一、kubectl describe node
可通过该命令查看 Pod 在节点上的资源分配情况（Request、Limits），如下：
# product 表示生产环境
kubectl describe node -l env=product
# 执行结果
Namespace Name CPU Requests CPU Limits Memory Requests Memory Limits AGE
--------- ---- ------------ ---------- --------------- ------------- ---
product annoroad-clinicallims3-754dddb5cb-k5xkn 0 (0%) 0 (0%) 0 (0%) 0 (0%) 85d
product annoroad-crm-796884585d-ts2xn 0 (0%) 0 (0%) 0 (0%) 0 (0%) 85d
product annoroad-dms-6d658d564f-m6j7r 0 (0%) 0 (0%) 0 (0%) 0 (0%) 16d
product annoroad-dms-server-6557c5bc85-45sw2 0 (0%) 0 (0%) 0 (0%) 0 (0%) 15d
二、kubectl top node
可通过该命令查看节点的资源使用情况，如下：
# product 表示生产环境
kubectl top node -l env=product
# 执行结果
NAME CPU(cores) CPU% MEMORY(bytes) MEMORY%
cn-beijing.192.16.168.102 904m 11% 10340Mi 69%
cn-beijing.192.16.168.103 1393m 17% 12810Mi 86%
cn-beijing.192.16.168.104 1994m 24% 13281Mi 89%
cn-beijing.192.16.168.105 987m 12% 9399Mi 63%
cn-beijing.192.16.168.115 638m 15% 12017Mi 80%
cn-beijing.192.16.168.118 806m 20% 9372Mi 62%
cn-beijing.192.16.168.135 258m 6% 9696Mi 65%
cn-beijing.192.16.168.136 871m 21% 10957Mi 73%
cn-beijing.192.16.168.137 310m 7% 9322Mi 62%
cn-beijing.192.16.168.138 943m 23% 11908Mi 80%
三、kubectl top pod
可通过该命令查看 Pod 资源使用情况，如下：
# product 表示生产环境
kubectl top pod -n product
# 执行结果
NAME CPU(cores) MEMORY(bytes)
annoroad-alpha-5dbd868d-lsvj5 2m 383Mi
annoroad-applet-6f977779bc-2bgpn 3m 384Mi
annoroad-applet-6f977779bc-mgdhw 3m 387Mi
annoroad-applet-6f977779bc-qhqbg 2m 393Mi
annoroad-beta-7c4d7c654f-m4rkf 2m 334Mi
annoroad-clinicallims-67855bf4f5-9ddwd 4m 502Mi
annoroad-clinicallims-67855bf4f5-rdq2s 3m 488Mi
annoroad-clinicallims-67855bf4f5-vvrsn 3m 436Mi
annoroad-clinicallims-67855bf4f5-zhbvk 4m 509Mi
annoroad-clinicallims-67855bf4f5-zs65j 3m 420Mi
annoroad-clinicallims3-56d9c87786-2ftzq 3m 596Mi
四、kubectl get pod -o wide |grep $node
可通过该命令查看指定 node 上运行的所有 pod，如下：
# product 表示生产环境
kubectl get pod -n product -o wide |grep cn-beijing.172.15.14.128
# 执行结果
annoroad-clinical-lims-8556cc6b76-57ctq 1/1 Running 6 20h 170.22.11.23 cn-beijing.172.15.14.128 <none> <none>
annoroad-covid19-front-fdd7469ff-pg2hm 1/1 Running 0 29d 170.22.11.20 cn-beijing.172.15.14.128 <none> <none>
annoroad-crm-7b9cd5c6c9-hj5s8 1/1 Running 0 10d 170.22.11.12 cn-beijing.172.15.14.128 <none> <none>
annoroad-crm-server-696d4f5867-77bdd 1/1 Running 2 29d 170.22.11.122 cn-beijing.172.15.14.128 <none> <none>
annoroad-gateway-55785fd8c-xlx4q 1/1 Running 0 88d 170.22.11.99 cn-beijing.172.15.14.128 <none> <none>
五、kubectl top pod |grep -E “$podname1|$podname2|…”
可通过该命令查看一个 pod 或几个 pod 的资源使用情况 ，如下：
# product 表示生产环境
kubectl top pod -n product |grep -E "annoroad-clinical-lims-8556cc6b76-57ctq|annoroad-covid19-front-fdd7469ff-pg2hm"
# 执行结果
annoroad-clinical-lims-8556cc6b76-57ctq 74m 1216Mi
annoroad-covid19-front-fdd7469ff-pg2hm 1m 2Mi
