# Arch Linux installation to serve as a docker host

###### guide by example

![logo](https://i.imgur.com/SkENpGn.png)

# Purpose

Linux that will run docker.

This is not a hand hodling guide how to install arch.</br>
It's more of a what to do if you already done it
and know what you are doing.</br>
Google for plenty of tutorials and youtube videos alongside arch wiki.

* [Official site](https://www.archlinux.org/)
* [Arch wiki install guide](https://wiki.archlinux.org/index.php/installation_guide)
* [Arch wiki docker entry](https://wiki.archlinux.org/index.php/docker)

# Files and directory structure

```
/home/
└── bastard/
    └── docker/
        ├── container-setup #1
        ├── container-setup #2
        ├── ...
```

# Make installation usb

[wiki](https://wiki.archlinux.org/index.php/USB_flash_installation_media)

`sudo dd bs=4M if=archlinux-2020.05.01-x86_64.iso of=/dev/sdX status=progress oflag=direct`

The above command will fuck your machine up if you dunno what you are doing.

# Boot from the usb

This is BIOS/MBR setup as I am running on an old thinkpad with a busted screen,
plus I like the simplicity of it.</br>
So if theres boot menu option choose non-uefi.

# Installation 

* create a single partition and mark it bootable</br>
  `cfdisk /dev/sda`
* build ext4 filesystem on it</br>
  `mkfs.ext4 /dev/sda1`
* mount the new partition</br>
  `mount /dev/sda1 /mnt`
* choose geographicly close mirror, ctrl+k deletes a line in nano</br>
  `nano /etc/pacman.d/mirrorlist` 
* install the base system </br>
  `pacstrap /mnt base linux linux-firmware base-devel grub dhcpcd nano`
* gnerate fstab</br>
  `genfstab -U /mnt > /mnt/etc/fstab`
* chroot in to the new system</br>
  `arch-chroot /mnt`
* install grub</br>
  `grub-install /dev/sda`</br>
  `grub-mkconfig -o /boot/grub/grub.cfg`
* remove the bootable media and restart the machine</br>
  `exit`</br>
  `reboot`

# Basic configuration after the first boot

* login as `root`</br>
* set password for root</br>
  `passwd`
* set hostname</br>
  `echo docker-host > /etc/hostname`
* add new user and set their password</br>
  `useradd -m -G wheel bastard`</br>
  `passwd bastard`
* edit sudoers to allow users of the group wheel to sudo</br>
  `EDITOR=nano visudo`</br>
  *%wheel ALL=(ALL) ALL*
* check the network interface name</br>
  `ip link`
* enable aquiring dynamic IP</br>
  `systemctl enable --now dhcpcd@enp0s25`
* uncomment desidred locales in locale.gen</br>
  `nano /etc/locale.gen`</br>
* generate new locales and set one system wide</br>
  `locale-gen`</br>
  `localectl set-locale LANG=en_US.UTF-8`
* select timezone and set it permanent</br>
  `tzselect`</br>
  `timedatectl set-timezone 'Europe/Bratislava'`
* set hardware clock and sync using ntp</br>
  `hwclock --systohc --utc`</br>
  `timedatectl set-ntp true`
* setup a swap file</br>
  `fallocate -l 8G /swapfile`</br>
  `chmod 600 /swapfile`</br>
  `mkswap /swapfile`</br>
  `nano /etc/fstab`</br>
  */swapfile none swap defaults 0 0*
* reboot</br>
  `reboot`

# SSH, ZSH, Docker, AUR

From now on its login as non-root user.

### Setup SSH access

[wiki](https://wiki.archlinux.org/index.php/OpenSSH)

* install openssh package</br>
  `sudo pacman -S openssh`
* edit sshd_config</br>
  `sudo nano /etc/ssh/sshd_config`</br>
  *PermitRootLogin prohibit-password*</br>
  *PasswordAuthentication yes*
* enable sshd service</br>
  `sudo systemctl enable --now sshd`

### ZSH shell

[wiki](https://wiki.archlinux.org/index.php/zsh)

I like [Zim](https://github.com/zimfw/zimfw),
it's the fastest zsh framework and out of the box setup nicely

* install zsh and curl packages</br>
  `sudo pacman -S zsh curl`
* install zim, it changes users default shell to zsh</br>
  `curl -fsSL https://raw.githubusercontent.com/zimfw/install/master/install.zsh | zsh`

##### Adding stuff to .zshrc

`export EDITOR=nano`

for ctrl+f prepending sudo

```bash
add_sudo (){
    BUFFER="sudo $BUFFER"
    zle -w end-of-line
}
zle -N add_sudo
bindkey "^f" add_sudo
```

### Setup docker

[Wiki](https://wiki.archlinux.org/index.php/docker)

* have `docker` and `docker-compose` packages installed</br>
  `sudo pacman -S docker docker-compose`
* enable docker service</br>
  `sudo systemctl enable --now docker`
* add non-root user to the docker group</br>
  `sudo gpasswd -a bastard docker`

### Access to AUR

Using [Yay](https://github.com/Jguer/yay).

* install git package</br>
  `sudo pacman -S git`
* install yay</br>
  `git clone https://aur.archlinux.org/yay-bin.git`</br>
  `cd yay-bin && makepkg -si`</br>
  `cd .. && rm -rf yay-bin`</br>

`ctop` and `inxi` are good AUR packages.

# Extra stuff

[wiki - general general recommendations](https://wiki.archlinux.org/index.php/general_recommendations)</br>
[wiki - improving performance](https://wiki.archlinux.org/index.php/Improving_performance)</br>

### Some packages

Tools 

* `sudo pacman -S fuse curl wget vim nnn bind-tools borg python-llfuse`

Monitoring and testing

* `sudo pacman -S htop lm_sensors iotop nload powertop iproute2`

### Performance and maintenance

* install cron and enable the service</br>
  `sudo pacman -S cronie`</br>
  `sudo systemctl enable --now cronie`
* if ssd, enable periodic trim</br>
  `sudo pacman -S util-linux`</br>
  `sudo systemctl enable --now fstrim.timer`
* set noatime in fstab to prevent unnecessary keep of read times</br>
  `sudo nano /etc/fstab`</br>
  *UUID=cdd..addb / ext4 rw,noatime 0 1*
* enable use of all cpu cores for makepkg jobs and disable compression</br>
  `sudo nano /etc/makepkg`</br>
  *MAKEFLAGS="-j$(nproc)"*</br>
  *PKGEXT='.pkg.tar'*
* clean up old packages weekly, keep last 3</br>
  `sudo pacman -S pacman-contrib`</br>
  `sudo systemctl enable --now paccache.timer`
* use reflector to get the fastes mirrors based on country `-c <country code>`</br>
  `sudo pacman -S reflector`</br>
  `sudo reflector -l 200 -n 20 -c SK -c CZ -p http --sort rate --save /etc/pacman.d/mirrorlist`

### Comfort

* enable colors in pacman.conf</br>
  `sudo nano /etc/pacman.conf`</br>
  *Color*