Editing Category:CSC

[[category:Tetra Clients]]
[[category:CSC]]

==Training on CSC PROJECT PART 1. Dated 24 OCT 2024 - Tetra Support Staff - Manish Singh==

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'''Video summary:''' Overview of the CSC client's Apache CloudStack private-cloud environment, demoed first on an Ubuntu test setup then walked through against the real production environment (two locations, Noida and Pune). Covers the CloudStack dashboard/architecture: the management node (controls everything via API/UI, backed by a MariaDB database), Compute hosts (physical hypervisors, each running multiple KVM guest VMs that can be live-migrated between hosts, rebooted, or put into maintenance mode from the UI), and primary vs. secondary storage (primary for live VM/management data, secondary -- originally NFS, since migrated to Ceph for resilience -- for ISOs and templates used to build new VMs). The main project work: upgrading the CloudStack version itself, upgrading each management node's underlying OS off end-of-life CentOS onto Rocky Linux, and setting up a Galera cluster so the two management nodes replicate their database and can fail over to each other -- validated first in the Ubuntu test environment, already live in Pune, still pending client downtime approval in Noida. Also covers the general host-replacement pattern used across the client's compute fleet: migrate all VMs off a host, reformat it onto Rocky Linux, and re-add it to the cluster.