Docker下使用stress进行压力测试
1、下载一个stress压力工具的镜像# 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
# docker run -it --rm -c 512 joedval/stress --cpu 1
stress: info: dispatching hogs: 1 cpu, 0 io, 0 vm, 0 hdd
可以看到cpu占用为99.6%，接近100%
# top
top - 15:19:07 up1:04,3 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 PRNIVIRTRESSHR S %CPU %MEM TIME+COMMAND
4144 root 20 07208120 28 R 99.60.0 2:58.09 stress
4403 root 20 0 15032 1252924 R0.30.0 0:00.32 top
1 root 20 0 19356 1532 1228 S0.00.0 0:01.55 init
2 root 20 0 0 0 0 S0.00.0 0:00.00 kthreadd
3 root RT 0 0 0 0 S0.00.0 0:00.00 migration/0
4 root 20 0 0 0 0 S0.00.0 0:00.03 ksoftirqd/0
5 root RT 0 0 0 0 S0.00.0 0:00.00 stopper/0
6 root RT 0 0 0 0 S0.00.0 0:00.02 watchdog/0
7 root 20 0 0 0 0 S0.00.0 0:01.62 events/0
8 root 20 0 0 0 0 S0.00.0 0:00.00 events/0
9 root 20 0 0 0 0 S0.00.0 0:00.00 events_long/0
10 root 20 0 0 0 0 S0.00.0 0:00.00 events_power_ef
11 root 20 0 0 0 0 S0.00.0 0:00.00 cgroup
12 root 20 0 0 0 0 S0.00.0 0:00.00 khelper
13 root 20 0 0 0 0 S0.00.0 0:00.03 netns
14 root 20 0 0 0 0 S0.00.0 0:00.00 async/mgr
15 root 20 0 0 0 0 S0.00.0 0:00.00 pm
16 root 20 0 0 0 0 S0.00.0 0:00.02 sync_supers
17 root 20 0 0 0 0 S0.00.0 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: dispatching hogs: 1 cpu, 0 io, 0 vm, 0 hdd
# top
top - 15:20:48 up1:05,3 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 PRNIVIRTRESSHR S %CPU %MEM TIME+COMMAND
4772 root 20 07208124 28 R 49.90.0 0:16.12 stress
4144 root 20 07208120 28 R 49.50.0 4:22.39 stress
1 root 20 0 19356 1532 1228 S0.00.0 0:01.55 init
2 root 20 0 0 0 0 S0.00.0 0:00.00 kthreadd
3 root RT 0 0 0 0 S0.00.0 0:00.00 migration/0
4 root 20 0 0 0 0 S0.00.0 0:00.03 ksoftirqd/0
5 root RT 0 0 0 0 S0.00.0 0:00.00 stopper/0
6 root RT 0 0 0 0 S0.00.0 0:00.02 watchdog/0
7 root 20 0 0 0 0 S0.00.0 0:01.66 events/0
8 root 20 0 0 0 0 S0.00.0 0:00.00 events/0
9 root 20 0 0 0 0 S0.00.0 0:00.00 events_long/0
10 root 20 0 0 0 0 S0.00.0 0:00.00 events_power_ef
11 root 20 0 0 0 0 S0.00.0 0:00.00 cgroup
12 root 20 0 0 0 0 S0.00.0 0:00.00 khelper
13 root 20 0 0 0 0 S0.00.0 0:00.03 netns
14 root 20 0 0 0 0 S0.00.0 0:00.00 async/mgr
15 root 20 0 0 0 0 S0.00.0 0:00.00 pm
16 root 20 0 0 0 0 S0.00.0 0:00.02 sync_supers
17 root 20 0 0 0 0 S0.00.0 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
# top
top - 15:22:13 up1:07,4 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 PRNIVIRTRESSHR S %CPU %MEM TIME+COMMAND
4992 root 20 07208120 28 R 49.50.0 0:09.79 stress
4144 root 20 07208120 28 R 24.90.0 4:59.56 stress
4772 root 20 07208124 28 R 24.60.0 0:53.28 stress
1 root 20 0 19356 1532 1228 S0.00.0 0:01.55 init
2 root 20 0 0 0 0 S0.00.0 0:00.01 kthreadd
3 root RT 0 0 0 0 S0.00.0 0:00.00 migration/0
4 root 20 0 0 0 0 S0.00.0 0:00.03 ksoftirqd/0
5 root RT 0 0 0 0 S0.00.0 0:00.00 stopper/0
6 root RT 0 0 0 0 S0.00.0 0:00.02 watchdog/0
7 root 20 0 0 0 0 S0.00.0 0:01.69 events/0
8 root 20 0 0 0 0 S0.00.0 0:00.00 events/0
9 root 20 0 0 0 0 S0.00.0 0:00.00 events_long/0
10 root 20 0 0 0 0 S0.00.0 0:00.00 events_power_ef
11 root 20 0 0 0 0 S0.00.0 0:00.00 cgroup
12 root 20 0 0 0 0 S0.00.0 0:00.00 khelper
13 root 20 0 0 0 0 S0.00.0 0:00.03 netns
14 root 20 0 0 0 0 S0.00.0 0:00.00 async/mgr
15 root 20 0 0 0 0 S0.00.0 0:00.00 pm
16 root 20 0 0 0 0 S0.00.0 0:00.02 sync_supers 4、查看容器信息：
# 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：
# docker run -it --rm -m 128m joedval/stress --vm 1 --vm-bytes 120m --vm-hang 0
stress: info: dispatching hogs: 0 cpu, 0 io, 1 vm, 0 hdd
# 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
# docker run -it --rm -m 128m joedval/stress --vm 1 --vm-bytes 512m --vm-hang 0
stress: info: dispatching hogs: 0 cpu, 0 io, 1 vm, 0 hdd
stress: FAIL: (415) <-- worker 5 got signal 9
stress: WARN: (417) now reaping child worker processes
stress: FAIL: (421) kill error: No such process
stress: FAIL: (451) failed run completed in 3s
# docker run -it --rm -m 128m joedval/stress --vm 1 --vm-bytes 255m --vm-hang 0
stress: info: dispatching hogs: 0 cpu, 0 io, 1 vm, 0 hdd
# docker run -it --rm -m 128m joedval/stress --vm 1 --vm-bytes 256m --vm-hang 0
stress: info: dispatching hogs: 0 cpu, 0 io, 1 vm, 0 hdd
stress: FAIL: (415) <-- worker 6 got signal 9
stress: WARN: (417) now reaping child worker processes
stress: FAIL: (421) kill error: No such process
stress: FAIL: (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）
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