Managed ClickHouse® version support policy
Managed ClickHouse® follows the upstream ClickHouse long-term support, or LTS, release model. This helps you use stable, supported versions and plan upgrades before versions reach end of life.
Managed ClickHouse versions move through defined lifecycle stages, from availability to end of life. Each stage determines whether you can create new services, receive security updates, or need to plan an upgrade.
Upstream LTS releases
Upstream ClickHouse typically releases two LTS versions each year, one in March
and one in August. The March release carries the minor version .3, for example 25.3,
and the August release carries the minor version .8, for example 25.8.
Upstream LTS versions receive security updates for 12 months.
Lifecycle stages
Each Managed ClickHouse LTS version moves through the following stages:
- Limited Availability (LA): The version is available for selected early testing. LA versions are not publicly announced.
- Early Availability (EA): The version is stable and available to all customers. Some settings, features, and UI elements might still change.
- General Availability (GA): The version is stable and fully available.
- End of Availability (EOA): You can no longer create new services with the version. Exoscale doesn’t guarantee security updates after EOA. EOA is announced ahead of End of Life.
- End of Life (EOL): Exoscale removes the version from support and automatically upgrades existing services to the next supported version.
Support policy
Exoscale supports two active generally available LTS versions at a time.
Exoscale announces each new EA and GA version in the Exoscale changelog, together with the End of Availability and End of Life dates of the version it replaces.
When a new version becomes available, new service creation stops for the oldest supported version, and that version enters EOA. After EOL, Exoscale upgrades services still running that version to the next supported version.
Note
Not every upstream LTS release is offered on Exoscale, and Exoscale does not publish a fixed delay between an upstream release and its availability here. The authoritative list is always the one your organization can actually select, see Version lifecycle dates below.
Security updates
Exoscale delivers security updates as maintenance updates that you apply during the maintenance window. An update that addresses a critical vulnerability can be applied automatically if it is left pending.
Once a version reaches EOA, Exoscale doesn’t guarantee further security updates for it, which is why EOA dates are announced ahead of time in the changelog.
Version lifecycle dates
End of Availability and End of Life dates for each supported version are announced in the
Exoscale changelog. List the versions your organization can
use at any time with exo dbaas type show clickhouse.