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container.training/slides/swarm/hostingregistry.md
Jerome Petazzoni fadecd52ee Replace registry:2 with registry
registry used to be registry v1, but now it defaults to v2.
We can therefore drop the tag.
2018-09-28 18:36:29 -05:00

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# Hosting our own registry
- We need to run a `registry` container
- It will store images and layers to the local filesystem
<br/>(but you can add a config file to use S3, Swift, etc.)
- Docker *requires* TLS when communicating with the registry
- unless for registries on `127.0.0.0/8` (i.e. `localhost`)
- or with the Engine flag `--insecure-registry`
<!-- -->
- Our strategy: publish the registry container on port 5000,
<br/>so that it's available through `127.0.0.1:5000` on each node
---
## Deploying the registry
- We will create a single-instance service, publishing its port
on the whole cluster
.exercise[
- Create the registry service:
```bash
docker service create --name registry --publish 5000:5000 registry
```
- Now try the following command; it should return `{"repositories":[]}`:
```bash
curl 127.0.0.1:5000/v2/_catalog
```
]