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Add info on ssh agent usage (#10184) 

* Add info on ssh agent usage

* moved instructions to the networking topic

* address review comments

* removed an extra line in the faq
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Usha Mandya 2020-01-30 17:24:37 +00:00 committed by GitHub
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4
docker-for-mac/faqs.md
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@ -76,6 +76,10 @@ We recommend that you publish a port, or connect from another container. You can
For more information and examples, see
[I want to connect to a container from the Mac](networking.md#i-want-to-connect-to-a-container-from-the-mac) in the [Networking](/docker-for-mac/networking/) topic.
### Can I use an SSH agent inside a container?
Yes, you can use the host’s SSH agent inside a container. For more information, see [SSH agent forwarding](/docker-for-mac/osxfs/#ssh-agent-forwarding).
### How do I add custom CA certificates?
Docker Desktop supports all trusted certificate authorities (CAs) (root or intermediate). For more information on adding server and client side certs, see

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docker-for-mac/networking.md
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@ -41,7 +41,7 @@ syntax for `-p` is `HOST_PORT:CLIENT_PORT`.
### HTTP/HTTPS Proxy Support
See [Proxies](index#proxies).
See [Proxies](/docker-for-mac/index/#proxies).
## Known limitations, use cases, and workarounds

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docker-for-mac/osxfs.md
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@ -153,6 +153,32 @@ Extended attributes are not yet supported.
`osxfs` does not use OSXFUSE. `osxfs` does not run under, inside, or
between macOS userspace processes and the macOS kernel.
### SSH agent forwarding
Docker Desktop for Mac allows you to use the host’s SSH agent inside a container. To do this:
1. Bind mount the SSH agent socket by adding the following parameter to your `docker run` command:
`--mount type=bind,src=/run/host-services/ssh-auth.sock,target=/run/host-services/ssh-auth.sock`
1. Add the `SSH_AUTH_SOCK` environment variable in your container:
`-e SSH_AUTH_SOCK="/run/host-services/ssh-auth.sock"`
To enable the SSH agent in Docker Compose, add the following flags to your service:
```yaml
services:
web:
image: nginx:alpine
volumes:
- type: bind
source: /run/host-services/ssh-auth.sock
target: /run/host-services/ssh-auth.sock
environment:
- SSH_AUTH_SOCK=/run/host-services/ssh-auth.sock
```
### Performance issues, solutions, and roadmap
> See **[Performance tuning for volume mounts (shared filesystems)](osxfs-caching.md)**