ubuntu

basic configuration

basic configuration

screen

vim /etc/screenrc
hardstatus string "%h%? users: %u%?"
startup_message off
hardstatus alwayslastline "hetzner03: %-Lw%{= BW}%50>%n%f*   %t%{-}%+Lw%<"
bindkey -k k7 prev
bindkey -k k8 next
basic configuration

network

The following method allows to change the name of interfaces in ubuntu. The network card below some how is not good recogized by default, one interface is named renameX by default. With this method I assign it the name enp1s0 by configuration.

First I get all mac addesses of my interfaces

ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: rename2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:07:43:0c:32:12 brd ff:ff:ff:ff:ff:ff
3: enp130s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:07:43:0c:32:13 brd ff:ff:ff:ff:ff:ff
    inet 10.7.10.70/24 brd 10.7.10.255 scope global dynamic enp130s0
       valid_lft 5639sec preferred_lft 5639sec
    inet6 fe80::207:43ff:fe0c:3213/64 scope link 
       valid_lft forever preferred_lft forever

Then I enable the feature in the grub configuration to set my own interface names.

vim /etc/default/grub
GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0"

Apply the new configuration

grub-mkconfig -o /boot/grub/grub.cfg
update-grub
update-initramfs -u

Configure the new names per mac address

vim /etc/udev/rules.d/70-persistent-net.rules
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:07:43:0c:32:12", NAME="enp1s0"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:07:43:0c:32:13", NAME="enp2s0"
basic configuration

nameserver

In my LAN I want to make use of the DNS of my OPNsense router, there for I change the setup of ubuntu to use if via the following configuration.

systemctl stop systemd-resolved 
systemctl disable systemd-resolved 
vim /etc/resolv.conf
search home 
nameserver 10.7.10.254
basic configuration

wipe hdd

wipefs -a /dev/sda
basic configuration

time synchronization

apt install ntp ntpdate -y
mv /etc/ntp.conf /etc/ntp.conf.orig
vim /etc/ntp.conf
server 10.8.10.254 prefer iburst
timedatectl set-ntp no
service ntp restart
ntpq -p
ntpdate 10.8.10.254
basic configuration

lvm

Check the physical volumes

pvs
  PV         VG        Fmt  Attr PSize  PFree
  /dev/sda3  ubuntu-vg lvm2 a--  <2.73t    0  

Check the volume groups

vgs
  VG        #PV #LV #SN Attr   VSize  VFree
  ubuntu-vg   1   2   0 wz--n- <2.73t    0

Check the logical volumes

lvs
  LV        VG        Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  plot01    ubuntu-vg -wi-ao----   2.53t                                                    
  ubuntu-lv ubuntu-vg -wi-ao---- 200.00g   

Display volume group details

vgdisplay
  --- Volume group ---
  VG Name               ubuntu-vg
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <2.73 TiB
  PE Size               4.00 MiB
  Total PE              715140
  Alloc PE / Size       715140 / <2.73 TiB
  Free  PE / Size       0 / 0   
  VG UUID               rY8uzZ-2Xrc-TdNR-lOWt-Fr4O-uAKY-H0UsRs

Create the additional logical volume

lvcreate -l 663940 -n plot01 ubuntu-vg

Create filesystem

mkfs.ext4 /dev/ubuntu-vg/plot01

Get the new UUID

blkid
/dev/mapper/ubuntu--vg-plot01: UUID="3107980c-8ee0-4f63-adeb-2d0f50fe2f5c" TYPE="ext4"

Add it to fstab

vim /etc/fstab
UUID=3107980c-8ee0-4f63-adeb-2d0f50fe2f5c /home/chia/chia/chia-blockchain/plot01 ext4  errors=remount-ro        0       1

ansible

Install basic dependencies for ansible

apt update && apt upgrade -y && apt autoremove -y && reboot
apt update
apt install software-properties-common -y
apt-add-repository --yes --update ppa:ansible/ansible
apt install python-argcomplete
vim /etc/ansible/hosts

Add the following configuration to your /etc/asible/hosts file.

[master]
apu03.home

[k8s]
apu[03:06].home

[nodes]
apu[04:06].home

[k8s:vars]
ansible_python_interpreter=/usr/bin/python3

Add an ansible user

useradd -m ansible

With group ansible and sudo allowance

usermod -a -G sudo ansible

Switch to the user

su - ansible

Start bash

bash

Create an ssh key

ssh-keygen

Give the user ansible the bash shell as default

usermod --shell /bin/bash ansible

Allow to sudo without password from the ansible user

echo "ansible ALL = (root) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/ansible
sudo chmod 0440 /etc/sudoers.d/ansible

Copy the public ssh key of the ansible user

vim .ssh/id_rsa.pub

Add it on all nodes as authorized key

mkdir .ssh
vim .ssh/authorized_keys

Find my first playbook on github

icedtea

Install icedtea

sudo add-apt-repository ppa:maarten-fonville/ppa
sudo apt-get update
sudo apt-get install icedtea-8-plugin

https://askubuntu.com/questions/491995/icedtea-plugin-for-openjdk-8

rclone

apt install unzip fuse networkd-dispatcher -y
curl https://rclone.org/install.sh | sudo bash
vim /etc/fuse.conf
user_allow_other
vim /etc/networkd-dispatcher/routable.d/rclone.sh
#!/bin/bash
  
echo " Network is up"

runuser -l  cloud -c '/home/cloud/.startup/rclone'

chia

chia

plotman

sudo apt install python3-pip python3-testresources -y
pip install --force-reinstall git+https://github.com/ericaltendorf/plotman@main

Restart session after, since the binary might not yet be in path.