Prepare release notes for v1.7.0 beta.4 #8110
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Signed-off-by: Derek McGowan <derek@mcg.dev>
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Generated notes (See unabridged version in gist)
Welcome to the v1.7.0-beta.4 release of containerd!
This is a pre-release of containerd
The eighth major release of containerd includes new functionality alongside many improvements.
This release is intended to be the last major release of containerd 1.x before 2.0.
Some functionality in this release may be considered experimental or unstable, but will become stable or default in 2.0.
This release still adheres to our backwards compability guarantees and users who do not use or enable new functionality should use this release with the same stability expectations.
The previous 1.6 release has also become a long term stable release for users who prefer releases with mostly stability improvements and wish to wait a few releases for new functionality.
This is a beta release and includes some functionality which is not yet complete. While most APIs are finalized before merge, they are subject to change until the official release.
Highlights
Sandbox API (experimental)
The sandbox API provides a new way of managing containerd's shim, providing more flexibility and functionality for multi-container environments such as Pods and VMs.
This API makes it easier to manage these groups of containers at a higher level and offers new extension points for shim implementations and clients.
Transfer Service (experimental)
The transfer service provides a simple interface to transfer artifact objects between any source and destination. This allows for
pull and push operations to be done in containerd whether requested from clients or plugins. It is experimental in this release
to allow for further plugin development and integration into existing plugins.
See the Transfer Docs
NRI (experimental)
The Node Resource Interface is a common framework for plugging extensions into OCI-compatible container runtimes. It provides
basic mechanisms for plugins to track the state of containers and to make limited changes to their configuration.
This release introduces NRI v0.2.0 with an updated plugin interface to cover a wide range of use cases.
See the NRI Docs
Platform Support
Runtime Features
gRPC Shim Support (experimental)
Adds support for shims to use gRPC in addition to ttrpc. Existing ttrpc shim support is not going
away and will continue to be recommended for the best performance and lowest shim memory overhead.
The gRPC support allows implementation of a wider range of shim implementations which may not
have access to a stable ttrpc library in the implementation language. The shim protocol is also
updated to allow the shims to specify the protocol which is supported.
Road to 2.0
Refactoring
There are multiple places in the code today which are being targeted for refactoring to make long term support easier and to provide more extension points.
The CRI plugin is the most complex containerd plugin with a wide range of functionality. A major effort in this release and before 2.0 involves moving functionality
out of the single CRI plugin into smaller-scoped containerd plugins, such that they can be used and tested independenty. The new sandbox and distribution interfaces provide one example of this,
but it also being done for image and network management.
The version of ttrpc has been updated this release to support streaming, allowing existing grpc services to use ttrpc.
Services are being refactored to allow ttrpc implementations, which can be served via shim and accessed using the new sandbox management capability.
Remove gogoproto.customtype (#6699)
Remove enumvalue_customname, goproto_enum_prefix and enum_customname (#6708)
Remove all gogoproto extensions (#6829)
Migrate off from github.com/gogo/protobuf (#6841)
ttrpc streaming (ttrpc#107)
Add unpack interface for client (#6749)
Add collectible resources to metadata gc (#6804)
Configuration
Existing CRI configurations will be supported until 2.0.
Any functionality split out of CRI will have their configuration migrated to new plugins.
Deprecated configuration versions and configurations for deprecated features will be removed in 2.0.
Deprecation
The 2.0 release will remove any feature deprecated in 1.x. Features deprecated in this release include.
CRI Updates
Other
FetcherByDigestfor fetching blobs without fetching a manifest (#7460)See the changelog for complete list of changes
Please try out the release binaries and report any issues at
https://github.com/containerd/containerd/issues.
Contributors
...
Changes
...
Dependency Changes
Previous release can be found at v1.6.0
Which file should I download?
containerd-<VERSION>-<OS>-<ARCH>.tar.gz: ✅Recommended. Dynamically linked with glibc 2.31 (Ubuntu 20.04).containerd-static-<VERSION>-<OS>-<ARCH>.tar.gz: Statically linked. Expected to be used on non-glibc Linux distributions. Not position-independent.cri-containerd-<VERSION>-<OS>-<ARCH>.tar.gz: (Deprecated)cri-containerd-cni-<VERSION>-<OS>-<ARCH>.tar.gz: (Deprecated)In addition to containerd, typically you will have to install runc
and CNI plugins from their official sites too.
See also the Getting Started documentation.