Sentence language seemed to contradict the section header, so it's been clarified to prevent any confusion. Also added information about how wikis are handled during a backup. Originally submitted at https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/6673. Signed-off-by: Rémy Coutable <remy@rymai.me>
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Backing up and restoring GitLab
An application data backup creates an archive file that contains the database, all repositories and all attachments.
You can only restore a backup to exactly the same version and type (CE/EE) of GitLab on which it was created. The best way to migrate your repositories from one server to another is through backup restore.
Backup
GitLab provides a simple command line interface to backup your whole installation, and is flexible enough to fit your needs.
Requirements
If you're using GitLab with the Omnibus package, you're all set. If you installed GitLab from source, make sure the following packages are installed:
- rsync
If you're using Ubuntu, you could run:
sudo apt-get install -y rsync
Backup timestamp
Note: In GitLab 9.2 the timestamp format was changed from
EPOCH_YYYY_MM_DD
toEPOCH_YYYY_MM_DD_GitLab_version
, for example1493107454_2018_04_25
would become1493107454_2018_04_25_10.6.4-ce
.
The backup archive will be saved in backup_path
, which is specified in the
config/gitlab.yml
file.
The filename will be [TIMESTAMP]_gitlab_backup.tar
, where TIMESTAMP
identifies the time at which each backup was created, plus the GitLab version.
The timestamp is needed if you need to restore GitLab and multiple backups are
available.
For example, if the backup name is 1493107454_2018_04_25_10.6.4-ce_gitlab_backup.tar
,
then the timestamp is 1493107454_2018_04_25_10.6.4-ce
.
Creating a backup of the GitLab system
Use this command if you've installed GitLab with the Omnibus package:
sudo gitlab-rake gitlab:backup:create
Use this if you've installed GitLab from source:
sudo -u git -H bundle exec rake gitlab:backup:create RAILS_ENV=production
If you are running GitLab within a Docker container, you can run the backup from the host:
docker exec -t <container name> gitlab-rake gitlab:backup:create
If you are using the gitlab-omnibus helm chart on a Kubernetes cluster, you can run the backup task on the gitlab application pod using kubectl
kubectl exec -it <gitlab-gitlab pod> gitlab-rake gitlab:backup:create
Example output:
Dumping database tables:
- Dumping table events... [DONE]
- Dumping table issues... [DONE]
- Dumping table keys... [DONE]
- Dumping table merge_requests... [DONE]
- Dumping table milestones... [DONE]
- Dumping table namespaces... [DONE]
- Dumping table notes... [DONE]
- Dumping table projects... [DONE]
- Dumping table protected_branches... [DONE]
- Dumping table schema_migrations... [DONE]
- Dumping table services... [DONE]
- Dumping table snippets... [DONE]
- Dumping table taggings... [DONE]
- Dumping table tags... [DONE]
- Dumping table users... [DONE]
- Dumping table users_projects... [DONE]
- Dumping table web_hooks... [DONE]
- Dumping table wikis... [DONE]
Dumping repositories:
- Dumping repository abcd... [DONE]
Creating backup archive: $TIMESTAMP_gitlab_backup.tar [DONE]
Deleting tmp directories...[DONE]
Deleting old backups... [SKIPPING]
Backup strategy option
Note: Introduced as an option in GitLab 8.17.
The default backup strategy is to essentially stream data from the respective
data locations to the backup using the Linux command tar
and gzip
. This works
fine in most cases, but can cause problems when data is rapidly changing.
When data changes while tar
is reading it, the error file changed as we read it
may occur, and will cause the backup process to fail. To combat this, 8.17
introduces a new backup strategy called copy
. The strategy copies data files
to a temporary location before calling tar
and gzip
, avoiding the error.
A side-effect is that the backup process with take up to an additional 1X disk
space. The process does its best to clean up the temporary files at each stage
so the problem doesn't compound, but it could be a considerable change for large
installations. This is why the copy
strategy is not the default in 8.17.
To use the copy
strategy instead of the default streaming strategy, specify
STRATEGY=copy
in the Rake task command. For example,
sudo gitlab-rake gitlab:backup:create STRATEGY=copy
.
Excluding specific directories from the backup
You can choose what should be exempt from the backup up by adding the environment variable SKIP
.
The available options are:
db
(database)uploads
(attachments)repositories
(Git repositories data)builds
(CI job output logs)artifacts
(CI job artifacts)lfs
(LFS objects)registry
(Container Registry images)pages
(Pages content)
Use a comma to specify several options at the same time:
All wikis will be backed up as part of the repositories
group. Non-existent wikis
will be skipped during a backup.
