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Published 20 hours ago • verified publisher icon idistech

Racecondition

Open adoerler opened this issue 6 years ago • 8 comments

Hi idistech,

thanks for providing this script.

On the first sight everything looked good, but after doing some tests in real life I'm constantly running into a race condition where the source folders permissions get changed while sync is still in progress.

I'm trying to use Syncthing to keep Kubernetes Persistent Volumens in sync.

Here is my test case:

node1 has a demo WordPress (about 6k files + directories) installation unter /testsrc/wordpress, which looks like:

drwxr-xr-x  6 www-data www-data 1,0K Dez  2 21:33 .
drwxr-x--- 12 root     root     4,0K Dez  2 21:33 ..
-rw-r--r--  1 www-data www-data  296 Mai  9  2018 .htaccess
-rw-r--r--  1 www-data www-data  418 Sep 25  2013 index.php
-rw-r--r--  1 www-data www-data  20K Mai  8  2018 license.txt
-rw-r--r--  1 www-data www-data 8,6K Mai  8  2018 liesmich.html
drwx------  2 root     root      12K Mai  8  2018 lost+found
-rw-r--r--  1 www-data www-data 7,3K Mai  8  2018 readme.html
-rw-r--r--  1 www-data www-data 5,4K Mai  8  2018 wp-activate.php
drwxr-xr-x  9 www-data www-data 4,0K Feb  6  2018 wp-admin
-rw-r--r--  1 www-data www-data  364 Dez 19  2015 wp-blog-header.php
-rw-r--r--  1 www-data www-data 1,6K Aug 29  2016 wp-comments-post.php
-rw-r--r--  1 www-data www-data 3,2K Dez  2 21:33 wp-config.php
-rw-r--r--  1 www-data www-data 3,6K Dez  2 21:33 wp-config-sample.php
drwxr-xr-x  7 www-data www-data 1,0K Dez  2 23:11 wp-content
-rw-r--r--  1 www-data www-data 3,6K Aug 20  2017 wp-cron.php
drwxr-xr-x 18 www-data www-data 8,0K Feb  6  2018 wp-includes
-rw-r--r--  1 www-data www-data 2,4K Nov 21  2016 wp-links-opml.php
-rw-r--r--  1 www-data www-data 3,3K Aug 22  2017 wp-load.php
-rw-r--r--  1 www-data www-data  36K Mai  8  2018 wp-login.php
-rw-r--r--  1 www-data www-data 7,9K Jän 11  2017 wp-mail.php
-rw-r--r--  1 www-data www-data  16K Okt  4  2017 wp-settings.php
-rw-r--r--  1 www-data www-data  30K Okt 18  2017 wp-signup.php
-rw-r--r--  1 www-data www-data 4,6K Okt 24  2017 wp-trackback.php
-rw-r--r--  1 www-data www-data 3,0K Aug 31  2016 xmlrpc.php

Both machines (node1 and node2) have a /testdir/vol-001 where Syncthing is configured to sync in both directions. On both machines syncthing-acl is running and watching /testdir. The .acls is in `/testdir/.acls'.

  • Now I start with copiing the WordPress installation into node1 sync dir, i.e.:

    • cp -aT /testsrc/wordpress /testdir/vol-001

  • Syncthing and syncthing-acl are both starting their work:

    • On node2 files and folders appear with root:root as Syncthing runs as root
    • At some point the permissions on node2 are getting updated - which is fine :-)
    • BUT at some point the permissions on node1 start changing too! They get change to root:root
      • I guess syncthing-acl found those new files on node2 created with root:root and writes this information to its .acls direcotry which is synced back to node1... At this point we have messed up the original permissions.

This is how it looks on node1 after sync has finished:

