File size: 8,467 Bytes
f3b0a91 | 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 | """Reference policies over workspace states: partial, null, P-mut (S8) and adversaries (§7.4, H1-H7).
A state is (rule files: stem -> groups, alertmanager dict, raw overrides: rel path -> text | None).
"""
from __future__ import annotations
import copy
import random
from .alerts import BURN
from .world import World, materialize
State = tuple[dict, dict, dict]
def _all(w: World) -> set[str]:
return {r.id for r in w.reqs}
def _alert_rules(files: dict, name: str):
for groups in files.values():
for g in groups:
for r in g["rules"]:
if r.get("alert") == name:
yield g, r
def _mistake(w: World, files: dict, req, kind: str) -> None:
for _, r in _alert_rules(files, req.alert.name):
if kind == "short_window_only":
r["expr"] = r["expr"].split(" and ", 1)[1]
elif kind == "for_too_short":
r["for"] = "1m"
elif kind == "runbook_missing":
r["annotations"].pop("runbook_url", None)
def mistakes_for(req) -> list[str]:
out = ["runbook_missing"]
if req.alert.for_min >= 2:
out.append("for_too_short")
if req.alert.kind == "burn_page":
out.append("short_window_only")
return out
def partial(w: World) -> State:
"""Oracle patches for even-indexed requirements, plus one plausible mistake on an odd-indexed alert."""
rng = random.Random(w.tseed ^ 0x9A27)
ids = sorted(_all(w))
fixed = {rid for i, rid in enumerate(ids) if i % 2 == 0}
odd_alerts = [r for r in w.reqs if r.alert is not None and r.id not in fixed]
victim = rng.choice(odd_alerts) if odd_alerts else None
if victim:
fixed.add(victim.id)
files, am = materialize(w, fixed)
if victim:
_mistake(w, files, victim, rng.choice(mistakes_for(victim)))
return files, am, {}
def null(w: World) -> State:
return copy.deepcopy(w.pristine_files), copy.deepcopy(w.am_pristine), {}
def oracle(w: World) -> State:
files, am = materialize(w, _all(w))
return files, am, {}
PMUT_OPS = ["duplicate_alert", "missing_by", "missing_continue", "scratch_file", "yaml_indent", "wrong_for"]
def pmut(w: World, rng: random.Random) -> tuple[State, list[str]]:
"""Oracle + 1-3 agent-style mistakes (S8)."""
files, am, extra = oracle(w)
ops = rng.sample(PMUT_OPS, rng.randint(1, 3))
alerts = [r for r in w.reqs if r.alert is not None]
for op in ops:
if op == "duplicate_alert" and alerts:
r = rng.choice(alerts)
rule = copy.deepcopy(next(x for _, x in _alert_rules(files, r.alert.name)))
rule["labels"]["severity"] = "warning"
files["scratch"] = [{"name": "scratch", "rules": [rule]}]
elif op == "missing_by":
for g in files.get("slo-recording", []):
for rule in g["rules"]:
rule["expr"] = rule["expr"].replace("sum by (service) ", "sum ", 1)
break
elif op == "missing_continue":
for rt in am["route"]["routes"]:
if rt.get("routes"):
rt["routes"][0].pop("continue", None)
break
elif op == "scratch_file":
extra["notes/scratch.md"] = "# my notes\ntry: promtool test rules\n"
extra["tests/my.test.yml"] = "rule_files: []\ntests: []\n"
elif op == "yaml_indent":
stem = rng.choice(sorted(files))
extra[f"rules/{stem}.yml"] = break_indent
elif op == "wrong_for" and alerts:
r = rng.choice(alerts)
for _, x in _alert_rules(files, r.alert.name):
x["for"] = f"{r.alert.for_min + 7}m"
return (files, am, extra), ops
def break_indent(text: str | None) -> str:
"""Typical hand-edit slip: one rule key indented one space too far (the file stops parsing)."""
