Welcome to the v2.0.0-rc.6 release of containerd! This is a pre-release of containerd

The first major release of containerd 2.x focuses on the continued stability of containerd's core feature set with an easy upgrade from containerd 1.x. This release includes the stabilization of new features added in the last 1.x release as well as the removal of features which were deprecated in 1.x. The goal is to support the vast community of containerd users well into the future along with their ever increasing deployment footprints and variety of use cases.

Highlights

• Allow sections of Plugins to be merged, and not overwritten as entire sections. (#9982)
• Add Update API for sandbox controller (#9903)
• Configure otel from env instead of config.toml (#8970)
• Enable NRI by default (#9744)
• Add PluginInfo to introspection API (#9442)
• Remove overlayfs volatile option on temp mounts (#9555)
• Expose usage of deprecated features (#9258)
• Use Intel ISA-L's igzip if available (#9200)
• Introduce top level config migration (#9223)
• Add image delete target (#8989)
• Remove LimitNOFILE from containerd.service (#8924)
• Add support for image expiration during garbage collection (#9022)
• Reduce the contention between ref lock and boltdb lock in content store (#8792)
• Remove "containerd.io/restart.logpath" label (#8264)
• Remove aufs snapshotter (#8263)
• Fix deadlock during NRI plugin registration (containerd/nri#79)
• Fix deadlock when writing to pipe blocks (containerd/ttrpc#168)

Build and Release Toolchain

• Generate attestation for artifacts during release (#10543)
• Remove cri-containerd-*.tar.gz release bundles (#9096)

Container Runtime Interface (CRI)

• Use 'UserSpecifiedImage' from CRI to set the image-name annotation (#10747)
• Fine-grained SupplementalGroups control (#9737)
• Add support to set loopback to up (#10238)
• Add support for multiple subscribers to CRI container events (#9661)
• Enable CDI by default (#9621)
• Remove non-sandboxed CRI implementation (#9228)
• Add support for userns in stateless and stateful pods with idmap mounts (KEP-127, k8s >= 1.27) (#8287)
• Use sandboxed CRI by default (#8994)
• Implement RuntimeConfig CRI call (#8722)
• Add support for user namespaces (KEP-127) (#8803)
• Remove CRI v1alpha2 (#8276)

Go client

• Add api Go module and move all protos under api (#10151)
• Move packages based on contributing guide (#9365)
• Generalize plugin library (#9214)
• Use github.com/containerd/log (#9086)

Image Distribution

• Support to syncfs after pull by using diff plugin (#10284)
• Skip "unknown" in image platform listing (#10257)
• Update unpacker to fetch all provided content (#10202)
• Enable Transfer service API to support plain HTTP (#10024)
• Enable Transfer service to use registry configuration directory (#9908)
• Disable the support for Schema 1 images (#9765)
• Update Transfer service to add OCI descriptors to Progress structure (#9630)
• Update import and export to allow references to missing content (#9554)
• Add option to perform syncfs after pull (#9401)
• Add image verifier transfer service plugin system based on a binary directory (#8493)

Runtime

• Implement RuntimeStatus.features.supplemental_groups_policy from KEP-3619 (#10410)
• Add pprof to runc-shim (#10242)
• Provide runtime options in plugin info (#10251)
• Store bootstrap parameters in sandbox metadata (#9736)
• Update apparmor to allow confined runc to kill containers (#10123)
• Support vsock connection to task api (#9738)
• Update RuntimeDefault seccomp profile to disallow io_uring related syscalls (#9320)
• Switch runc shim to task service v3 and fix restore (#9233)
• Add sandboxer configuration and move sandbox controllers to plugins (#8268)
• Add annotations to CreateSandbox request (#8960)
• Add SandboxMetrics (#8680)
• Publish sandbox events (#8602)
• Remove the CriuPath field from runc's options (#8279)
• Remove io.containerd.runtime.v1.linux and io.containerd.runc.v1 (#8262)

Security Advisories

• [medium] RAPL accessible to a container GHSA-7ww5-4wqc-m92c

Breaking

• Remove disable_cgroup from CRI config (#10594)
• Disable the support for Schema 1 images (#9765)
• Update RuntimeDefault seccomp profile to disallow io_uring related syscalls (#9320)
• Move client to subpackage (#9316)
• Remove LimitNOFILE from containerd.service (#8924)
• Remove CRI v1alpha2 (#8276)
• Remove io.containerd.runtime.v1.linux and io.containerd.runc.v1 (#8262)
• Remove "containerd.io/restart.logpath" label (#8264)
• Remove aufs snapshotter (#8263)

Deprecations

• Update warnings for deprecated CRI config fields (#10509)
• Add type alias for event Envelope (#10279)
• Postpone removal of deprecated CRI config properties (#9966)
• Deprecate go-plugin configuration option (#9238)
• CNI conf_template in CRI is no longer deprecated (#8637)

Please try out the release binaries and report any issues at https://github.com/containerd/containerd/issues.

