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47 lines
954 B
Markdown
47 lines
954 B
Markdown
# Swarm mode
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- Since version 1.12, the Docker Engine embeds SwarmKit
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- All the SwarmKit features are "asleep" until you enable "Swarm mode"
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- Examples of Swarm Mode commands:
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- `docker swarm` (enable Swarm mode; join a Swarm; adjust cluster parameters)
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- `docker node` (view nodes; promote/demote managers; manage nodes)
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- `docker service` (create and manage services)
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???
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- The Docker API exposes the same concepts
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- The SwarmKit API is also exposed (on a separate socket)
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---
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## Swarm mode needs to be explicitly activated
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- By default, all this new code is inactive
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- Swarm mode can be enabled, "unlocking" SwarmKit functions
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<br/>(services, out-of-the-box overlay networks, etc.)
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.exercise[
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- Try a Swarm-specific command:
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```bash
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docker node ls
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```
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<!-- Ignore errors: ```wait not a swarm manager``` -->
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]
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--
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You will get an error message:
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```
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Error response from daemon: This node is not a swarm manager. [...]
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```
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