Try our Chrome extension
Easily add the current web-page from your browser directly into your changedetection.io tool, more great features coming soon!
Chrome Webstore
Changedetection.io needs your support!
You can help us by supporting changedetection.io on these platforms;
- Rate us at AlternativeTo.net
- Star us on GitHub
- Follow us at Twitter/X
- G2 Software reviews
- Check us out on LinkedIn
- And tell your friends and colleagues :)
The more popular changedetection.io is, the more time we can dedicate to adding amazing features!
Many thanks :)
changedetection.io team
Not yet seconds ago
False
Not yet seconds ago
Triggered text Ignored text Blocked text
13 hours ago
Skip to content
Navigation Menu
Sign in Appearance settings
* Platform
+ AI CODE CREATION
o GitHub Copilot Write better code with AI
o GitHub Copilot app Direct agents from issue to merge
o MCP Registry Integrate external tools
+ DEVELOPER WORKFLOWS
o Actions Automate any workflow
o Codespaces Instant dev environments
o Issues Plan and track work
o Code Review Manage code changes
o Code Quality Enforce quality at merge
+ APPLICATION SECURITY
o GitHub Advanced Security Find and fix vulnerabilities
o Code security Secure your code as you build
o Secret protection Stop leaks before they start
+ EXPLORE
o Why GitHub
o Documentation
o Blog
o Changelog
o Marketplace
View all features
* Solutions
+ BY COMPANY SIZE
o Enterprises
o Small and medium teams
o Startups
o Nonprofits
+ BY USE CASE
o App Modernization
o DevSecOps
o DevOps
o CI/CD
o View all use cases
+ BY INDUSTRY
o Healthcare
o Financial services
o Manufacturing
o Government
o View all industries
View all solutions
* Resources
+ EXPLORE BY TOPIC
o AI
o Software Development
o DevOps
o Security
o View all topics
+ EXPLORE BY TYPE
o Customer stories
o Events & webinars
o Ebooks & reports
o Business insights
o GitHub Skills
+ SUPPORT & SERVICES
o Documentation
o Customer support
o Community forum
o Trust center
o Partners
View all resources
* Open Source
+ COMMUNITY
o GitHub Sponsors Fund open source developers
+ PROGRAMS
o Security Lab
o Maintainer Community
o Accelerator
o GitHub Stars
o Archive Program
+ REPOSITORIES
o Topics
o Trending
o Collections
* Enterprise
+ ENTERPRISE SOLUTIONS
o Enterprise platform AI-powered developer platform
+ AVAILABLE ADD-ONS
o GitHub Advanced Security Enterprise-grade security features
o Copilot for Business Enterprise-grade AI features
o Premium Support Enterprise-grade 24/7 support
* Pricing
Type / to search
Sign in
Sign up Appearance settings
You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session. Dismiss alert
Uh oh!
There was an error while loading. Please reload this page.
containerd / containerd Public
* Notifications You must be signed in to change notification settings
* Fork 4.1k
* Star 21.1k
* Code
* Issues 226
* Pull requests 272
* Discussions
* Actions
* Projects
* Security and quality 25
* Insights
Additional navigation options
* Code
* Issues
* Pull requests
* Discussions
* Actions
* Projects
* Security and quality
* Insights
main
Branches Tags
Go to file
Code
Open more actions menu
Folders and files
Name Name Last commit message Last commit date
Latest commit
History
17,099 Commits
17,099 Commits
.devcontainer .devcontainer
.github .github
api api
client client
cluster cluster
cmd cmd
contrib contrib
core core
defaults defaults
docs docs
integration integration
internal internal
pkg pkg
plugins plugins
releases releases
script script
test test
vendor vendor
version version
.gitattributes .gitattributes
.gitignore .gitignore
.golangci.yml .golangci.yml
.lycheeignore .lycheeignore
.mailmap .mailmap
ADOPTERS.md ADOPTERS.md
BUILDING.md BUILDING.md
CONTRIBUTING.md CONTRIBUTING.md
LICENSE LICENSE
Makefile Makefile
Makefile.darwin Makefile.darwin
Makefile.freebsd Makefile.freebsd
Makefile.linux Makefile.linux
Makefile.windows Makefile.windows
NOTICE NOTICE
README.md README.md
RELEASES.md RELEASES.md
ROADMAP.md ROADMAP.md
SCOPE.md SCOPE.md
code-of-conduct.md code-of-conduct.md
codecov.yml codecov.yml
containerd.service containerd.service
go.mod go.mod
go.sum go.sum
View all files
Repository files navigation
*
* README
* Code of conduct
* Contributing
* Apache-2.0 license
* Security
More items
containerd is an industry-standard container runtime with an emphasis on simplicity, robustness, and portability. It is available as a daemon for Linux and Windows, which can manage the complete container lifecycle of its host system: image transfer and storage, container execution and supervision, low-level storage and network attachments, etc.