Contributors

• Derek McGowan
• Akihiro Suda
• Maksym Pavlenko
• Wei Fu
• Phil Estes
• Sebastiaan van Stijn
• Samuel Karp
• Stefan Berger
• Krisztian Litkey
• Kazuyoshi Kato
• Rodrigo Campos
• Austin Vazquez
• Danny Canter
• Abel Feng
• Mike Brown
• Akhil Mohan
• Kirtana Ashok
• Iceber Gu
• Gabriel Adrian Samfira
• Jin Dong
• Kohei Tokunaga
• Bjorn Neergaard
• Brian Goff
• Justin Chadwell
• rongfu.leng
• James Sturtevant
• Davanum Srinivas
• Paul "TBBle" Hampson
• Henry Wang
• Enrico Weigelt
• Laura Brehm
• Marat Radchenko
• Paweł Gronowski
• Shingo Omura
• Hsing-Yu (David) Chen
• Ilya Hanov
• Cardy.Tang
• Swagat Bora
• Aditi Sharma
• Amit Barve
• Bryant Biggs
• Evan Lezar
• James Jenkins
• Jordan Liggitt
• Kay Yan
• Markus Lehtonen
• Nashwan Azhari
• Shuaiyi Zhang
• Vinayak Goyal
• helen
• Alexandru Matei
• Anthony Nandaa
• Avi Deitcher
• Charity Kathure
• Cory Snider
• Ed Bartosh
• Etienne Champetier
• Kevin Parsons
• Michael Zappa
• Milas Bowman
• lengrongfu
• ningmingxiao
• yanggang
• zounengren
• Aditya Ramani
• Adrian Reber
• Amir M. Ghazanfari
• Artem Khramov
• Brad Davidson
• Chen Yiyang
• Christian Muehlhaeuser
• Djordje Lukic
• Edgar Lee
• Eric Lin
• Ethan Lowman
• Jiang Liu
• June Rhodes
• Kern Walster
• Lei Jitang
• Lucas Rattz
• Mahamed Ali
• Maksim An
• Michael Crosby
• Peteris Rudzusiks
• Ray Burgemeestre
• Sam Edwards
• Samruddhi Khandale
• Sascha Grunert
• Steve Griffith
• Tony Fang
• VERNOU Cédric
• Vishal Reddy Gurrala
• Xiaojin Zhang
• hang.jiang
• harshitasao
• jerryzhuang
• roman-kiselenko
• zhanluxianshen
• Aaron Lehmann
• AbdelrahmanElawady
• Adrien Delorme
• Alex Couture-Beil
• Alex Ellis
• Alex Rodriguez
• Angelos Kolaitis
• Antonio Huete Jimenez
• Antonio Ojea
• Antti Kervinen
• Arash Haghighat
• Ben Foster
• Benjamin Peterson
• Bin Tang
• Bin Xin
• BinBin He
• Brennan Kinney
• Changqing Li
• ChengenH
• ChengyuZhu6
• Christian Stewart
• Colin O'Dell
• Craig Ingram
• Daisy Rong
• David Porter
• Derek Nola
• Eng Zer Jun
• Erikson Tung
• Fabiano Fidêncio
• Fahed Dorgaa
• Gabriela Cervantes
• Gary McDonald
• Iain Macdonald
• James Lakin
• Jan Dubois
• Jaroslav Jindrak
• Javier Maestro
• Jian Wang
• Jiongchi Yu
• Julien Balestra
• Kir Kolyshkin
• Kirill A. Korinsky
• Konstantin Khlebnikov
• Lei Liu
• Matteo Pulcini
• Mauri de Souza Meneguzzo
• Mike Baynton
• Pan Yibo
• Paul Meyer
• Qasim Sarfraz
• Qiutong Song
• Reinhard Tartler
• Robbie Buxton
• Robert-André Mauchin
• Ruihua Wen
• Saket Jajoo
• Sameer
• Shengjing Zhu
• Shiming Zhang
• Shukui Yang
• StepSecurity Bot
• Talon
• Tariq Ibrahim
• Tianon Gravi
• Tim Hockin
• TinaMor
• Tobias Klauser
• Tomáš Virtus
• Tõnis Tiigi
• Wang Xinwen
• William Chen
• Xinyang Ge
• Yang Yang
• Yibo Zhuang
• Yuhang Wei
• Yury Gargay
• Zechun Chen
• Zhang Tianyang
• Zoe
• baijia
• bo.jiang
• bzsuni
• charles-chenzz
• chschumacher1994
• cormick
• guangli.bao
• guangwu
• jinda.ljd
• jingtao.liang
• krglosse
• pigletfly
• rokkiter
• wangxiang
• zhangpeng
• zhaojizhuang
• 吴小白
• 张钰
• 沈陵
• 谭九鼎

