Add support to configure policy based routing
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
cloud-init |
Expired
|
High
|
Brett Holman |
Bug Description
When there are multiple interfaces with their own default gateways, this could result in asymmetric routing. In order to solve this, policy based routing would have to be configured.
- There is already support to configure routes in cloud-init, but it misses ability to specify routing table.
- Need ability to create routing table entries in /etc/iproute2/
- Configure routing table lookup for a given network.
Here is a sample configuration:
echo "100 eth0" >> /etc/iproute2/
echo "101 eth1" >> /etc/iproute2/
auto eth0
iface eth0 inet static
address 10.172.142.37/24
dns-nameservers 10.172.40.1
gateway 10.172.142.253
up ip rule add from 10.172.142.0/24 lookup eth0
up ip route add 10.172.142.0/24 dev eth0 table eth0
up ip route add default via 10.172.142.253 table eth0
auto eth1
iface eth1 inet static
address 10.172.144.56/24
dns-nameservers 10.172.40.1
gateway 10.172.144.253
up ip rule add from 10.172.144.0/24 lookup eth1
up ip route add 10.172.144.0/24 dev eth1 table eth1
up ip route add default via 10.172.144.253 table eth1
Changed in cloud-init: | |
assignee: | nobody → Brett Holman (holmanb) |
Hi,
Thanks for filing the bug. This is a valid scenario.