drwxr-xr-x   6 www-data www-data 4,0K Dez  2 21:33 .
drwxr-xr-x 104 root     root     4,0K Dez  3 14:40 ..
-rw-r--r--   1 www-data www-data  296 Mai  9  2018 .htaccess
-rw-r--r--   1 root     root      418 Sep 25  2013 index.php
-rw-r--r--   1 root     root      20K Mai  8  2018 license.txt
-rw-r--r--   1 www-data www-data 8,6K Mai  8  2018 liesmich.html
drwx------   2 root     root     4,0K Mai  8  2018 lost+found
-rw-r--r--   1 root     root     7,3K Mai  8  2018 readme.html
-rw-r--r--   1 root     root     5,4K Mai  8  2018 wp-activate.php
drwxr-xr-x   9 www-data www-data 4,0K Feb  6  2018 wp-admin
-rw-r--r--   1 root     root      364 Dez 19  2015 wp-blog-header.php
-rw-r--r--   1 www-data www-data 1,6K Aug 29  2016 wp-comments-post.php
-rw-r--r--   1 www-data www-data 3,2K Dez  2 21:33 wp-config.php
-rw-r--r--   1 root     root     3,6K Dez  2 21:33 wp-config-sample.php
drwxr-xr-x   7 www-data www-data 4,0K Dez  2 23:11 wp-content
-rw-r--r--   1 www-data www-data 3,6K Aug 20  2017 wp-cron.php
drwxr-xr-x  18 www-data www-data  12K Feb  6  2018 wp-includes
-rw-r--r--   1 www-data www-data 2,4K Nov 21  2016 wp-links-opml.php
-rw-r--r--   1 www-data www-data 3,3K Aug 22  2017 wp-load.php
-rw-r--r--   1 root     root      36K Mai  8  2018 wp-login.php
-rw-r--r--   1 www-data www-data 7,9K Jän 11  2017 wp-mail.php
-rw-r--r--   1 www-data www-data  16K Okt  4  2017 wp-settings.php
-rw-r--r--   1 www-data www-data  30K Okt 18  2017 wp-signup.php
-rw-r--r--   1 root     root     4,6K Okt 24  2017 wp-trackback.php
-rw-r--r--   1 root     root     3,0K Aug 31  2016 xmlrpc.php

And here is node2:

drwxr-xr-x   6 www-data www-data 4,0K Dez  3 15:30 .
drwxr-xr-x 104 root     root     4,0K Dez  3 14:40 ..
-rw-r--r--   1 www-data www-data  296 Mai  9  2018 .htaccess
-rw-r--r--   1 root     root      418 Sep 25  2013 index.php
-rw-r--r--   1 root     root      20K Mai  8  2018 license.txt
-rw-r--r--   1 www-data www-data 8,6K Mai  8  2018 liesmich.html
drwx------   2 root     root     4,0K Dez  3 15:18 lost+found
-rw-r--r--   1 root     root     7,3K Mai  8  2018 readme.html
-rw-r--r--   1 root     root     5,4K Mai  8  2018 wp-activate.php
drwxr-xr-x   9 root     root     4,0K Dez  3 15:30 wp-admin
-rw-r--r--   1 root     root      364 Dez 19  2015 wp-blog-header.php
-rw-r--r--   1 www-data www-data 1,6K Aug 29  2016 wp-comments-post.php
-rw-r--r--   1 www-data www-data 3,2K Dez  2 21:33 wp-config.php
-rw-r--r--   1 root     root     3,6K Dez  2 21:33 wp-config-sample.php
drwxr-xr-x   7 root     root     4,0K Dez  3 15:28 wp-content
-rw-r--r--   1 www-data www-data 3,6K Aug 20  2017 wp-cron.php
drwxr-xr-x  18 root     root      12K Dez  3 15:30 wp-includes
-rw-r--r--   1 www-data www-data 2,4K Nov 21  2016 wp-links-opml.php
-rw-r--r--   1 www-data www-data 3,3K Aug 22  2017 wp-load.php
-rw-r--r--   1 root     root      36K Mai  8  2018 wp-login.php
-rw-r--r--   1 www-data www-data 7,9K Jän 11  2017 wp-mail.php
-rw-r--r--   1 www-data www-data  16K Okt  4  2017 wp-settings.php
-rw-r--r--   1 www-data www-data  30K Okt 18  2017 wp-signup.php
-rw-r--r--   1 root     root     4,6K Okt 24  2017 wp-trackback.php
-rw-r--r--   1 root     root     3,0K Aug 31  2016 xmlrpc.php

If I do the test again from scratch - other files or folders would be root:root - but unfortunately it never works as expected :)

Your ToDo states:

  • Race conditions ? May Occur, but unknown.

I think this is a use case where such a race conditions occur.

Do you have an idea or possible workaround to fix this problem?

Best regards Andreas

adoerler avatar Dec 03 '18 15:12 adoerler

Hi Andreas,

To be honest, Ive not been using this for a while, although can still see the need.. and will help as much as possible.

There was a 'jitter' value, to look for such conditions - are the two machines time synced ( to to within the 'jitter' value - time delta+inotify time + syncthing-acl run time + syncthing transfer time < jiitter time )).

It seems that the inotify must be triggering on node1, for a chmod/chown change - which it shouldnt do.

can I suggest you try increasing the Jitter, restarting the syncthing-acl on both machines ( which causes a resync ).. and ensure its 'stable'

there is also a debug flag.

I did have some success running this for a long time - but havnt in recent OS releases ( so my next port of call would be to check inotify and that the flags/triggers havnt changed )...

Really this needs tidying into a perl script or something..

Happy to help where I can, but do have limited debug capability at this time.

G

On 03/12/2018 15:29, Andreas wrote:

Hi idistech,

thanks for providing this script.

On the first sight everything looked good, but after doing some tests in real life I'm constantly running into a race condition where the source folders permissions get changed while sync is still in progress.

