Estou um pouco confuso que dentro de um contêiner do Docker lsof -i não produza nenhuma saída.
Exemplo (todos os comandos / saída de dentro do contêiner):
[1] root@ec016481cf5f:/# lsof -i
[1] root@ec016481cf5f:/# netstat -tulpn
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN -
tcp6 0 0 :::22 :::* LISTEN -
Por favor, note também que nenhum PID ou nome do programa é mostrado por netstat . fuser também fornece resultados um pouco confusos e é incapaz de identificar os PIDs também.
Alguém pode lançar alguma luz sobre isso?
- Como posso substituir
lsof -i (para ver o nome do processo também!)
- Por que a saída de
netstat está prejudicada também?
NB: O contêiner é executado com "ExecDriver": "native-0.1" , que é a camada de execução do Docker, não o LXC.
[1] root@ec016481cf5f:/# fuser -a4n tcp 22
Cannot stat file /proc/1/fd/0: Permission denied
Cannot stat file /proc/1/fd/1: Permission denied
Cannot stat file /proc/1/fd/2: Permission denied
Cannot stat file /proc/1/fd/3: Permission denied
Cannot stat file /proc/1/fd/255: Permission denied
Cannot stat file /proc/6377/fd/0: Permission denied
Cannot stat file /proc/6377/fd/1: Permission denied
Cannot stat file /proc/6377/fd/2: Permission denied
Cannot stat file /proc/6377/fd/3: Permission denied
Cannot stat file /proc/6377/fd/4: Permission denied
22/tcp:
(Eu não estou obcecado pelo Permission denied , porque isso figura. O que me confunde é a lista vazia de PIDs após 22/tcp .)
# lsof|awk '$1 ~ /^sshd/ && $3 ~ /root/ {print}'
sshd 6377 root cwd unknown /proc/6377/cwd (readlink: Permission denied)
sshd 6377 root rtd unknown /proc/6377/root (readlink: Permission denied)
sshd 6377 root txt unknown /proc/6377/exe (readlink: Permission denied)
sshd 6377 root 0 unknown /proc/6377/fd/0 (readlink: Permission denied)
sshd 6377 root 1 unknown /proc/6377/fd/1 (readlink: Permission denied)
sshd 6377 root 2 unknown /proc/6377/fd/2 (readlink: Permission denied)
sshd 6377 root 3 unknown /proc/6377/fd/3 (readlink: Permission denied)
sshd 6377 root 4 unknown /proc/6377/fd/4 (readlink: Permission denied)
sshd 6442 root cwd unknown /proc/6442/cwd (readlink: Permission denied)
sshd 6442 root rtd unknown /proc/6442/root (readlink: Permission denied)
sshd 6442 root txt unknown /proc/6442/exe (readlink: Permission denied)
sshd 6442 root 0 unknown /proc/6442/fd/0 (readlink: Permission denied)
sshd 6442 root 1 unknown /proc/6442/fd/1 (readlink: Permission denied)
sshd 6442 root 2 unknown /proc/6442/fd/2 (readlink: Permission denied)
sshd 6442 root 3 unknown /proc/6442/fd/3 (readlink: Permission denied)
sshd 6442 root 4 unknown /proc/6442/fd/4 (readlink: Permission denied)
sshd 6442 root 5 unknown /proc/6442/fd/5 (readlink: Permission denied)
Existe mais alguma saída para o usuário conectado, que também é identificado corretamente, mas é isso. É aparentemente impossível discernir de qual tipo ( lsof -i limita aos sockets de internet) um certo "objeto" é.