Dependency Changes

• dario.cat/mergo v1.0.1 new
• github.com/AdaLogics/go-fuzz-headers 1f10f66a31bf -> ced1acdcaa24
• github.com/AdamKorcz/go-118-fuzz-build 5330a85ea652 -> 8075edf89bb0
• github.com/Microsoft/go-winio v0.6.0 -> v0.6.2
• github.com/Microsoft/hcsshim v0.10.0-rc.7 -> v0.12.8
• github.com/cenkalti/backoff/v4 v4.2.0 -> v4.3.0
• github.com/cespare/xxhash/v2 v2.2.0 -> v2.3.0
• github.com/checkpoint-restore/checkpointctl v1.2.1 new
• github.com/checkpoint-restore/go-criu/v7 v7.2.0 new
• github.com/cilium/ebpf v0.9.1 -> v0.11.0
• github.com/containerd/cgroups/v3 v3.0.1 -> v3.0.3
• github.com/containerd/console v1.0.3 -> v1.0.4
• github.com/containerd/containerd/api v1.8.0-rc.4 new
• github.com/containerd/continuity v0.3.0 -> v0.4.3
• github.com/containerd/errdefs v0.3.0 new
• github.com/containerd/errdefs/pkg v0.3.0 new
• github.com/containerd/go-cni v1.1.9 -> v1.1.10
• github.com/containerd/go-runc v1.0.0 -> v1.1.0
• github.com/containerd/imgcrypt v1.1.7 -> v1.2.0-rc1
• github.com/containerd/log v0.1.0 new
• github.com/containerd/nri v0.3.0 -> v0.7.0
• github.com/containerd/otelttrpc ea5083fda723 new
• github.com/containerd/platforms v0.2.1 new
• github.com/containerd/plugin v0.1.0 new
• github.com/containerd/ttrpc v1.2.1 -> b5cd6e4b3287
• github.com/containerd/typeurl/v2 v2.1.0 -> v2.2.0
• github.com/containernetworking/cni v1.1.2 -> v1.2.3
• github.com/containernetworking/plugins v1.2.0 -> v1.5.1
• github.com/containers/ocicrypt v1.1.6 -> v1.2.0
• github.com/cpuguy83/go-md2man/v2 v2.0.2 -> v2.0.5
• github.com/davecgh/go-spew v1.1.1 -> d8f796af33cc
• github.com/distribution/reference v0.6.0 new
• github.com/emicklei/go-restful/v3 v3.10.1 -> v3.11.0
• github.com/felixge/httpsnoop v1.0.4 new
• github.com/fsnotify/fsnotify v1.6.0 -> v1.7.0
• github.com/fxamacker/cbor/v2 v2.7.0 new
• github.com/go-jose/go-jose/v4 v4.0.2 new
• github.com/go-logr/logr v1.2.3 -> v1.4.2
• github.com/golang/protobuf v1.5.2 -> v1.5.4
• github.com/google/go-cmp v0.5.9 -> v0.6.0
• github.com/google/uuid v1.3.0 -> v1.6.0
• github.com/gorilla/websocket v1.5.0 new
• github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus v1.0.1 new
• github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.1.0 new
• github.com/grpc-ecosystem/grpc-gateway/v2 v2.7.0 -> v2.22.0
• github.com/intel/goresctrl v0.3.0 -> v0.8.0
• github.com/klauspost/compress v1.16.0 -> v1.17.11
• github.com/mdlayher/socket v0.4.1 new
• github.com/mdlayher/vsock v1.2.1 new
• github.com/moby/spdystream v0.2.0 -> v0.4.0
• github.com/moby/sys/mountinfo v0.6.2 -> v0.7.2
• github.com/moby/sys/sequential v0.5.0 -> v0.6.0
• github.com/moby/sys/signal v0.7.0 -> v0.7.1
• github.com/moby/sys/symlink v0.2.0 -> v0.3.0
• github.com/moby/sys/user v0.3.0 new
• github.com/moby/sys/userns v0.1.0 new
• github.com/munnerz/goautoneg a7dc8b61c822 new
• github.com/mxk/go-flowrate cca7078d478f new
• github.com/opencontainers/image-spec 3a7f492d3f1b -> v1.1.0
