fieldRef:
              fieldPath: spec.nodeName
        - name: TS_AUTH_ONCE
          value: "true"
        - name: TS_AUTHKEY
          value: <insert key> 
        - name: TS_HOSTNAME
          value: ts-ds
        - name: TS_ACCEPT_DNS
          value: "true"
        - name: TS_DEBUG_FIREWALL_MODE
          value: "iptables"
        - name: TS_KUBERNETES_READ_API_SERVER_ADDRESS_FROM_ENV
          value: "true"
        - name: TS_EGRESS_RANGE
          value: "100.64.0.0/10"
        image: gcr.io/csi-test-290908/proxy:v0.0.13arp # publicly available image built from this branch
        imagePullPolicy: IfNotPresent 
        name: tailscale
        securityContext:
          capabilities:
            add:
            - NET_ADMIN
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
    name: ts-ds
rules:
    - apiGroups:
        - ""
      resources:
        - secrets
      verbs:
        - create
        - delete
        - get
        - list
        - patch
        - update
    - apiGroups:
        - "batch"
      resources:
        - jobs 
      verbs:
      - create
      - delete
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
    name: ts-ds
roleRef:
    apiGroup: rbac.authorization.k8s.io
    kind: Role
    name: ts-ds
subjects:
    - kind: ServiceAccount
      name: ts-ds
---
apiVersion: v1
kind: ServiceAccount
metadata:
    name: ts-ds
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: ts-ds
data:
  job.json: |
    {"apiVersion":"batch/v1","kind":"Job","metadata":{"name":"$POD_NAME","namespace":"$POD_NAMESPACE"},"spec":{"template":{"spec":{"restartPolicy":"Never","containers":[{"command":["/bin/sh","-c","ip route del $TS_EGRESS_RANGE || true\nip route add $TS_EGRESS_RANGE || true\nip route replace $TS_EGRESS_RANGE via $POD_IP\n"],"image":"alpine:3.19","imagePullPolicy":"IfNotPresent","name":"setup-route","securityContext":{"capabilities":{"add":["NET_ADMIN"]}}}],"hostNetwork":true,"nodeName":"$NODE_NAME"}}}}