r815: Docker+Vagrant.

r815/Docker.setup

@@ -0,0 +1,65 @@
+#!/bin/bash
+
+install() {
+    # Install needed software once
+    sudo apt -y install docker.io
+    sudo groupadd docker
+    sudo usermod -aG docker $USER
+    # Logout and login if you were not in group 'docker' before
+    docker run hello-world
+}
+setup() {
+    # Configure the virtual servers
+    mkdir -p my-ubuntu/ ssh/
+    cp ~/.ssh/id_rsa.pub ssh/
+    cat ssh/*.pub > my-ubuntu/authorized_keys
+    cat >my-ubuntu/Dockerfile <<EOF
+FROM ubuntu:bionic
+RUN apt update && \
+    apt install -y openssh-server
+RUN mkdir /root/.ssh
+COPY authorized_keys /root/.ssh/authorized_keys
+# run blocking command which prevents container to exit immediately after start. 
+CMD service ssh start && tail -f /dev/null
+EOF
+    docker build my-ubuntu -t my-ubuntu
+}
+start() {
+    testssh() {
+	ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null root@"$1" echo "'$1'" '`uptime`'
+    }
+    export -f testssh
+    # Start the virtual servers
+    seq 100 |
+	parallel -j0 'docker run -d --rm --name my-ubuntu-{} my-ubuntu; docker inspect my-ubuntu-{}' |
+	# After this it is possible to do:
+	#   ssh 10.0.0.99
+	# from another physical server
+	perl -nE '/"IPAddress": "(\S+)"/ and not $seen{$1}++ and say $1' |
+	parallel testssh
+    docker ps
+}
+stop() {
+    # Stop the virtual servers
+    # After there is no running processes on the host server
+    # and after this it is no longer possible to do:
+    #   ssh 10.0.0.99
+    # from another physical server
+    # The host server returns to the state before running `start`
+    seq 100 | parallel -j0 docker stop my-ubuntu-{}
+    docker ps
+}
+destroy() {
+    # Remove the setup
+    # After this the host server returns to the state before running `setup`
+    rm -rf my-ubuntu/
+    docker rmi my-ubuntu
+}
+
+full() {
+    install
+    setup
+    start
+    stop
+    destroy
+}

r815/SETUP

@@ -2,10 +2,26 @@ UEFI boot does not work, so use legacy boot.
 Installed with ubuntu-20.04-live-server-amd64.iso
 
 ssh-copy-id
-git clone 192.168.1.129:privat/configfiles
-cp configfiles/ubuntu-20.04/home/.* .
-sudo cp configfiles/ubuntu-20.04/home/.* /root
-bash configfiles/ubuntu-20.04/packages
+git clone 192.168.1.129:privat/config
+cp config/ubuntu-20.04/home/.* .
+sudo cp config/ubuntu-20.04/home/.* /root
+bash config/ubuntu-20.04/packages
+
+add_swap() {
+    truncate -s 16T /data/swapfile
+    mkswap swapfile
+    
+
+    mkswap -L swap1 /dev/sdc
+    mkswap -L swap2 /dev/sdd
+    mkswap -L swap3 /dev/sde
+    cat >> /etc/fstab <<_EOF
+LABEL=swap1               none            swap    sw,pri=4          0       0
+LABEL=swap2               none            swap    sw,pri=4          0       0
+LABEL=swap3               none            swap    sw,pri=4          0       0
+_EOF
+}
+
 
