k8s Liveness vs Readiness

Liveness: The kubelet uses liveness probes to know when to restart a Container. 
Readiness: The kubelet uses readiness probes to know when a Container is ready to start accepting traffic.

https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-probes/

Share directory over HTTP with Python

cd the directory you want to share, and

# For Python >=2.4
python -m SimpleHTTPServer 8888
# For Python 3.x
python3 -m http.server 8888

Then you can access this http server with: http://your_host_ip:8888

PlantUML example

@startuml
hide footbox
title HANA CDN Service
database HANA
== Initialization ==
CDN -> Kafka: get Last PFCDIK of today
CDN <- Kafka: Last PFCDIK of today
note over CDN: set Last PFCDIK as 0 if no PFCDIK was found for today

|||

== Poll/Publish delta changes ==
loop every 1 minute
    CDN -> HANA: changes since Last PFCDIK of today
    CDN <- HANA: delta changes
    CDN -> Kafka: publish delta changes to topic
    CDN -> CDN: update local Last PFCDIK of today
end