# Installing Wings

Wings is the next generation control daemon from Pterodactyl. This daemon has been rebuilt from the
ground up using Go and lessons learned from our first Nodejs Daemon.

::: danger Not for Production Use
**Wings is not stable and should not be used in a production environment.** Features are subject
to change, important features are missing, and the team has not vetted the performance or
security of the software.
:::

::: warning
You should only install Wings if you are running **Pterodactyl 1.0**. Do not install this software
for previous versions of Pterodactyl. If you have no idea what this means, you probably do not need
to be installing this software.
:::

## Supported Systems
| Operating System | Version | Supported | Notes |
| ---------------- | ------- | :-------: | ----- |
| **Ubuntu** | 18.04 | :white_check_mark: | Documentation written assuming Ubuntu 18.04 as the base OS. |
| | 20.04 | :white_check_mark: | |
| **CentOS** | 7 | :white_check_mark: | |
| | 8 | :white_check_mark: | |
| **Debian** | 9 | :white_check_mark: | |
| | 10 | :white_check_mark: | |

## System Requirements
In order to run the Daemon you will need a system capable of running Docker containers. Most VPS and almost all
dedicated servers should be capable of running Docker, but there are edge cases.

If your provider makes use of `Virtuozzo`, `OpenVZ` (or `OVZ`), or `LXC` then you will most likely be unable to
run the Daemon. If you are unsure what your host is using there are a couple of options. The easiest is to check
their website, or reach out to their support team.

If you want to take a different approach, try using `lscpu` and checking what the virtualization type listed is. An
example of this is shown below which shows my hypervisor running with full virtualization — this means it will
support Docker without issues. If you see `KVM` for the vendor, chances are you're fine as well.

``` bash
dane@daemon:~$ lscpu | grep 'vendor\|type'
Hypervisor vendor:     VMware
Virtualization type:   full
```

If that doesn't work for some reason, or you're still unsure, you can also run the command below and as long as it 
doesn't report `Xen` or `LXC` you're probably okay to continue.

``` bash
dane@daemon:~$ sudo dmidecode -s system-manufacturer
VMware, Inc.
```

## Dependencies
* curl
* Docker

### Installing Docker
For a quick install of Docker CE, you can execute the command below:
``` bash
curl -sSL https://get.docker.com/ | CHANNEL=stable bash
```

If you would rather do a manual installation, please reference the official Docker documentation for how to install Docker CE on your server. Some quick links
are listed below for commonly supported systems.

* [Ubuntu](https://docs.docker.com/install/linux/docker-ce/ubuntu/#install-docker-ce)
* [CentOS](https://docs.docker.com/install/linux/docker-ce/centos/#install-docker-ce)
* [Debian](https://docs.docker.com/install/linux/docker-ce/debian/#install-docker-ce)

::: warning Check your Kernel
Please be aware that some hosts install a modified kernel that does not support important docker features. Please
check your kernel by running `uname -r`. If your kernel ends in `-xxxx-grs-ipv6-64` or `-xxxx-mod-std-ipv6-64` you're
probably using a non-supported kernel. Check our [Kernel Modifications](kernel_modifications.md) guide for details.
:::

#### Start Docker on Boot
If you are on an operating system with systemd (Ubuntu 16+, Debian 8+, CentOS 7+) run the command below to have Docker start when you boot your machine.

``` bash
systemctl enable docker
```

#### Enabling Swap
On most systems, docker will be unable to setup swap space, you can check if this is the case by running `docker info`.
If it outputs `WARNING: No swap limit support` near the bottom, this is the case. Enabling swap is completely optional,
but we recommended doing it if you will be hosting for others, and to prevent OOM errors.

To do so, open `/etc/default/grub` as a root user, and find the line starting with `GRUB_CMDLINE_LINUX_DEFAULT`. Make
sure the line includes `swapaccount=1`.

After doing that, simply run `sudo update-grub` followed by `sudo reboot` to restart the server and have swap enabled.
Below is an example of what the line should look like, _do not copy this line verbatium, it often has additional
OS specific parameters._

``` text
GRUB_CMDLINE_LINUX_DEFAULT="swapaccount=1"
```

## Installing Wings
The first step for installing the daemon is to make sure we have the required directory structure setup. To do so,
run the commands below which will create the base directory and download the wings executable.

``` bash
mkdir -p /etc/pterodactyl
curl -L -o /usr/local/bin/wings https://github.com/pterodactyl/wings/releases/download/v1.0.0-beta.5/wings_linux_amd64
chmod u+x /usr/local/bin/wings
```

::: warning OVH/SYS Servers
If you are using a server provided by OVH or SoYouStart please be aware that your main drive space is probably allocated to
`/home`, and not `/` by default. Please consider using `/home/daemon-data` for server data. This can be easily
set when creating the node.
:::

## Configure Daemon
Once you have installed the daemon and required components, the next step is to create a node on your installed Panel
Once you have done that there will be a tab called Configuration when you view the node.

Simply copy and paste the code block and paste it into a file called `config.yml` in `/etc/pterodactyl` and save it.

![](./../../.vuepress/public/wings_configuration_example.png)

### Starting Wings
To start your daemon simply move into the daemon directory and run the command below which will start the daemon in
foreground mode. Once you are done, use `CTRL+C` to terminate the process. Depending on your server's internet connection
pulling and starting the Daemon for the first time may take a few minutes.

``` bash
sudo wings
```

You may optionally add the `--debug` flag to run Wings in debug mode.

### Daemonizing (using systemd)
Running Pterodactyl Daemon in the background is a simple task, just make sure that it runs without errors before doing
this. Place the contents below in a file called `wings.service` in the `/etc/systemd/system` directory.

``` text
[Unit]
Description=Pterodactyl Wings Daemon
After=docker.service

[Service]
User=root
WorkingDirectory=/etc/pterodactyl
LimitNOFILE=4096
PIDFile=/var/run/wings/daemon.pid
ExecStart=/usr/local/bin/wings
Restart=on-failure
StartLimitInterval=600

[Install]
WantedBy=multi-user.target
```

Then, run the commands below to reload systemd and start the daemon.

``` bash
systemctl enable --now wings
```