I'm trying to use Syncthing to keep Kubernetes Persistent Volumens in sync.

Here is my test case:

|node1| has a demo WordPress (about 6k files + directories) installation unter |/testsrc/wordpress|, which looks like:

|drwxr-xr-x 6 www-data www-data 1,0K Dez 2 21:33 . drwxr-x--- 12 root root 4,0K Dez 2 21:33 .. -rw-r--r-- 1 www-data www-data 296 Mai 9 2018 .htaccess -rw-r--r-- 1 www-data www-data 418 Sep 25 2013 index.php -rw-r--r-- 1 www-data www-data 20K Mai 8 2018 license.txt -rw-r--r-- 1 www-data www-data 8,6K Mai 8 2018 liesmich.html drwx------ 2 root root 12K Mai 8 2018 lost+found -rw-r--r-- 1 www-data www-data 7,3K Mai 8 2018 readme.html -rw-r--r-- 1 www-data www-data 5,4K Mai 8 2018 wp-activate.php drwxr-xr-x 9 www-data www-data 4,0K Feb 6 2018 wp-admin -rw-r--r-- 1 www-data www-data 364 Dez 19 2015 wp-blog-header.php -rw-r--r-- 1 www-data www-data 1,6K Aug 29 2016 wp-comments-post.php -rw-r--r-- 1 www-data www-data 3,2K Dez 2 21:33 wp-config.php -rw-r--r-- 1 www-data www-data 3,6K Dez 2 21:33 wp-config-sample.php drwxr-xr-x 7 www-data www-data 1,0K Dez 2 23:11 wp-content -rw-r--r-- 1 www-data www-data 3,6K Aug 20 2017 wp-cron.php drwxr-xr-x 18 www-data www-data 8,0K Feb 6 2018 wp-includes -rw-r--r-- 1 www-data www-data 2,4K Nov 21 2016 wp-links-opml.php -rw-r--r-- 1 www-data www-data 3,3K Aug 22 2017 wp-load.php -rw-r--r-- 1 www-data www-data 36K Mai 8 2018 wp-login.php -rw-r--r-- 1 www-data www-data 7,9K Jän 11 2017 wp-mail.php -rw-r--r-- 1 www-data www-data 16K Okt 4 2017 wp-settings.php -rw-r--r-- 1 www-data www-data 30K Okt 18 2017 wp-signup.php -rw-r--r-- 1 www-data www-data 4,6K Okt 24 2017 wp-trackback.php -rw-r--r-- 1 www-data www-data 3,0K Aug 31 2016 xmlrpc.php |

Both machines (|node1| and |node2|) have a |/testdir/vol-001| where Syncthing is configured to sync in both directions. On both machines syncthing-acl is running and watching |/testdir|. The |.acls| is in `/testdir/.acls'.

Now I start with copiing the WordPress installation into node1
sync dir, i.e.:

  o |cp -aT /testsrc/wordpress /testdir/vol-001|

Syncthing and syncthing-acl are both starting their work:

  o On |node2| files and folders appear with |root:root| as
    Syncthing runs as |root|
  o At some point the permissions on |node2| are getting updated -
    which is fine :-)
  o BUT at some point the permissions on |node1| start changing
    too! They get change to |root:root|
      + I guess syncthing-acl found those new files on node2
        created with |root:root| and writes this information to
        its |.acls| direcotry which is synced back to node1... At
        this point we have messed up the original permissions.

This is how it looks on node1 after sync has finished:

|drwxr-xr-x 6 www-data www-data 4,0K Dez 2 21:33 . drwxr-xr-x 104 root root 4,0K Dez 3 14:40 .. -rw-r--r-- 1 www-data www-data 296 Mai 9 2018 .htaccess -rw-r--r-- 1 root root 418 Sep 25 2013 index.php -rw-r--r-- 1 root root 20K Mai 8 2018 license.txt -rw-r--r-- 1 www-data www-data 8,6K Mai 8 2018 liesmich.html drwx------ 2 root root 4,0K Mai 8 2018 lost+found -rw-r--r-- 1 root root 7,3K Mai 8 2018 readme.html -rw-r--r-- 1 root root 5,4K Mai 8 2018 wp-activate.php drwxr-xr-x 9 www-data www-data 4,0K Feb 6 2018 wp-admin -rw-r--r-- 1 root root 364 Dez 19 2015 wp-blog-header.php -rw-r--r-- 1 www-data www-data 1,6K Aug 29 2016 wp-comments-post.php -rw-r--r-- 1 www-data www-data 3,2K Dez 2 21:33 wp-config.php -rw-r--r-- 1 root root 3,6K Dez 2 21:33 wp-config-sample.php drwxr-xr-x 7 www-data www-data 4,0K Dez 2 23:11 wp-content -rw-r--r-- 1 www-data www-data 3,6K Aug 20 2017 wp-cron.php drwxr-xr-x 18 www-data www-data 12K Feb 6 2018 wp-includes -rw-r--r-- 1 www-data www-data 2,4K Nov 21 2016 wp-links-opml.php -rw-r--r-- 1 www-data www-data 3,3K Aug 22 2017 wp-load.php -rw-r--r-- 1 root root 36K Mai 8 2018 wp-login.php -rw-r--r-- 1 www-data www-data 7,9K Jän 11 2017 wp-mail.php -rw-r--r-- 1 www-data www-data 16K Okt 4 2017 wp-settings.php -rw-r--r-- 1 www-data www-data 30K Okt 18 2017 wp-signup.php -rw-r--r-- 1 root root 4,6K Okt 24 2017 wp-trackback.php -rw-r--r-- 1 root root 3,0K Aug 31 2016 xmlrpc.php |

