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6655381 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 | """Episode environment: the action API an on-call agent operates through.
Read actions are free-form queries. Mutation actions change world state and
advance the simulated clock. The episode ends when the agent submits a report
or exhausts its action budget.
"""
from __future__ import annotations
import json
from . import world as W
from . import faults as F
PROMPT_VERSION = "v1"
ACTIONS_DOC = """Actions (send one JSON object per turn):
{"action":"list_services"}
{"action":"get_service","service":"<name>"}
{"action":"get_metrics","service":"<name>"}
{"action":"get_deploys","service":"<name>"}
{"action":"get_runbook","service":"<name>"}
{"action":"query_logs","service":"<name>","level":"ERROR|WARN|INFO","contains":"<substring>","limit":30}
{"action":"restart","service":"<name>"}
{"action":"rollback","service":"<name>"}
{"action":"set_config","service":"<name>","key":"<key>","value":<json value>}
{"action":"scale","service":"<name>","replicas":<int>}
{"action":"rotate_secret","service":"<name>","key":"<key>"}
{"action":"peek_queue","queue":"<name>"}
{"action":"purge_message","queue":"<name>","message_id":"<id>"}
{"action":"drain_host","host":"<name>"}
{"action":"submit_report","cause":"<fault_type>:<service>","fix_summary":"<one line>"}
Rules: you have a limited action budget. All actions count, including reads.
End the episode with submit_report. `cause` must be "<fault_type>:<service>",
where fault_type is exactly one of:
bad_deploy, memory_leak, config_drift, dependency_outage,
capacity_shortfall, secret_expiry, poison_message, host_failure
and service is the PRIMARY affected service (the one whose fault it is).
"""
class Episode:
def __init__(self, task: dict):
self.task = task
self.w = W.build_world(task["spec"])
self.budget = task["budget"]
self.used = 0
self.done = False
self.mutations_on_unrelated = 0
# ------------------------------------------------------------ helpers
def _obs(self, obj) -> str:
return W.to_json(obj)
def _err(self, msg: str) -> str:
return self._obs({"error": msg})
def _spend(self, n: float = 1.0) -> bool:
self.used += 1
self.w["t"] += n
if self.used >= self.budget:
self.done = True
return self.done
def _managed(self, svc) -> str | None:
if svc not in self.w["services"]:
return f"unknown service '{svc}'"
if self.w["services"][svc]["kind"] == "external":
return f"'{svc}' is an external dependency; it is not managed by you"
return None
def _fault_services(self) -> set:
out = set()
for f in self.w["faults"]:
out |= set(F.FAULT_TYPES[f["type"]].services(f["params"]))
return out
# ------------------------------------------------------------ actions
def step(self, action: dict) -> str:
if self.done:
return self._err("episode already ended")
name = action.get("action")
fn = getattr(self, "act_" + str(name), None)
if fn is None:
return self._err(f"unknown action '{name}'")
try:
obs = fn(action)
except (KeyError, TypeError, ValueError) as e:
return self._err(f"bad arguments for '{name}': {e}")
return obs
def act_list_services(self, a):
self._spend(0.2)
rows = []
for name, s in self.w["services"].items():
if s["kind"] == "external":
rows.append({"name": name, "kind": s["kind"], "status": s.get("status", "up")})
else:
m = W.metrics(self.w, name)
rows.append({"name": name, "kind": s["kind"], "replicas": s["replicas"],
"error_pct": m["error_pct"], "p99_ms": m["p99_ms"],
"degraded": m["degraded"]})
return self._obs({"services": rows})
def act_get_service(self, a):
self._spend(0.2)
svc = a["service"]
if svc not in self.w["services"]:
return self._err(f"unknown service '{svc}'")
s = self.w["services"][svc]
hosts = {h: {"healthy": self.w["hosts"][h]["healthy"] and h not in self.w["drained_hosts"],
"region": self.w["hosts"][h]["region"],
"replicas": W.replicas_on_host(self.w, svc, h)}
for h in s["hosts"]}
secrets = {k: dict(v) for k, v in s.get("secrets", {}).items()}
return self._obs({"name": svc, "kind": s["kind"], "version": W.current_version(self.w, svc),
"replicas": s["replicas"], "hosts": hosts, "config": s["config"],
"depends": s.get("depends", {}), "secrets": secrets})
def act_get_metrics(self, a):
self._spend(0.2)
svc = a["service"]
if svc not in self.w["services"]:
return self._err(f"unknown service '{svc}'")
m = W.metrics(self.w, svc)
if self.w["services"][svc]["kind"] != "external":
m["per_host"] = W.per_host_metrics(self.w, svc)
return self._obs(m)
def act_get_deploys(self, a):
self._spend(0.2)
svc = a["service"]
if svc not in self.w["services"]:
return self._err(f"unknown service '{svc}'")
return self._obs({"deploys": self.w["services"][svc]["deploys"]})
def act_get_runbook(self, a):
self._spend(0.2)
svc = a["service"]
if svc not in self.w["services"]:
return self._err(f"unknown service '{svc}'")
return self._obs(self.w["services"][svc]["runbook"])
def act_query_logs(self, a):
self._spend(0.2)
svc = a.get("service")
limit = int(a.get("limit", 30))
level = a.get("level")
contains = a.get("contains")
rows = [e for e in self.w["events"]
if (svc is None or e["svc"] == svc)
and (level is None or e["level"] == level)
and (contains is None or contains.lower() in e["msg"].lower())]
