README.md

Episode 57: Life of a Packet: Services Continued

YouTube

Headlines

• eBPF Summit Registration is open!

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• Cilium developers are committed!

• KubeCon NA schedule is online

• eBPF news episode 12

Life of a packet

Understanding how Cilium does what it does.

Docs

Scenarios: Episode 51

• - pod 2 pod same node
• - pod 2 pod on adjacent node
• - pod 2 proxy 2 pod on adjacent node

Scenarios: Episode 53

• kube-proxy

Scenarios: Episode 57

• Kube proxy replacement

Tools

cilium monitor hubble observe hubble relay

pernode.sh

#!/bin/bash

# The purpose of this script is to deploy to each node in the cluster 2 pods. 
# Each pod will have an env var that shows it's zone.

function netpod () {
  kubectl run net${2}-${1} \
     --image overridden  --labels app=net,pod=net${2}-${1},node=${1}  --overrides \
    '{
      "spec":{
        "hostname": "net'${2}-${1}'",
       "subdomain": "net",
        "nodeName": "'$1'",
        "containers":[{
          "name":"net",
          "image":"mauilion/debug"
        }]
      }
    }'
}

for worker in $(kubectl get nodes -o name | sed s/node.//)
  do
    for i in {1..2}
      do netpod $worker $i
    done
  done

kubectl create service clusterip net --tcp 8080 

Observation Points

• to-endpoint
• to-overlay
• to-proxy