 LVM_extend_to_full_disk() {
     lvextend -L +10G /dev/ubuntu-vg/ubuntu-lv

r815/Vagrant.setup

@@ -0,0 +1,70 @@
+install() {
+    # Install needed software once
+    sudo apt install -y vagrant virtualbox
+}
+setup() {
+    # Configure the virtual servers
+    mkdir -p ssh/
+    cp ~/.ssh/id_rsa.pub ssh/
+    cat ssh/*.pub > authorized_keys
+    cat >Vagrantfile <<'EOF'
+Vagrant.configure("2") do |config|
+  config.vm.box = "debian/buster64"
+  config.vm.network "public_network"
+  (1..100).each do |i|
+    config.vm.define "vm%03d" % i do |node|
+      node.vm.hostname = "vm%03d" % i
+      # use the following line to map a range of ports on the host
+      # to the VNC port of each VM:
+      # node.vm.network "forwarded_port", host: 5900+i, guest: 5900
+    end
+  end
+
+  config.vm.provision "shell" do |s|
+    ssh_pub_key = File.readlines("authorized_keys").first.strip
+    s.inline = <<-SHELL
+      mkdir /root/.ssh
+      echo #{ssh_pub_key} >> /home/vagrant/.ssh/authorized_keys
+      echo #{ssh_pub_key} >> /root/.ssh/authorized_keys
+      apt-get update
+      apt-get install -y parallel
+    SHELL
+  end
+end
+EOF
+}
+start() {
+    testssh() {
+	ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null root@"$1" echo "'$1'" '`uptime`'
+    }
+    export -f testssh
+    # Start the virtual servers
+    seq 100 | parallel vagrant up vm{}
+    # After this it is possible to do:
+    #   ssh 10.0.0.99
+    # from another physical server
+    # How do we get the IP-addresses?
+    # parallel testssh
+}
+stop() {
+    # Stop the virtual servers
+    # After there is no running processes on the host server
+    # and after this it is no longer possible to do:
+    #   ssh 10.0.0.99
+    # from another physical server
+    # The host server returns to the state before running `start`
+    vagrant suspend
+}
+destroy() {
+    # Remove the setup
+    # After this the host server returns to the state before running `setup`
+    ?
+}
+
+full() {
+    install
+    setup
+    start
+    stop
+    destroy
+}

r815/etc/default/locale

@@ -0,0 +1 @@
+LANC=C

r815/etc/rc.local

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+set -e
+
+case "$1" in
+    start)
+	loopdev=$(losetup --show -f /data/swapfile)
+	swapon $loopdev
+	;;
+    stop)
+	loopdev=$(losetup -j /data/swapfile | grep -o "/dev/loop[0-9]*")
+	swapoff $loopdev
+	losetup -d $loopdev
+	;;
+    restart)
+	loopdev=$(losetup -j /data/swapfile | grep -o "/dev/loop[0-9]*")
+	swapoff $loopdev
+	swapon $loopdev
+	;;
+    *)
+	echo "Usage: $0 { start | stop | restart }" >&2
+	exit 1
+	;;
+esac

ubuntu-20.04/etc/rc.local

@@ -4,3 +4,5 @@ echo 1 > /sys/module/zswap/parameters/enabled
 echo z3fold > /sys/module/zswap/parameters/zpool
 echo 50 > /sys/module/zswap/parameters/max_pool_percent
 echo lz4 > /sys/module/zswap/parameters/compressor
+grep -R . /sys/kernel/debug/zswap/
+echo 2 > /proc/sys/vm/overcommit_memory

ubuntu-20.04/install-zfs-luks.sh

@@ -32,8 +32,8 @@ partitiondisk() {
     sgdisk --zap-all $DISK
     sgdisk            -n2:1M:+510M     -t2:EF00 $DISK
     sgdisk -a 1048576 -n3:0:+2G        -t3:BF01 $DISK
-    # TODO better way to find the max size rounded to 8192
-    sgdisk -a 1048576 -n4:0:$((1948254208+5242880-1)) -t4:8300 $DISK
+    end_position=$(sgdisk -E $DISK)
+    sgdisk -a 1048576 -n4:0:$(( $end_position - (($end_position + 1) % 2048) )) -t4:BF01 $DISK
     fdisk -l $DISK
     # Needed for partitiontable to be visible
     sleep 5
@@ -65,8 +65,9 @@ setup_zpool_for_root() {
     cryptsetup luksClose luks1
     echo "$password" | cryptsetup -y -v luksFormat --sector-size 4096 \
 				  --pbkdf-parallel 1 \
-				  --pbkdf-memory 4000000 --pbkdf argon2id --iter-time 10000 \
+				  --pbkdf-memory 4000000 --pbkdf argon2id --iter-time 1000 \
 				  ${DISK}-part4
+    cryptsetup config --priority prefer --key-slot 0
     echo "$password" | cryptsetup luksOpen ${DISK}-part4 luks1
     (echo "$password"; echo "$secretpassword") |
 	cryptsetup -y -v luksAddKey \

ubuntu-20.04/packages

@@ -62,6 +62,7 @@ mosh
 psmisc
 #owncloud-client
 htop
+net-tools
 #uswsusp
 #cifs-utils
 #r-base-core
@@ -70,6 +71,8 @@ htop
 libreoffice
 vlc
 iridium
+xkbset
+sox
 #xfce4
 #clusterssh
 ##wine