aurore/ansible
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dhcp: implement failover peer configuration

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Yohaï-Eliel BERREBY 2020-04-06 14:41:34 +02:00
parent 2a0a2e2ac6
commit 34b448faec
4 changed files with 37 additions and 15 deletions
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4
group_vars/dhcp/vars.yml Normal file
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@ -0,0 +1,4 @@
---
dhcp_failover:
primary_host: dhcp-{{ apartment_block }}.adm.auro.re
secondary_host: dhcp-{{ apartment_block }}-backup.adm.auro.re

4
group_vars/pacaterie/dhcp.yml
View file

@ -5,7 +5,3 @@ subnet_ids:
ap: 142 ap: 142
users_wired: 20 users_wired: 20
users_wifi: 21 users_wifi: 21
failover:
own_address: 10.128.2.254
peer_address: 10.128.2.154

4
hosts
View file

@ -150,9 +150,9 @@ gs_pve
[dhcp] [dhcp]
dhcp-fleming.adm.auro.re dhcp-fleming.adm.auro.re
#dhcp-fleming-backup.adm.auro.re dhcp-fleming-backup.adm.auro.re
dhcp-pacaterie.adm.auro.re dhcp-pacaterie.adm.auro.re
#dhcp-pacaterie-backup.adm.auro.re dhcp-pacaterie-backup.adm.auro.re
#dhcp-edc.adm.auro.re #dhcp-edc.adm.auro.re
#dhcp-gs.adm.auro.re #dhcp-gs.adm.auro.re

40
roles/isc-dhcp-server/templates/dhcp/dhcpd.conf.j2
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@ -1,5 +1,5 @@
# dhcpd.conf # dhcpd.conf
{{ ansible_managed }} # {{ ansible_managed }}
default-lease-time 86400; default-lease-time 86400;
max-lease-time 86400; max-lease-time 86400;
@ -24,6 +24,7 @@ authoritative;
# Use this to send dhcp log messages to a different log file (you also # Use this to send dhcp log messages to a different log file (you also
# have to hack syslog.conf to complete the redirection). # have to hack syslog.conf to complete the redirection).
# XXX: This was enabled in one building and disabled in another.
#log-facility local7; #log-facility local7;
@ -65,21 +66,42 @@ subnet 10.{{ subnet_ids.users_wifi }}.0.0 netmask 255.255.0.0 {
include "/var/local/re2o-services/dhcp/generated/dhcp.wifi.{{ apartment_block }}.auro.re.list"; include "/var/local/re2o-services/dhcp/generated/dhcp.wifi.{{ apartment_block }}.auro.re.list";
pool { pool {
range 10.{{ subnet_ids.users_wifi }}.8.0 10.{{ subnet_ids.users_wired }}.10.255; range 10.{{ subnet_ids.users_wifi }}.8.0 10.{{ subnet_ids.users_wifi }}.10.255;
{% if failover is defined %} {% if dhcp_failover is defined %}
failover peer "dhcp-failover" { failover peer "dhcp-failover";
{% endif %}
}
}
{% if dhcp_failover is defined %}
failover peer "dhcp-failover" {
{% if inventory_hostname == dhcp_failover.primary_host %}
primary; primary;
split 128;
# MCLT = Maximum Client Lead Time.
# Must be specified on the primary, forbidden on the secondary.
mclt 3600; mclt 3600;
address {{ failover.own_address }};
# Address or DNS name on which this node listens for connections
# from its failover peer.
address {{ dhcp_failover.primary_host }};
peer address {{ dhcp_failover.secondary_host }};
{% endif %}
{% if inventory_hostname == dhcp_failover.secondary_host %}
secondary;
# Address and peer address are reversed on the secondary node.
address {{ dhcp_failover.secondary_host }};
peer address {{ dhcp_failover.primary_host }};
{% endif %}
# The following options can be shared between primary and
# secondary failover peers.
port 647; port 647;
peer address {{ failover.peer_address }};
peer port 647; peer port 647;
split 128;
max-response-delay 30; max-response-delay 30;
max-unacked-updates 10; max-unacked-updates 10;
load balance max seconds 3; load balance max seconds 3;
} }
{% endif %} {% endif %}
}
}