How to deploy and update cc-backend
Categories:
Workflow for deployment
Why we do not provide a docker container
The ClusterCockpit web backend binary has no external dependencies, everything is included in the binary. The external assets, SQL database and job archive, would also be external in a docker setup. The only advantage of a docker setup would be that the initial configuration is automated. But this only needs to be done one time. We therefore think that setting up docker, securing and maintaining it is not worth the effort.It is recommended to install all ClusterCockpit components in a common directory, e.g. /opt/monitoring, var/monitoring or var/clustercockpit.
In the following we use /opt/monitoring.
Two systemd services run on the central monitoring server:
- clustercockpit : binary cc-backend in
/opt/monitoring/cc-backend. - cc-metric-store : Binary cc-metric-store in
/opt/monitoring/cc-metric-store.
ClusterCockpit is deployed as a single binary that embeds all static assets.
We recommend keeping all cc-backend binary versions in a folder archive and
linking the currently active one from the cc-backend root.
This allows for easy roll-back in case something doesn’t work.
Please Note
cc-backend is started with root rights to open the privileged ports (80 and
443). It is recommended to set the configuration options user and group, in
which case cc-backend will drop root permissions once the ports are taken.
You have to take care, that the ownership of the ./var folder and
its contents are set accordingly.Workflow to update
This example assumes the DB and job archive versions did not change. In case the new binary requires a newer database or job archive version read here how to migrate to newer versions.
- Stop systemd service:
sudo systemctl stop clustercockpit.service
- Backup the sqlite DB file! This is as simple as to copy it.
- Copy new
cc-backendbinary to/opt/monitoring/cc-backend/archive(Tip: Use a date tag likeYYYYMMDD-cc-backend). Here is an example:
cp ~/cc-backend /opt/monitoring/cc-backend/archive/20231124-cc-backend
- Link from
cc-backendroot to current version
ln -s /opt/monitoring/cc-backend/archive/20231124-cc-backend /opt/monitoring/cc-backend/cc-backend
- Start systemd service:
sudo systemctl start clustercockpit.service
- Check if everything is ok:
sudo systemctl status clustercockpit.service
- Check log for issues:
sudo journalctl -u clustercockpit.service
- Check the ClusterCockpit web frontend and your Slurm adapters if anything is broken!
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