And here is node2:

|drwxr-xr-x 6 www-data www-data 4,0K Dez 3 15:30 . drwxr-xr-x 104 root root 4,0K Dez 3 14:40 .. -rw-r--r-- 1 www-data www-data 296 Mai 9 2018 .htaccess -rw-r--r-- 1 root root 418 Sep 25 2013 index.php -rw-r--r-- 1 root root 20K Mai 8 2018 license.txt -rw-r--r-- 1 www-data www-data 8,6K Mai 8 2018 liesmich.html drwx------ 2 root root 4,0K Dez 3 15:18 lost+found -rw-r--r-- 1 root root 7,3K Mai 8 2018 readme.html -rw-r--r-- 1 root root 5,4K Mai 8 2018 wp-activate.php drwxr-xr-x 9 root root 4,0K Dez 3 15:30 wp-admin -rw-r--r-- 1 root root 364 Dez 19 2015 wp-blog-header.php -rw-r--r-- 1 www-data www-data 1,6K Aug 29 2016 wp-comments-post.php -rw-r--r-- 1 www-data www-data 3,2K Dez 2 21:33 wp-config.php -rw-r--r-- 1 root root 3,6K Dez 2 21:33 wp-config-sample.php drwxr-xr-x 7 root root 4,0K Dez 3 15:28 wp-content -rw-r--r-- 1 www-data www-data 3,6K Aug 20 2017 wp-cron.php drwxr-xr-x 18 root root 12K Dez 3 15:30 wp-includes -rw-r--r-- 1 www-data www-data 2,4K Nov 21 2016 wp-links-opml.php -rw-r--r-- 1 www-data www-data 3,3K Aug 22 2017 wp-load.php -rw-r--r-- 1 root root 36K Mai 8 2018 wp-login.php -rw-r--r-- 1 www-data www-data 7,9K Jän 11 2017 wp-mail.php -rw-r--r-- 1 www-data www-data 16K Okt 4 2017 wp-settings.php -rw-r--r-- 1 www-data www-data 30K Okt 18 2017 wp-signup.php -rw-r--r-- 1 root root 4,6K Okt 24 2017 wp-trackback.php -rw-r--r-- 1 root root 3,0K Aug 31 2016 xmlrpc.php |

If I do the test again from scratch - other files or folders would be |root:root| - but unfortunately it never works as expected :)

Your ToDo states:

  • |Race conditions ? May Occur, but unknown.|

I think this is a use case where such a race conditions occur.

Do you have an idea or possible workaround to fix this problem?

Best regards Andreas

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idistech avatar Dec 03 '18 15:12 idistech

Hey Gary,

thanks for your fast response! The two machines are in timesync! I give it a try with a JITTER set to 3600 seconds (sync speed of ACLs is not too time critical in my setup) and I'll report back later.

About the OS: I'm on Ubuntu 16.04 and I'll be soon on 18.04.

To make it work on Ubuntu 16.04. I had to additionally apt-get install bc and create a systemd unit-file, as in this repro there is only a upstart config. My unit looks like:

sudo touch /etc/systemd/system/[email protected]
sudo chmod 644 /etc/systemd/system/[email protected]
sudo vim  /etc/systemd/system/[email protected]

[Unit]
Description=Syncthing ACL - for %I
After=network.target

[Service]
User=%i
ExecStart=/usr/local/bin/syncthing-acl.sh
Restart=on-failure
SuccessExitStatus=3 4
RestartForceExitStatus=3 4

[Install]
WantedBy=multi-user.target

sudo systemctl enable [email protected]
sudo systemctl start [email protected]

Really this needs tidying into a perl script or something..

As far as I've seen they've implemented syncing file permissions on SyncThing-side in the meantime. So setfacls shouldn't be needed anymore, just the getfacls in combination with chown ...

