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Accepted
James B. Byrne
Asked: 2019-12-13 13:39:08 +0800 CST

FreeBSD-12 IOCage modifying a jail's /root directory

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What is the reason that copying .bash_profile from the host system into the /root directory of an iocage thin jail does not create a file that is visible to the root user when logged on to that jail?

In other words, if I do this from the host system:

cp -p .bash_profile /zroot/iocage/jails/testjail/root/

Then ls -al /zroot/iocage/jails/testjail/root/.bash_profile shows that the file exists.

ls -al /zroot/iocage/jails/testjail/root/.bash_profile
-rwxr-xr-x  1 root  wheel  3274 Dec 12 15:42 /zroot/iocage/jails/testjail/root/.bash_profile

However, when I log on to testjail the file is not visible to the root user:

iocage console testjail
ls -a .bash_profile
ls: .bash_profile: No such file or directory

If I check the mounts on the host system then amoung other things I see this:

zroot/iocage/jails/testjail/root on /zroot/iocage/jails/testjail/root (zfs, local, noatime, nfsv4acls)

Which I believe is the source of my difficulty. How do I put a file into the /root directory of an iocage jail so that it is usable by the root user inside the jail?

freebsd

2 Answers

  1. zroot/iocage/jails/testjail/root on /zroot/iocage/jails/testjail/root (zfs, local, noatime, nfsv4acls)

    Q: "... mounts on the host system ... is the source of my difficulty. How do I put a file into the /root directory of an iocage jail so that it is usable by the root user inside the jail?"

    A: FWIW. A test file created in a similar mount-point

    zroot/jails/test_01 on /local/jails/test_01 (zfs, local, nfsv4acls)

    $ touch /local/jails/test_01/root/TEST-FILE
$ ll /local/jails/test_01/root/TEST-FILE 
-rw-r--r--  1 root  wheel  0 Dec 13 12:56 /local/jails/test_01/root/TEST-FILE

    is available to root

    $ ssh admin@test_01
$ sudo su
root@test_01:/home/admin # bash
root@test_01:/home/admin # cd /root
root@test_01:~ # ll /root/TEST-FILE
-rw-r--r--  1 root  wheel  0 Dec 13 11:56 /root/TEST-FILE

    Notes:

    • FreeBSD jails.example.com 12.0-RELEASE FreeBSD 12.0-RELEASE r341666 GENERIC i386
    • Jails created with the Ansible role.
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  2. Best Answer

    The directory /zroot/iocage/jails/testjail/root/ is not the home directory of the root user; /zroot/iocage/jails/testjail/root/root/ is.

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