# use this command if you've installed GitLab with the Omnibus package
sudo gitlab-rake gitlab:backup:create SKIP=db,uploads
# if you've installed GitLab from source
sudo -u git -H bundle exec rake gitlab:backup:create SKIP=db,uploads RAILS_ENV=production
Uploading backups to a remote (cloud) storage
Starting with GitLab 7.4 you can let the backup script upload the '.tar' file it creates. It uses the Fog library to perform the upload. In the example below we use Amazon S3 for storage, but Fog also lets you use other storage providers. GitLab imports cloud drivers for AWS, Google, OpenStack Swift, Rackspace and Aliyun as well. A local driver is also available.
Using Amazon S3
For Omnibus GitLab packages:
-
Add the following to
/etc/gitlab/gitlab.rb
:gitlab_rails['backup_upload_connection'] = { 'provider' => 'AWS', 'region' => 'eu-west-1', 'aws_access_key_id' => 'AKIAKIAKI', 'aws_secret_access_key' => 'secret123' # If using an IAM Profile, don't configure aws_access_key_id & aws_secret_access_key # 'use_iam_profile' => true } gitlab_rails['backup_upload_remote_directory'] = 'my.s3.bucket'
-
Reconfigure GitLab for the changes to take effect
Digital Ocean Spaces
This example can be used for a bucket in Amsterdam (AMS3).
-
Add the following to
/etc/gitlab/gitlab.rb
:gitlab_rails['backup_upload_connection'] = { 'provider' => 'AWS', 'region' => 'ams3', 'aws_access_key_id' => 'AKIAKIAKI', 'aws_secret_access_key' => 'secret123', 'endpoint' => 'https://ams3.digitaloceanspaces.com' } gitlab_rails['backup_upload_remote_directory'] = 'my.s3.bucket'
-
Reconfigure GitLab for the changes to take effect
CAUTION: Warning:
If you see 400 Bad Request
by using Digital Ocean Spaces, the cause may be the
usage of backup encryption. Remove or comment the line that
contains gitlab_rails['backup_encryption']
since Digital Ocean Spaces
doesn't support encryption.
Other S3 Providers
Not all S3 providers are fully-compatible with the Fog library. For example,
if you see 411 Length Required
errors after attempting to upload, you may
need to downgrade the aws_signature_version
value from the default value to
2 due to this issue.
For installations from source:
-
Edit
home/git/gitlab/config/gitlab.yml
:backup: # snip upload: # Fog storage connection settings, see http://fog.io/storage/ . connection: provider: AWS region: eu-west-1 aws_access_key_id: AKIAKIAKI aws_secret_access_key: 'secret123' # If using an IAM Profile, leave aws_access_key_id & aws_secret_access_key empty # ie. aws_access_key_id: '' # use_iam_profile: 'true' # The remote 'directory' to store your backups. For S3, this would be the bucket name. remote_directory: 'my.s3.bucket' # Turns on AWS Server-Side Encryption with Amazon S3-Managed Keys for backups, this is optional # encryption: 'AES256' # Specifies Amazon S3 storage class to use for backups, this is optional # storage_class: 'STANDARD'
-
Restart GitLab for the changes to take effect
If you are uploading your backups to S3 you will probably want to create a new
IAM user with restricted access rights. To give the upload user access only for
uploading backups create the following IAM profile, replacing my.s3.bucket
with the name of your bucket:
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "Stmt1412062044000",
"Effect": "Allow",
"Action": [
"s3:AbortMultipartUpload",
"s3:GetBucketAcl",
"s3:GetBucketLocation",
"s3:GetObject",
"s3:GetObjectAcl",
"s3:ListBucketMultipartUploads",
"s3:PutObject",
"s3:PutObjectAcl"
],
"Resource": [
"arn:aws:s3:::my.s3.bucket/*"
]
},
{
"Sid": "Stmt1412062097000",
"Effect": "Allow",
"Action": [
"s3:GetBucketLocation",
"s3:ListAllMyBuckets"
],
"Resource": [
"*"
]
},
{
"Sid": "Stmt1412062128000",
"Effect": "Allow",
"Action": [
"s3:ListBucket"
],
"Resource": [
"arn:aws:s3:::my.s3.bucket"
]
}
]
}
Using Google Cloud Storage
If you want to use Google Cloud Storage to save backups, you'll have to create an access key from the Google console first:
- Go to the storage settings page https://console.cloud.google.com/storage/settings
