MicroCloud 3.4.0 release notes¶
This is an LTS release and is recommended for production use. It’s the first LTS release of track 3, succeeding the 2.1.z LTS track and superseding the 3.1, 3.2, and 3.3 feature releases.
Highlights¶
This section highlights new and improved features in this release.
Cluster Manager improvements¶
Cluster Manager was introduced in MicroCloud 3.1 to let you manage and monitor multiple MicroCloud clusters from a single application. This release adds further integration between MicroCloud and Cluster Manager:
The LXD URL reported to Cluster Manager can now be overridden, instead of always using the auto-detected address. This is useful when the LXD UI is reachable through a different address than the one MicroCloud would otherwise advertise (for example, behind a reverse proxy or load balancer).
microcloud cluster-manager set lxd_url https://example.com:8443
The cluster’s UUID is now included in the heartbeat status payload sent to Cluster Manager, making it easier to correlate a MicroCloud cluster with its representation in Cluster Manager.
Observability integration via Juju charm¶
MicroCloud can now be observed through the Canonical Observability Stack (COS) using the microcloud Juju charm.
The charm attaches to an already-deployed MicroCloud cluster and collects metrics from LXD, MicroCeph, and MicroOVN on each member, which can then be related to COS for visualization in Grafana.
Snap base updated to core26¶
The MicroCloud snap now builds on the core26 base instead of core24.
Backwards-incompatible changes¶
These changes are not compatible with older versions of MicroCloud.
Minimum system requirement changes¶
The minimum supported version of some components has changed:
Go: 1.27.1 (used to build MicroCloud)
snapd: 2.75 (required by the
core26base)
Upgrading to the new version¶
If you are currently running MicroCloud 2 LTS, this release is the recommended target for production upgrades to track 3. See the Upgrade MicroCloud guide for information on how to switch the MicroCloud track.
If you are currently using an earlier 3.1, 3.2, or 3.3 feature release, refer to the Update MicroCloud guide for information on how to move onto the 3.4.0 LTS version.