docker资源限制
DOCKER 1.8.2
CPU的资源限制：
-c CPU权重
只有争用时权重才有意义
例如，启动两个容器，使用同一个cpu权重分别为1024和512
docker run -ti --rm -c 1024 --cpuset-cpus=0 centos docker run -ti --rm -c 512 --cpuset-cpus=0 centos
分别执行：while true;do i=1;done 消耗CPU资源
[root@centos-1 ~]# top top - 00:21:43 up 51 min, 3 users, load average: 1.14, 0.67, 0.55 Tasks: 203 total, 4 running, 199 sleeping, 0 stopped, 0 zombie %Cpu0 :100.0 us, 0.0 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu1 : 0.0 us, 0.3 sy, 0.0 ni, 99.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu2 : 0.0 us, 0.3 sy, 0.0 ni, 99.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu3 : 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st KiB Mem : 1013272 total, 661444 free, 133464 used, 218364 buff/cache KiB Swap: 2097148 total, 2097148 free, 0 used. 719192 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 3517 root 20 0 11772 1748 1404 R 66.8 0.2 0:22.34 bash 3584 root 20 0 11772 1748 1404 R 33.2 0.2 0:30.42 bash
结果如同权重设置一致：最大CPU消耗为1024:512=2:1
--cpuset-cpus= CPUs in which to allow execution (0-3, 0,1)
#创建如下容器，仅使用0，1CPU资源：
docker run -ti --rm --cpuset-cpus=0,1 centos
耗尽资源：
[root@d7cf41bd1340 /]# ps -ef | grep test root 16 1 96 16:29 ? 00:01:18 sh test.sh root 17 1 54 16:29 ? 00:00:32 sh test.sh root 18 1 48 16:29 ? 00:00:24 sh test.sh root 23 1 34 16:30 ? 00:00:01 sh test.sh root 24 1 32 16:30 ? 00:00:01 sh test.sh root 25 1 37 16:30 ? 00:00:01 sh test.sh
top - 00:31:47 up 1:01, 3 users, load average: 4.97, 2.73, 1.55 Tasks: 208 total, 7 running, 201 sleeping, 0 stopped, 0 zombie %Cpu0 :100.0 us, 0.0 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu1 :100.0 us, 0.0 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu2 : 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu3 : 0.0 us, 0.3 sy, 0.0 ni, 99.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st KiB Mem : 1013272 total, 651904 free, 138928 used, 222440 buff/cache KiB Swap: 2097148 total, 2097148 free, 0 used. 713716 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 3696 root 20 0 11632 1124 940 R 33.6 0.1 0:55.70 sh 3697 root 20 0 11632 1120 940 R 33.6 0.1 0:48.37 sh 3703 root 20 0 11632 1124 940 R 33.6 0.1 0:25.18 sh 3694 root 20 0 11632 1120 940 R 33.2 0.1 1:41.80 sh 3704 root 20 0 11632 1120 940 R 33.2 0.1 0:24.74 sh 3705 root 20 0 11632 1124 940 R 33.2 0.1 0:24.55 sh
限制内存：
-m 内存限制
--memory-swap= Total memory (memory + swap), '-1' to disable swap 限制swap
#内存128m，swap 128m
docker run -ti --rm -m 128m --memory-swap=256m centos
由于懒，没测试
