#references:
#https://nasilemaktech.com/guide-lizardfs-drive-level-redundancy/
#https://marc.xn--wckerlin-0za.ch/computer/run-a-stable-lizardfs
#http://www.micronarrativ.org/2016/2016-lizardfs.html
##############################

#default login after install: root/1234
#change root passwd, configure some local settings
#adduser which will have sudo access

#as user
cat <<EOF > ~/.tmux.conf

# Rebind to Ctrl-a
set -g prefix C-a
unbind C-b
bind a send-prefix
bind C-a last-window
bind '"' choose-window

# Rebind pane splitting
unbind %
bind - split-window -v
bind _ split-window -h

# Set status bar
set -g status-bg colour236
set -g status-fg white
set -g status-left '#[fg=green]#H'

# Highlight active window
setw -g window-status-style fg=cyan,bg=colour164,dim
setw -g window-status-current-style fg=white,bg=red,bright


# Force 256 colors
set -g default-terminal "screen-256color"
EOF
######################

# set auto login ssh public key

mkdir ~/.ssh

echo "ssh-rsa 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 dth@imac27" >> ~/.ssh/authorized_keys

######################
#change to root
sudo -s

#add this to /etc/hosts on every machine:

cat <<EOF >> /etc/hosts
192.168.42.11	filer1
192.168.42.15   cache filer5
192.168.42.62   c2
192.168.42.137  ml2 
192.168.42.138  ms2
192.168.42.139  ml1 
192.168.42.140  ms1  mfsmaster
192.168.42.141  cs1 
192.168.42.142  cs2
192.168.42.143  cs3
192.168.42.144  cs4
192.168.42.145  cs5
192.168.42.146  cs6
192.168.42.147  cs7
192.168.42.148  cs8
192.168.42.149  cs9
192.168.42.150  cs10
192.168.42.151  cs11
192.168.42.152  cs12
EOF
#use cache to speedup download
cat <<EOF >> /etc/apt/apt.conf
Acquire::http::Proxy "http://cache:3142/";
Acquire::https::Proxy "DIRECT";
EOF

apt update
apt -y dist-upgrade
#apt -y install vim  xfsprogs procinfo mosh tmux hdparm hddtemp iperf3 rsync #since bookworm no more hddtemp, use smartctl instead
apt -y install vim  xfsprogs procinfo mosh tmux hdparm smartmontools iperf3 rsync

#remove odroidxu4 reference from /etc/hosts
sed -i "s/odroidxu4//" /etc/hosts

#edit hostname
vi /etc/hostname

#Tuning
mv /etc/sysctl.conf /etc/sysctl.conf.ORIG

cat <<EOF > /etc/sysctl.conf
## ARM Tuning
kernel.printk = 3 4 1 3
vm.min_free_kbytes = 16384
## Out-of-the-box Raspbian Hardening
fs.protected_hardlinks = 1
fs.protected_symlinks = 1
## Out-of-the-box Debian Hardening
vm.mmap_min_addr = 32768
kernel.kptr_restrict = 1
kernel.yama.ptrace_scope = 1
net.ipv4.conf.default.rp_filter=1
net.ipv4.conf.all.rp_filter=1
net.ipv6.conf.all.use_tempaddr = 2
net.ipv6.conf.default.use_tempaddr = 2
## Security / Hardening
kernel.sysrq = 0
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.all.send_redirects = 0
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
net.ipv6.conf.eth0.disable_ipv6 = 1
net.netfilter.nf_conntrack_tcp_loose = 0
## Performance over security
net.ipv4.tcp_syncookies = 0
net.ipv4.tcp_timestamps = 0
## Network Performance
net.ipv4.tcp_window_scaling = 1
net.core.rmem_max = 268435456
net.core.rmem_default = 67108864
net.core.wmem_max = 268435456
net.core.wmem_default = 67108864
net.core.optmem_max = 2097152
net.ipv4.tcp_rmem = 1048576 67108864 268435456
net.ipv4.tcp_wmem = 1048576 67108864 268435456
net.ipv4.tcp_mem = 1048576 67108864 268435456
net.ipv4.udp_mem = 1048576 67108864 268435456
net.core.netdev_max_backlog = 10000
net.ipv4.tcp_no_metrics_save = 1
## Memory / Cache Management
vm.overcommit_memory = 1
# vm.dirty_background_ratio = 3
vm.dirty_ratio = 10
vm.vfs_cache_pressure = 120
EOF

#time synchronisation
cat <<EOF >> /etc/systemd/timesyncd.conf
NTP=192.168.42.1
EOF

timedatectl set-ntp true

#now is a good to reboot to see if login ssh without password works 

############ CHUNK SERVER #########################

apt -y install lizardfs-chunkserver 

#### seperate line, can't combine next line in paste
#enable to auto start it at bootup:
systemctl enable lizardfs-chunkserver

#initialize the disk
#wipe old data <- destructive command !
dd if=/dev/zero of=/dev/sda bs=512 count=4096
#use either parted or gdisk to make GPT partition table
parted --align optimal /dev/sda
mklabel gpt
y
mkpart lizardfs 0% 100%
#control-d to exit parted

#####format with XFS filesystem
#without encryption
#format partition
sudo mkfs.xfs -s size=4k -f /dev/sda1

#find uuid
UUID=$(blkid -o value -s UUID "/dev/sda1")
#blkid -o value -s UUID "/dev/sda1" | tee /tmp/UUID

#make mount point
mkdir -p /chunks/$UUID

#make things right in /etc/fstab
echo "UUID="$UUID" /chunks/"$UUID" xfs rw,noexec,nodev,noatime,nodiratime,largeio,inode64 0 2" >> /etc/fstab

#move config and other files to the new version, for future upgrade
cd /etc
mv lizardfs mfs; ln -s mfs lizardfs

cd /var/lib/
mv lizardfs mfs; ln -s mfs lizardfs

echo 'WORKING_USER = root' >> /etc/mfs/mfschunkserver.cfg
echo 'WORKING_GROUP = root' >> /etc/mfs/mfschunkserver.cfg
echo  "/chunks/"$UUID > /etc/mfs/mfshdd.cfg

------------------------------
XFS enables write barriers by default since kernel version 2.6.17, but they can be disabled using explicit nobarrier. As you can see in your mount output, nobarrier option is not used.
According to XFS FAQ, if write barriers are disabled without the explicit mount option, a log entry is generated. You can check the kernel logs on running system with dmesg.
Kernels after version 4.10 will always perform integrity operations and barrier/nobarrier mount option is ignored (as documented in man 5 xfs).
################## SMARTMONITORING ###########
apt -y install smartmontools
sed -i "s/#start_/start_/" /etc/default/smartmontools
systemctl enable smartmontools

sed -i "s/exit 0//" /etc/rc.local
echo "sleep 10;" >> /etc/rc.local
echo "service lizardfs-chunkserver restart" >> /etc/rc.local
echo "exit 0;" >> /etc/rc.local


############ MASTER SERVER #########################



############ SHADOW MASTER SERVER #########################