- Select "Interoperability" and create an access key
- Make note of the "Access Key" and "Secret" and replace them in the configurations below
- Make sure you already have a bucket created
For Omnibus GitLab packages:
-
Edit
/etc/gitlab/gitlab.rb
:gitlab_rails['backup_upload_connection'] = { 'provider' => 'Google', 'google_storage_access_key_id' => 'Access Key', 'google_storage_secret_access_key' => 'Secret' } gitlab_rails['backup_upload_remote_directory'] = 'my.google.bucket'
-
Reconfigure GitLab for the changes to take effect
For installations from source:
-
Edit
home/git/gitlab/config/gitlab.yml
:backup: upload: connection: provider: 'Google' google_storage_access_key_id: 'Access Key' google_storage_secret_access_key: 'Secret' remote_directory: 'my.google.bucket'
-
Restart GitLab for the changes to take effect
Specifying a custom directory for backups
Note: This option only works for remote storage. If you want to group your backups
you can pass a DIRECTORY
environment variable:
sudo gitlab-rake gitlab:backup:create DIRECTORY=daily
sudo gitlab-rake gitlab:backup:create DIRECTORY=weekly
Uploading to locally mounted shares
You may also send backups to a mounted share (NFS
/ CIFS
/ SMB
/ etc.) by
using the Fog Local
storage provider.
The directory pointed to by the local_root
key must be owned by the git
user when mounted (mounting with the uid=
of the git
user for CIFS
and
SMB
) or the user that you are executing the backup tasks under (for omnibus
packages, this is the git
user).
The backup_upload_remote_directory
must be set in addition to the
local_root
key. This is the sub directory inside the mounted directory that
backups will be copied to, and will be created if it does not exist. If the
directory that you want to copy the tarballs to is the root of your mounted
directory, just use .
instead.
For omnibus packages:
gitlab_rails['backup_upload_connection'] = {
:provider => 'Local',
:local_root => '/mnt/backups'
}
# The directory inside the mounted folder to copy backups to
# Use '.' to store them in the root directory
gitlab_rails['backup_upload_remote_directory'] = 'gitlab_backups'
For installations from source:
backup:
# snip
upload:
# Fog storage connection settings, see http://fog.io/storage/ .
connection:
provider: Local
local_root: '/mnt/backups'
# The directory inside the mounted folder to copy backups to
# Use '.' to store them in the root directory
remote_directory: 'gitlab_backups'
Backup archive permissions
The backup archives created by GitLab (1393513186_2014_02_27_gitlab_backup.tar
)
will have owner/group git:git and 0600 permissions by default.
This is meant to avoid other system users reading GitLab's data.
If you need the backup archives to have different permissions you can use the 'archive_permissions' setting.
# In /etc/gitlab/gitlab.rb, for omnibus packages
gitlab_rails['backup_archive_permissions'] = 0644 # Makes the backup archives world-readable
# In gitlab.yml, for installations from source:
backup:
archive_permissions: 0644 # Makes the backup archives world-readable
Storing configuration files
Please be informed that a backup does not store your configuration files. One reason for this is that your database contains encrypted information for two-factor authentication. Storing encrypted information along with its key in the same place defeats the purpose of using encryption in the first place!
If you use an Omnibus package please see the instructions in the readme to backup your configuration.
If you have a cookbook installation there should be a copy of your configuration in Chef.
If you installed from source, please consider backing up your config/secrets.yml
file, gitlab.yml
file, any SSL keys and certificates, and your SSH host keys.
At the very minimum you should backup /etc/gitlab/gitlab.rb
and
/etc/gitlab/gitlab-secrets.json
(Omnibus), or
/home/git/gitlab/config/secrets.yml
(source) to preserve your database
encryption key.
Configuring cron to make daily backups
Note: The following cron jobs do not backup your GitLab configuration files or SSH host keys.
