Consul vs Docker Swarm: What are the differences?
Developers describe Consul as "A tool for service discovery, monitoring and configuration". Consul is a tool for service discovery and configuration. Consul is distributed, highly available, and extremely scalable. On the other hand, Docker Swarm is detailed as "Native clustering for Docker. Turn a pool of Docker hosts into a single, virtual host". Swarm serves the standard Docker API, so any tool which already communicates with a Docker daemon can use Swarm to transparently scale to multiple hosts: Dokku, Compose, Krane, Deis, DockerUI, Shipyard, Drone, Jenkins... and, of course, the Docker client itself.
Consul can be classified as a tool in the "Open Source Service Discovery" category, while Docker Swarm is grouped under "Container Tools".
"Great service discovery infrastructure" is the primary reason why developers consider Consul over the competitors, whereas "Docker friendly" was stated as the key factor in picking Docker Swarm.
Consul and Docker Swarm are both open source tools. Consul with 16.2K GitHub stars and 2.82K forks on GitHub appears to be more popular than Docker Swarm with 5.61K GitHub stars and 1.11K GitHub forks.
Slack, SendGrid, and Oscar Health are some of the popular companies that use Consul, whereas Docker Swarm is used by Bugsnag, Docker, and Dial Once. Consul has a broader approval, being mentioned in 131 company stacks & 52 developers stacks; compared to Docker Swarm, which is listed in 80 company stacks and 38 developer stacks.
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