Best Regards Andreas

adoerler avatar Dec 03 '18 17:12 adoerler

Hi,

I'm back with test results. As increasing FILEJITTER didn't help I tried to get a minimal test case with corresponding log files. I can reproduce the problem with only a few files. It seems that the ACL-files get in conflict state:

The test files have the ownership www-data:www-data:

root@node1:# ls -lah /testsrc/wordpress/wp-l*
-rw-r--r-- 1 www-data www-data 2,4K Nov 21  2016 /testsrc/wordpress/wp-links-opml.php
-rw-r--r-- 1 www-data www-data 3,3K Aug 22  2017 /testsrc/wordpress/wp-load.php
-rw-r--r-- 1 www-data www-data  36K Mai  8  2018 /testsrc/wordpress/wp-login.php

I copy these 3 files to the syned directory on node1

root@node1:# /bin/cp -a /testsrc/wordpress/wp-l* /pv/sc-hdd/vol-044/

Syncthing shows the following changelog:

Gerät	Aktion	Typ	Ordner	Pfad	Zeit
node1	modified	file	sc-hdd	.acls/vol-044/wp-links-opml.php	2018-12-03 21:34:31
node1	modified	file	sc-hdd	vol-044/wp-load.php	2018-12-03 21:34:31
node1	modified	file	sc-hdd	vol-044/wp-login.php	2018-12-03 21:34:31
node1	modified	file	sc-hdd	.acls/vol-044/wp-login.php	2018-12-03 21:34:31
node1	modified	file	sc-hdd	vol-044/wp-links-opml.php	2018-12-03 21:34:31
node1	modified	file	sc-hdd	.acls/vol-044/wp-load.php	2018-12-03 21:34:31
node2	modified	file	sc-hdd	.acls/vol-044/wp-links-opml.php	2018-12-03 21:34:33
node2	modified	file	sc-hdd	.acls/vol-044/wp-load.php	2018-12-03 21:34:33
node2	modified	file	sc-hdd	.acls/vol-044/wp-login.php	2018-12-03 21:34:33
node1	added	file	sc-hdd	.acls/vol-044/wp-links-opml.sync-conflict-20181203-213433-ZXAZ2BO.php	2018-12-03 21:34:41
node1	added	file	sc-hdd	.acls/vol-044/wp-login.sync-conflict-20181203-213433-ZXAZ2BO.php	2018-12-03 21:34:41
node1	modified	file	sc-hdd	.acls/vol-044/wp-load.php	2018-12-03 21:34:41
node1	added	file	sc-hdd	.acls/vol-044/wp-load.sync-conflict-20181203-213433-ZXAZ2BO.php	2018-12-03 21:34:41
node1	modified	file	sc-hdd	.acls/vol-044/wp-login.php	2018-12-03 21:34:41

Here you can see the conflicts. It looks like node2 changes the acl file too instead of just propagating the changes to the referred files?

I've enabled the DEBUG log which you can find here, maybe you are able to identify a problem there: https://pastebin.com/tubEDt86

Finaly it ends up with root:root on both nodes instead www-data:www-data

node1
ls -lah /pv/sc-hdd/vol-044/
-rw-r--r--   1 root     root     2,4K Nov 21  2016 wp-links-opml.php
-rw-r--r--   1 root     root     3,3K Aug 22  2017 wp-load.php
-rw-r--r--   1 root     root      36K Mai  8  2018 wp-login.php

node2
ls -lah /pv/sc-hdd/vol-044/
-rw-r--r--   1 root     root     2,4K Nov 21  2016 wp-links-opml.php
-rw-r--r--   1 root     root     3,3K Aug 22  2017 wp-load.php
-rw-r--r--   1 root     root      36K Mai  8  2018 wp-login.php

Best Regards and many thanks in advance Andreas

adoerler avatar Dec 03 '18 21:12 adoerler

ok - ill try and have a look ...

best

On 03/12/2018 21:29, Andreas wrote:

Hi,

I'm back with test results. As increasing |FILEJITTER| didn't help I tried to get a minimal test case with corresponding log files. I can reproduce the problem with only a few files. It seems that the ACL-files get in conflict state:

The test files have the ownership |www-data:www-data|:

root@node1:# ls -lah /testsrc/wordpress/wp-l* -rw-r--r-- 1 www-data www-data 2,4K Nov 21 2016 /testsrc/wordpress/wp-links-opml.php -rw-r--r-- 1 www-data www-data 3,3K Aug 22 2017 /testsrc/wordpress/wp-load.php -rw-r--r-- 1 www-data www-data 36K Mai 8 2018 /testsrc/wordpress/wp-login.php

