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Add DHCP client hook to update hostname. #235

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Merged
lguohan merged 3 commits into from
Feb 2, 2017
Merged

Add DHCP client hook to update hostname. #235

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9aad66b
Add DHCP client hook to update hostname.
oleksandrivantsiv Feb 1, 2017
3b4c191
Remove interface checking
oleksandrivantsiv Feb 2, 2017
e8d7ce3
Update hostname in /etc/hosts file
oleksandrivantsiv Feb 2, 2017
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1 change: 1 addition & 0 deletions build_debian.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -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
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20 changes: 20 additions & 0 deletions files/dhcp/sethostname
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Original file line number Diff line number Diff line change
@@ -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