packer-cn/examples/alicloud/chef/user_data.sh

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HOSTNAME=`ifconfig eth1|grep 'inet addr'|cut -d ":" -f2|cut -d " " -f1`
if [ not $HOSTNAME ] ; then
HOSTNAME=`ifconfig eth0|grep 'inet addr'|cut -d ":" -f2|cut -d " " -f1`
fi
hostname $HOSTNAME
chef-server-ctl reconfigure