Phantom folder instead of /var. Solved.

[vab]

Hello.

I have "Debian GNU/Linux 9 (stretch)" on CubieTruck.

After installing Apache2 i get problems with /var folder (that is symlink on hdd folder). Apache2 dont see files in it.

So i print stat for this folder from commandline and from php in Apache.

 

That is from command line:

root@cubietruck:/mnt/var/armbian/apache2/www/html# stat /mnt/var/armbian/var
  File: /mnt/var/armbian/var
  Size: 4096            Blocks: 8          IO Block: 4096   directory
Device: 801h/2049d      Inode: 2097154     Links: 13
Access: (0755/drwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2018-02-10 14:35:14.025501481 +0300
Modify: 2018-02-04 09:15:43.851540893 +0300
Change: 2018-02-04 09:15:43.851540893 +0300
 Birth: -

 

That is from Apache2

  File: /mnt/var/armbian/var
  Size: 4096          Blocks: 8          IO Block: 4096   directory
Device: 801h/2049d    Inode: 2230756     Links: 2
Access: (1777/drwxrwxrwt)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2018-02-10 15:01:32.557383721 +0300
Modify: 2018-02-09 15:38:21.581012744 +0300
Change: 2018-02-09 15:38:21.581012744 +0300
 Birth: -

It seems that these are two different folders. I thought that because of tmpfiles.d, but I do not see any using of /var folder there (only its subfolders).

Orient me please, how I can determine what process do this. Or may be somebody already solved similar problems.

 

Thank you.

 

[vab]

Update: fantom /var folder are changed after restart of Apache2.

With inode number i have found folders.

root@cubietruck:/mnt/var/armbian/var/tmp# ls -l
total 12
drwx------ 3 root root 4096 фев 10 16:55 systemd-private-c39fdc92c0e249339c8c9c86e133aec6-apache2.service-EKP58e
drwx------ 3 root root 4096 фев  8 17:47 systemd-private-c39fdc92c0e249339c8c9c86e133aec6-dovecot.service-K64yjF
drwx------ 3 root root 4096 фев  6 18:10 systemd-private-c39fdc92c0e249339c8c9c86e133aec6-haveged.service-cFoGr4

At least apache2 and dovecot work incorrectly. I have not dealt with the third one yet.

What service can do that?

Edited February 10, 2018 by vab
rectification

[vab]

When i set up PrivetTmp=false in /lib/systemd/system/apache2.service then Apache2 sees right /var folder. But then Apache has access to all /tmp files. That is not good. Is there some place in systemd where necessary changes can be done. As i understand /var is not temp folder. But Systemd considers it temporary.

[vab]

The problem is solved.
The systemd works erroneously with the PrivetTmp=true when /var is a symlink. Instead of mapping an empty disk to /var/tmp systemd maps it to /var.