k8s.github.io

Pod Networking

• Take me to Lecture

In this section, we will take a look at Pod Networking

• To add bridge network on each node

node01

$ ip link add v-net-0 type bridge

node02

$ ip link add v-net-0 type bridge

node03

$ ip link add v-net-0 type bridge

• Currently it’s down, turn it up.

node01

$ ip link set dev v-net-0 up

node02

$ ip link set dev v-net-0 up

node03

$ ip link set dev v-net-0 up

• Set the IP Addr for the bridge interface

node01

$ ip addr add 10.244.1.1/24 dev v-net-0

node02

$ ip addr add 10.244.2.1/24 dev v-net-0

node03

$ ip addr add 10.244.3.1/24 dev v-net-0

• Check the reachability

$ ping 10.244.2.2
Connect: Network is unreachable

• Add route in the routing table

  $ ip route add 10.244.2.2 via 192.168.1.12
  

node01 ``` $ ip route add 10.244.2.2 via 192.168.1.12

$ ip route add 10.244.3.2 via 192.168.1.13

> node02

$ ip route add 10.244.1.2 via 192.168.1.11

$ ip route add 10.244.3.2 via 192.168.1.13

> node03

$ ip route add 10.244.1.2 via 192.168.1.11

$ ip route add 10.244.2.2 via 192.168.1.12 ```

• Add a single large network

Container Network Interface

References Docs

• https://kubernetes.io/docs/concepts/workloads/pods/