Healthscript on login

2026-07-21 10:50:38 +02:00
parent 619fd924c5
commit f6e211def0
2 changed files with 84 additions and 1 deletions
@@ -0,0 +1,83 @@
+{ pkgs, ... }:
+
+let
+  healthScript = pkgs.writeShellScriptBin "nixserve-health" ''
+    R='\033[0;31m' G='\033[0;32m' Y='\033[1;33m' B='\033[0;34m' W='\033[1m' N='\033[0m'
+    ok()     { echo -e "  ''${G}✓''${N} $*"; }
+    warn()   { echo -e "  ''${Y}⚠''${N} $*"; }
+    bad()    { echo -e "  ''${R}✗''${N} $*"; }
+    section(){ echo -e "\n''${W}''${B}$*''${N}"; }
+
+    echo -e "''${W}nixserve''${N} — $(date '+%Y-%m-%d %H:%M')  uptime: $(uptime -p | sed 's/up //')  load: $(cut -d' ' -f1-3 /proc/loadavg)"
+
+    # ── ZFS ────────────────────────────────────────────────────────────────────
+    section "ZFS"
+    while IFS= read -r pool; do
+      health=$(zpool list -H -o health "$pool" 2>/dev/null)
+      errors=$(zpool status "$pool" 2>/dev/null | awk '/errors:/{$1=""; print substr($0,2)}')
+      scrub=$(zpool status "$pool" 2>/dev/null | awk '/scan:/{$1=""; print substr($0,2)}' | head -1)
+      if [[ "$health" == "ONLINE" ]]; then
+        ok "$pool  $health  — $errors"
+      else
+        bad "$pool  $health  — $errors"
+      fi
+      [[ -n "$scrub" ]] && echo -e "       scrub: $scrub"
+    done < <(zpool list -H -o name 2>/dev/null)
+
+    # ── Systemd ─────────────────────────────────────────────────────────────────
+    section "Systemd"
+    failed=$(systemctl --failed --no-legend --no-pager 2>/dev/null | awk '{print $1}')
+    if [[ -z "$failed" ]]; then
+      ok "No failed units"
+    else
+      while IFS= read -r u; do bad "$u"; done <<< "$failed"
+    fi
+
+    # ── Docker ──────────────────────────────────────────────────────────────────
+    section "Docker"
+    if docker info &>/dev/null 2>&1; then
+      while IFS=$'\t' read -r name status; do
+        [[ -z "$name" ]] && continue
+        if [[ "$status" == Up* ]]; then ok "$name  ($status)"
+        else bad "$name  ($status)"; fi
+      done < <(docker ps -a --format $'{{.Names}}\t{{.Status}}' 2>/dev/null)
+    else
+      warn "docker not reachable"
+    fi
+
+    # ── Disk ────────────────────────────────────────────────────────────────────
+    section "Disk"
+    df -h --output=target,pcent,used,size -x tmpfs -x devtmpfs -x efivarfs 2>/dev/null \
+      | tail -n +2 \
+      | while read -r mnt pct used size; do
+          n=''${pct/\%/}
+          if   (( n >= 90 )); then bad  "$mnt  $pct  ($used / $size)"
+          elif (( n >= 75 )); then warn "$mnt  $pct  ($used / $size)"
+          else                     ok   "$mnt  $pct  ($used / $size)"
+          fi
+        done
+
+    # ── Memory ──────────────────────────────────────────────────────────────────
+    section "Memory"
+    free -h | awk '/^Mem:/{printf "  used: %s / %s   free: %s\n", $3, $2, $4}'
+
+    # ── Recent errors ───────────────────────────────────────────────────────────
+    section "Journal errors (last hour)"
+    errs=$(journalctl -p err --since "1 hour ago" --no-pager -q 2>/dev/null \
+           | grep -v "^$" | tail -8)
+    if [[ -z "$errs" ]]; then
+      ok "None"
+    else
+      while IFS= read -r line; do warn "$line"; done <<< "$errs"
+    fi
+
+    echo
+  '';
+in
+{
+  environment.systemPackages = [ healthScript ];
+
+  programs.zsh.loginShellInit = ''
+    [[ -n "$SSH_CONNECTION" ]] && nixserve-health
+  '';
+}