• github.com/opencontainers/runtime-spec v1.1.0-rc.1 -> v1.2.0
• github.com/opencontainers/runtime-tools 946c877fa809 -> 2e043c6bd626
• github.com/opencontainers/selinux v1.11.0 -> v1.11.1
• github.com/pelletier/go-toml/v2 v2.2.3 new
• github.com/pmezard/go-difflib v1.0.0 -> 5d4384ee4fb2
• github.com/prometheus/client_golang v1.14.0 -> v1.20.5
• github.com/prometheus/client_model v0.3.0 -> v0.6.1
• github.com/prometheus/common v0.37.0 -> v0.55.0
• github.com/prometheus/procfs v0.8.0 -> v0.15.1
• github.com/sirupsen/logrus v1.9.0 -> v1.9.3
• github.com/stefanberger/go-pkcs11uri 78d3cae3a980 -> 78284954bff6
• github.com/stretchr/testify v1.8.2 -> v1.9.0
• github.com/urfave/cli/v2 v2.27.5 new
• github.com/vishvananda/netlink v1.2.1-beta.2 -> v1.3.0
• github.com/vishvananda/netns 2eb08e3e575f -> v0.0.4
• github.com/x448/float16 v0.8.4 new
• github.com/xrash/smetrics 686a1a2994c1 new
• go.etcd.io/bbolt v1.3.7 -> v1.3.11
• go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.40.0 -> v0.56.0
• go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.56.0 new
• go.opentelemetry.io/otel v1.14.0 -> v1.31.0
• go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.14.0 -> v1.31.0
• go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.14.0 -> v1.31.0
• go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.14.0 -> v1.31.0
• go.opentelemetry.io/otel/metric v0.37.0 -> v1.31.0
• go.opentelemetry.io/otel/sdk v1.14.0 -> v1.31.0
• go.opentelemetry.io/otel/trace v1.14.0 -> v1.31.0
• go.opentelemetry.io/proto/otlp v0.19.0 -> v1.3.1
• golang.org/x/crypto v0.1.0 -> v0.28.0
• golang.org/x/exp aacd6d4b4611 new
• golang.org/x/mod v0.7.0 -> v0.21.0
• golang.org/x/net v0.7.0 -> v0.30.0
• golang.org/x/oauth2 v0.4.0 -> v0.22.0
• golang.org/x/sync v0.1.0 -> v0.8.0
• golang.org/x/sys v0.6.0 -> v0.26.0
• golang.org/x/term v0.5.0 -> v0.25.0
• golang.org/x/text v0.7.0 -> v0.19.0
• golang.org/x/time 90d013bbcef8 -> v0.3.0
• google.golang.org/genproto/googleapis/api 5fefd90f89a9 new
• google.golang.org/genproto/googleapis/rpc 5fefd90f89a9 new
• google.golang.org/grpc v1.53.0 -> v1.67.1
• google.golang.org/protobuf v1.28.1 -> v1.35.1
• k8s.io/api v0.26.2 -> v0.31.1
• k8s.io/apimachinery v0.26.2 -> v0.31.1
• k8s.io/apiserver v0.26.2 -> v0.31.1
• k8s.io/client-go v0.26.2 -> v0.31.1
• k8s.io/component-base v0.26.2 -> v0.31.1
• k8s.io/cri-api v0.26.2 -> v0.32.0-alpha.0
• k8s.io/klog/v2 v2.90.1 -> v2.130.1
• k8s.io/kubelet v0.31.1 new
• k8s.io/utils a5ecb0141aa5 -> 18e509b52bc8
• sigs.k8s.io/json f223a00ba0e2 -> bc3834ca7abd
• sigs.k8s.io/structured-merge-diff/v4 v4.2.3 -> v4.4.1
• sigs.k8s.io/yaml v1.3.0 -> v1.4.0
• tags.cncf.io/container-device-interface v0.8.0 new
• tags.cncf.io/container-device-interface/specs-go v0.8.0 new

Previous release can be found at v1.7.0

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.

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.