1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
---
title: "Installation"
description: Installation of a gentoo system
tags:
- gentoo
- linux
- UpdateNeeded
---
## Introduction
When installing a gentoo system for the first time, please refer to the wonderfull [gentoo handbook](https://wiki.gentoo.org/wiki/Handbook:AMD64). This page is just installation notes shorthand when you know exactly what you are doing.
## Installation media
You can get a bootable iso or liveusb from https://www.gentoo.org/downloads/. I recommend the minimal one. To create a bootable usb drive juste use `dd` to copy the image on it. Then boot on this brand new installation media.
Once you boot on the installation media, you can start sshd and set a temporary password and proceed with the installation more confortably from another machine :
```sh
/etc/init.d/sshd start
passwd
```
Don't forget to either run `dhcpcd` or manually set an ip and gateway to the machine.
## Partitionning
There are several options depending on wether you need soft raid, full disk encryption or a simple root device with no additional complications. It will also differ if you are using a virtual machine or a physical one.
```sh
tmux
blkdiscard /dev/nvme0n1
sgdisk -n1:0:+2M -t1:EF02 /dev/nvme0n1
sgdisk -n2:0:+512M -t2:EF00 /dev/nvme0n1
sgdisk -n3:0:0 -t3:8300 /dev/nvme0n1
mkfs.fat -F 32 -n efi-boot /dev/nvme0n1p2
mkfs.xfs /dev/nvme0n1p3
mount /dev/sda3 /mnt/gentoo
cd /mnt/gentoo
```
Make sure you do not repeat the mistake I too often make by mounting something to /mnt while using the liveusb/livecd. You will lose your shell if you do this and will need to reboot!
## Get the stage3 and chroot into it
Get the stage 3 installation file from https://www.gentoo.org/downloads/. I personnaly use the non-multilib one from the advanced choices, since I am no longer using and 32bits software except steam, and I use steam from a multilib chroot.
Put the archive on the server in /mnt/gentoo (you can simply wget it from there), then extract it :
```sh
tar xpf stage3-*.tar.xz --xattrs-include='*.*' --numeric-owner
mount /dev/nvme0n1p2 boot
mount -R /proc proc
mount -R /sys sys
mount -R /dev dev
chroot .
```
## Initial configuration
We prepare the local language of the system :
```sh
echo 'LANG="en_US.utf8"' > /etc/env.d/02locale
echo 'en_US.UTF-8 UTF-8' >> /etc/locale.gen
locale-gen
env-update && source /etc/profile
echo 'nameserver 1.1.1.1' > /etc/resolv.conf
```
We set a loop device to hold the portage tree. It will be formatted with optimisation for the many small files that compose it :
```sh
mkdir -p /srv/gentoo-distfiles
truncate -s 10G /portage.img
mke2fs -b 1024 -i 2048 -m 0 -O "dir_index" -F /portage.img
tune2fs -c 0 -i 0 /portage.img
mkdir /usr/portage
mount -o loop,noatime,nodev /portage.img /usr/portage/
```
We set default compilation options and flags. If you are not me and cannot rsync this location, you can browse it from https://packages.adyxax.org/x86-64/etc/portage/ :
```sh
rsync -a --delete packages.adyxax.org:/srv/gentoo-builder/x86-64/etc/portage/ /etc/portage/
sed -i /etc/portage/make.conf -e s/buildpkg/getbinpkg/
echo 'PORTAGE_BINHOST="https://packages.adyxax.org/x86-64/packages/"' >> /etc/portage/make.conf
```
We get the portage tree and sync the timezone
```sh
emerge --sync
```
## Set hostname and timezone
```sh
export HOSTNAME=XXXXX
sed -i /etc/conf.d/hostname -e /hostname=/s/=.*/=\"${HOSTNAME}\"/
echo "Europe/Paris" > /etc/timezone
emerge --config sys-libs/timezone-data
```
## Check cpu flags and compatibility
TODO
```sh
emerge cpuid2cpuflags -1q
cpuid2cpuflags
gcc -### -march=native /usr/include/stdlib.h
```
## Rebuild the system
```sh
emerge --quiet -e @world
emerge --quiet dosfstools app-admin/logrotate app-admin/syslog-ng app-portage/gentoolkit \
dev-vcs/git bird openvpn htop net-analyzer/tcpdump net-misc/bridge-utils \
sys-apps/i2c-tools sys-apps/pciutils sys-apps/usbutils sys-boot/grub sys-fs/ncdu \
sys-process/lsof net-vpn/wireguard-tools
emerge --unmerge nano -q
```
## Grab a working kernel
Next we need to Grab a working kernel from our build server along with its modules. If you don't have one already, you have some work to do!
Check the necessary hardware support with :
```sh
i2cdetect -l
lspci -nnk
lsusb
```
TODO specific page with details on how to build required modules like the nas for example.
```sh
emerge gentoo-sources genkernel -q
...
```
## Final configuration steps
### fstab
```sh
# /etc/fstab: static file system information.
#
#<fs> <mountpoint> <type> <opts> <dump/pass>
/dev/vda3 / ext4 noatime,discard 0 1
/dev/vda2 /boot vfat noatime 1 2
/portage.img /usr/portage ext2 noatime,nodev,loop 0 0
```
### networking
```sh
echo 'hostname="phoenix"' > /etc/conf.d/hostname
echo 'dns_domain_lo="adyxax.org"
config_eth0="192.168.1.3 netmask 255.255.255.0"
routes_eth0="default via 192.168.1.1"' > /etc/conf.d/net
cd /etc/init.d
ln -s net.lo net.eth0
rc-update add net.eth0 boot
```
### Grub
TODO especially the conf in /etc/default/grub when using an encrypted /
In the case of UEFI use something like :
```sh
grub-install --efi-directory=/boot/ /dev/nvme1n1
grub-mkconfig -o /boot/grub/grub.cfg
```
### /etc/hosts
```sh
scp root@collab-jde.nexen.net:/etc/hosts /etc/
```
### root account access
```sh
mkdir -p /root/.ssh
echo ' ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILOJV391WFRYgCVA2plFB8W8sF9LfbzXZOrxqaOrrwco hurricane' > /root/.ssh/authorized_keys
passwd
```
### Add necessary daemons on boot
```sh
rc-update add syslog-ng default
rc-update add cronie default
rc-update add sshd default
```
## TODO
```sh
net-firewall/shorewall
...
rc-update add shorewall default
sed '/PRODUCTS/s/=.*/="shorewall"/' -i /etc/conf.d/shorewall-init
rc-update add shorewall-init boot
net-analyzer/fail2ban
echo '[sshd]
enabled = true
filter = sshd
ignoreip = 127.0.0.1/8 10.1.0.0/24 37.187.103.36 137.74.173.247 90.85.207.113
bantime = 3600
banaction = shorewall
logpath = /var/log/messages
maxretry = 3' > /etc/fail2ban/jail.d/sshd.conf
rc-update add fail2ban default
app-emulation/docker
/etc/docker/daemon.json
{ "iptables": false }
rc-update add docker default
app-emulation/lxd
rc-update add lxd default
```
## References
- http://blog.siphos.be/2013/04/gentoo-protip-using-buildpkgonly/
- https://wiki.gentoo.org/wiki/Genkernel
- https://wiki.gentoo.org/wiki/Kernel/Configuration
- https://wiki.gentoo.org/wiki/Kernel
- https://forums.gentoo.org/viewtopic-t-1076024-start-0.html
- https://wiki.gentoo.org/wiki/Binary_package_guide#Setting_up_a_binary_package_host
|
