upload

agent/agentv2.py

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+import os, re, yaml
+from fastapi import FastAPI, Request, HTTPException
+from pydantic import BaseModel
+try:
+    import docker
+except Exception:
+    docker = None
+
+PORT = int(os.getenv("PORT", "8080"))
+GUARD_DEFAULT_MAX = 25
+RULES_PATH = "rules.yaml"
+if os.path.exists(RULES_PATH):
+    with open(RULES_PATH, "r") as f:
+        RULES = yaml.safe_load(f) or {}
+else:
+    RULES = {}
+
+ALLOWED_REGEX = re.compile(RULES.get("guardrails", {}).get("allowed_services_regex", ".*"))
+MAX_SCALE = int(RULES.get("guardrails", {}).get("max_scale_replicas", GUARD_DEFAULT_MAX))
+DOCKER_SOCK = "/var/run/docker.sock"
+_client = None
+
+def get_client():
+    global _client
+    if _client is not None:
+        return _client
+    if docker is None:
+        raise HTTPException(500, "docker SDK not available in image.")
+    if not os.path.exists(DOCKER_SOCK):
+        raise HTTPException(500, f"Docker socket not found at {DOCKER_SOCK}. Did you mount it?")
+    try:
+        _client = docker.DockerClient(base_url=f'unix://{DOCKER_SOCK}')
+        _client.ping()
+        return _client
+    except Exception as e:
+        raise HTTPException(500, f"Cannot connect to Docker at {DOCKER_SOCK}: {e}")
+
+app = FastAPI(title="BurnServ AI Ops Agent")
+
+def _guard_service(service_name: str):
+    if not ALLOWED_REGEX.match(service_name):
+        raise HTTPException(403, f"Service '{service_name}' not allowed by guardrails.")
+
+def _scale(service_name: str, replicas: int = None, step: int = None, min_replicas: int = None, max_replicas: int = None):
+    cli = get_client()
+    _guard_service(service_name)
+    try:
+        svc = cli.services.get(service_name)
+    except Exception:
+        raise HTTPException(404, f"Service '{service_name}' not found")
+    spec = svc.attrs.get('Spec', {}).copy()
+    mode = spec.get('Mode', {})
+    replicas_current = mode.get('Replicated', {}).get('Replicas', 1)
+    if replicas is None:
+        tgt = int(replicas_current) + int(step or 1)
+        if min_replicas is not None: tgt = max(tgt, int(min_replicas))
+        if max_replicas is not None: tgt = min(tgt, int(max_replicas))
+        replicas = tgt
+    replicas = max(1, min(int(replicas), MAX_SCALE))
+    mode['Replicated'] = {'Replicas': replicas}
+    spec['Mode'] = mode
+    try:
+        svc.update(task_template=spec.get('TaskTemplate'), **{k: v for k, v in spec.items() if k != 'TaskTemplate'})
+    except Exception:
+        svc.update(**spec)
+    return {"service": service_name, "replicas": replicas}
+
+def _restart_service(service_name: str):
+    cli = get_client()
+    _guard_service(service_name)
+    try:
+        svc = cli.services.get(service_name)
+    except Exception:
+        raise HTTPException(404, f"Service '{service_name}' not found")
+    # Use SDK-native ForceUpdate bump with current spec fetched by the SDK
+    try:
+        # Passing fetch_current_spec=True lets docker-py pull the live spec,
+        # and force_update tells Swarm to redeploy tasks (rolling restart)
+        svc.update(fetch_current_spec=True, force_update=(int(os.getenv("FORCE_UPDATE_BUMP", "1"))))
+        return {"service": service_name, "status": "rolling-restart-issued"}
+    except Exception as e:
+        # Fallback: manually bump TaskTemplate.ForceUpdate in-place
+        spec = svc.attrs.get('Spec', {}).copy()
+        tt = spec.get('TaskTemplate') or {}
+        fu = int(tt.get('ForceUpdate') or 0)
+        tt['ForceUpdate'] = fu + 1
+        spec['TaskTemplate'] = tt
+        try:
+            svc.update(task_template=spec.get('TaskTemplate'),
+                       name=spec.get('Name'),
+                       labels=spec.get('Labels'),
+                       mode=spec.get('Mode'),
+                       update_config=spec.get('UpdateConfig'),
