解決容器無法使用ping命令

bash-5.0$ ping 172.18.0.4 ping 172.18.0.4 (172.18.0.4): 56 data bytes ping: permission denied (are you root?) #無法直接切換到root bash-5.0$ su root

su: must be suid to work properly

bash-5.0$ which ping /bin/ping #進入bin目錄檢視ping 許可權發現實際路徑在/bin/busybox bash-5.0$ cd /bin/ bash-5.0$ ls -l ping lrwxrwxrwx 1 root root 12 may 29 14:20 ping -> /bin/busybox bash-5.0$ ls -l /bin/busybox

-rwxr-xr-x 1 root root 841288 may 22 06:59 /bin/busybox

#也可以一鍵使用這個命令
$ docker exec -u root 75 chmod u+s /bin/busybox
root@u-55:/etc/docker# docker exec -u root -it 75 sh
/usr/share/zabbix # chmod u+s /bin/busybox
/usr/share/zabbix # ping 172.18.0.3
ping 172.18.0.3 (172.18.0.3): 56 data bytes
64 bytes from 172.18.0.3: seq=0 ttl=64 time=0.105 ms
64 bytes from 172.18.0.3: seq=1 ttl=64 time=0.055 ms
64 bytes from 172.18.0.3: seq=2 ttl=64 time=0.070 ms

#ping 也可以使用
root@u-55:/etc/docker# docker exec -it 75 sh
/usr/share/zabbix $ ping 172.18.0.3
ping 172.18.0.3 (172.18.0.3): 56 data bytes
64 bytes from 172.18.0.3: seq=0 ttl=64 time=0.089 ms
64 bytes from 172.18.0.3: seq=1 ttl=64 time=0.055 ms

ps:使用–help檢視如何使用root賬戶進入

root@u-55:/etc/docker# docker exec --help usage: docker exec [options] container command [arg...] run a command in a running container options: -d, --detach detached mode: run command in the background --detach-keys string override the key sequence for detaching a container -e, --env list set environment variables -i, --interactive keep stdin open even if not attached --privileged give extended privileges to the command -t, --tty allocate a pseudo-tty -u, --user string username or uid (format: [:])

-w, --workdir string working directory inside the container

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