84 lines
3.9 KiB
Nix
84 lines
3.9 KiB
Nix
{ pkgs, ... }:
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let
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healthScript = pkgs.writeShellScriptBin "nixserve-health" ''
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R='\033[0;31m' G='\033[0;32m' Y='\033[1;33m' B='\033[0;34m' W='\033[1m' N='\033[0m'
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ok() { echo -e " ''${G}✓''${N} $*"; }
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warn() { echo -e " ''${Y}⚠''${N} $*"; }
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bad() { echo -e " ''${R}✗''${N} $*"; }
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section(){ echo -e "\n''${W}''${B}$*''${N}"; }
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echo -e "''${W}nixserve''${N} — $(date '+%Y-%m-%d %H:%M') uptime: $(uptime | sed 's/.*up //; s/,.*//') load: $(cut -d' ' -f1-3 /proc/loadavg)"
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# ── ZFS ────────────────────────────────────────────────────────────────────
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section "ZFS"
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while IFS= read -r pool; do
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health=$(zpool list -H -o health "$pool" 2>/dev/null)
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errors=$(zpool status "$pool" 2>/dev/null | awk '/errors:/{$1=""; print substr($0,2)}')
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scrub=$(zpool status "$pool" 2>/dev/null | awk '/scan:/{$1=""; print substr($0,2)}' | head -1)
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if [[ "$health" == "ONLINE" ]]; then
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ok "$pool $health — $errors"
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else
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bad "$pool $health — $errors"
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fi
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[[ -n "$scrub" ]] && echo -e " scrub: $scrub"
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done < <(zpool list -H -o name 2>/dev/null)
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# ── Systemd ─────────────────────────────────────────────────────────────────
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section "Systemd"
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failed=$(systemctl --failed --no-legend --no-pager 2>/dev/null | awk '{print $1}')
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if [[ -z "$failed" ]]; then
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ok "No failed units"
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else
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while IFS= read -r u; do bad "$u"; done <<< "$failed"
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fi
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# ── Docker ──────────────────────────────────────────────────────────────────
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section "Docker"
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if docker info &>/dev/null 2>&1; then
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while IFS=$'\t' read -r name status; do
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[[ -z "$name" ]] && continue
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if [[ "$status" == Up* ]]; then ok "$name ($status)"
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else bad "$name ($status)"; fi
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done < <(docker ps -a --format $'{{.Names}}\t{{.Status}}' 2>/dev/null)
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else
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warn "docker not reachable"
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fi
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# ── Disk ────────────────────────────────────────────────────────────────────
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section "Disk"
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df -h --output=target,pcent,used,size -x tmpfs -x devtmpfs -x efivarfs 2>/dev/null \
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| tail -n +2 \
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| while read -r mnt pct used size; do
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n=''${pct/\%/}
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if (( n >= 90 )); then bad "$mnt $pct ($used / $size)"
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elif (( n >= 75 )); then warn "$mnt $pct ($used / $size)"
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else ok "$mnt $pct ($used / $size)"
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fi
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done
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# ── Memory ──────────────────────────────────────────────────────────────────
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section "Memory"
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free -h | awk '/^Mem:/{printf " used: %s / %s free: %s\n", $3, $2, $4}'
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# ── Recent errors ───────────────────────────────────────────────────────────
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section "Journal errors (last hour)"
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errs=$(journalctl -p err --since "1 hour ago" --no-pager -q 2>/dev/null \
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| grep -v "^$" | tail -8)
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if [[ -z "$errs" ]]; then
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ok "None"
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else
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while IFS= read -r line; do warn "$line"; done <<< "$errs"
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fi
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echo
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'';
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in
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{
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environment.systemPackages = [ healthScript ];
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programs.zsh.loginShellInit = ''
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[[ -n "$SSH_CONNECTION" ]] && nixserve-health
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'';
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}
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