Merge pull request 'server status' (#11) from feature/home-server-status-prometheus into main

Reviewed-on: #11

.gitignore

@@ -42,3 +42,5 @@ yarn-error.log*
 
 source-bestiary/
 source-drops/
+site/server-status.json
+site/server-status.json.tmp

scripts/write-server-status-json.py

@@ -0,0 +1,103 @@
+#!/usr/bin/env python3
+import json
+import os
+import urllib.parse
+import urllib.request
+from datetime import datetime, timezone
+from pathlib import Path
+
+PROMETHEUS_URL = os.environ.get("PROMETHEUS_URL", "http://5.0.0.20:9090").rstrip("/")
+SOURCE_URL = os.environ.get("SERVER_STATUS_SOURCE_URL", "").strip()
+OUTPUT_PATH = Path(os.environ.get("SERVER_STATUS_JSON", "site/server-status.json"))
+TIMEOUT_SECONDS = float(os.environ.get("PROMETHEUS_TIMEOUT_SECONDS", "5"))
+
+def write_data(data):
+    if not isinstance(data.get("servers"), list):
+        raise SystemExit("server status JSON missing servers array")
+
+    data["generated_at"] = datetime.now(timezone.utc).isoformat().replace("+00:00", "Z")
+
+    OUTPUT_PATH.parent.mkdir(parents=True, exist_ok=True)
+    tmp_path = OUTPUT_PATH.with_name(OUTPUT_PATH.name + ".tmp")
+    tmp_path.write_text(json.dumps(data, separators=(",", ":")) + "\n")
+    os.replace(tmp_path, OUTPUT_PATH)
+    print(f"wrote {OUTPUT_PATH}")
+
+def prom_value(query):
+    url = PROMETHEUS_URL + "/api/v1/query?" + urllib.parse.urlencode({"query": query})
+    with urllib.request.urlopen(url, timeout=TIMEOUT_SECONDS) as response:
+        body = json.loads(response.read().decode("utf-8"))
+
+    result = body.get("data", {}).get("result", [])
+    if not result:
+        return 0
+    return int(float(result[0]["value"][1]))
+
+def q(metric, labels):
+    label_text = ",".join(f'{key}="{value}"' for key, value in labels.items())
+    return f"sum({metric}{{{label_text}}}) or vector(0)"
+
+def newserv(region, service, ship, version):
+    return prom_value(q("pso_newserv_clients_connected", {
+        "region": region,
+        "service": service,
+        "ship": ship,
+        "version": version,
+    }))
+
+def adhoc(region, game):
+    return prom_value(q("psppeeps_adhoc_connected_clients_by_product", {
+        "region": region,
+        "service": f"{region}-psppeeps-adhoc",
+        "ship": "psp",
+        "game": game,
+    }))
+
+def row(label, players):
+    return {"label": label, "players": int(players)}
+
+def main():
+    if SOURCE_URL:
+        with urllib.request.urlopen(SOURCE_URL, timeout=TIMEOUT_SECONDS) as response:
+            write_data(json.loads(response.read().decode("utf-8")))
+        return
+
+    us_alis_v2 = newserv("us", "us-newserv-live", "live", "v2")
+    us_alis_v3 = newserv("us", "us-newserv-live", "live", "v3")
+    us_alis_bb = newserv("us", "us-newserv-live", "live", "v4")
+    us_abion_hcbb = newserv("us", "us-newserv-hardcore", "hardcore", "v4")
+    us_adhoc_psp1 = adhoc("us", "psp1")
+    us_adhoc_psp2i = adhoc("us", "psp2i")
+
+    eu_palma_v2 = newserv("eu", "eu-newserv-live", "live", "v2")
+    eu_palma_v3 = newserv("eu", "eu-newserv-live", "live", "v3")
+    eu_palma_bb = newserv("eu", "eu-newserv-live", "live", "v4")
+    eu_aiedo_hcbb = newserv("eu", "eu-newserv-hardcore", "hardcore", "v4")
+    eu_adhoc_psp1 = adhoc("eu", "psp1")
+    eu_adhoc_psp2i = adhoc("eu", "psp2i")
+
+    write_data({
+        "servers": [
+            {
+                "label": "US Server",
+                "players": us_alis_v2 + us_alis_v3 + us_alis_bb + us_abion_hcbb + us_adhoc_psp1 + us_adhoc_psp2i,
+                "ships": [
+                    {"label": "Alis", "rows": [row("V2", us_alis_v2), row("V3", us_alis_v3), row("BB", us_alis_bb)]},
+                    {"label": "Abion", "rows": [row("HC/BB", us_abion_hcbb)]},
+                    {"label": "AdHoc-US", "rows": [row("PSP1", us_adhoc_psp1), row("PSP2i", us_adhoc_psp2i)]},
+                ],
+            },
+            {
+                "label": "EU Server",
+                "players": eu_palma_v2 + eu_palma_v3 + eu_palma_bb + eu_aiedo_hcbb + eu_adhoc_psp1 + eu_adhoc_psp2i,
+                "ships": [
+                    {"label": "Palma", "rows": [row("V2", eu_palma_v2), row("V3", eu_palma_v3), row("BB", eu_palma_bb)]},
+                    {"label": "Aiedo", "rows": [row("HC/BB", eu_aiedo_hcbb)]},
+                    {"label": "AdHoc-EU", "rows": [row("PSP1", eu_adhoc_psp1), row("PSP2i", eu_adhoc_psp2i)]},
+                ],
+            },
+        ],
+    })
+
+if __name__ == "__main__":
+    main()

site/server-status.js

@@ -39,8 +39,16 @@
     `).join("");
   };
 
-  fetch("/api/server-status", { cache: "no-store" })
+  const loadStatus = (url) => fetch(url, { cache: "no-store" })
-    .then((res) => res.ok ? res.json() : null)
+    .then((res) => {
+      if (!res.ok) {
+        throw new Error(`status ${res.status}`);
+      }
+      return res.json();
+    });
+
+  loadStatus(`/server-status.json?ts=${Date.now()}`)
+    .catch(() => loadStatus("/api/server-status"))
     .then((data) => data && render(data))
     .catch(() => {});
 })();