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[QFX] QFabric current and old configuration file location and procedure to modify symbolic links

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Article ID: KB23004 KB Last Updated: 18 May 2021Version: 5.0
Summary:

This article provides information about the location in which QFabric stores current and old configuration files. It also explains with the procedure to remove and update the symbolic links for the storage location.

Solution:

Junos stores the last 50 configurations in flash. Below are the storage locations in different Junos versions.

13.2X52-D25.4:

The last 49 configuration files are stored in DG (Director Group) in the following location:

/pbdata/mgd_shared/172.22.157.44/var/db/config

Here, 172.22.157.44 is the default QFabric partition IP address:

[root@dg0 config]# pwd
/pbdata/mgd_shared/172.22.157.44/var/db/config
 
[root@dg0 config]# ls
juniper.conf.10.gz juniper.conf.17.gz juniper.conf.23.gz juniper.conf.2.gz juniper.conf.36.gz juniper.conf.42.gz juniper.conf.49.gz
juniper.conf.11.gz juniper.conf.18.gz juniper.conf.24.gz juniper.conf.30.gz juniper.conf.37.gz juniper.conf.43.gz juniper.conf.4.gz
juniper.conf.12.gz juniper.conf.19.gz juniper.conf.25.gz juniper.conf.31.gz juniper.conf.38.gz juniper.conf.44.gz juniper.conf.5.gz
juniper.conf.13.gz juniper.conf.1.gz juniper.conf.26 juniper.conf.32.gz juniper.conf.39.gz juniper.conf.45.gz juniper.conf.6.gz
juniper.conf.14.gz juniper.conf.20.gz juniper.conf.27.gz juniper.conf.33.gz juniper.conf.3.gz juniper.conf.46.gz juniper.conf.7.gz
juniper.conf.15.gz juniper.conf.21.gz juniper.conf.28.gz juniper.conf.34.gz juniper.conf.40.gz juniper.conf.47.gz juniper.conf.8.gz
juniper.conf.16.gz juniper.conf.22.gz juniper.conf.29.gz juniper.conf.35.gz juniper.conf.41.gz juniper.conf.48.gz juniper.conf.9.gz

The current configuration is stored in the following path:

[root@dg0 1]# pwd
/pbdata/mgd_shared/repository/1
[root@dg0 1]# ls -l
total 360
-rw------- 1 root root 16923 Feb 16 01:40 juniper.conf.63
-rw------- 1 root root 16933 Feb 16 01:43 juniper.conf.64
-rw------- 1 root root 2621440 Feb 16 01:40 juniper.save.63
-rw------- 1 root root 2621440 Feb 16 01:43 juniper.save.64

Here, .64 is the current active configuration and .63 is the last active configuration; these values represent internal revision numbers. When each commit is complete, the current configuration becomes the last active configuration and a new file will be created for the current configuration.

For example, a change is made and after the commit, .64 becomes the last active configuration, which was earlier the active configuration. A new file has been created with revision .65 for the current active configuration:

root@qfabric1# delete vlans test
root@qfabric1# commit
commit complete
 
[root@dg1 1]# ls -l
total 232
-rw------- 1 root root 8444 Jan 15 11:59 juniper.conf.64
-rw------- 1 root root 8481 Jan 15 12:02 juniper.conf.65
-rw------- 1 root root 2621440 Jan 15 11:59 juniper.save.64
-rw------- 1 root root 2621440 Jan 15 12:02 juniper.save.65

Symbolic link:

[root@dg1 /]# pwd
/
 
[root@dg1 /]# ls -lh | grep config
lrwxrwxrwx   1 root root    38 Dec  9  2015 config -> /pbdata/mgd_shared/172.22.157.44 /config
 

14.1X53-D42.3 / 14.1X53-D121.4 / 14.1X53-D122.8 / 14.1X53-D140.13

In newer code 14.1X53-D42.3, it points to a different location. The last 49 configuration files are stored in DG (Director Group) at the following location:

[root@dg1 ~]# cd /pbdata/mgd_shared/1/var/db/config
 
[root@dg1 config]# ls
 
juniper.conf.10.gz  juniper.conf.17.gz  juniper.conf.23.gz  juniper.conf.2.gz   juniper.conf.36.gz  juniper.conf.42.gz  juniper.conf.49.gz
juniper.conf.11.gz  juniper.conf.18.gz  juniper.conf.24.gz  juniper.conf.30.gz  juniper.conf.37.gz  juniper.conf.43.gz  juniper.conf.4.gz
juniper.conf.12.gz  juniper.conf.19.gz  juniper.conf.25.gz  juniper.conf.31.gz  juniper.conf.38.gz  juniper.conf.44.gz  juniper.conf.5.gz
juniper.conf.13.gz  juniper.conf.1.gz   juniper.conf.26.gz  juniper.conf.32.gz  juniper.conf.39.gz  juniper.conf.45.gz  juniper.conf.6.gz
juniper.conf.14.gz  juniper.conf.20.gz  juniper.conf.27.gz  juniper.conf.33.gz  juniper.conf.3.gz   juniper.conf.46.gz  juniper.conf.7.gz
juniper.conf.15.gz  juniper.conf.21.gz  juniper.conf.28.gz  juniper.conf.34.gz  juniper.conf.40.gz  juniper.conf.47.gz  juniper.conf.8.gz
juniper.conf.16.gz  juniper.conf.22.gz  juniper.conf.29.gz  juniper.conf.35.gz  juniper.conf.41.gz  juniper.conf.48.gz  juniper.conf.9.gz
 

The current configuration is stored in the following path:

