Maintenance and upgrading

1. Commercial support
2. Maintaining Arvados
   1. Modification of the config.yml file
   2. Distributing the configuration file
   3. Restart the services affected by the change
3. Upgrading Arvados

Commercial support

Arvados is 100% open source software. Anyone can download, install, maintain and upgrade it. However, if this is not something you want to spend your time and energy doing, Curii Corporation provides managed Arvados installations as well as commercial support for Arvados. Please contact info@curii.com for more information.

If you’d prefer to do things yourself, a few starting points for maintaining and upgrading Arvados can be found below.

Maintaining Arvados

After Arvados is installed, periodic configuration changes may be required to adapt the software to your needs. Arvados uses a unified configuration file, which is normally found at /etc/arvados/config.yml.

Making a configuration change to Arvados typically involves three steps:

• modification of the config.yml file
• distribution of the modified file to the machines in the cluster
• restarting of the services affected by the change

Modification of the config.yml file

Consult the configuration reference or another part of the documentation to identify the change to be made.

Preserve a copy of your existing configuration file as a backup, and make the desired modification.

Run arvados-server config-check to make sure the configuration file has no errors and no warnings.

Distribute the configuration file

It is very important to keep the config.yml file in sync between all the Arvados system nodes, to avoid issues with services running on different versions of the configuration.

We provide installer.sh to distribute config changes. You may also do your own orchestration e.g. scp, configuration management software, etc.

Restart the services affected by the change

If you know which Arvados service uses the specific configuration that was modified, restart those services. When in doubt, restart all Arvados system services.

To check for services that have not restarted since the configuration file was updated, run the arvados-server check command on each system node.

To test functionality and check for common problems, run the arvados-client sudo diagnostics command on a system node.

Upgrading Arvados

Upgrading Arvados typically involves the following steps:

1. consult the upgrade notes and the release notes for the release you want to upgrade to
2. Wait for the cluster to be idle and stop Arvados services.
3. Make a backup of your database, as a precaution.
4. update the configuration file for the new release, if necessary (see Maintaining Arvados above)
5. Update compute nodes
   1. (cloud) Rebuild and deploy the compute node image
   2. (slurm/LSF) Upgrade the python3-arvados-fuse package used on your compute nodes
6. Install new packages using apt-get upgrade or yum upgrade.
7. Wait for package installation scripts as they perform any necessary data migrations.
8. Run arvados-server config-check to detect configuration errors or deprecated entries.
9. Verify that the Arvados services were restarted as part of the package upgrades.
10. Run arvados-server check to detect services that did not restart properly.
11. Run arvados-client sudo diagnostics to test functionality.

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