+                       networks=spec.get('Networks'),
+                       endpoint_spec=spec.get('EndpointSpec'))
+            return {"service": service_name, "status": "rolling-restart-issued"}
+        except Exception as e2:
+            raise HTTPException(500, f"Restart failed: {e2}")
+
+class Command(BaseModel):
+    text: str = ""
+    action: str | None = None
+    params: dict | None = None
+
+@app.get("/health")
+def health():
+    return {"ok": True}
+
+@app.get("/diagnostics")
+def diagnostics():
+    info = {"docker_sock_exists": os.path.exists(DOCKER_SOCK), "rules_loaded": bool(RULES)}
+    try:
+        cli = get_client()
+        info["docker_ping"] = True
+        info["server_version"] = cli.version()
+    except Exception as e:
+        info["docker_ping"] = False
+        info["error"] = str(e)
+    return info
+
+@app.post("/command")
+def command(cmd: Command):
+    if cmd.action:
+        if cmd.action == "scale":
+            p = cmd.params or {}
+            if "service" not in p or "replicas" not in p:
+                raise HTTPException(400, "Missing params for scale: service, replicas")
+            return _scale(p["service"], replicas=int(p["replicas"]))
+        if cmd.action == "restart_service":
+            p = cmd.params or {}
+            if "service" not in p:
+                raise HTTPException(400, "Missing service param for restart_service")
+            return _restart_service(p["service"])
+        raise HTTPException(400, "Unknown action")
+    t = (cmd.text or "").strip().lower()
+    if not t:
+        raise HTTPException(400, "Empty command")
+    if t.startswith("scale "):
+        parts = t.split()
+        try:
+            svc = parts[1]
+            if "to" in parts:
+                idx_to = parts.index("to")
+                reps = int(parts[idx_to + 1])
+                return _scale(svc, replicas=reps)
+            return _scale(svc, step=1)
+        except Exception:
+            raise HTTPException(400, "Format: 'scale <service> to <n>'")
+    if t.startswith("restart "):
+        try:
+            svc = t.split()[1]
+            return _restart_service(svc)
+        except Exception:
+            raise HTTPException(400, "Format: 'restart <service>'")
+    raise HTTPException(400, "Unrecognized command")
+
+@app.post("/alert")
+async def alert(request: Request):
+    payload = await request.json()
+    alerts = payload.get("alerts", [])
+    executed = []
+    for a in alerts:
+        labels = a.get("labels", {}) or {}
+        for rule in RULES.get("alerts", []):
+            match = rule.get("match", {})
+            if all(labels.get(k) == v for k, v in match.items()):
+                for act in rule.get("actions", []):
+                    if "scale" in act:
+                        cfg = act["scale"].copy()
+                        svc = cfg.get("service", "").replace("{{ $labels.service_name }}", labels.get("service_name", ""))
+                        res = _scale(service_name=svc,
+                                     replicas=cfg.get("replicas"),
+                                     step=cfg.get("step"),
+                                     min_replicas=cfg.get("min_replicas"),
+                                     max_replicas=cfg.get("max_replicas", MAX_SCALE))
+                        executed.append({"alert": labels.get("alertname"), "action": "scale", "result": res})
+                    elif "restart_service" in act:
+                        cfg = act["restart_service"].copy()
+                        svc = cfg.get("service", "").replace("{{ $labels.service_name }}", labels.get("service_name", ""))
+                        res = _restart_service(svc)
+                        executed.append({"alert": labels.get("alertname"), "action": "restart_service", "result": res})
+    return {"executed": executed}