CODEWITHSUNDEEP
dockeretcd
4m1nh4j1
4m1nh4j1

Reputation: 4356

Docker Swarm with etcd

If Docker in the Swarm mode has a built-in discovery system, what is the advantage of running Swarm mode using another service discovery like etcd ?

Upvotes: 4

Views: 4663

Answers (3)

user9371521
user9371521

Reputation: 11

The Docker Overlay driver has existed since Docker Engine 1.9, and an external K/V store was required to manage state for the network. Docker Engine 1.12 integrated the control plane state into Docker Engine so that an external store is no longer required. Source: https://docker-k8s-lab.readthedocs.io/en/latest/docker/docker-etcd.html

Upvotes: 1

Worp
Worp

Reputation: 1038

One relevant advantage could simply be that you already know how to use it. Docker supports multiple discovery backends in addition to its built-in system, so people who know their way around etcd or consule (which are well established systems) know how to check on information for their swarm setup.

We have this case at our firm and etcd works perfect for us, so we didn't have to work the team into a new technology from scratch.

Upvotes: 0

Etienne Gautier
Etienne Gautier

Reputation: 3227

I'm sure someone could give a more specific answer to this question but in my opinion there are basically no advantages of running Swarm with ETCD instead of running Swarm mode. It has been designed with a built-in orchestration to avoid the use of a tier KV store and facilitate the cluster management which is a good thing.

See https://blog.docker.com/2016/06/docker-1-12-built-in-orchestration/

Upvotes: 1

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