90 lines
3 KiB
Nix
90 lines
3 KiB
Nix
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{ config, lib, pkgs, ... }:
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let
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motd =
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pkgs.writeShellScriptBin "motd" ''
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#!/usr/bin/env bash
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RED="\e[31m"
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GREEN="\e[32m"
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YELLOW="\e[33m"
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BOLD="\e[1m"
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ENDCOLOR="\e[0m"
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case "$(date +'%H')" in
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[0-9]|1[0-1])
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TIME="morning"
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;;
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1[2-7])
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TIME="afternoon"
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;;
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*)
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TIME="evening"
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;;
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esac
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UPTIME=$(cat /proc/uptime | cut -f1 -d.)
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UPDAYS=$((UPTIME/60/60/24))
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UPHOURS=$((UPTIME/60/60%24))
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UPMINS=$((UPTIME/60%60))
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UPSECS=$((UPTIME%60))
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MEMORY=$(free -m | awk 'NR == 2 { printf "%s/%sMB (%.2f%%)\n", $3, $2, ($3 * 100) / $2 }')
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SERVICES=$(systemctl list-units | grep -P 'podman-|${lib.strings.concatStringsSep "|" config.motd.servicesToCheck}')
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printf "\n"
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printf "''${BOLD}Good $TIME $(whoami), welcome to $(hostname)!$ENDCOLOR\n"
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printf "\n"
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${lib.strings.concatStrings (lib.lists.forEach config.motd.networkInterfaces (x:
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"printf \"$BOLD * %-20s$ENDCOLOR %s\\n\" \"IPv4 ${x}\" \"$(ip -4 addr show ${x} | grep -oP '(?<=inet\\s)\\d+(\\.\\d+){3}')\"\n"
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))}
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printf "$BOLD * %-20s$ENDCOLOR %s\n" "Release" "$(awk -F= '/PRETTY_NAME/ { print $2 }' /etc/os-release | tr -d '"')"
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printf "$BOLD * %-20s$ENDCOLOR %s\n" "Kernel" "$(uname -rs)"
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printf "\n"
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printf "$BOLD * %-20s$ENDCOLOR %s\n" "CPU Usage" "$(awk '{ print $1 ", " $2 ", " $3 }' /proc/loadavg) (1, 5, 15 min)"
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printf "$BOLD * %-20s$ENDCOLOR %s\n" "Memory" "$MEMORY"
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printf "$BOLD * %-20s$ENDCOLOR %s\n" "System Uptime" "$UPDAYS days $UPHOURS hours $UPMINS minutes $UPSECS seconds"
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printf "\n"
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[ -z "$SERVICES" ] && exit
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printf "''${BOLD}Service status:$ENDCOLOR\n"
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while IFS= read -r line; do
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if [[ ! $line =~ ".service" ]]; then
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continue
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fi
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if echo "$line" | grep -q 'failed'; then
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name=$(echo "$line" | awk '{ print $1 }' | sed 's/podman-//g')
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printf "$RED• $ENDCOLOR%-50s $RED[failed]$ENDCOLOR\n" "$name"
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elif echo "$line" | grep -q 'running'; then
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name=$(echo "$line" | awk '{ print $1 }' | sed 's/podman-//g')
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printf "$GREEN• $ENDCOLOR%-50s $GREEN[active]$ENDCOLOR\n" "$name"
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elif echo "$line" | grep -q 'exited'; then
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name=$(echo "$line" | awk '{ print $1 }' | sed 's/podman-//g')
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printf "$YELLOW• $ENDCOLOR%-50s $YELLOW[exited]$ENDCOLOR\n" "$name"
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else
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echo "service status unknown"
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fi
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done <<< "$SERVICES"
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printf "\n"
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'';
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in
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{
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options.motd = {
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networkInterfaces = lib.mkOption {
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description = "Network interfaces to monitor.";
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type = lib.types.listOf lib.types.str;
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default = [ ];
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};
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servicesToCheck = lib.mkOption {
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description = "Services to validate alongside podman containers.";
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type = lib.types.listOf lib.types.str;
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default = [ ];
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};
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};
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config.environment.systemPackages = [
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motd
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];
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}
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