[root@dg1 ~]# cd /pbdata/mgd_shared/repository/1
 
[root@dg1 1]# pwd
/pbdata/mgd_shared/repository/1
 
[root@dg1 1]# ls
hostname  juniper.conf.51  juniper.conf.52  juniper.save.51  juniper.save.52
 
Symbolic link:
 
[root@dg1 /]# pwd
/
 
[root@dg1 /]# ls -lh | grep config
lrwxrwxrwx   1 root root   27 Apr 18 12:01 config -> /pbdata/mgd_shared/1/config

In some rare cases, symbolic link may not be updated and will return the error below. In this scenario, you'll be required to update the symbolic link on both the DGs.

root@qfabric# commit confirmed 2 
error: commit confirmed failed during copy of rollback data
error: if [system compress-configuration-files] has changed, commit that change alone
commit complete
 
root@Qfabric-M> show version    
Hostname: Qfabric-M
Model: qfx3000-m
Serial Number: qfab100000
QFabric System ID: 814aa864-42ff-11e8-ad22-00e081cbcbfc
JUNOS Base Version [14.1X53-D121.4]
 
[root@dg1 config]# pwd
/pbdata/mgd_shared/1/var/db/config
juniper.conf.10.gz  juniper.conf.17.gz  juniper.conf.23.gz  juniper.conf.2.gz   juniper.conf.36.gz  juniper.conf.42.gz  juniper.conf.49.gz
juniper.conf.11.gz  juniper.conf.18.gz  juniper.conf.24.gz  juniper.conf.30.gz  juniper.conf.37.gz  juniper.conf.43.gz  juniper.conf.4.gz
juniper.conf.12.gz  juniper.conf.19.gz  juniper.conf.25.gz  juniper.conf.31.gz  juniper.conf.38.gz  juniper.conf.44.gz  juniper.conf.5.gz
juniper.conf.13.gz  juniper.conf.1.gz   juniper.conf.26.gz  juniper.conf.32.gz  juniper.conf.39.gz  juniper.conf.45.gz  juniper.conf.6.gz
juniper.conf.14.gz  juniper.conf.20.gz  juniper.conf.27.gz  juniper.conf.33.gz  juniper.conf.3.gz   juniper.conf.46.gz  juniper.conf.7.gz
juniper.conf.15.gz  juniper.conf.21.gz  juniper.conf.28.gz  juniper.conf.34.gz  juniper.conf.40.gz  juniper.conf.47.gz  juniper.conf.8.gz
juniper.conf.16.gz  juniper.conf.22.gz  juniper.conf.29.gz  juniper.conf.35.gz  juniper.conf.41.gz  juniper.conf.48.gz  juniper.conf.9.gz
 
 
Jul  5 11:25:22 <19.5> dg1 qfd_mgd[13503]: UI_MYSQL_PUT_ASCII_CONFIG: Reading current ascii configuration from /opt/demo/mgdhive/1/config/juniper.conf for partition 1
Jul  5 11:25:22 <19.5> dg1 qfd_mgd[13503]: UI_MYSQL_UPDATE_BINARY_CONFIG: Binary configuration update succeeded for partition 1, new revision is: 53
Jul  5 11:25:22 <19.5> dg1 qfd_mgd[13503]: UI_MYSQL_UPDATE_ASCII_CONFIG: Ascii configuration update succeeded for partition 1, new revision is: 53
 
 
[root@dg1 1]# pwd
/pbdata/mgd_shared/repository/1
 
[root@dg1 1]# ls
hostname  juniper.conf.51  juniper.conf.52  juniper.save.51  juniper.save.52
 
2018-07-05 11:25:15 ICT: copying configuration to juniper.save
2018-07-05 11:25:15 ICT: activating '/opt/demo/mgdhive/1/var/run/db/juniper.data'
2018-07-05 11:25:20 ICT: notifying daemons of new configuration
error: commit confirmed failed during copy of rollback data
error: if [system compress-configuration-files] has changed, commit that change alone
2018-07-05 11:25:20 ICT: Rotate backup configs
2018-07-05 11:25:22 ICT: notifying all secondary 
 
 
lrwxrwxrwx   1 root root    38 Dec  9  2015 config -> /pbdata/mgd_shared/010.49.201.1/config      <<<--- old location
 
Procedure to remove and update the symbolic link:

DG1:
 
[root@dg1 var]# rm /config 
rm: remove symbolic link `/config'? y
 
[root@dg1 var]# ln -s /pbdata/mgd_shared/1/config/ /config
 
[root@dg1 var]# ls -la /config
lrwxrwxrwx 1 root root 28 Jul  5 12:10 /config -> /pbdata/mgd_shared/1/config/ <-- new location
 
[root@dg1 var]# pwd
/opt/demo/mgdhive/1/var
 
[root@dg1 var]# 
 
DG0:
 
[root@dg0 ~]# cd /pbdata/mgd_shared/1/config
 
[root@dg0 config]# ls -lh /config 
lrwxrwxrwx 1 root root 37 Dec  9  2015 /config -> /pbdata/mgd_shared/10.49.201.1/config <-- old location
 
[root@dg0 config]# rm /config 
rm: remove symbolic link `/config'? y
 
[root@dg0 config]# ln -s /pbdata/mgd_shared/1/config/ /config
 
[root@dg0 config]# ls -la /config
lrwxrwxrwx 1 root root 28 Jul  5 12:13 /config -> /pbdata/mgd_shared/1/config/ <-- new location
 
[root@dg0 config]# pwd
/pbdata/mgd_shared/1/config
 
[root@dg0 config]#

 

Modification History:

2018-08-22: Updated the path and the symbolic link for older and newer codes.
2021-04-21: Minor edits. Article is correct and complete for the latest Junos codes - 14.1X53-D122.8 / 14.1X53-D140.13.

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