rows.sort(key=lambda e: -e["t"])
return self._obs({"events": rows[:limit], "total": len(rows)})
def act_restart(self, a):
e = self._managed(a.get("service"))
if e:
return self._err(e)
svc = a["service"]
self.w["restarts"][svc] = self.w["t"]
W.log(self.w, svc, "INFO", f"rolling restart initiated by oncall ({self.w['services'][svc]['replicas']} replicas)")
done = self._spend(2)
return self._obs({"ok": True, "restarted": svc, "episode_ended": done})
def act_rollback(self, a):
e = self._managed(a.get("service"))
if e:
return self._err(e)
svc = a["service"]
dep = self.w["services"][svc]["deploys"]
if len(dep) < 2:
return self._err(f"no previous version for '{svc}'")
prev = dep[-2]["version"]
dep.append({"version": prev, "t": round(self.w["t"]), "by": "oncall-rollback"})
W.log(self.w, svc, "INFO", f"rollback to {prev} initiated by oncall")
done = self._spend(5)
return self._obs({"ok": True, "version": prev, "episode_ended": done})
def act_set_config(self, a):
e = self._managed(a.get("service"))
if e:
return self._err(e)
svc = a["service"]
s = self.w["services"][svc]
key, value = a.get("key"), a.get("value")
allowed = set(s["config"]) | set(s["runbook"].get("recommended", {})) \
| {f"{d}.endpoint" for d in s.get("depends", {})}
if key not in allowed:
return self._err(f"unknown config key '{key}' for '{svc}'")
old = s["config"].get(key)
s["config"][key] = value
W.log(self.w, svc, "INFO", f"config {key}: {old} -> {value} (oncall)")
done = self._spend(1)
return self._obs({"ok": True, "key": key, "old": old, "new": value, "episode_ended": done})
def act_scale(self, a):
e = self._managed(a.get("service"))
if e:
return self._err(e)
svc = a["service"]
n = a.get("replicas")
if not isinstance(n, int) or not 1 <= n <= 40:
return self._err("replicas must be an integer in [1, 40]")
old = self.w["services"][svc]["replicas"]
self.w["services"][svc]["replicas"] = n
W.log(self.w, svc, "INFO", f"scaled {old} -> {n} by oncall")
done = self._spend(3)
return self._obs({"ok": True, "replicas": n, "episode_ended": done})
def act_rotate_secret(self, a):
e = self._managed(a.get("service"))
if e:
return self._err(e)
svc, key = a["service"], a.get("key", "client_cert")
s = self.w["services"][svc]
if key not in s.get("secrets", {}):
return self._err(f"no secret '{key}' on '{svc}'")
s["secrets"][key]["rotated_at"] = round(self.w["t"], 1)
W.log(self.w, svc, "INFO", f"secret '{key}' rotated by oncall")
done = self._spend(2)
return self._obs({"ok": True, "rotated": key, "episode_ended": done})
def act_peek_queue(self, a):
q = a.get("queue")
if q not in self.w["queues"]:
return self._err(f"unknown queue '{q}'")
self._spend(0.2)
msgs = [{"id": m["id"], "payload": m["payload"], "redeliveries": m["redeliveries"]}
for m in self.w["queues"][q]["messages"][:50]]
return self._obs({"queue": q, "depth": len(self.w["queues"][q]["messages"]),
"messages": msgs})
def act_purge_message(self, a):
q, mid = a.get("queue"), a.get("message_id")
if q not in self.w["queues"]:
return self._err(f"unknown queue '{q}'")
msgs = self.w["queues"][q]["messages"]
before = len(msgs)
self.w["queues"][q]["messages"] = [m for m in msgs if m["id"] != mid]
if len(msgs) == before:
return self._err(f"message '{mid}' not found in '{q}'")
W.log(self.w, q, "INFO", f"message {mid} purged by oncall")
done = self._spend(1)
return self._obs({"ok": True, "purged": mid, "episode_ended": done})
def act_drain_host(self, a):
h = a.get("host")
if h not in self.w["hosts"]:
return self._err(f"unknown host '{h}'")
if h in self.w["drained_hosts"]:
return self._err(f"host '{h}' already drained")
survivors = [h2 for h2 in self.w["hosts"] if h2 != h and self.w["hosts"][h2]["healthy"]]
if not survivors:
return self._err("cannot drain the last healthy host")
moved = {}
for svc, s in self.w["services"].items():
if s["kind"] == "external" or h not in s["hosts"]:
continue
s["hosts"] = [h2 for h2 in s["hosts"] if h2 != h] + [survivors[0]] \
if s["hosts"] == [h] else [h2 for h2 in s["hosts"] if h2 != h]
if not s["hosts"]:
s["hosts"] = [survivors[0]]
moved[svc] = s["replicas"]
self.w["drained_hosts"].append(h)
W.log(self.w, h, "INFO", f"host drained by oncall; migrated: {moved}")
done = self._spend(6)
return self._obs({"ok": True, "drained": h, "migrated": moved, "episode_ended": done})
def act_submit_report(self, a):
cause = a.get("cause", "")
if ":" not in str(cause):
return self._err("cause must be '<fault_type>:<service>'")
self.w["report"] = {"cause": str(cause), "fix_summary": str(a.get("fix_summary", ""))[:500]}
self.done = True
return self._obs({"ok": True, "report": self.w["report"], "episode_ended": True})
# ------------------------------------------------------------ prompt
def system_prompt(self) -> str:
return (
"You are a senior on-call engineer. An alert page just fired:\n\n"
f"ALERT: {self.task['alert']}\n\n"
"You operate a simulated production fleet through the action API below. "
"Diagnose the root cause, apply the minimal correct mitigation, and submit a report. "
"Do not change anything unrelated to the incident: every unnecessary mutation is "
"scored against you. Budget: " + str(self.budget) + " actions (reads count).\n\n"
+ ACTIONS_DOC
)
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