Kubernetes 集群分析查看内存，CPU

Kubernetes方式 top命令查看所有pod，nodes中内存，CPU使用情况 查看pod root @ master ➜ ~ kubectl top pod -n irm-server NAME CPU(cores) MEMORY(bytes) test-ecd-server-56b77d9fbb-zfctt 1m 1529Mi test-flow-server-b477756f-2s5bc 1m 3006Mi test-huishi-api-86dcfdb7c5-jtcpt 0m 1829Mi test-huishi-message-5d4b456b88-n8xl5 241m 344Mi test-huishi-schedule-bc5f5d4d5-z22gq 3m 510Mi test-huishi-server-6f875487d7-9rzpd 44m 1483Mi test-irm-bd9444948-rwtgn 1m 1270Mi test-irm-task-89f65f5bd-zht2x 0m 1282Mi test-order-server-5fcc5575bd-67c4r 32m 1066Mi test-payment-6df4459864-5d8xl 1m 634Mi test-urule-54f4b8f84f-l5xbm 1m 2382Mi

查看具体某一个pod

root @ master ➜ ~ kubectl top pod test-huishi-server-6f875487d7-9rzpd -n irm-server NAME CPU(cores) MEMORY(bytes) test-huishi-server-6f875487d7-9rzpd 36m 1489Mi 查看nodes root @ master ➜ ~ kubectl top nodes -n irm-server NAME CPU(cores) CPU% MEMORY(bytes) MEMORY% master 225m 9% 2853Mi 25% node1 219m 3% 18990Mi 65% node11 61m 6% 4236Mi 31% node12 2344m 36% 27839Mi 101% node2 76m 7% 7950Mi 59% node4 106m 10% 8151Mi 61% node5 123m 12% 4877Mi 92% node6 129m 12% 5614Mi 42% node7 58m 5% 3738Mi 28% node8 132m 6% 9098Mi 57% node9 60m 6% 3017Mi 22%

查看具体某一个node

root @ master ➜ ~ kubectl top nodes node1 -n irm-server NAME CPU(cores) CPU% MEMORY(bytes) MEMORY% node1 222m 3% 19009Mi 65%

上面使用nodes,node都可以

进入容器pod内部查看 root @ master ➜ ~ kubectl exec test-huishi-server-6f875487d7-9rzpd -it sh -n irm-server /home # jps 1 sh: jps: not found /home # jstack 1 sh: jstack: not found /home # exit command terminated with exit code 127

docker容器内部没有jstack命令

Docker方式

找到具体pod所在的节点，进入使用docker命令查看具体的信息

docker top命令查看 [root@node1 ~]# docker ps -a |grep huishi-server 73c1189ddd0e 18.16.200.191:5000/test/huishi-server "/bin/sh -c \'java $J…" 20 hours ago Up 20 hours k8s_test-huishi-server_test-huishi-server-7f4f5c5f8c-kqzrw_irm-server_2bc27a95-216a-11ea-932e-525400506c6a_0 ed1a36493259 gcr.io/google_containers/pause-amd64:3.0 "/pause" 20 hours ago Up 20 hours k8s_POD_test-huishi-server-7f4f5c5f8c-kqzrw_irm-server_2bc27a95-216a-11ea-932e-525400506c6a_0 [root@node1 ~]# docker top 73c1189ddd0e UID PID PPID C STIME TTY TIME CMD root 3439 3416 0 Dec18 ? 00:11:41 java -XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap -XX:MaxRAMFraction=1 -Xms1024M -Duser.timezone=GMT+08 -Dfile.encoding=UTF-8 -javaagent:/data/jacocoagent.jar=includes=*,output=file,append=true,destfile=http://www.likecs.com/data/log/huishi-server/jacoco.exec -jar /home/huishi-server.jar docker stats 命令查看

docker stats 命令用来返回运行中的容器的实时数据流,

默认情况下，stats 使用参数-a或者--all，命令会每隔 1 秒钟刷新一次输出的内容直到你按下 ctrl + c。

[root@node1 ~]# docker stats -a CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS 1ad181f01c76 k8s_POD_test-capital-schedule-6468f8774f-2s6dd_common-server_78d133b9-21f7-11ea-932e-525400506c6a_0 0.00% 1.766MiB / 30.89GiB 0.01% 0B / 0B 0B / 0B 1 73c1189ddd0e k8s_test-huishi-server_test-huishi-server-7f4f5c5f8c-kqzrw_irm-server_2bc27a95-216a-11ea-932e-525400506c6a_0 0.04% 1.178GiB / 2GiB 58.88% 0B / 0B 0B / 254kB 68 ed1a36493259 k8s_POD_test-huishi-server-7f4f5c5f8c-kqzrw_irm-server_2bc27a95-216a-11ea-932e-525400506c6a_0 0.00% 1.25MiB / 30.89GiB 0.00% 0B / 0B 0B / 0B 1 05c08624b3d7 k8s_POD_test-p2p-bms-7db78b7c46-9vvnt_common-server_759c4604-1c7e-11ea-932e-525400506c6a_0 0.00% 1.543MiB / 30.89GiB 0.00% 0B / 0B 0B / 0B 1 9013e1d0a243 k8s_POD_test-institution-6569774458-t8sk9_institution-server_f35e22c0-1a2e-11ea-932e-525400506c6a_0 0.00% 1.578MiB / 30.89GiB 0.00% 0B / 0B 0B / 0B 1

输出内容：

[CONTAINER]：以短格式显示容器的 ID。
[CPU %]：CPU 的使用情况。
[MEM USAGE / LIMIT]：当前使用的内存和最大可以使用的内存。
[MEM %]：以百分比的形式显示内存使用情况。
[NET I/O]：网络 I/O 数据。
[BLOCK I/O]：磁盘 I/O 数据。
[PIDS]：PID 号。

如果不想持续的监控容器使用资源的情况，可以通过 --no-stream 选项只输出当前的状态：

[root@node1 ~]# docker stats --no-stream CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS 1ad181f01c76 k8s_POD_test-capital-schedule-6468f8774f-2s6dd_common-server_78d133b9-21f7-11ea-932e-525400506c6a_0 0.00% 1.766MiB / 30.89GiB 0.01% 0B / 0B 0B / 0B 1 73c1189ddd0e k8s_test-huishi-server_test-huishi-server-7f4f5c5f8c-kqzrw_irm-server_2bc27a95-216a-11ea-932e-525400506c6a_0 1.72% 1.178GiB / 2GiB 58.89% 0B / 0B 0B / 254kB 68 ed1a36493259 k8s_POD_test-huishi-server-7f4f5c5f8c-kqzrw_irm-server_2bc27a95-216a-11ea-932e-525400506c6a_0 0.00% 1.25MiB / 30.89GiB 0.00% 0B / 0B 0B / 0B 1 05c08624b3d7 k8s_POD_test-p2p-bms-7db78b7c46-9vvnt_common-server_759c4604-1c7e-11ea-932e-525400506c6a_0 0.00% 1.543MiB / 30.89GiB 0.00% 0B / 0B 0B / 0B 1 9013e1d0a243 k8s_POD_test-institution-6569774458-t8sk9_institution-server_f35e22c0-1a2e-11ea-932e-525400506c6a_0 0.00% 1.578MiB / 30.89GiB 0.00% 0B / 0B 0B / 0B 1 366e27c0265f k8s_debug-agent_debug-agent-h88sf_kube-system_263ac99f-133f-11ea-932e-525400506c6a_0 0.00% 10.3MiB / 30.89GiB 0.03% 0B / 0B 0B / 0B 14