I copy these 3 files to the syned directory on node1

root@node1:# /bin/cp -a /testsrc/wordpress/wp-l* /pv/sc-hdd/vol-044/

Syncthing shows the following changelog:

|Gerät Aktion Typ Ordner Pfad Zeit node1 modified file sc-hdd .acls/vol-044/wp-links-opml.php 2018-12-03 21:34:31 node1 modified file sc-hdd vol-044/wp-load.php 2018-12-03 21:34:31 node1 modified file sc-hdd vol-044/wp-login.php 2018-12-03 21:34:31 node1 modified file sc-hdd .acls/vol-044/wp-login.php 2018-12-03 21:34:31 node1 modified file sc-hdd vol-044/wp-links-opml.php 2018-12-03 21:34:31 node1 modified file sc-hdd .acls/vol-044/wp-load.php 2018-12-03 21:34:31 node2 modified file sc-hdd .acls/vol-044/wp-links-opml.php 2018-12-03 21:34:33 node2 modified file sc-hdd .acls/vol-044/wp-load.php 2018-12-03 21:34:33 node2 modified file sc-hdd .acls/vol-044/wp-login.php 2018-12-03 21:34:33 node1 added file sc-hdd .acls/vol-044/wp-links-opml.sync-conflict-20181203-213433-ZXAZ2BO.php 2018-12-03 21:34:41 node1 added file sc-hdd .acls/vol-044/wp-login.sync-conflict-20181203-213433-ZXAZ2BO.php 2018-12-03 21:34:41 node1 modified file sc-hdd .acls/vol-044/wp-load.php 2018-12-03 21:34:41 node1 added file sc-hdd .acls/vol-044/wp-load.sync-conflict-20181203-213433-ZXAZ2BO.php 2018-12-03 21:34:41 node1 modified file sc-hdd .acls/vol-044/wp-login.php 2018-12-03 21:34:41 |

Here you can see the conflicts. It looks like node2 changes the acl file too instead of just propagating the changes to the referred files?

I've enabled the DEBUG log which you can find here, maybe you are able to identify a problem there: https://pastebin.com/tubEDt86

Finaly it ends up with |root:root| on both nodes instead |www-data:www-data|

|node1 ls -lah /pv/sc-hdd/vol-044/ -rw-r--r-- 1 root root 2,4K Nov 21 2016 wp-links-opml.php -rw-r--r-- 1 root root 3,3K Aug 22 2017 wp-load.php -rw-r--r-- 1 root root 36K Mai 8 2018 wp-login.php node2 ls -lah /pv/sc-hdd/vol-044/ -rw-r--r-- 1 root root 2,4K Nov 21 2016 wp-links-opml.php -rw-r--r-- 1 root root 3,3K Aug 22 2017 wp-load.php -rw-r--r-- 1 root root 36K Mai 8 2018 wp-login.php |

Best Regards and many thanks in advance Andreas

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idistech avatar Dec 03 '18 21:12 idistech

Hey Gary,

I did some further testing.

I'm pretty sure that the Syncthing Permission Features is interfering with your setfacl.

First try:

  • comment out all setfacl in your code and remove the attrib parameter from inotifywait

This look promising at the first sight... the test with 3 files worked... but after moving the whole WordPress folder, there were still some files/folders which got reflected back to root:root

Second try:

  • set ignorePerms="true" in Syncthing for this folder
  • reenable setfacl and attrib in you script

In this scenario I got the best results.

image

But I'm still running in to sync conflicts within the ACL's directory:

node2:~$ ls /pv/sc-hdd/.acls/vol-044/wp-includes_folder* -lah
-rw-r--r-- 1 root root 108 Dez  6 08:22 /pv/sc-hdd/.acls/vol-044/wp-includes_folder
-rw-r--r-- 1 root root 100 Dez  6 08:22 /pv/sc-hdd/.acls/vol-044/wp-includes_folder.sync-conflict-20181206-082244-PQOWJ5X

And those sync-conflicts correspond to the files/folders with the wrong permissions.

Any ideas?

BR Andreas

adoerler avatar Dec 06 '18 07:12 adoerler

Hi,

back again with hopefully interesting news:

Ultra simple test case with one file. CASE1 did succeed ending up having the files replicated as www-data:www-data to node2 CASE2 failed ending up in having the file root:root on both sides

This tests just run after each other. I delete the file, wait until everything is synced, than copy it into the sync folder and wait... I can replicated it. Sometimes it works, often not.

