docker资源限额

多数的应⽤场景要对Docker容器的运⾏内存进⾏限制，防⽌其使⽤过多的内存。

格式：-m或--memory

正常的内存大小

[root@admin ~]# docker ps -a
CONTAINER ID   IMAGE             COMMAND                   CREATED      STATUS         PORTS                                       NAMES
bd9b6b85169d   registry:latest   "/entrypoint.sh /etc…"   2 days ago   Up 5 minutes   0.0.0.0:5000->5000/tcp, :::5000->5000/tcp   registry
[root@admin ~]# 
[root@admin ~]# docker inspect registry | grep "Memory"
            "Memory": 0,
            "MemoryReservation": 0,
            "MemorySwap": 0,
            "MemorySwappiness": null,

指定内存大小

[root@admin ~]# docker run  -id --name abcd -m 128M registry 
49939194977c03d58e38be1fcb0cbefd8df1d614331b34e70c741bb0e47a3cc2
[root@admin ~]# docker inspect abcd | grep "Memory"
            "Memory": 134217728,
            "MemoryReservation": 0,
            "MemorySwap": 268435456,
            "MemorySwappiness": null,
[root@admin ~]# 

⼤多数的应⽤场景要对Docker容器的CPU利⽤率进⾏限制，防⽌其使⽤过多的CPU。 在Docker容器运⾏时，我们可以使⽤参数–cpuset来绑定CPU，使得该Docker容器只在固 定的CPU上运⾏。

格式：--cpuset-cpus

原始cpu

[root@admin ~]# docker inspect  registry | grep "CpusetCpus"
            "CpusetCpus": "",
[root@admin ~]# 

[root@admin ~]# docker run -id --name xcpu --cpuset-cpus 1 registry
3b1eca3ed5d561014241887208cee3c507aac658cefcd41f23f44ab08c6c9286
[root@admin ~]# docker inspect xcpu  | grep Cpu
            "CpuShares": 0,
            "NanoCpus": 0,
            "CpuPeriod": 0,
            "CpuQuota": 0,
            "CpuRealtimePeriod": 0,
            "CpuRealtimeRuntime": 0,
            "CpusetCpus": "1",   //核心数
            "CpusetMems": "",
            "CpuCount": 0,
            "CpuPercent": 0,