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authorAshley Cui <ashleycui16@gmail.com>2019-09-05 12:34:50 -0400
committerAshley Cui <ashleycui16@gmail.com>2019-09-06 11:15:00 -0400
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mac_client.md
add doc explaining setup for podman on mac in current stage of dev Signed-off-by: Ashley Cui <ashleycui16@gmail.com>
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+# Podman Mac Client tutorial
+
+## What is the Podman Mac Client
+
+First and foremost, the Mac Client is under heavy development. We are working on getting the
+Mac client to be packaged and run for a native-like experience. This is the setup tutorial
+for the Mac client at its current stage of development and packaging.
+
+The purpose of the Mac client for Podman is to allow users to run Podman on a Mac. Since Podman is a Linux
+container engine, The Mac client is actually a version of the [Podman-remote client](remote_client.md),
+edited to that the client side works on a Mac machine, and connects to a Podman "backend" on a Linux
+machine, virtual or physical. The goal is to have a native-like experience when working with the Mac
+client, so the command line interface of the remote client is exactly the same as the regular Podman
+commands with the exception of some flags and commands that do not apply to the Mac client.
+
+## What you need
+
+To use the Mac client, you will need a binary built for MacOS and a Podman "backend" on a Linux machine;
+hereafter referred to as the Podman node. In this context, a Podman node is a Linux system with Podman
+installed on it and the varlink service activated. You will also need to be able to ssh into this
+system as a user with privileges to the varlink socket (more on this later).
+
+For best results, use the most recent version of MacOS
+
+## Getting the Mac client
+The Mac client is available through [Homebrew](https://brew.sh/).
+```
+$ brew cask install podman
+```
+
+## Setting up the client and Podman node connection
+
+To use the Mac client, you must perform some setup on both the Mac and Podman nodes. In this case,
+the Mac node refers to the Mac on which Podman is being run; and the Podman node refers to where
+Podman and its storage reside.
+
+### Connection settings
+Your Linux box must have ssh enabled, and you must copy your Mac's public key from `~/.sconf sh/id.pub` to
+`/root/.ssh/authorized_keys` on your Linux box using `ssh-copy-id` This allows for the use of SSH keys
+for remote access.
+
+You may need to edit your `/etc/ssh/sshd_config` in your Linux machine as follows:
+```
+PermitRootLogin yes
+```
+
+Use of SSH keys are strongly encouraged to ensure a secure login. However, if you wish to avoid ‘logging in’ every
+time you run a Podman command, you may edit your `/etc/ssh/sshd_config` on your Linux machine as follows:
+```
+PasswordAuthentication no
+PermitRootLogin without-password
+```
+
+### Podman node setup
+The Podman node must be running a Linux distribution that supports Podman and must have Podman (not the Mac
+client) installed. You must also have root access to the node. Check if your system uses systemd:
+```
+$cat /proc/1/comm
+systemd
+```
+If it does, then simply start the Podman varlink socket:
+```
+$ sudo systemctl start io.podman.socket
+$ sudo systemctl enable io.podman.socket
+```
+
+If your system cannot use systemd, then you can manually establish the varlink socket with the Podman
+command:
+```
+$ sudo podman --log-level debug varlink --timeout 0 unix://run/podman/io.podman
+```
+
+### Required permissions
+For now, the Mac client requires that you be able to run a privileged Podman and have privileged ssh
+access to the remote system. This limitation is being worked on.
+
+#### Running the remote client
+There are three different ways to pass connection information into the client: flags, conf file, and
+environment variables. All three require information on username and a remote host ip address. Most often,
+your username should be root and you can obtain your remote-host-ip using `ip addr`
+
+To connect using flags, you can use
+```
+$ podman --remote-host remote-host-ip --username root images
+REPOSITORY TAG IMAGE ID CREATED SIZE
+quay.io/podman/stable latest 9c1e323be87f 10 days ago 414 MB
+localhost/test latest 4b8c27c343e1 4 weeks ago 253 MB
+k8s.gcr.io/pause 3.1 da86e6ba6ca1 20 months ago 747 kB
+```
+If the conf file is set up, you may simply use Podman as you would on the linux machine. Take a look at
+[podman-remote.conf.5.md](https://github.com/containers/libpod/blob/master/docs/podman-remote.conf.5.md) on how to use the conf file:
+
+```
+$ podman images
+REPOSITORY TAG IMAGE ID CREATED SIZE
+quay.io/podman/stable latest 9c1e323be87f 10 days ago 414 MB
+localhost/test latest 4b8c27c343e1 4 weeks ago 253 MB
+k8s.gcr.io/pause 3.1 da86e6ba6ca1 20 months ago 747 kB
+```