f6010f6042
Prior to this patch OVN did not validate any extra DHCP option passed to the port leading to confusion because the user of the API could just input any value and OVN would accept it (returning 200) but ignoring the option internally. This patch now adds such validations on port creation and update. This patch also sync with the latest supported DHCP options from OVN and create a map between the different names and option codes to their OVN counterpart. Closes-bug: #1874282 Change-Id: I99799e54e941cdd8da2614feecad1ef6299703fc Signed-off-by: Lucas Alvares Gomes <lucasagomes@gmail.com>
5.0 KiB
5.0 KiB
OVN supported DHCP options
This is a list of the current supported DHCP options in ML2/OVN:
IP version 4
| Option name / code | OVN value |
|---|---|
| arp-timeout | arp_cache_timeout |
| bootfile-name | bootfile_name |
| classless-static-route | classless_static_route |
| default-ttl | default_ttl |
| dns-server | dns_server |
| domain-name | domain_name |
| ethernet-encap | ethernet_encap |
| ip-forward-enable | ip_forward_enable |
| lease-time | lease_time |
| log-server | log_server |
| lpr-server | lpr_server |
| ms-classless-static-route | ms_classless_static_route |
| mtu | mtu |
| netmask | netmask |
| nis-server | nis_server |
| ntp-server | ntp_server |
| path-prefix | path_prefix |
| policy-filter | policy_filter |
| router-discovery | router_discovery |
| router | router |
| router-solicitation | router_solicitation |
| server-id | server_id |
| server-ip-address | tftp_server_address |
| swap-server | swap_server |
| T1 | T1 |
| T2 | T2 |
| tcp-ttl | tcp_ttl |
| tcp-keepalive | tcp_keepalive_interval |
| tftp-server-address | tftp_server_address |
| tftp-server | tftp_server |
| wpad | wpad |
| 1 | netmask |
| 3 | router |
| 6 | dns_server |
| 7 | log_server |
| 9 | lpr_server |
| 15 | domain_name |
| 16 | swap_server |
| 19 | ip_forward_enable |
| 21 | policy_filter |
| 23 | default_ttl |
| 26 | mtu |
| 31 | router_discovery |
| 32 | router_solicitation |
| 35 | arp_cache_timeout |
| 36 | ethernet_encap |
| 37 | tcp_ttl |
| 38 | tcp_keepalive_interval |
| 41 | nis_server |
| 42 | ntp_server |
| 51 | lease_time |
| 54 | server_id |
| 58 | T1 |
| 59 | T2 |
| 66 | tftp_server |
| 67 | bootfile_name |
| 121 | classless_static_route |
| 150 | tftp_server_address |
| 210 | path_prefix |
| 249 | ms_classless_static_route |
| 252 | wpad |
IP version 6
| Option name / code | OVN value |
|---|---|
| dns-server | dns_server |
| domain-search | domain_search |
| ia-addr | ip_addr |
| server-id | server_id |
| 2 | server_id |
| 5 | ia_addr |
| 23 | dns_server |
| 24 | domain_search |
OVN Database information
In OVN the DHCP options are stored on a table called
DHCP_Options in the OVN Northbound database.
Let's add a DHCP option to a Neutron port:
$ neutron port-update --extra-dhcp-opt opt_name='server-ip-address',opt_value='10.0.0.1' b4c3f265-369e-4bf5-8789-7caa9a1efb9c
Updated port: b4c3f265-369e-4bf5-8789-7caa9a1efb9cTo find that port in OVN we can use command below:
$ ovn-nbctl find Logical_Switch_Port name=b4c3f265-369e-4bf5-8789-7caa9a1efb9c
...
dhcpv4_options : 5f00d1a2-c57d-4d1f-83ea-09bf8be13288
dhcpv6_options : []
...For DHCP, the columns that we care about are the
dhcpv4_options and dhcpv6_options. These
columns has the uuids of entries in the DHCP_Options table
with the DHCP information for this port.
$ ovn-nbctl list DHCP_Options 5f00d1a2-c57d-4d1f-83ea-09bf8be13288
_uuid : 5f00d1a2-c57d-4d1f-83ea-09bf8be13288
cidr : "10.0.0.0/26"
external_ids : {"neutron:revision_number"="0", port_id="b4c3f265-369e-4bf5-8789-7caa9a1efb9c", subnet_id="5157ed8b-e7f1-4c56-b789-fa420098a687"}
options : {classless_static_route="{169.254.169.254/32,10.0.0.2, 0.0.0.0/0,10.0.0.1}", dns_server="{8.8.8.8}", domain_name="\"openstackgate.local\"", lease_time="43200", log_server="127.0.0.3", mtu="1442", router="10.0.0.1", server_id="10.0.0.1", server_mac="fa:16:3e:dc:57:22", tftp_server_address="10.0.0.1"}Here you can see that the option tftp_server_address has
been set in the options column. Note that, the
tftp_server_address option is the OVN translated name for
server-ip-address (option 150). Take a look at the table in
this document to find out more about the supported options and their
counterpart names in OVN.