[10] Node 정보 수집

❓Check Ready Nodes

• Check to see how many nodes are ready (not including nodes tainted NoSchedule) and write the number to /var/CKA2022/RN0001
  • not including nodes tainted NoSchedule —> tainted에 NoSchedule 적혀있는건 제외

실습

# ready 단어와 일치하는 것만 결과 출력
[user@console ~]$ kubectl get nodes | grep -i -w ready
hk8s-m    Ready
hk8s-w1   Ready

[user@console ~]$ kubectl describe node hk8s-m | grep -i NoSchedule

[user@console ~]$ kubectl describe node hk8s-w1 | grep -i NoSchedule

hk8s-m 노드에는 NoSchedule 정보가 포함되어 있음

# 결과값 파일에 저장
[user@console ~]$ echo "1" > /var/CKA2022/RN0001

[user@console ~]$ cat /var/CKA2022/RN0001
1

❓Count the number of nodes that are ready to run normal workloads

• Determine how many nodes in the cluster are ready to run normal workloads (i.e workloads that do not have any special tolerations)
• Output this number to the file /var/CKA2022/NODE-Count

실습

# ready 상태인 노드 출력
[user@console ~]$ kubectl get nodes | grep -i -w ready

[user@console ~]$ kubectl get nodes | grep -i -w ready | wc -l
2

[user@console ~]$ kubectl get nodes | grep -i -w ready | wc -l > /var/CKA2022/NODE-Count

[user@console ~]$ cat /var/CKA2022/NODE-Count
2