** Changed in: isc-dhcp (Ubuntu)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1894172
Title:
isc-dhcp-server using wrong env variable for INTERFACES
Status in isc-dhcp package in Ubuntu:
Fix Released
Status in isc-dhcp source package in Bionic:
Confirmed
Status in isc-dhcp source package in Focal:
Confirmed
Status in isc-dhcp source package in Groovy:
Confirmed
Bug description:
When checking isc-dhcp-server unit file I saw isc-dhcp-server is being
started by:
ConditionPathExists=/etc/default/isc-dhcp-server
ConditionPathExists=|/etc/ltsp/dhcpd.conf
ConditionPathExists=|/etc/dhcp/dhcpd.conf
[Service]
EnvironmentFile=/etc/default/isc-dhcp-server
RuntimeDirectory=dhcp-server
# The leases files need to be root:dhcpd even when dropping privileges
ExecStart=/bin/sh -ec '\
CONFIG_FILE=/etc/dhcp/dhcpd.conf; \
if [ -f /etc/ltsp/dhcpd.conf ]; then CONFIG_FILE=/etc/ltsp/dhcpd.conf;
fi; \
[ -e /var/lib/dhcp/dhcpd.leases ] || touch /var/lib/dhcp/dhcpd.leases; \
chown root:dhcpd /var/lib/dhcp /var/lib/dhcp/dhcpd.leases; \
chmod 775 /var/lib/dhcp ; chmod 664 /var/lib/dhcp/dhcpd.leases; \
exec dhcpd -user dhcpd -group dhcpd -f -4 -pf /run/dhcp-server/dhcpd.pid
-cf $CONFIG_FILE $INTERFACES'
But the /etc/default/isc-dhcp-server file sets $INTERFACESv4 and
$INTERFACESv6.
This has only been working because cmdline sets -4 and subnet
declaration in dhcpd.conf file makes dhcp-server to bind to the
correct interfaces, as it looks like.
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