hetzner-admin: show CPU load / memory / disk / uptime, add Container Stats command

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N5eS3SG9dxKszFC7t3QZn9

2 files changed, 55 insertions, 0 deletions

diff --git a/hetzner-admin/app.py b/hetzner-admin/app.py
index a9377a8..17895d9 100644
--- a/hetzner-admin/app.py
+++ b/hetzner-admin/app.py
@@ -55,6 +55,7 @@ app.config.update(
 
 COMMANDS = [
     ("Docker Status", "docker ps"),
+    ("Container Stats", "docker stats"),
     ("Restart Caddy", "docker compose -f /app/infra/caddy/docker-compose.yml restart"),
     ("Restart Mail", "docker compose -f /app/infra/mail/docker-compose.yml restart"),
     ("Restart cgit", "docker compose -f /app/infra/cgit/docker-compose.yml restart"),
@@ -110,6 +111,20 @@ HTML = """<!DOCTYPE html>
 <body>
 <h3>Server Admin</h3>
 <p><a href="https://status.yyamashita.com">Status</a></p>
+<h4>Resources</h4>
+{% if resources is string %}
+<p style="color:red">{{ resources }}</p>
+{% else %}
+<table>
+{% for label, pct, text in resources %}
+<tr>
+  <td>{{ label }}</td>
+  <td>{% if pct is not none %}<meter min="0" max="100" low="70" high="90" optimum="0" value="{{ pct }}"></meter>{% endif %}</td>
+  <td>{{ text }}</td>
+</tr>
+{% endfor %}
+</table>
+{% endif %}
 <h4>Services</h4>
 {% if services is string %}
 <p style="color:red">{{ services }}</p>
@@ -214,10 +229,39 @@ def load_services():
     return [(name, states.get(name, "unknown")) for name in SERVICES]
 
 
+def fmt_bytes(n):
+    for unit in ("B", "KiB", "MiB", "GiB", "TiB"):
+        if n < 1024 or unit == "TiB":
+            return f"{n:.1f} {unit}"
+        n /= 1024
+
+
+def load_resources():
+    """[(label, percent|None, text), ...]。取得できなければエラーメッセージ（str）"""
+    try:
+        out = run_ssh("resources")
+        v = {k: rest.split() for k, _, rest in (line.partition(" ") for line in out.splitlines())}
+        cpus = int(v["cpus"][0])
+        load = [float(x) for x in v["load"]]
+        mem_total, mem_used = (int(x) for x in v["mem"])
+        disk_total, disk_used = (int(x) for x in v["disk"])
+        up = int(v["uptime"][0])
+    except Exception as e:
+        return f"Error loading resources: {e}"
+    return [
+        ("CPU", min(100, load[0] / cpus * 100),
+         f"load {' / '.join(f'{x:.2f}' for x in load)} ({cpus} cores)"),
+        ("Memory", mem_used / mem_total * 100, f"{fmt_bytes(mem_used)} / {fmt_bytes(mem_total)}"),
+        ("Disk /", disk_used / disk_total * 100, f"{fmt_bytes(disk_used)} / {fmt_bytes(disk_total)}"),
+        ("Uptime", None, f"{up // 86400}d {up % 86400 // 3600}h {up % 3600 // 60}m"),
+    ]
+
+
 def render_index(output=None):
     return render_template_string(
         HTML,
         commands=COMMANDS,
+        resources=load_resources(),
         services=load_services(),
         output=output,
         passkey_count=len(load_passkeys()),
diff --git a/hetzner-admin/run-command.sh b/hetzner-admin/run-command.sh
index d1f68f8..b473ce4 100755
--- a/hetzner-admin/run-command.sh
+++ b/hetzner-admin/run-command.sh
@@ -56,9 +56,20 @@ case "$SSH_ORIGINAL_COMMAND" in
       if [ -n "$unit" ]; then systemctl enable --now "$unit" 2>&1; else docker compose -f "$compose" up -d 2>&1; fi
     fi
     ;;
+  "resources")
+    # 管理画面のリソース表示用。"key value..." 形式で出力し app.py がパースする
+    echo "cpus $(nproc)"
+    echo "load $(cut -d' ' -f1-3 /proc/loadavg)"
+    awk '/^MemTotal:/{t=$2} /^MemAvailable:/{a=$2} END{print "mem", t*1024, (t-a)*1024}' /proc/meminfo
+    df -B1 --output=size,used / | awk 'NR==2{print "disk", $1, $2}'
+    echo "uptime $(cut -d. -f1 /proc/uptime)"
+    ;;
   "docker ps")
     exec docker ps
     ;;
+  "docker stats")
+    exec docker stats --no-stream --format 'table {{.Name}}\t{{.CPUPerc}}\t{{.MemUsage}}\t{{.MemPerc}}'
+    ;;
   "docker compose -f /app/infra/caddy/docker-compose.yml restart")
     exec docker compose -f /app/infra/caddy/docker-compose.yml restart
     ;;