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Capistrano vs Docker: What are the differences?
Developers describe Capistrano as "A remote server automation and deployment tool written in Ruby". Capistrano is a remote server automation tool. It supports the scripting and execution of arbitrary tasks, and includes a set of sane-default deployment workflows. On the other hand, Docker is detailed as "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.
Capistrano belongs to "Server Configuration and Automation" category of the tech stack, while Docker can be primarily classified under "Virtual Machine Platforms & Containers".
Some of the features offered by Capistrano are:
- Reliably deploy web application to any number of machines simultaneously, in sequence or as a rolling set
- Automate audits of any number of machines (checking login logs, enumerating uptimes, and/or applying security patches)
- Script arbitrary workflows over SSH
On the other hand, Docker provides the following key features:
- Integrated developer tools
- open, portable images
- shareable, reusable apps
"Automated deployment with several custom recipes" is the primary reason why developers consider Capistrano over the competitors, whereas "Rapid integration and build up" was stated as the key factor in picking Docker.
Capistrano and Docker are both open source tools. It seems that Docker with 54K GitHub stars and 15.6K forks on GitHub has more adoption than Capistrano with 11.1K GitHub stars and 1.71K GitHub forks.
Spotify, Pinterest, and Twitter are some of the popular companies that use Docker, whereas Capistrano is used by Typeform, Bukalapak, and 500px. Docker has a broader approval, being mentioned in 3527 company stacks & 3448 developers stacks; compared to Capistrano, which is listed in 293 company stacks and 81 developer stacks.
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 Capistrano
- Automated deployment with several custom recipes121
- Simple63
- Ruby23
- Release-folders with symlinks11
- Multistage deployment9
- Cryptic syntax2
- Integrated rollback2
- Supports aws1
Pros of Docker
- Rapid integration and build up824
- Isolation692
- Open source521
- Testability and reproducibility505
- Lightweight460
- Standardization218
- Scalable185
- Upgrading / downgrading / application versions106
- Security88
- Private paas environments85
- Portability34
- Limit resource usage26
- Game changer17
- I love the way docker has changed virtualization16
- Fast14
- Concurrency12
- Docker's Compose tools8
- Easy setup6
- Fast and Portable6
- Because its fun5
- Makes shipping to production very simple4
- Highly useful3
- It's dope3
- Its cool2
- MacOS support FAKE2
- Simplicity, isolation, resource effective2
- Open source and highly configurable2
- Does a nice job hogging memory2
- Package the environment with the application2
- Very easy to setup integrate and build2
- HIgh Throughput2
- Docker hub for the FTW2
- Super2
- Asdfd0
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Cons of Capistrano
Cons of Docker
- New versions == broken features8
- Unreliable networking6
- Documentation not always in sync6
- Moves quickly4
- Not Secure3
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