server-scripts/motd.sh

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#!/bin/bash
### Time and date ###
echo -e "$(date)"
echo -e
### Hostname ###
echo -e "$(/usr/bin/env figlet -w $(tput cols) "$(hostname)" | /usr/bin/env lolcat -f -F 0.05 -S $(echo $((0x$(hostname | md5sum | cut -c 1-10))) | cut -c 2-5))"
echo -e
### System info ###
echo -e "$(cat /etc/*release | grep PRETTY_NAME | cut -d = -f 2- | sed 's/\"//g') | Kernel: $(uname -r)
Uptime: $(uptime -p | sed 's/up //')"
### Services ###
# set column width
COLUMNS=1
# colors
green="\e[1;32m"
red="\e[1;31m"
undim="\e[0m"
services=($(cat /.motd.services))
# sort services
#IFS=$'\n' services=($(sort <<<"${services[*]}"))
#unset IFS
service_status=()
# get status of all services
for service in "${services[@]}"; do
service_status+=($(systemctl is-active "$service"))
done
out=""
for i in "${!services[@]}"; do
# color green if service is active, else red
if [[ "${service_status[$i]}" == "active" ]]; then
out+="${services[$i]}:,${green}${service_status[$i]}${undim},"
else
out+="${services[$i]}:,${red}${service_status[$i]}${undim},"
fi
# insert \n every $COLUMNS column
if [ $((($i+1) % $COLUMNS)) -eq 0 ]; then
out+="\n"
fi
done
out+="\n"
printf "\nServices:\n"
printf "$out" | column -ts $',' | sed -e 's/^/ /'
### Docker ###
containers=($(docker ps --format "{{.Image}}/{{.Names}}"))
container_statuses=($(docker ps --format "{{.State}}"))
out=""
for i in ${!containers[@]}; do
if [[ "${container_statuses[$i]}" == "running" ]]; then
out+="${containers[$i]}:,${green}${container_statuses[$i]}${undim},"
else
out+="${containers[$i]}:,${red}${container_statuses[$i]}${undim},"
fi
out+="\n"
done
printf "\nDocker:\n"
printf "$out" | column -ts $',' | sed -e 's/^/ /'
### Disk space ###
# config
max_usage=80
bar_width=50
# colors
white="\e[39m"
green="\e[1;32m"
red="\e[1;31m"
dim="\e[2m"
undim="\e[0m"
# disk usage: ignore zfs, squashfs & tmpfs
DISKS=$(df -H -x squashfs -x tmpfs -x devtmpfs -x zfs --output=target,pcent,size | tail -n+2)
if test $(command -v zpool); then
DISKS+="\n"
DISKS+=$(zpool list -o name,capacity,size | tail -n+2)
fi
printf "\nDisk usage:\n"
while read line; do
if [ -z "$line" ]; then
continuetest
fi
# get disk usage
usage=$(echo "$line" | awk '{print $2}' | sed 's/%//')
used_width=$((($usage*$bar_width)/100))
# color is green if usage < max_usage, else red
if [ "${usage}" -ge "${max_usage}" ]; then
color=$red
else
color=$green
fi
# print green/red bar until used_width
bar="[${color}"
for ((i=0; i<$used_width; i++)); do
bar+="="
done
# print dimmmed bar until end
bar+="${white}${dim}"
for ((i=$used_width; i<$bar_width; i++)); do
bar+="="
done
bar+="${undim}]"
# print usage line & bar
echo "${line}" | awk '{ printf("%-31s%+3s used out of %+4s\n", $1, $2, $3); }' | sed -e 's/^/ /'
echo -e "${bar}" | sed -e 's/^/ /'
done <<< $(echo -e "$DISKS")
### Welcome message ###
LAST_LOGIN=$(last -w --time-format iso | grep $(whoami) | head -2 | tail -1)
echo -e
echo -e "Welcome to $(hostname), $(whoami)!
Last login: $(echo "$LAST_LOGIN" | awk '{for(i=4;i<=NF;i++) print $i}' | paste -sd ' ') from $(echo "$LAST_LOGIN" | awk '{print $3}')"
### ZFS available space warning ###
if test $(command -v zfs); then
POOLS=$(zfs list -o name,used,available -p | tail -n+2)
while read line; do
name=$(echo "$line" | awk '{print $1}')
used=$(echo "$line" | awk '{print $2}')
avail=$(echo "$line" | awk '{print $3}')
percentage=$(echo "scale=2;$avail/($used+$avail)*100" | bc)
if (( $(echo "$percentage < 20" | bc -l) )); then
echo -e "${red}Warning! ${white}$name ${undim}only has ${percentage}% capacity left"
fi
done <<< $(echo -e "$POOLS")
fi