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The current DHCP server implementation comes with options (see below) which
allow the user to pass in any arbitrary option(s) in a verbatim way which will
manifest in dhcpd.conf.
The options are:
* set service dhcp-server global-parameters
* set service dhcp-server shared-network-name foo shared-network-parameters
* set service dhcp-server shared-network-name foo subnet 192.0.2.0/25
subnet-parameters
* set service dhcp-server shared-network-name foo subnet 192.0.2.0/25
static-mapping ff static-mapping-parameters
Having an invalid configuration will yield:
vyos@vyos# commit
[ service dhcp-server ]
Configuration file errors encountered - check your options!
[[service dhcp-server]] failed
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A reference to a dictionary key obtained by a for loop can not be used to update
values inside that dictionaries key. You must use the original path to the
nested dictionaries key.
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Introduced in commit e46def834483e ("dhcp: T3100: re-add range slicing support
when exclude addresses are used") by not obeying the move from list to dict
and still relying on the old list names variables.
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Running ISC DHCP server as backend server for multiple pools served to relay
agents requires DHCPd to explicitly listen on give interfaces or a "transit"
subnet declaration facing the network where we receive the DHCPREQ messages on.
This implements a new "listen-address" CLI node, the given address is validated
if it is assigned to the system and upon success, a proper "subnet { }" statement
is added into dhcpd.conf
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Support was not yet present after the rewrite from commit 84b7ade2 ("dhcp: T3100:
migrate server configuration to get_config_dict()")
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airbag must now be explicitly installed.
the patch also allow to fully disables the installation of the logging
code at setup (and not just installing and doing nothing)
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Commit bc68244 ("dhcp-server: T2185: migrate from SysVinit to systemd")
migrated the DHCP subsystem to systemd, necessary directories in the volatile
/run directory have not been created.
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Commit bc68244 ("dhcp-server: T2185: migrate from SysVinit to systemd") migrated
the DHCP subsystem to systemd, but on the test-system there was still the old
configuration file present not triggering this condition.
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convert all call to jinja to use template.render
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os.system does print the ouput of the command, run() does not.
A new function called call() does the printing and return the error code.
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As little change a possible but the function call
The behaviour should be totally unchanged.
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Previous one DHCP configuration error message does not point that DHCP server work only with primary IP address on interface.
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There was a bug when refactoring this with commits 5848a4d ("dhcp-server:
T1707: remove DHCP static-mappings from address pool") and 1182b44
("dhcp-server: T1707: bugfix on subsequent DHCP exclude addresses") that when
a static address assignemnt was using the last IP address from the specified
range.
This triggered the following error:
"DHCP range stop address x must be greater or equal to the range start
address y!"
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Previously when static-mappings have been created the address was still within
the DHCP pool resulting in log entries as follows:
dhcpd: Dynamic and static leases present for 192.0.2.51
dhcpd: Remove host declaration DMZ_PC2 or remove 192.0.2.51
dhcpd: from the dynamic address pool for DMZ
(cherry picked from commit 6f954ab56768af9a07d8a1dc086f54ddefa58da7)
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(cherry picked from commit bdf890cca40157b3f2a2386685e043e0fa220fac)
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Moved the code for splicing a DHCP range into its dedicated function as this
will later be required again. Having subsequent DHCP exclude addresses
e.g. 192.0.2.70 and 192.0.2.71 did not work as the previous algorithm
created a range whose start address was after the end address.
(cherry picked from commit 0f0f9f2835cf85c1fd3652ec83368528754764cd)
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when a non-unique subnet is found.
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- T1435: dhcp-server: make ip-address optional in static-mapping
- remove [REQUIRED] from dhcpv6-server static-mapping identifier and ipv6-address
- verify if static-mapping ipv6-address is in subnet
- make help and error messages in conf-mode more descriptive
- remove regex ^$ anchors (implied in re.fullmatch)
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WPAD url could be configured by CLI but the generated config was not
understood by ISC dhcp - caused by infalid if {} statement resulting in
a missing "option wpad-url code 252 = text;" block.
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subnet-parameters were not added to the resulting configuration.
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Move the on commit in a generated dhcpd.conf into the shared-network
to fix hostfile-update not working.
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Commit 91c3b8bdd9 ("dhcp_server.py: cleanup") did not only cleanup parts
of the code but in addition added support for DHCP failover. That support
could lead to an empty pool {} statement if the subnet declaration only had
static address assignments but no range at all.
---<snip>---
dhcpd: /etc/dhcp/dhcpd.conf line 70: Pool declaration with no address
range.
dhcpd: }
dhcpd: ^
dhcpd: Pool declarations must always contain at least
dhcpd: one range statement.
---</snip>---
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Commit 067a6b1524 ("vyos: package: extend validator by is_subnet_connected()")
added a mechanism to probe if a given IPv4/IPv6 address is connected to any
interface on the subnet - or is part of this subnet.
We now use this call instead of producing more and more biler-plate code!
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verify()
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If there was yet no lease file present, dhcpd refused to start. Lease
file is created if required. Ususally this is handeled by the isc-dhcp-server
init script but we use our own path (for persistance) of that file.
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This commit changes in addtion the DHCP server config syntax as defined
in "T782: Cleanup dhcp-server configuration".
Replace boolean parameter from the folowing nodes and make it valueless.
This requires a migration script which is tracked with this task
* set service dhcp-server shared-network-name <xyz> subnet 172.31.0.0/24
ip-forwarding enable (true|false)
* set service dhcp-server shared-network-name <xyz> authoritative (true|false)
* set service dhcp-server disabled (true|false)
* set service dhcp-server dynamic-dns-update enable (true|fals)
* set service dhcp-server hostfile-update (enable|disable)
Replace the nested start/stop ip address from "subnet 172.31.0.0/24 start
172.31.0.101 stop 172.31.0.149" to "subnet 172.31.0.0/24 range <foo> start" and
"subnet 172.31.0.0/24 range <foo> stop" where foo can be any character or number.
In addition the vyatta-cfg-dhcp-server package used it's own init/config file
for service startup. This has been migrated to the vanilla Debian files.
Copy 'on-dhcp-event.sh' from vyatta-cfg-shcp-server package commit 4749e648bca6.
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