kubespray/roles/kubernetes/preinstall/templates/dhclient_dnsupdate_rh.sh.j2

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#!/bin/sh
#
# Prepend resolver options to /etc/resolv.conf after dhclient`
# regenerates the file. See man (5) resolver for more details.
#
zdnsupdate_config() {
if [ -n "$new_domain_search" -o -n "$new_domain_name_servers" ]; then
RESOLV_CONF=$(cat /etc/resolv.conf | sed -r '/^options (timeout|attempts|ndots).*$/d')
OPTIONS="options timeout:2\noptions attempts:2\noptions ndots:{{ ndots }}"
echo -e "$RESOLV_CONF\n$OPTIONS" > /etc/resolv.conf
fi
}
zdnsupdate_restore() {
:
}