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@rajeshisnepali
Created January 28, 2020 17:18
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modify /etc/hosts [docker container networks]
#!/usr/bin/env bash
#format = sudo manage-etc-hosts.sh <docker_webserver_container_name> <domain>
set -eu
if [ "$EUID" -ne 0 ]
then echo "Please run as root"
exit
fi
# PATH TO YOUR HOSTS FILE
: ${ETC_HOSTS="/etc/hosts"}
# DEFAULT IP FOR HOSTNAME
DEFAULT_IP=127.0.0.1
VERBOSE=true
function remove() {
local HOSTNAME=$1
local HOST_REGEX="\(\s\+\)${HOSTNAME}\s*$"
local HOST_LINE="$(grep -e "${HOST_REGEX}" ${ETC_HOSTS})"
if [ -n "${HOST_LINE}" ]; then
[ ${VERBOSE} == true ] && echo "${HOSTNAME} Found in your ${ETC_HOSTS}, Removing now..."
sed -i -e "s/${HOST_REGEX}/\1/g" -e "/^[^#][0-9\.]\+\s\+$/d" ${ETC_HOSTS}
else
[ ${VERBOSE} == true ] && echo "${HOSTNAME} was not found in your ${ETC_HOSTS}";
fi
}
function add() {
local HOSTNAME=$1
local IP=${2:-${DEFAULT_IP}}
local HOST_REGEX="\(\s\+\)${HOSTNAME}\s*$"
local HOST_LINE="$(grep -e "${HOST_REGEX}" ${ETC_HOSTS})"
if [ -n "${HOST_LINE}" ]; then
[ ${VERBOSE} == true ] && echo "${HOSTNAME} already exists : ${HOST_LINE}"
else
[ ${VERBOSE} == true ] && echo "Adding ${HOSTNAME} to your ${ETC_HOSTS}";
echo -e "${IP}\t${HOSTNAME}" >> ${ETC_HOSTS}
[ ${VERBOSE} == true ] && echo -e "${HOSTNAME} was added succesfully \n ${HOST_LINE}";
# nscd -i hosts
fi
}
function modify-host() {
ip="$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $1)"
remove $2
add $2 $ip
}
# Execute
$@
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