containerd is a member of CNCF with 'graduated' status.
containerd is designed to be embedded into a larger system, rather than being used directly by developers or end-users.
Announcements
Now Recruiting
We are a large inclusive OSS project that is welcoming help of any kind shape or form:
* Documentation help is needed to make the product easier to consume and extend.
* We need OSS community outreach/organizing help to get the word out; manage and create messaging and educational content; and help with social media, community forums/groups, and google groups.
* We are actively inviting new security advisors to join the team.
* New subprojects are being created, core and non-core that could use additional development help.
* Each of the containerd projects has a list of issues currently being worked on or that need help resolving.
+ If the issue has not already been assigned to someone or has not made recent progress, and you are interested, please inquire.
+ If you are interested in starting with a smaller/beginner-level issue, look for issues with an exp/beginner tag, for example containerd/containerd beginner issues.
Getting Started
See our documentation on containerd.io:
* for ops and admins
* namespaces
* client options
To get started contributing to containerd, see CONTRIBUTING.
If you are interested in trying out containerd see our example at Getting Started.
Nightly builds
There are nightly builds available for download here. Binaries are generated from main branch every night for Linux and Windows.
Please be aware: nightly builds might have critical bugs, it's not recommended for use in production and no support provided.
Kubernetes (k8s) CI Dashboard Group
The k8s CI dashboard group for containerd contains test results regarding the health of kubernetes when run against main and a number of containerd release branches.
* containerd-periodics
Runtime Requirements
Runtime requirements for containerd are very minimal. Most interactions with the Linux and Windows container feature sets are handled via runc and/or OS-specific libraries (e.g. hcsshim for Microsoft). The current required version of runc is described in RUNC.md.
There are specific features used by containerd core code and snapshotters that will require a minimum kernel version on Linux. With the understood caveat of distro kernel versioning, a reasonable starting point for Linux is a minimum 4.x kernel version.
The overlay filesystem snapshotter, used by default, uses features that were finalized in the 4.x kernel series. If you choose to use btrfs, there may be more flexibility in kernel version (minimum recommended is 3.18), but will require the btrfs kernel module and btrfs tools to be installed on your Linux distribution.
To use Linux checkpoint and restore features, you will need criu installed on your system. See more details in Checkpoint and Restore.
Build requirements for developers are listed in BUILDING.
Supported Registries
Any registry which is compliant with the OCI Distribution Specification is supported by containerd.
For configuring registries, see registry host configuration documentation
Features
For a detailed overview of containerd's core concepts and the features it supports, please refer to the FEATURES.MD document.
Releases and API Stability
Please see RELEASES.md for details on versioning and stability of containerd components.
Downloadable 64-bit Intel/AMD binaries of all official releases are available on our releases page. Binaries are published for additional platforms as well; see Platform Support for the full list of platforms and the level of support for each.
