feat(aiops): add ssh_docker_prune to auto-repair flywheel for disk-full alerts
Adds Group B SSH MCP tool ssh_docker_prune (image+volume+builder prune with ≥75% disk usage gate) and routes "docker prune" actions through it. Flips HostDiskUsageHigh from auto_repair=false to true with mcp_provider routing labels so the flywheel can self-heal next disk-full event without hitting the emergency_channel Telegram path. Trigger: 2026-05-01 → 05-02 Telegram alert storm (peak 53/hr) caused by empty ssh-mcp-key/known_hosts secret rejecting all SSH and forcing every disk-full alert through "Host key is not trusted → escalate" loop. known_hosts patched live; this commit closes the playbook gap so the next occurrence resolves without manual intervention. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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@@ -126,8 +126,13 @@ GROUP_B_TOOLS = {
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"ssh_clear_docker_logs",
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"ssh_renew_ssl",
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"ssh_reload_nginx",
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"ssh_docker_prune",
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}
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# Disk usage gate for ssh_docker_prune (only run when usage >= this %)
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# 2026-05-02 ogt + Claude Sonnet 4.6: prevent accidental prune on healthy hosts
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DOCKER_PRUNE_DISK_GATE_PCT = 75
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ALL_TOOLS = GROUP_A_TOOLS | GROUP_B_TOOLS
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MIN_TRUST_SCORE_FOR_GROUP_B = 0.8
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@@ -335,6 +340,19 @@ class SSHProvider(MCPToolProvider):
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}, "required": ["host", "trust_score"]},
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server_name=self.name,
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),
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MCPTool(
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name="ssh_docker_prune",
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description=(
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"Reclaim disk space via docker image+volume+builder prune. "
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f"Gated: only runs when root filesystem usage >= {DOCKER_PRUNE_DISK_GATE_PCT}%. "
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"Requires trust_score >= 0.8."
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),
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input_schema={"type": "object", "properties": {
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"host": {"type": "string"},
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"trust_score": {"type": "number"},
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}, "required": ["host", "trust_score"]},
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server_name=self.name,
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),
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]
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# =========================================================================
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@@ -551,6 +569,21 @@ class SSHProvider(MCPToolProvider):
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if tool_name == "ssh_reload_nginx":
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return "nginx -t 2>&1 && systemctl reload nginx && echo 'Nginx reloaded'"
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if tool_name == "ssh_docker_prune":
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# Disk-gated docker prune: only acts when the alerting condition still holds.
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# 2026-05-02 ogt + Claude Sonnet 4.6: ADR-068 飛輪 — disk full SOP
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gate = DOCKER_PRUNE_DISK_GATE_PCT
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return (
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"USAGE=$(df --output=pcent / | tail -1 | tr -dc '0-9'); "
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f"if [ -z \"$USAGE\" ] || [ \"$USAGE\" -lt {gate} ]; then "
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f"echo \"skip: disk usage ${{USAGE}}% < {gate}% gate\"; exit 0; fi; "
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"echo '=== DISK BEFORE ==='; df -h /; "
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"echo '=== IMAGE PRUNE ==='; docker image prune -a -f 2>&1 | tail -3; "
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"echo '=== VOLUME PRUNE ==='; docker volume prune -f 2>&1 | tail -3; "
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"echo '=== BUILDER PRUNE ==='; docker builder prune -a -f 2>&1 | tail -3; "
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"echo '=== DISK AFTER ==='; df -h /"
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)
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raise ValueError(f"No command builder for tool: {tool_name}")
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async def _ssh_exec(
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@@ -3307,6 +3307,11 @@ class DecisionManager:
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elif _action_lower.startswith("ssh ") and "docker restart" in _action_lower and target != "unknown":
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_tool = "ssh_docker_restart"
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_container = target
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elif _action_lower.startswith("ssh ") and "docker" in _action_lower and "prune" in _action_lower:
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# 主機磁碟告警自動修復：docker image/volume/builder prune
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# 2026-05-02 ogt + Claude Sonnet 4.6: ADR-068 飛輪 — disk full SOP
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# ssh_docker_prune 內含 ≥75% 磁碟使用率守衛，低於閾值會 no-op
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_tool = "ssh_docker_prune"
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elif _action_lower.startswith("ssh ") and ("ps aux" in _action_lower or "top" in _action_lower or "free" in _action_lower or "df -h" in _action_lower or "uptime" in _action_lower):
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# 主機診斷指令：自動收集 CPU/記憶體/磁碟，不修改任何狀態
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_tool = "ssh_diagnose"
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@@ -3339,6 +3344,7 @@ class DecisionManager:
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elif _tool == "ssh_systemctl_restart":
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params["service"] = _service
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if _tool in {"ssh_docker_restart", "ssh_systemctl_restart"}:
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# Codex: 用 token 的 trust_score / confidence 餵給 Group B 守衛
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try:
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params["trust_score"] = float(
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token.proposal_data.get("trust_score")
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@@ -3347,6 +3353,10 @@ class DecisionManager:
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)
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except Exception:
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params["trust_score"] = 0.0
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elif _tool == "ssh_docker_prune":
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# 2026-05-02 ogt + Claude Sonnet 4.6: docker prune 飛輪
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# Group B 工具需要 trust_score；自動修復鏈用 0.85（高於 0.8 門檻）
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params["trust_score"] = 0.85
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# ssh_diagnose: read-only, host only.
