bocker中创建容器涉及的技术

来源：互联网发布：js vr 插件互动编辑：程序博客网时间：2024/06/05 22:49

循环设备 /dev/loopx
/dev/loop（或称vnd (vnode disk)、lofi（循环文件接口））是一种伪设备，这种设备使得文件可以如同块设备一般被访问。

fallocate  -l 10G  ~/test.imgmkfs.btrfs ~/test.imgmount -o loop ~/test.img  /mnt/test

df结果

[root@localhost /]# df -hFilesystem                       Size  Used Avail Use% Mounted on/dev/mapper/VolGroup00-LogVol00   37G   24G   12G  66% /devtmpfs                         900M     0  900M   0% /devtmpfs                            911M     0  911M   0% /dev/shmtmpfs                            911M   17M  894M   2% /runtmpfs                            911M     0  911M   0% /sys/fs/cgroup/dev/sda2                        477M  119M  329M  27% /boottmpfs                            183M     0  183M   0% /run/user/0/dev/loop0                        10G   17M  8.0G   1% /test/dev/loop1                        10G  1.1G  7.1G  14% /var/bocker[root@localhost /]#

btrfs

[root@localhost dev]# sh -x /usr/bin/bocker run img_42133  l+ set -o errexit -o nounset -o pipefail+ shopt -s nullglob+ btrfs_path=/var/bocker+ cgroups=cpu,cpuacct,memory+ [[ 3 -gt 0 ]]+ '[' ru == -- ']'+ [[ -z run ]]+ case $1 in+ bocker_run img_42133 l++ shuf -i 42002-42254 -n 1+ uuid=ps_42156++ bocker_check img_42133++ grep -qw img_42133++ btrfs subvolume list /var/bocker++ echo 0+ [[ 0 == 1 ]]++ bocker_check ps_42156++ grep -qw ps_42156++ btrfs subvolume list /var/bocker++ echo 1+ [[ 1 == 0 ]]+ cmd=l++ echo 156++ sed s/0//g+ ip=156+ mac=1:56+ ip link add dev veth0_ps_42156 type veth peer name veth1_ps_42156+ ip link set dev veth0_ps_42156 up+ ip link set veth0_ps_42156 master bridge0+ ip netns add netns_ps_42156+ ip link set veth1_ps_42156 netns netns_ps_42156+ ip netns exec netns_ps_42156 ip link set dev lo up+ ip netns exec netns_ps_42156 ip link set veth1_ps_42156 address 02:42:ac:11:001:56+ ip netns exec netns_ps_42156 ip addr add 10.0.0.156/24 dev veth1_ps_42156+ ip netns exec netns_ps_42156 ip link set dev veth1_ps_42156 up+ ip netns exec netns_ps_42156 ip route add default via 10.0.0.1+ btrfs subvolume snapshot /var/bocker/img_42133 /var/bocker/ps_42156+ echo 'nameserver 8.8.8.8'+ echo l+ cgcreate -g cpu,cpuacct,memory:/ps_42156+ : 512+ cgset -r cpu.shares=512 ps_42156+ : 512+ cgset -r memory.limit_in_bytes=512000000 ps_42156+ tee /var/bocker/ps_42156/ps_42156.log+ cgexec -g cpu,cpuacct,memory:ps_42156 ip netns exec netns_ps_42156 unshare -fmuip --mount-proc chroot /var/bocker/ps_42156 /bin/sh -c '/bin/mount -t proc proc /proc && l'/bin/sh: l: command not found+ true+ ip link del dev veth0_ps_42156+ ip netns del netns_ps_42156

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