For other architectures and distribution support, you will find that many Linux distributions package their own containerd and provide it across several architectures, such as Canonical's Ubuntu packaging.
Enabling command auto-completion
Starting with containerd 1.4, the urfave client feature for auto-creation of bash and zsh autocompletion data is enabled. To use the autocomplete feature in a bash shell for example, source the autocomplete/ctr file in your .bashrc, or manually like:
$ source ./contrib/autocomplete/ctr
Distribution of ctr autocomplete for bash and zsh
For bash, copy the contrib/autocomplete/ctr script into /etc/bash_completion.d/ and rename it to ctr. The zsh_autocomplete file is also available and can be used similarly for zsh users.
Provide documentation to users to source this file into their shell if you don't place the autocomplete file in a location where it is automatically loaded for the user's shell environment.
CRI
cri is a containerd plugin implementation of the Kubernetes container runtime interface (CRI). With it, you are able to use containerd as the container runtime for a Kubernetes cluster.
CRI Status
cri is a native plugin of containerd. Since containerd 1.1, the cri plugin is built into the release binaries and enabled by default.
The cri plugin has reached GA status, representing that it is:
* Feature complete
* Works with Kubernetes 1.10 and above
* Passes all CRI validation tests.
* Passes all node e2e tests.
* Passes all e2e tests.
See results on the containerd k8s test dashboard
Validating Your cri Setup
A Kubernetes incubator project, cri-tools, includes programs for exercising CRI implementations. More importantly, cri-tools includes the program critest which is used for running CRI Validation Testing.
CRI Guides
* Installing with Ansible and Kubeadm
* For Non-Ansible Users, Performing a Custom Installation Using the Release Tarball and Kubeadm
* CRI Plugin Testing Guide
* Debugging Pods, Containers, and Images with crictl
* Configuring cri Plugins
* Configuring containerd
Communication
For async communication and long-running discussions please use issues and pull requests on the GitHub repo. This will be the best place to discuss design and implementation.
For sync communication catch us in the #containerd and #containerd-dev Slack channels on Cloud Native Computing Foundation's (CNCF) Slack - cloud-native.slack.com. Everyone is welcome to join and chat. Get Invite to CNCF Slack.
Join our next community meeting hosted on Zoom. The schedule is posted on the CNCF Calendar (search 'containerd' to filter).
Security audit
Security audits for the containerd project are hosted on our website. Please see the security page at containerd.io for more information.
Reporting security issues
Please follow the instructions at containerd/project
Licenses
The containerd codebase is released under the Apache 2.0 license. The README.md file and files in the "docs" folder are licensed under the Creative Commons Attribution 4.0 International License. You may obtain a copy of the license, titled CC-BY-4.0, at http://creativecommons.org/licenses/by/4.0/.
Project details
containerd is the primary open source project within the broader containerd GitHub organization. However, all projects within the repo have common maintainership, governance, and contributing guidelines which are stored in a project repository commonly for all containerd projects.
Please find all these core project documents, including the:
* Project governance,
* Maintainers,
* and Contributing guidelines
information in our containerd/project repository.
Adoption
Interested to see who is using containerd? Are you using containerd in a project? Please add yourself via pull request to our ADOPTERS.md file.
About
An open and reliable container runtime
containerd.io
Topics
cncfcontainerdcontainerscridockerhacktoberfestkubernetesoci
Resources
Readme
Apache-2.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
21.1k stars
Watchers
322 watching
Forks
4.1k forks
Report repository
Releases
Packages
Used by
Contributors
Languages
Footer
© 2026 GitHub, Inc.
Footer navigation
* Terms
* Privacy
* Security
* Status
* Community
* Docs
* Contact
* Manage cookies
* Do not share my personal information
You can’t perform that action at this time.
For now, Differences are performed on text, not graphically, only the latest screenshot is available.
Screenshot requires a Content Fetcher ( Sockpuppetbrowser, selenium, etc ) that supports screenshots.