for teeing to a new statsd host in kube

statsd-tee-initcontainer.yml

      initContainers:
      - args:
        - |
          apk add iptables
          iptables -t mangle -L
          iptables -t nat -L
          SOURCE_IP=$(ip route get 1 | head -n1 | sed 's/.* src \([^ ]*\) .*/\1/')
          iptables -t mangle -A PREROUTING -p UDP -i eth0 --dport 8125 -j TEE --gateway 127.0.0.2 -m state --state NEW,ESTABLISHED,RELATED
          iptables -t nat -A PREROUTING -i eth0 -p UDP --dport 8125 -j DNAT --to 10.0.95.199:3031 -m state --state NEW,ESTABLISHED,RELATED
          iptables -t nat -A POSTROUTING -p UDP --dport 3031 -j SNAT --to-source ${SOURCE_IP} -m state --state NEW,ESTABLISHED,RELATED
          iptables -t mangle -L
          iptables -t nat -L
        command:
        - sh
        - -euxc
        image: alpine:3.15
        imagePullPolicy: IfNotPresent
        name: init-iptables
        resources: {}
        securityContext:
          capabilities:
            add:
            - NET_ADMIN
            - NET_RAW