Container Logging and Monitor

Container Logging

• Command line:
  • Single container: kubectl logs -f <pod name>
  • Multiple container: kubectl logs -f <pod name> <container name>

Framework

• e.g., Metrics server, Prometheus, Elastic Stack, Datadog, dynatrace

Metrics Server

• Heapster is deprecated and it became metrics server.
• Aggregrate data from containers and store in memory.
• To cAdvisor (container advisor): expose containers to kube API for the metrics server.
• How to use:
  • minikube: minikube addons enable metrics-server
  • git clone https://github.com/kubernetes-incubator/metrics-server
  • kubectl create -f deploy/1.8+/
  • check:
    • kubectl top node
    • kubectl top pod