Long Term Support (LTS)
The Nevis LTS lifecycle model follows a fixed release cycle. New features are held back until a new major LTS release version is available, after a predefined and fixed period of time. To ensure highest security at all times, security patches and functional bug fixes are released more frequently.
You most likely want to choose the LTS lifecycle model if you favor stability over the newest and latest features.
Each major version of a Long Term Support release consists of three support periods: Full Support, Maintenance Support and Extended Life Support. Additionally, we provide three months of Production Support followed by ten months of Fade-Out Support for each minor LTS version. This means that you have to update at least once a year to stay supported.
Example: You install the minor LTS version released in November 2020. You skip the next three minor releases. When the November 2021 version is released, you update directly to this version. Perform this update within one month.
Major Version Lifecycle Periods
During the Full Support stage, Nevis proactively releases minor updates every three months, to improve the stability and performance of the platform and to address security vulnerabilities. Additionally, customers are entitled to receive technical support. There are no software enhancements nor additions of new functionality.
We recommend updating to each minor version as soon as it is released.
At the end of the Full Support period, a new major LTS version is released. We recommend upgrading to this new major version within 6 months after it is released.
Access to software artifacts During the Full Support stage, customers have access to software artifacts on our Customer Portal.
The Maintenance Support stage starts as soon as the new major LTS version (LTS+1) is available. In this third year of the LTS lifecycle, we still proactively provide regular security fixes, addressing stability and security vulnerabilities. Additionally, customers are still eligible for technical support. However, we discourage from starting any new projects at this stage.
At the end of the Maintenance Support period, security and functional fixes as well as technical support and access to software artifacts will be halted. By now, you should be upgraded to the latest major LTS version (LTS+1). Only if you have bought a special contract for Extended Life Support you will be able to extend the product life by another year.
Access to software artifacts During the Maintenance Support stage, customers have access to software artifacts on our Customer Portal.
Extended Life Support (ELS)
If your environment requires more than a year to upgrade to a new major LTS version, we offer an LTS Extended Life Support contract. If you have this contract, you are eligible for another year of security fixes and technical support. However, the security fixes are no longer released every three months but only on a critical need basis.
We strongly discourage from starting new projects with the software during this year.
At the end of the fourth year of the software lifecycle, Nevis will no longer provide any security or functional fixes, nor technical support. The product lifecycle is over.
Access to software artifacts During the Extended Life Support stage, we will only provide access to software artifacts on our Customer Portal on demand.
Overview of lifecycle periods and detailed support elements
The next table shows the Nevis services, including support and software maintenance, during each stage of the Nevis LTS lifecycle.
|Description||Full support||Maintenence support||Extended life support|
|Release Frequency||Quarterly||Quarterly||None (only on critical need basis)|
|New Features ||No||No||No|
|Functional Fixes ||Yes||No||No|
|Security Fixes ||Yes||Yes||Only with ELS contract|
|Technical Support ||Yes||Yes||Only with ELS contract|
|Delivery Mode (updated software artifacts like nevisAppliance, RPMs, Docker Images and documentation)||Proactive||Proactive||On demand|
|Allowed for new projects||Yes||No||No|
|Access to software artifacts on our Customer Portal||Yes||Yes||On demand|
 Software enhancements are additions to functionality beyond correcting defects.
 As a temporary measure, Nevis Security may choose to address critical issues that significantly impact customer business with a workaround, while the functional fix is being prepared.
 Refer to "Issue Risk Assessment" in the Security Bulletins for more details.
 Technical Support access depends on the Service Level included in your NEVIS support contract.
Minor Version Lifecycle Periods
The Production Support stage starts as soon as a new minor LTS version is released and normally lasts 3 months*. Production Support includes all the support features that come with the major lifecycle phase the minor version is part of (see the section "Overview of lifecycle periods and detailed support elements" above).
