1、下载一个stress压力工具的镜像
[root@docker ~]# docker pull joedval/stress Pulling repository joedval/stress 7eb627cb08a2: Download complete b0082ba983ef: Download complete 109b72e23ca5: Download complete a1a076997d57: Download complete Status: Downloaded newer image for joedval/stress:latest
2、随机生成一个以“joedval/stress”镜像为基础的容器，设定权级为512
[root@docker ~]# docker run -it --rm -c 512 joedval/stress --cpu 1 stress: info: [1] dispatching hogs: 1 cpu, 0 io, 0 vm, 0 hdd 可以看到cpu占用为99.6%，接近100% [root@docker ~]# top top - 15:19:07 up 1:04, 3 users, load average: 1.62, 1.03, 0.43 Tasks: 158 total, 2 running, 156 sleeping, 0 stopped, 0 zombie Cpu(s): 99.3%us, 0.3%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.3%hi, 0.0%si, 0.0%st Mem: 3910160k total, 1289624k used, 2620536k free, 96856k buffers Swap: 4194300k total, 0k used, 4194300k free, 914440k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 4144 root 20 0 7208 120 28 R 99.6 0.0 2:58.09 stress 4403 root 20 0 15032 1252 924 R 0.3 0.0 0:00.32 top 1 root 20 0 19356 1532 1228 S 0.0 0.0 0:01.55 init 2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd 3 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0 4 root 20 0 0 0 0 S 0.0 0.0 0:00.03 ksoftirqd/0 5 root RT 0 0 0 0 S 0.0 0.0 0:00.00 stopper/0 6 root RT 0 0 0 0 S 0.0 0.0 0:00.02 watchdog/0 7 root 20 0 0 0 0 S 0.0 0.0 0:01.62 events/0 8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 events/0 9 root 20 0 0 0 0 S 0.0 0.0 0:00.00 events_long/0 10 root 20 0 0 0 0 S 0.0 0.0 0:00.00 events_power_ef 11 root 20 0 0 0 0 S 0.0 0.0 0:00.00 cgroup 12 root 20 0 0 0 0 S 0.0 0.0 0:00.00 khelper 13 root 20 0 0 0 0 S 0.0 0.0 0:00.03 netns 14 root 20 0 0 0 0 S 0.0 0.0 0:00.00 async/mgr 15 root 20 0 0 0 0 S 0.0 0.0 0:00.00 pm 16 root 20 0 0 0 0 S 0.0 0.0 0:00.02 sync_supers 17 root 20 0 0 0 0 S 0.0 0.0 0:00.01 bdi-default
3、继续生成一个容器
root@docker ~]# docker run -it --rm -c 512 joedval/stress --cpu 1 stress: info: [1] dispatching hogs: 1 cpu, 0 io, 0 vm, 0 hdd [root@docker ~]# top top - 15:20:48 up 1:05, 3 users, load average: 1.55, 1.13, 0.52 Tasks: 164 total, 3 running, 161 sleeping, 0 stopped, 0 zombie Cpu(s): 99.0%us, 0.7%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.3%hi, 0.0%si, 0.0%st Mem: 3910160k total, 1298324k used, 2611836k free, 97924k buffers Swap: 4194300k total, 0k used, 4194300k free, 917480k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 4772 root 20 0 7208 124 28 R 49.9 0.0 0:16.12 stress 4144 root 20 0 7208 120 28 R 49.5 0.0 4:22.39 stress 1 root 20 0 19356 1532 1228 S 0.0 0.0 0:01.55 init 2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd 3 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0 4 root 20 0 0 0 0 S 0.0 0.0 0:00.03 ksoftirqd/0 5 root RT 0 0 0 0 S 0.0 0.0 0:00.00 stopper/0 6 root RT 0 0 0 0 S 0.0 0.0 0:00.02 watchdog/0 7 root 20 0 0 0 0 S 0.0 0.0 0:01.66 events/0 8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 events/0 9 root 20 0 0 0 0 S 0.0 0.0 0:00.00 events_long/0 10 root 20 0 0 0 0 S 0.0 0.0 0:00.00 events_power_ef 11 root 20 0 0 0 0 S 0.0 0.0 0:00.00 cgroup 12 root 20 0 0 0 0 S 0.0 0.0 0:00.00 khelper 13 root 20 0 0 0 0 S 0.0 0.0 0:00.03 netns 14 root 20 0 0 0 0 S 0.0 0.0 0:00.00 async/mgr 15 root 