lxcfs

1. 源码移植

移植版本：5.0.4
具体参考https://github.com/Loongson-Cloud-Community/lxcfs/tree/loongarch64-5.0.4 的git log信息

2. 源码构建

构建环境：loongnix server 8.4
构建命令如下：

yum install -y fuse3 fuse3-libs fuse3-devel help2man 
meson setup -Dinit-script=systemd --prefix=/usr build/
meson compile -C build/
sudo meson install -C build/

在上面的命令执行完成后会将lxcfs命令安装在/bin和/usr/bin目录下。

3. lxcfs使用

这里介绍了在docker中如何使用lxcfs。

3.1 安装

使用上面步骤2中的源码编译安装，或者下载rpm包(https://github.com/Loongson-Cloud-Community/lxcfs/releases/download/loongarch64-v5.0.4/lxcfs-5.0.4-abi1.0-rpm.tar.gz) 进行安装。

3.2 在docker中使用

（1）启动lxcfs服务：

mkdir -p /var/lib/lxcfs
sudo lxcfs /var/lib/lxcfs
# sudo lxcfs /var/lib/lxcfs &  #后台启动

（2）运行容器，下面的命令限制了容器的内存大小以及swap大小是256M，限制使用主机上的0,1两个CPU：

docker run -it -m 256m --memory-swap 256m --cpus 2 --cpuset-cpus "0,1" \
       -v /var/lib/lxcfs/proc/cpuinfo:/proc/cpuinfo:rw \
       -v /var/lib/lxcfs/proc/diskstats:/proc/diskstats:rw \
       -v /var/lib/lxcfs/proc/meminfo:/proc/meminfo:rw \
       -v /var/lib/lxcfs/proc/stat:/proc/stat:rw \
       -v /var/lib/lxcfs/proc/swaps:/proc/swaps:rw \
       -v /var/lib/lxcfs/proc/uptime:/proc/uptime:rw \
cr.loongnix.cn/library/debian:buster-slim

（3）在容器中查看运行结果，可以看到容器中的mem和swap大小就是docker命令行中设置的大小，cpu也是命令行中设置的0,1

root@e55fecbf5d0f:/# apt update && apt install -y procps
......
root@e55fecbf5d0f:/# free -h
              total        used        free      shared  buff/cache   available
Mem:          256Mi       6.0Mi       199Mi          0B        50Mi       249Mi
Swap:         256Mi          0B       256Mi
root@e55fecbf5d0f:/# cat /proc/cpuinfo 
processor   : 0
package         : 0
core            : 0
cpu family      : Loongson-64bit
model name      : Loongson-3A5000-HV
CPU Revision        : 0x11
FPU Revision        : 0x00
CPU MHz         : 2500.00
BogoMIPS        : 5000.00
TLB entries     : 2112
Address sizes       : 48 bits physical, 48 bits virtual
isa         : loongarch32 loongarch64
features        : cpucfg lam ual fpu lsx lasx complex crypto lvz lbt_x86 lbt_arm lbt_mips
hardware watchpoint : yes, iwatch count: 8, dwatch count: 8

processor   : 1
package         : 0
core            : 1
cpu family      : Loongson-64bit
model name      : Loongson-3A5000-HV
CPU Revision        : 0x11
FPU Revision        : 0x00
CPU MHz         : 2500.00
BogoMIPS        : 5000.00
TLB entries     : 2112
Address sizes       : 48 bits physical, 48 bits virtual
isa         : loongarch32 loongarch64
features        : cpucfg lam ual fpu lsx lasx complex crypto lvz lbt_x86 lbt_arm lbt_mips
hardware watchpoint : yes, iwatch count: 8, dwatch count: 8

4. 备注

在未启动lxcfs服务时，查看容器中的内存和CPU信息。

（1）容器启动：

（2）在容器中查看内存和CPU信息，可以发现在容器中查看到内存和CPU信息并不是容器真实的

...... root@2b8fe77f1098:/#  Mem: Swap: root@2b8fe77f1098:/# system type processor package core cpu family model name CPU Revision FPU Revision CPU MHz BogoMIPS TLB entries Address sizes isa features hardware  processor package core cpu family model name CPU Revision FPU Revision CPU MHz BogoMIPS TLB entries Address sizes isa features hardware  processor package core cpu family model name CPU Revision FPU Revision CPU MHz BogoMIPS TLB entries Address sizes isa features hardware  processor package core cpu family model name CPU Revision FPU Revision CPU MHz BogoMIPS TLB entries Address sizes isa features hardware

href="#__codelineno-4-1">docker run -it -m 256m --memory-swap 256m --cpus 2 --cpuset-cpus "0,1" cr.loongnix.cn/library/debian:buster-slim 信息，而是宿主机上的信息： href="#__codelineno-5-1">root@2b8fe77f1098:/# apt update && apt install -y procps free -h total used free shared buff/cache available 15Gi 1.3Gi 3.1Gi 64Mi 10Gi 11Gi 7.9Gi 130Mi 7.8Gi cat /proc/cpuinfo : generic-loongson-machine : 0 : 0 : 0 : Loongson-64bit : Loongson-3A5000-HV : 0x11 : 0x00 : 2500.00 : 5000.00 : 2112 : 48 bits physical, 48 bits virtual : loongarch32 loongarch64 : cpucfg lam ual fpu lsx lasx complex crypto lvz lbt_x86 lbt_arm lbt_mips watchpoint : yes, iwatch count: 8, dwatch count: 8 : 1 : 0 : 1 : Loongson-64bit : Loongson-3A5000-HV : 0x11 : 0x00 : 2500.00 : 5000.00 : 2112 : 48 bits physical, 48 bits virtual : loongarch32 loongarch64 : cpucfg lam ual fpu lsx lasx complex crypto lvz lbt_x86 lbt_arm lbt_mips watchpoint : yes, iwatch count: 8, dwatch count: 8 : 2 : 0 : 2 : Loongson-64bit : Loongson-3A5000-HV : 0x11 : 0x00 : 2500.00 : 5000.00 : 2112 : 48 bits physical, 48 bits virtual : loongarch32 loongarch64 : cpucfg lam ual fpu lsx lasx complex crypto lvz lbt_x86 lbt_arm lbt_mips watchpoint : yes, iwatch count: 8, dwatch count: 8 : 3 : 0 : 3 : Loongson-64bit : Loongson-3A5000-HV : 0x11 : 0x00 : 2500.00 : 5000.00 : 2112 : 48 bits physical, 48 bits virtual : loongarch32 loongarch64 : cpucfg lam ual fpu lsx lasx complex crypto lvz lbt_x86 lbt_arm lbt_mips watchpoint : yes, iwatch count: 8, dwatch count: 8