Upgrading to ArangoDB 3.0
Please read the following sections if you upgrade from a previous version to ArangoDB 3.0. Please be sure that you have checked the list of changes in 3.0 before upgrading.
Migrating databases and collections from ArangoDB 2.8 to 3.0
ArangoDB 3.0 does not provide an automatic update mechanism for database directories created with the 2.x branches of ArangoDB.
In order to migrate data from ArangoDB 2.8 (or an older 2.x version) into
ArangoDB 3.0, it is necessary to export the data from 2.8 using
and then import the dump into a fresh ArangoDB 3.0 with
To do this, first run the 2.8 version of
arangodump to export the database
data into a directory.
arangodump will dump the
_system database by default.
In order to make it dump multiple databases, it needs to be invoked once per
source database, e.g.
# in 2.8 arangodump --server.database _system --output-directory dump-system arangodump --server.database mydb --output-directory dump-mydb ...
That will produce a dump directory for each database that
called for. If the server has authentication turned on, it may be necessary to
provide the required credentials when invoking
arangodump --server.database _system --server.username myuser --server.password mypasswd --output-directory dump-system
The dumps produced by
arangodump can now be imported into ArangoDB 3.0 using
the 3.0 version of
# in 3.0 arangorestore --server.database _system --input-directory dump-system arangorestore --server.database mydb --input-directory dump-mydb ...
arangorestore will by default fail if the target database does not exist. It can
be told to create it automatically using the option
arangorestore --server.database mydb --create-database true --input-directory dump-mydb
And again it may be required to provide access credentials when invoking
arangorestore --server.database mydb --create-database true --server.username myuser --server.password mypasswd --input-directory dump-system
Please note that the version of dump/restore should match the server version, i.e.
it is required to dump the original data with the 2.8 version of
and restore it with the 3.0 version of
After that the 3.0 instance of ArangoDB will contain the databases and collections that were present in the 2.8 instance.
Adjusting authentication info
Authentication information was stored per database in ArangoDB 2.8, meaning there
could be different users and access credentials per database. In 3.0, the users are
stored in a central location in the
_system database. To use the same user setup
as in 2.8, it may be required to create extra users and/or adjust their permissions.
In order to do that, please connect to the 3.0 instance with an ArangoShell (this
will connect to the
_system database by default):
arangosh --server.username myuser --server.password mypasswd
Use the following commands to create a new user with some password and grant them access to a specific database
require("@arangodb/users").save(username, password, true); require("@arangodb/users").grantDatabase(username, databaseName, "rw");
For example, to create a user
myuser with password
mypasswd and give them
access to databases
mydb2, the commands would look as follows:
require("@arangodb/users").save("myuser", "mypasswd", true); require("@arangodb/users").grantDatabase("myuser", "mydb1", "rw"); require("@arangodb/users").grantDatabase("myuser", "mydb2", "rw");
Existing users can also be updated, removed or listed using the following commands:
/* update user myuser with password mypasswd */ require("@arangodb/users").update("myuser", "mypasswd", true); /* remove user myuser */ require("@arangodb/users").remove("myuser"); /* list all users */ require("@arangodb/users").all();
The dump/restore procedure described above will not export and re-import Foxx applications. In order to move these from 2.8 to 3.0, Foxx applications should be exported as zip files via the 2.8 web interface.
The zip files can then be uploaded in the “Services” section in the ArangoDB 3.0 web interface. Applications may need to be adjusted manually to run in 3.0. Please consult the migration guide for Foxx apps.
An alternative way of moving Foxx apps into 3.0 is to copy the source directory of a 2.8 Foxx
application manually into the 3.0 Foxx apps directory for the target database (which is normally
/var/lib/arangodb3-apps/_db/<dbname>/ but the exact location is platform-specific).