For Omnibus installations
To schedule a cron job that backs up your repositories and GitLab metadata, use the root user:
sudo su -
crontab -e
There, add the following line to schedule the backup for everyday at 2 AM:
0 2 * * * /opt/gitlab/bin/gitlab-rake gitlab:backup:create CRON=1
You may also want to set a limited lifetime for backups to prevent regular
backups using all your disk space. To do this add the following lines to
/etc/gitlab/gitlab.rb
and reconfigure:
# limit backup lifetime to 7 days - 604800 seconds
gitlab_rails['backup_keep_time'] = 604800
Note that the backup_keep_time
configuration option only manages local
files. GitLab does not automatically prune old files stored in a third-party
object storage (e.g., AWS S3) because the user may not have permission to list
and delete files. We recommend that you configure the appropriate retention
policy for your object storage. For example, you can configure the S3 backup
policy as described here.
For installation from source
cd /home/git/gitlab
sudo -u git -H editor config/gitlab.yml # Enable keep_time in the backup section to automatically delete old backups
sudo -u git crontab -e # Edit the crontab for the git user
Add the following lines at the bottom:
# Create a full backup of the GitLab repositories and SQL database every day at 4am
0 4 * * * cd /home/git/gitlab && PATH=/usr/local/bin:/usr/bin:/bin bundle exec rake gitlab:backup:create RAILS_ENV=production CRON=1
The CRON=1
environment setting tells the backup script to suppress all progress output if there are no errors.
This is recommended to reduce cron spam.
Restore
GitLab provides a simple command line interface to restore your whole installation, and is flexible enough to fit your needs.
The restore prerequisites section includes crucial information. Make sure to read and test the whole restore process at least once before attempting to perform it in a production environment.
You can only restore a backup to exactly the same version and type (CE/EE) of GitLab that you created it on, for example CE 9.1.0.
Restore prerequisites
You need to have a working GitLab installation before you can perform a restore. This is mainly because the system user performing the restore actions ('git') is usually not allowed to create or delete the SQL database it needs to import data into ('gitlabhq_production'). All existing data will be either erased (SQL) or moved to a separate directory (repositories, uploads).
To restore a backup, you will also need to restore /etc/gitlab/gitlab-secrets.json
(for Omnibus packages) or /home/git/gitlab/.secret
(for installations
from source). This file contains the database encryption key,
CI/CD variables, and
variables used for two-factor authentication.
If you fail to restore this encryption key file along with the application data
backup, users with two-factor authentication enabled and GitLab Runners will
lose access to your GitLab server.
Depending on your case, you might want to run the restore command with one or more of the following options:
BACKUP=timestamp_of_backup
- Required if more than one backup exists. Read what the backup timestamp is about.force=yes
- Does not ask if the authorized_keys file should get regenerated and assumes 'yes' for warning that database tables will be removed.
If you are restoring into directories that are mountpoints you will need to make sure these directories are empty before attempting a restore. Otherwise GitLab will attempt to move these directories before restoring the new data and this would cause an error.
Read more on configuring NFS mounts
Restore for installation from source
# Stop processes that are connected to the database
sudo service gitlab stop
bundle exec rake gitlab:backup:restore RAILS_ENV=production
Example output:
Unpacking backup... [DONE]
Restoring database tables:
-- create_table("events", {:force=>true})
-> 0.2231s
[...]
- Loading fixture events...[DONE]
- Loading fixture issues...[DONE]
- Loading fixture keys...[SKIPPING]
- Loading fixture merge_requests...[DONE]
- Loading fixture milestones...[DONE]
- Loading fixture namespaces...[DONE]
- Loading fixture notes...[DONE]
- Loading fixture projects...[DONE]
- Loading fixture protected_branches...[SKIPPING]
- Loading fixture schema_migrations...[DONE]
- Loading fixture services...[SKIPPING]
- Loading fixture snippets...[SKIPPING]
- Loading fixture taggings...[SKIPPING]
- Loading fixture tags...[SKIPPING]
- Loading fixture users...[DONE]
- Loading fixture users_projects...[DONE]
- Loading fixture web_hooks...[SKIPPING]
- Loading fixture wikis...[SKIPPING]
Restoring repositories:
- Restoring repository abcd... [DONE]
Deleting tmp directories...[DONE]
Next, restore /home/git/gitlab/.secret
if necessary as mentioned above.
Restart GitLab:
sudo service gitlab restart
Restore for Omnibus installations
This procedure assumes that:
- You have installed the exact same version and type (CE/EE) of GitLab Omnibus with which the backup was created.
- You have run
sudo gitlab-ctl reconfigure
at least once. - GitLab is running. If not, start it using
sudo gitlab-ctl start
.