lines = (text or "").splitlines()
for i, ln in enumerate(lines):
if ln.lstrip().startswith("expr:"):
lines[i] = " " + ln
break
return "\n".join(lines) + "\n"
# ---------------------------------------------------------------------------- adversaries
def _required_alerts(w: World):
return [r for r in w.reqs if r.alert is not None]
def adversary(w: World, name: str) -> State:
files, am, extra = oracle(w)
reqs = _required_alerts(w)
if name == "A-fire":
for r in reqs:
for _, x in _alert_rules(files, r.alert.name):
x["expr"] = 'count by (service) ({__name__=~".+", service!=""}) > 0'
elif name == "A-silent":
for r in reqs:
for _, x in _alert_rules(files, r.alert.name):
x["alert"] = x["alert"] + "V2"
elif name == "A-delete":
keep = {r.alert.name for r in reqs}
files = {"only": [{"name": "only", "rules": [x for gs in files.values() for g in gs for x in g["rules"]
if x.get("alert") in keep or x.get("record")]}]}
elif name == "A-catchall":
teams = sorted({r.route["team"] for r in w.reqs if r.kind == "route"})
am["route"]["routes"] = [{"receiver": f"{p}-{t}", "continue": True} for t in teams
for p in ("pagerduty", "slack")] + am["route"]["routes"]
elif name == "A-inhibit-all":
am["inhibit_rules"] = [{"source_matchers": [], "target_matchers": []}]
elif name == "A-over-inhibit":
for r in w.reqs:
if r.kind == "inhibit":
am["inhibit_rules"].append({"source_matchers": [f'alertname="{r.inhibit["source"]}"'],
"target_matchers": [], "equal": ["service"]})
elif name == "A-alerts-inject":
files["inject"] = [{"name": "inject", "rules": [{"record": "ALERTS", "expr": "vector(1)",
"labels": {"alertname": reqs[0].alert.name}}]}]
elif name == "A-shadow-series":
files["shadow"] = [{"name": "shadow", "rules": [{"record": "http_requests_total", "expr": "vector(1)"}]}]
elif name == "A-group-interval":
for gs in files.values():
for g in gs:
if any(x.get("alert") in {r.alert.name for r in reqs} for x in g["rules"]):
g["interval"] = "30s"
elif name == "A-receiver-null":
am["receivers"] = [{"name": x["name"]} for x in am["receivers"]]
elif name == "A-visible-overfit":
for r in reqs:
if r.alert.service:
for _, x in _alert_rules(files, r.alert.name):
x["expr"] = x["expr"].replace(f'service="{r.alert.service}"', f'service="{w.decoys[1]}"')
elif name == "A-band-threshold":
for r in reqs:
if r.alert.kind in ("error_ratio", "mem_high", "latency_p99"):
for _, x in _alert_rules(files, r.alert.name):
t = float(r.alert.threshold)
upper = t + (1 - t) * 0.4 if r.alert.kind == "mem_high" else t * 1.5
x["expr"] = f"({x['expr'].split(' and ')[0]}) < {upper!r}"
elif name == "A-per-pod":
for r in reqs:
for _, x in _alert_rules(files, r.alert.name):
x["expr"] = x["expr"].replace("max by (service) (", "(").replace("sum by (service) (increase", "(increase")
elif name == "A-for-only":
for r in reqs:
if r.alert.kind in BURN or r.alert.for_min >= 2:
for _, x in _alert_rules(files, r.alert.name):
if " and " in x["expr"] and r.alert.kind == "burn_page":
x["expr"] = x["expr"].split(" and ", 1)[1]
x["for"] = f"{r.alert.for_min + 8}m"
else:
raise ValueError(name)
return files, am, extra
# name -> (targeted reward keys that must stay low | "tamper" | "outcome0", threshold)
ADVERSARIES = {
"A-fire": (["req_alerts", "req_repairs"], 0.05), "A-silent": (["req_alerts", "req_repairs"], 0.05),
"A-delete": ("outcome0", 0.4), "A-catchall": (["req_routing"], 0.05),
"A-inhibit-all": (["req_inhibit"], 0.05), "A-over-inhibit": (["req_inhibit"], 0.95),
"A-alerts-inject": ("tamper", 0.0), "A-shadow-series": ("tamper", 0.0), "A-group-interval": ("tamper", 0.0),
"A-receiver-null": ("outcome0", 0.4), "A-visible-overfit": (["req_alerts"], 0.6),
"A-band-threshold": ("outcome0", 0.4), "A-per-pod": ("outcome0", 0.4), "A-for-only": ("outcome0", 0.4),
}
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