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docs: add note about docker DNS config when using bridge mode (#12229) 

The Docker DNS configuration options are not compatible with a
group-level network in `bridge` mode. Warn users about this in the
Docker task configuration docs.
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Tim Gross 2022-03-08 11:59:20 -05:00 committed by GitHub
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21
website/content/docs/drivers/docker.mdx
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@ -100,13 +100,21 @@ config {
}
```
- `dns_search_domains` - (Optional) A list of DNS search domains for the container
to use.
- `dns_search_domains` - (Optional) A list of DNS search domains for
the container to use. If you are using bridge networking mode with a
`network` block in the task group, you must set all DNS options in
the `network.dns` block instead.
- `dns_options` - (Optional) A list of DNS options for the container to use.
- `dns_options` - (Optional) A list of DNS options for the container
to use. If you are using bridge networking mode with a `network`
block in the task group, you must set all DNS options in the
`network.dns` block instead.
- `dns_servers` - (Optional) A list of DNS servers for the container to use
(e.g. ["8.8.8.8", "8.8.4.4"]). Requires Docker v1.10 or greater.
- `dns_servers` - (Optional) A list of DNS servers for the container
to use (e.g. ["8.8.8.8", "8.8.4.4"]). Requires Docker v1.10 or
greater. If you are using bridge networking mode with a `network`
block in the task group, you must set all DNS options in the
`network.dns` block instead.
- `entrypoint` - (Optional) A string list overriding the image's entrypoint.
@ -257,7 +265,8 @@ config {
the group `network.mode = "bridge"` you should not set the Docker config
`network_mode`, or the container will be unable to reach other containers in
the task group. This will also prevent [Connect]-enabled tasks from reaching
the Envoy sidecar proxy.
the Envoy sidecar proxy. You must also set any DNS options in the `network.dns`
block and not in the task configuration.
If you are in the process of migrating from the default Docker network to
group-wide bridge networking, you may encounter issues preventing your