[Kubernetes] Inspecting Kubernetes Object

---

Inspecting Kubernetes Object

• get
• describe
• logs
• Watching recreation of Pods

---

get

# get common information
kubectl get all

kubectl get all -o wide
kubectl get all -o yaml

# get all nodes
kubectl get nodes

# get all namespaces
kubectl get namespaces

# get pods
kubectl get pods
# keep watching
kubectl get pods -w

# get particular information of a node 
kubectl get node docker-desktop -o wide

# get events
kubectl get events
# get events continually after the command
kubectl get events --watch-only 
 

---

describe

# all pods
kubectl describe pods

# describe specific pod(kubectl describe pod {pod_name})
kubectl describe pod my-apache-6f45bc5bd9-hd2lv

# describe node(kubectl describe node/{node_name})
kubectl describe node/docker-desktop

# describe specific pods(kubectl describe pods {pod_name})
kubectl describe pods my-apache-6f45bc5bd9-4vvw9

# describe deployments(kubectl describe deploy {deployment_name})
kubectl describe deploy my-apache

---

logs

• May need third-party to get centeralized logging system
• 🔗 참고
  • utility to to find logs easily without a centralized, searchable logging sollution
  • collect logs from multiple containers, colors differently by containers, etc.

# get running pods
kubectl get pods

# get container logs(kubectl logs deploy/{de}})
# picks a random replica and the first container 
kubectl logs deploy/my-apache

# specifiy container in pod and follow 
kubectl logs pod/my-apache-6f45bc5bd9-hd2lv -c httpd -f --tail 1

# get all logs inside a pod
kubectl logs pod/my-apache-6f45bc5bd9-hd2lv --all-containers

# get logs only matching specific label
# label information can be retrieved using 'kubectl describe deploy my-apache'
kubectl logs -l app=my-apache

---

Watching recreation of Pods

# watch pods in runtime
kubectl get pods -w

# delete pods(kubectl delete pod {pod_name})
kubectl delete pod my-apache-6f45bc5bd9-4vvw9

# don't forget to delete the remaining deployment for experiment
# kubectl delete deployment my-apache

---