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Add DHCP client hook to update hostname. (#235)

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* Add DHCP client hook to update hostname.

* Remove interface checking

* Update hostname in /etc/hosts file
This commit is contained in:
Oleksandr Ivantsiv 2017-02-02 21:19:48 +02:00 committed by lguohan
parent 4cd3d31946
commit 793b842d60
2 changed files with 21 additions and 0 deletions
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1
build_debian.sh
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@ -240,6 +240,7 @@ iface eth0 inet dhcp
EOF
sudo cp files/dhcp/rfc3442-classless-routes $FILESYSTEM_ROOT/etc/dhcp/dhclient-exit-hooks.d
sudo cp files/dhcp/sethostname $FILESYSTEM_ROOT/etc/dhcp/dhclient-exit-hooks.d/
if [ -f sonic_debian_extension.sh ]; then
./sonic_debian_extension.sh $FILESYSTEM_ROOT

20
files/dhcp/sethostname Normal file
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@ -0,0 +1,20 @@
#!/bin/bash
# This script is to update hostname of the system.
if [ "$reason" != BOUND ] && [ "$reason" != RENEW ] \
&& [ "$reason" != REBIND ] && [ "$reason" != REBOOT ]
then
exit 0
fi
current_host_name=`hostname -s`
if [ "$current_host_name" != "$new_host_name" ]
then
echo $new_host_name > /etc/hostname
line_to_replace=`grep 127.0.0.1.*$current_host_name /etc/hosts`
new_line=`echo $line_to_replace | sed "s/$current_host_name/$new_host_name/"`
sed -i "s/$line_to_replace/$new_line/" /etc/hosts
hostname -F /etc/hostname
fi