Let's compare the logs:

  • CASE1: Sucessful Syncthing Log
node1	modified	file	sc-hdd	vol-044/wp-login.php	        2018-12-06 10:40:12
node1	modified	file	acl	sc-hdd/vol-044/wp-login.php	2018-12-06 10:40:12
node2	modified	file	acl	sc-hdd/vol-044/wp-login.php	2018-12-06 10:40:22
  • CASE1: Failed Syncthing Log
node1	modified	file	sc-hdd	vol-044/wp-login.php	        2018-12-06 10:41:56
node2	modified	file	acl	sc-hdd/vol-044/wp-login.php	2018-12-06 10:41:56
node2	modified	file	acl	sc-hdd/vol-044/wp-login.php	2018-12-06 10:41:56
node2	modified	file	acl	sc-hdd/vol-044/wp-login.php	2018-12-06 10:41:56
node1	added	        file	acl	sc-hdd/vol-044/wp-login.sync-conflict-20181206-104156-ZXAZ2BO.php	2018-12-06 10:42:06
node1	modified	file	acl	sc-hdd/vol-044/wp-login.php	2018-12-06 10:42:06
  • CASE1: node1 acl debug
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044/wp-login.php
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: wp-login.php
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/.acls/sc-hdd/vol-044
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: <13>Dec  6 10:40:02 syncthing-acl: FILE Event : Create ACL: Change Event, No ACLFile No Change to RepFile : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=CREATE
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044/wp-login.php
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: wp-login.php
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/.acls/sc-hdd/vol-044
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: <13>Dec  6 10:40:02 syncthing-acl: FILE Event : Touch ACL: Change Event, ACLFile Identical to RepFile : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=MODIFY
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044/wp-login.php
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: wp-login.php
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/.acls/sc-hdd/vol-044
Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: <13>Dec  6 10:40:02 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB
  • CASE2: node1 acl debug
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec  6 10:40:12 syncthing-acl: FILE Event : Change File: Change Event, ACLFile Newer and Different : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=MOVED_TO
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044
Dez 06 10:40:12 node2 syncthing-acl[11547]: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec  6 10:40:12 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044
Dez 06 10:40:12 node2 syncthing-acl[11567]: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec  6 10:40:12 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB
  • CASE1: node2 acl debug
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec  6 10:40:12 syncthing-acl: FILE Event : Change File: Change Event, ACLFile Newer and Different : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=MOVED_TO
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044
Dez 06 10:40:12 node2 syncthing-acl[11547]: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec  6 10:40:12 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044
Dez 06 10:40:12 node2 syncthing-acl[11567]: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB
Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec  6 10:40:12 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB
  • CASE2: node2 acl debug
Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php
Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: wp-login.php
Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044
Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044
Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: <13>Dec  6 10:41:56 syncthing-acl: FILE Event : Create ACL: Change Event, No ACLFile No Change to RepFile : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=MOVED_TO
Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php
Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: wp-login.php
Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044
Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php
Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044
Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: <13>Dec  6 10:41:56 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB

Does this help?

Problem seems, that acl file is modifed at the very same time on both servers in CASE2.

adoerler avatar Dec 06 '18 09:12 adoerler

Hi Andreas,

Will get to this as soon as I can ;-) Sorry , somethings this morning to resolve.

Im not active on this code base, so if you want to join and help take over, then Id be very happy - I can add you as a moderator/owner

Thanks

On 06/12/2018 09:55, Andreas wrote:

Hi,

back again with hopefully interesting news:

Ultra simple test case with one file. CASE1 did succeed ending up having the files replicated as |www-data:www-data| to node2 CASE2 failed ending up in having the file |root:root| on both sides

This tests just run after each other. I delete the file, wait until everything is synced, than copy it into the sync folder and wait... I can replicated it. Sometimes it works, often not.

Let's compare the logs:

  • CASE1: Sucessful Syncthing Log

|node1 modified file sc-hdd vol-044/wp-login.php 2018-12-06 10:40:12 node1 modified file acl sc-hdd/vol-044/wp-login.php 2018-12-06 10:40:12 node2 modified file acl sc-hdd/vol-044/wp-login.php 2018-12-06 10:40:22 |

  • CASE1: Failed Syncthing Log

|node1 modified file sc-hdd vol-044/wp-login.php 2018-12-06 10:41:56 node2 modified file acl sc-hdd/vol-044/wp-login.php 2018-12-06 10:41:56 node2 modified file acl sc-hdd/vol-044/wp-login.php 2018-12-06 10:41:56 node2 modified file acl sc-hdd/vol-044/wp-login.php 2018-12-06 10:41:56 node1 added file acl sc-hdd/vol-044/wp-login.sync-conflict-20181206-104156-ZXAZ2BO.php 2018-12-06 10:42:06 node1 modified file acl sc-hdd/vol-044/wp-login.php 2018-12-06 10:42:06 |

  • CASE1: node1 acl debug

|Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044 Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: <13>Dec 6 10:40:02 syncthing-acl: FILE Event : Create ACL: Change Event, No ACLFile No Change to RepFile : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=CREATE Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044 Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: <13>Dec 6 10:40:02 syncthing-acl: FILE Event : Touch ACL: Change Event, ACLFile Identical to RepFile : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=MODIFY Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044 Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: <13>Dec 6 10:40:02 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB |

  • CASE2: node1 acl debug

|Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec 6 10:40:12 syncthing-acl: FILE Event : Change File: Change Event, ACLFile Newer and Different : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=MOVED_TO Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl[11547]: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec 6 10:40:12 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl[11567]: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec 6 10:40:12 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB |

  • CASE1: node2 acl debug

|Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec 6 10:40:12 syncthing-acl: FILE Event : Change File: Change Event, ACLFile Newer and Different : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=MOVED_TO Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl[11547]: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec 6 10:40:12 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl[11567]: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec 6 10:40:12 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB |

  • CASE2: node2 acl debug

|Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: wp-login.php Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044 Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: <13>Dec 6 10:41:56 syncthing-acl: FILE Event : Create ACL: Change Event, No ACLFile No Change to RepFile : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=MOVED_TO Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: wp-login.php Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044 Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: <13>Dec 6 10:41:56 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB |

Does this help?

