Custom Grafana configuration lost after upgrade to 13.0

Summary

All custom Grafana configuration (connectors, dashboards) is lost after updating GitLab to 13.0

Steps to reproduce

• Have a valid /var/opt/gitlab/grafana directory containing several custom dashboards in data/grafana.db using the GitLab Docker container on Gitlab 13.0.0.
• Restart the container (executing a gitlab-ctl reconfigure)
• Grafana now creates data.bak.DATESTAMP and creates an empty data directory containing a clean installation

Example Project

N/A

What is the current bug behavior?

Grafana creates a clean install

What is the expected correct behavior?

Grafana keeps my previous configuration

Relevant logs and/or screenshots

I haven't found relevant logs. I have tried restoring the data.bak that was created as a new data directory and restarting the container, but the same thing happened again (and a new data.bak.DATESTAMP directory was created)

Output of checks

N/A

Results of GitLab environment info

Expand for output related to GitLab environment info

System information
System:
Current User:   git
Using RVM:      no
Ruby Version:   2.6.6p146
Gem Version:    2.7.10
Bundler Version:1.17.3
Rake Version:   12.3.3
Redis Version:  5.0.9
Git Version:    2.26.2
Sidekiq Version:5.2.7
Go Version:     unknown

GitLab information
Version:        13.0.0
Revision:       6743e883eae
Directory:      /opt/gitlab/embedded/service/gitlab-rails
DB Adapter:     PostgreSQL
DB Version:     11.7
URL:            https://REDACTED
HTTP Clone URL: https://REDACTED/some-group/some-project.git
SSH Clone URL:  git@REDACTED:some-group/some-project.git
Using LDAP:     no
Using Omniauth: yes
Omniauth Providers: google_oauth2

GitLab Shell
Version:        13.2.0
Repository storage paths:
- default:      /var/opt/gitlab/git-data/repositories
GitLab Shell path:              /opt/gitlab/embedded/service/gitlab-shell
Git:            /opt/gitlab/embedded/bin/git

Results of GitLab application Check

Expand for output related to the GitLab application check

Checking GitLab subtasks ...
Checking GitLab Shell ...
GitLab Shell: ... GitLab Shell version >= 13.2.0 ? ... OK (13.2.0)
Running /opt/gitlab/embedded/service/gitlab-shell/bin/check
Internal API available: OK
Redis available via internal API: OK
gitlab-shell self-check successful
Checking GitLab Shell ... Finished
Checking Gitaly ...
Gitaly: ... default ... OK
Checking Gitaly ... Finished
Checking Sidekiq ...
Sidekiq: ... Running? ... yes
Number of Sidekiq processes ... 1
Checking Sidekiq ... Finished
Checking Incoming Email ...
Incoming Email: ... Checking Reply by email ...
IMAP server credentials are correct? ... yes
Init.d configured correctly? ... skipped
MailRoom running? ... skipped
Checking Reply by email ... Finished
Checking Incoming Email ... Finished
Checking LDAP ...
LDAP: ... LDAP is disabled in config/gitlab.yml
Checking LDAP ... Finished
Checking GitLab App ...
Git configured correctly? ... yes
Database config exists? ... yes
All migrations up? ... yes
Database contains orphaned GroupMembers? ... no
GitLab config exists? ... yes
GitLab config up to date? ... yes
Log directory writable? ... yes
Tmp directory writable? ... yes
Uploads directory exists? ... yes
Uploads directory has correct permissions? ... yes
Uploads directory tmp has correct permissions? ... yes
Init script exists? ... skipped (omnibus-gitlab has no init script)
Init script up-to-date? ... skipped (omnibus-gitlab has no init script)
Projects have namespace: ...
3/1 ... yes
2/2 ... yes
3/3 ... yes
3/4 ... yes
2/5 ... yes
2/6 ... yes
3/7 ... yes
3/8 ... yes
3/9 ... yes
3/12 ... yes
3/13 ... yes
3/14 ... yes
3/15 ... yes
3/16 ... yes
3/17 ... yes
2/18 ... yes
2/19 ... yes
2/20 ... yes
2/21 ... yes
3/22 ... yes
3/23 ... yes
2/24 ... yes
8/25 ... yes
2/26 ... yes
9/27 ... yes
9/28 ... yes
9/29 ... yes
1/30 ... yes
3/32 ... yes
4/33 ... yes
4/34 ... yes
2/35 ... yes
2/36 ... yes
3/41 ... yes
3/42 ... yes
12/46 ... yes
3/47 ... yes
5/48 ... yes
2/49 ... yes
2/50 ... yes
16/51 ... yes
17/52 ... yes
16/53 ... yes
16/55 ... yes
31/56 ... yes
31/57 ... yes
12/58 ... yes
16/59 ... yes
22/60 ... yes
22/61 ... yes
7/62 ... yes
3/63 ... yes
3/64 ... yes
3/65 ... yes
24/66 ... yes
25/67 ... yes
25/69 ... yes
7/70 ... yes
1/71 ... yes
24/72 ... yes
5/74 ... yes
20/75 ... yes
3/77 ... yes
3/79 ... yes
24/80 ... yes
2/81 ... yes
3/82 ... yes
16/83 ... yes
16/84 ... yes
20/85 ... yes
3/86 ... yes
19/87 ... yes
16/88 ... yes
3/89 ... yes
3/90 ... yes
3/91 ... yes
27/92 ... yes
27/93 ... yes
3/94 ... yes
24/95 ... yes
27/96 ... yes
27/97 ... yes
3/99 ... yes
9/101 ... yes
1/102 ... yes
24/103 ... yes
3/104 ... yes
29/105 ... yes
8/106 ... yes
24/107 ... yes
24/108 ... yes
32/109 ... yes
16/111 ... yes
24/112 ... yes
20/113 ... yes
20/114 ... yes
5/115 ... yes
3/118 ... yes
3/119 ... yes
3/120 ... yes
3/121 ... yes
31/122 ... yes
32/123 ... yes
3/124 ... yes
2/125 ... yes
6/126 ... yes
29/128 ... yes
24/129 ... yes
3/130 ... yes
6/131 ... yes
3/132 ... yes
3/133 ... yes
3/134 ... yes
16/135 ... yes
37/137 ... yes
37/138 ... yes
3/140 ... yes
16/142 ... yes
24/143 ... yes
27/144 ... yes
24/145 ... yes
3/146 ... yes
16/147 ... yes
16/148 ... yes
5/150 ... yes
16/151 ... yes
8/152 ... yes
29/153 ... yes
3/154 ... yes
3/156 ... yes
2/157 ... yes
3/158 ... yes
16/159 ... yes
16/160 ... yes
43/161 ... yes
1/162 ... yes
1/163 ... yes
24/164 ... yes
3/167 ... yes
Redis version >= 4.0.0? ... yes
Ruby version >= 2.5.3 ? ... yes (2.6.6)
Git version >= 2.22.0 ? ... yes (2.26.2)
Git user has default SSH configuration? ... yes
Active users: ... REDACTED
Is authorized keys file accessible? ... yes
GitLab configured to store new projects in hashed storage? ... yes
All projects are in hashed storage? ... no
Try fixing it:
Please migrate all projects to hashed storage
as legacy storage is deprecated in 13.0 and support will be removed in 14.0.
For more information see:
doc/administration/repository_storage_types.md
Checking GitLab App ... Finished
Checking GitLab subtasks ... Finished

Possible fixes

N/A