20 0 0 0 0 S 0.0 0.0 0:00.00 pm 16 root 20 0 0 0 0 S 0.0 0.0 0:00.02 sync_supers 17 root 20 0 0 0 0 S 0.0 0.0 0:00.01 bdi-default 然后，可以发现存在两个stress的进程，各占用49.5% 我们再次添加一个容器，并修改下stress权限为1024 [root@docker ~]# top top - 15:22:13 up 1:07, 4 users, load average: 2.53, 1.50, 0.70 Tasks: 171 total, 4 running, 167 sleeping, 0 stopped, 0 zombie Cpu(s): 99.3%us, 0.3%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.3%hi, 0.0%si, 0.0%st Mem: 3910160k total, 1318152k used, 2592008k free, 99008k buffers Swap: 4194300k total, 0k used, 4194300k free, 921024k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 4992 root 20 0 7208 120 28 R 49.5 0.0 0:09.79 stress 4144 root 20 0 7208 120 28 R 24.9 0.0 4:59.56 stress 4772 root 20 0 7208 124 28 R 24.6 0.0 0:53.28 stress 1 root 20 0 19356 1532 1228 S 0.0 0.0 0:01.55 init 2 root 20 0 0 0 0 S 0.0 0.0 0:00.01 kthreadd 3 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0 4 root 20 0 0 0 0 S 0.0 0.0 0:00.03 ksoftirqd/0 5 root RT 0 0 0 0 S 0.0 0.0 0:00.00 stopper/0 6 root RT 0 0 0 0 S 0.0 0.0 0:00.02 watchdog/0 7 root 20 0 0 0 0 S 0.0 0.0 0:01.69 events/0 8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 events/0 9 root 20 0 0 0 0 S 0.0 0.0 0:00.00 events_long/0 10 root 20 0 0 0 0 S 0.0 0.0 0:00.00 events_power_ef 11 root 20 0 0 0 0 S 0.0 0.0 0:00.00 cgroup 12 root 20 0 0 0 0 S 0.0 0.0 0:00.00 khelper 13 root 20 0 0 0 0 S 0.0 0.0 0:00.03 netns 14 root 20 0 0 0 0 S 0.0 0.0 0:00.00 async/mgr 15 root 20 0 0 0 0 S 0.0 0.0 0:00.00 pm 16 root 20 0 0 0 0 S 0.0 0.0 0:00.02 sync_supers
4、查看容器信息：
[root@docker ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES fcc6cb7b064c joedval/stress "stress --cpu 1" 29 seconds ago Up 28 seconds drunk_rosalind 7c195fe2e038 joedval/stress "stress --cpu 1" 2 minutes ago Up 2 minutes loving_galileo 9b19fbca489b joedval/stress "stress --cpu 1" 7 minutes ago Up 7 minutes furious_rosalind
5、测试内存：
[root@docker ~]# docker run -it --rm -m 128m joedval/stress --vm 1 --vm-bytes 120m --vm-hang 0 stress: info: [1] dispatching hogs: 0 cpu, 0 io, 1 vm, 0 hdd [root@docker ~]# docker ps -l CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 9841ee711d7f joedval/stress "stress --vm 1 --vm- 8 seconds ago Up 6 seconds boring_jones [root@docker ~]# docker run -it --rm -m 128m joedval/stress --vm 1 --vm-bytes 512m --vm-hang 0 stress: info: [1] dispatching hogs: 0 cpu, 0 io, 1 vm, 0 hdd stress: FAIL: [1] (415) <-- worker 5 got signal 9 stress: WARN: [1] (417) now reaping child worker processes stress: FAIL: [1] (421) kill error: No such process stress: FAIL: [1] (451) failed run completed in 3s [root@docker ~]# docker run -it --rm -m 128m joedval/stress --vm 1 --vm-bytes 255m --vm-hang 0 stress: info: [1] dispatching hogs: 0 cpu, 0 io, 1 vm, 0 hdd [root@docker ~]# docker run -it --rm -m 128m joedval/stress --vm 1 --vm-bytes 256m --vm-hang 0 stress: info: [1] dispatching hogs: 0 cpu, 0 io, 1 vm, 0 hdd stress: FAIL: [1] (415) <-- worker 6 got signal 9 stress: WARN: [1] (417) now reaping child worker processes stress: FAIL: [1] (421) kill error: No such process stress: FAIL: [1] (451) failed run completed in 2s 说明：不能超过预设值的两倍(比如上面案例中256m是128m，所以自动退出了）
原文：http://www.bubuko.com/infodetail-1476963.html