Problem seems, that |acl| file is modifed at the very same time on both servers in CASE2.

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idistech avatar Dec 06 '18 10:12 idistech

Looks like it needs another 'jitter' race condition check.

My test and operational environments for this was always over a 100kms apart  and on 2 systems that werent the quickest ( single proc etc ).. and syncthing was always a little slow to detect and fire, this might be the issue...

Will try and get back when I can.

On 06/12/2018 09:55, Andreas wrote:

Hi,

back again with hopefully interesting news:

Ultra simple test case with one file. CASE1 did succeed ending up having the files replicated as |www-data:www-data| to node2 CASE2 failed ending up in having the file |root:root| on both sides

This tests just run after each other. I delete the file, wait until everything is synced, than copy it into the sync folder and wait... I can replicated it. Sometimes it works, often not.

Let's compare the logs:

  • CASE1: Sucessful Syncthing Log

|node1 modified file sc-hdd vol-044/wp-login.php 2018-12-06 10:40:12 node1 modified file acl sc-hdd/vol-044/wp-login.php 2018-12-06 10:40:12 node2 modified file acl sc-hdd/vol-044/wp-login.php 2018-12-06 10:40:22 |

  • CASE1: Failed Syncthing Log

|node1 modified file sc-hdd vol-044/wp-login.php 2018-12-06 10:41:56 node2 modified file acl sc-hdd/vol-044/wp-login.php 2018-12-06 10:41:56 node2 modified file acl sc-hdd/vol-044/wp-login.php 2018-12-06 10:41:56 node2 modified file acl sc-hdd/vol-044/wp-login.php 2018-12-06 10:41:56 node1 added file acl sc-hdd/vol-044/wp-login.sync-conflict-20181206-104156-ZXAZ2BO.php 2018-12-06 10:42:06 node1 modified file acl sc-hdd/vol-044/wp-login.php 2018-12-06 10:42:06 |

  • CASE1: node1 acl debug

|Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044 Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: <13>Dec 6 10:40:02 syncthing-acl: FILE Event : Create ACL: Change Event, No ACLFile No Change to RepFile : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=CREATE Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044 Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: <13>Dec 6 10:40:02 syncthing-acl: FILE Event : Touch ACL: Change Event, ACLFile Identical to RepFile : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=MODIFY Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: sc-hdd/vol-044 Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:02 node1 syncthing-acl.sh[4772]: <13>Dec 6 10:40:02 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB |

  • CASE2: node1 acl debug

|Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec 6 10:40:12 syncthing-acl: FILE Event : Change File: Change Event, ACLFile Newer and Different : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=MOVED_TO Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl[11547]: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec 6 10:40:12 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl[11567]: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec 6 10:40:12 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB |

  • CASE1: node2 acl debug

|Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec 6 10:40:12 syncthing-acl: FILE Event : Change File: Change Event, ACLFile Newer and Different : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=MOVED_TO Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl[11547]: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec 6 10:40:12 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:40:12 node2 syncthing-acl[11567]: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB Dez 06 10:40:12 node2 syncthing-acl.sh[17039]: <13>Dec 6 10:40:12 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB |

  • CASE2: node2 acl debug

|Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: wp-login.php Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044 Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: <13>Dec 6 10:41:56 syncthing-acl: FILE Event : Create ACL: Change Event, No ACLFile No Change to RepFile : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=MOVED_TO Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044/wp-login.php Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: wp-login.php Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: sc-hdd/vol-044 Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/sc-hdd/vol-044/wp-login.php Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: /pv/.acls/sc-hdd/vol-044 Dez 06 10:41:56 node2 syncthing-acl.sh[17039]: <13>Dec 6 10:41:56 syncthing-acl: FILE Event : Create/Modify ACLFile, ACL Has Changed : ACLFile=/pv/.acls/sc-hdd/vol-044/wp-login.php REPFile=/pv/sc-hdd/vol-044/wp-login.php Filename=/pv/sc-hdd/vol-044/wp-login.php Events=ATTRIB |

Does this help?

Problem seems, that |acl| file is modifed at the very same time on both servers in CASE2.

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idistech avatar Dec 06 '18 11:12 idistech