First make sure your backup tar file is in the backup directory described in the
gitlab.rb
configuration gitlab_rails['backup_path']
. The default is
/var/opt/gitlab/backups
.
sudo cp 11493107454_2018_04_25_10.6.4-ce_gitlab_backup.tar /var/opt/gitlab/backups/
Stop the processes that are connected to the database. Leave the rest of GitLab running:
sudo gitlab-ctl stop unicorn
sudo gitlab-ctl stop sidekiq
# Verify
sudo gitlab-ctl status
Next, restore the backup, specifying the timestamp of the backup you wish to restore:
# This command will overwrite the contents of your GitLab database!
sudo gitlab-rake gitlab:backup:restore BACKUP=1493107454_2018_04_25_10.6.4-ce
Next, restore /etc/gitlab/gitlab-secrets.json
if necessary as mentioned above.
Restart and check GitLab:
sudo gitlab-ctl restart
sudo gitlab-rake gitlab:check SANITIZE=true
If there is a GitLab version mismatch between your backup tar file and the installed version of GitLab, the restore command will abort with an error. Install the correct GitLab version and try again.
Restore for Docker image and gitlab-omnibus helm chart
For GitLab installations using docker image or the gitlab-omnibus helm chart on
a Kubernetes cluster, restore task expects the restore directories to be empty.
However, with docker and Kubernetes volume mounts, some system level directories
may be created at the volume roots, like lost+found
directory found in Linux
operating systems. These directories are usually owned by root
, which can
cause access permission errors since the restore rake task runs as git
user.
So, to restore a GitLab installation, users have to confirm the restore target
directories are empty.
For both these installation types, the backup tarball has to be available in the
backup location (default location is /var/opt/gitlab/backups
).
For docker installations, the restore task can be run from host using the command
docker exec -it <name of container> gitlab-rake gitlab:backup:restore
Similarly, for gitlab-omnibus helm chart, the restore task can be run on the gitlab application pod using kubectl
kubectl exec -it <gitlab-gitlab pod> gitlab-rake gitlab:backup:restore
Alternative backup strategies
If your GitLab server contains a lot of Git repository data you may find the GitLab backup script to be too slow. In this case you can consider using filesystem snapshots as part of your backup strategy.
Example: Amazon EBS
A GitLab server using omnibus-gitlab hosted on Amazon AWS. An EBS drive containing an ext4 filesystem is mounted at
/var/opt/gitlab
. In this case you could make an application backup by taking an EBS snapshot. The backup includes all repositories, uploads and Postgres data.
Example: LVM snapshots + rsync
A GitLab server using omnibus-gitlab, with an LVM logical volume mounted at
/var/opt/gitlab
. Replicating the/var/opt/gitlab
directory using rsync would not be reliable because too many files would change while rsync is running. Instead of rsync-ing/var/opt/gitlab
, we create a temporary LVM snapshot, which we mount as a read-only filesystem at/mnt/gitlab_backup
. Now we can have a longer running rsync job which will create a consistent replica on the remote server. The replica includes all repositories, uploads and Postgres data.
If you are running GitLab on a virtualized server you can possibly also create VM snapshots of the entire GitLab server. It is not uncommon however for a VM snapshot to require you to power down the server, so this approach is probably of limited practical use.
Additional notes
This documentation is for GitLab Community and Enterprise Edition. We backup GitLab.com and make sure your data is secure, but you can't use these methods to export / backup your data yourself from GitLab.com.
Issues are stored in the database. They can't be stored in Git itself.
To migrate your repositories from one server to another with an up-to-date version of GitLab, you can use the import rake task to do a mass import of the repository. Note that if you do an import rake task, rather than a backup restore, you will have all your repositories, but not any other data.
Troubleshooting
Restoring database backup using omnibus packages outputs warnings
If you are using backup restore procedures you might encounter the following warnings:
psql:/var/opt/gitlab/backups/db/database.sql:22: ERROR: must be owner of extension plpgsql
psql:/var/opt/gitlab/backups/db/database.sql:2931: WARNING: no privileges could be revoked for "public" (two occurrences)
psql:/var/opt/gitlab/backups/db/database.sql:2933: WARNING: no privileges were granted for "public" (two occurrences)
Be advised that, backup is successfully restored in spite of these warnings.
The rake task runs this as the gitlab
user which does not have the superuser access to the database. When restore is initiated it will also run as gitlab
user but it will also try to alter the objects it does not have access to.
Those objects have no influence on the database backup/restore but they give this annoying warning.
For more information see similar questions on postgresql issue trackerhere and here as well as stack overflow.