常见ns

mnt

uts

ipc

pid


lsns:查看容器的ns 


[root@182 ~]# lsns
        NS TYPE  NPROCS   PID USER    COMMAND
4026531836 pid      256     1 root    /usr/lib/systemd/systemd --switched-root --system --deserialize 22
4026531856 mnt        1    88 root    kdevtmpfs
4026531962 net      256     1 root    /usr/lib/systemd/systemd --switched-root --system --deserialize 22
4026532276 mnt        1   886 root    /usr/sbin/NetworkManager --no-daemon
4026532277 mnt        1   921 chrony  /usr/sbin/chronyd
4026532281 mnt        1 53383 polkitd mysqld --default-authentication-plugin=mysql_native_password --character-set-server=utf8mb4 --coll
4026532286 net        1 53383 polkitd mysqld --default-authentication-plugin=mysql_native_password --character-set-server=utf8mb4 --coll
4026532601 mnt        1 55144 polkitd redis-server *:6379         
4026532602 uts        1 55144 polkitd redis-server *:6379         
4026532603 ipc        1 55144 polkitd redis-server *:6379

nsenter ：容器进入namespace


安装
wget https://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.37/util-linux-2.37.2.tar.gz --no-check-certificate
tar -xf util-linux-2.37.2.tar.gz 
cd util-linux-2.37.2/
./configure --without-ncurses
make nsenter

进入容器ns
PID=$(docker inspect --format {{.State.Pid}} <container_name_or_ID>)
nsenter --target $PID --mount --uts --ipc --net --pid