fake hostname for running kubelet with asymmetric name resolution

kubelet_hostname

#!/bin/sh

# mv /bin/hostname /bin/hostname.real
# install $0 as /bin/hostname (a+rx)

TARGET="kubelet"

IFACE=eth0

PARENT=$(ps -oucmd= $PPID)

if [ "$PARENT" = "$TARGET" ]; then
   IP=$(ip addr show dev $IFACE | grep 'inet ' | sed 's,.*inet \(.*\)/.*,\1,')
   echo $IP
 else
   exec hostname.real $*
fi