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containerd vs Docker: What are the differences?
What is containerd? An industry-standard container runtime with an emphasis on simplicity,robustness and portability. An industry-standard container runtime with an emphasis on simplicity, robustness, and portability.
What is Docker? Enterprise Container Platform for High-Velocity Innovation. The Docker Platform is the industry-leading container platform for continuous, high-velocity innovation, enabling organizations to seamlessly build and share any application — from legacy to what comes next — and securely run them anywhere.
containerd belongs to "Container Tools" category of the tech stack, while Docker can be primarily classified under "Virtual Machine Platforms & Containers".
Some of the features offered by containerd are:
- OCI Image Spec support
- OCI Runtime Spec support (aka runC)
- Image push and pull support
On the other hand, Docker provides the following key features:
- Integrated developer tools
- open, portable images
- shareable, reusable apps
Docker is an open source tool with 54K GitHub stars and 15.6K GitHub forks. Here's a link to Docker's open source repository on GitHub.
lxd/lxc and Docker aren't congruent so this comparison needs a more detailed look; but in short I can say: the lxd-integrated administration of storage including zfs with its snapshot capabilities as well as the system container (multi-process) approach of lxc vs. the limited single-process container approach of Docker is the main reason I chose lxd over Docker.
Pros of containerd
- Supports Kubernetes version greater than 1.212
- No Need for docker shim2
- Needs docker shim to work on kubernetes0
- No kubernetes support after 1.220
Pros of Docker
- Rapid integration and build up824
- Isolation690
- Open source520
- Testability and reproducibility505
- Lightweight459
- Standardization217
- Scalable184
- Upgrading / downgrading / application versions105
- Security87
- Private paas environments84
- Portability33
- Limit resource usage25
- Game changer16
- I love the way docker has changed virtualization15
- Fast13
- Concurrency11
- Docker's Compose tools7
- Easy setup5
- Fast and Portable5
- Because its fun4
- Makes shipping to production very simple3
- It's dope2
- Highly useful2
- HIgh Throughput1
- Very easy to setup integrate and build1
- Package the environment with the application1
- Does a nice job hogging memory1
- Open source and highly configurable1
- Simplicity, isolation, resource effective1
- MacOS support FAKE1
- Its cool1
- Docker hub for the FTW1
- Super1
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Cons of containerd
Cons of Docker
- New versions == broken features8
- Unreliable networking6
- Documentation not always in sync6
- Moves quickly4
- Not Secure3
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What is containerd?
What is Docker?
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