Example: The major LTS version of my component is in the Maintenance Support period. In May 2022, a minor version update is released. Production Support for this minor version includes security fixes and eligibility for technical support and lasts 3 months, until the August 2022 minor version update is released.
The Fade-Out Support period starts as soon as the newest minor LTS version is available and normally lasts 10 months*. During the Fade-Out Support stage of a minor version, you are still entitled to receive technical support. However, you cannot claim any other support feature that comes with the lifecycle stage of the major version of your component.
Example 1: It is August 2021 and a new minor version update is released for my component. I am still using the May 2021 minor version. My version is now under Fade-Out Support, which includes technical support only, for 10 months (until June 2022).
Example 2: In November 2021, the lifecycle period of my component changed from Full Support to Maintenance Support. Now, it is May 2022 and a new minor version update is released for my component. I am still using the February 2022 minor version. From this moment on, my version is under Fade-Out Support, which includes technical support only and lasts 6 months (until November 2022). If I would have an Extended Life Support contract, the total duration of the Fade-Out Support for my version is extended to 10 months (until March 2023).
*) Production or Fade-Out Support never extends beyond the end of Maintenance Support (or Extended Life Support, if you have such a contract).
Provisional dates of future releases
The following table gives an overview of the provisional release dates for Long Term Support versions. All future dates are close approximations, non-definitive and subject to change.
Security patches and bug fixes are released quarterly mid/end February, May, August and November of each year. Be aware that security patches and bug fixes are always built upon the latest minor version.
Example: For the major version 2.201911.x LTS there have been security updates released in February and May 2020. The security updates and bug fixes for August 2020 will thus be built based on the minor May version.
|Name||Major Version||General Availability||End of Full Support||End of Maintenance Support||End of Extended Life Support|
|LTS-2019||2.201911.x LTS||November 20, 2019||November 17, 2021||November 16, 2022||November 15, 2023|
|LTS-2021||2.202111.x LTS||November 17, 2021||November 15, 2023||November 13, 2024||November 12, 2025|
New minor version updates are released quarterly mid/end February, May, August and November of each year.
|Quarter||Minor Version||General Availability||End of Production Support||End of Fade-Out Support|
|2021-Q1 and before||See All Long Term Support Releases (LTS)|
|2021-Q2||2.201911.754 LTS||May 19, 2021||August 18, 2021||June 18, 2022|
|2021-Q3||2.201911.756 LTS||August 18, 2021||November 17, 2021||September 17, 2022|
|2021-Q4||2.202111.3 LTS||November 17, 2021||February 16, 2022||December 16, 2022|
|2022-Q1||2.202111.11-LTS||February 16, 2022||May 18, 2022||March 15, 2023|
|2022-Q2||2.202111.19-LTS||May 18, 2022||August 17, 2022||June 17, 2023|
|2022-Q3||2.202111.22-LTS||August 17, 2022||November 15,2022||September 16, 2023|
|2022-Q4||2.202111.xx-LTS||November 15, 2022||February 15, 2023||Decembert 14, 2023|
|Quarter||Minor Version||General Availability||End of Production Support||End of Fade-Out Support||End of Fade-Out Support (with ELS contract)|
|2021-Q4||2.201911.763 LTS||November 17, 2021||February 16, 2022||November 15, 2022||December 16, 2022|
|2022-Q1||2.201911.768 LTS||February 16, 2022||May 18, 2022||November 15, 2022||March 15, 2023|
|2022-Q2||2.201911.778 LTS||May 18, 2022||August 17, 2022||November 15, 2022||June 14, 2023|
|2022-Q3||2.201911.788 LTS||August 17, 2022||November 15, 2022||November 15, 2022||November 15, 2023|
Extended life support
The last minor version released within Maintenance Support receives Production Support.
There is no fixed release schedule for critical security fixes delivered within the Extended Life Support period.
|Minor Version||General Availability||End of Production Support|
|2.201911.xxx LTS||August 17, 2022||November 15, 2023|