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try:
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136
apps/api/tests/test_decision_manager_docker_prune_routing.py
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136
apps/api/tests/test_decision_manager_docker_prune_routing.py
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@@ -0,0 +1,136 @@
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"""
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DecisionManager._ssh_execute docker prune 路由測試
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=================================================
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ADR-068 飛輪 — disk full SOP（2026-05-02 ogt + Claude Sonnet 4.6）
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驗證 LLM 提案 action 含 "docker prune" 時，會路由到 ssh_provider 的
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ssh_docker_prune 工具，並帶上 trust_score=0.85 + host=instance label。
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"""
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from __future__ import annotations
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from types import SimpleNamespace
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from unittest.mock import AsyncMock, MagicMock, patch
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import pytest
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from src.plugins.mcp.interfaces import MCPToolResult
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from src.services.decision_manager import DecisionManager
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def _fake_incident(host: str = "192.168.0.110") -> SimpleNamespace:
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"""最小可用 Incident stub — 只有 _ssh_execute 用到的欄位"""
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signal = SimpleNamespace(labels={"instance": host})
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return SimpleNamespace(
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incident_id="INC-TEST-PRUNE",
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signals=[signal],
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)
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def _fake_token() -> SimpleNamespace:
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"""最小可用 DecisionToken stub"""
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return SimpleNamespace(
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state=None,
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proposal_data={},
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error=None,
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)
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@pytest.fixture
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def manager(monkeypatch):
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"""避免實例化重型依賴（openclaw / redis / knowledge_service）"""
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# get_knowledge_service 在 __init__ 內 import，patch 原始 module
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with patch("src.services.decision_manager.get_openclaw"), \
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patch("src.services.knowledge_service.get_knowledge_service"), \
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patch("src.plugins.mcp.providers.k8s_provider.K8sProvider"), \
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patch("src.plugins.mcp.providers.ssh_provider.SSHProvider"):
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mgr = DecisionManager()
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# 用 AsyncMock 攔截 SSH execute、token 存檔、telegram push
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mgr._ssh = MagicMock()
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mgr._ssh.execute = AsyncMock(
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return_value=MCPToolResult(success=True, execution_id="exec-1", output={"stdout": "pruned"})
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)
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mgr._save_token = AsyncMock()
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monkeypatch.setattr(
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"src.services.decision_manager._fire_and_forget",
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lambda *a, **k: None,
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)
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# _fire_and_forget 已經 patch 為 no-op，但這兩個函式被「呼叫」會建出 coroutine
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# 改用同步 stub 直接回 None 避免 unawaited coroutine warning
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monkeypatch.setattr(
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"src.services.decision_manager._push_decision_to_telegram",
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lambda *a, **k: None,
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)
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monkeypatch.setattr(
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"src.services.decision_manager._push_auto_repair_result",
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lambda *a, **k: None,
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)
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monkeypatch.setenv("SSH_MCP_ALLOWED_HOSTS", "192.168.0.110,192.168.0.188")
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return mgr
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class TestDockerPruneActionRouting:
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"""LLM action 字串 → ssh_docker_prune 工具路由"""
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@pytest.mark.asyncio
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async def test_ssh_docker_prune_action_routes_to_tool(self, manager):
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incident = _fake_incident()
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token = _fake_token()
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await manager._ssh_execute(
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incident=incident,
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token=token,
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action="ssh 192.168.0.110 'docker image prune -a -f && docker volume prune -f'",
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target="root",
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)
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manager._ssh.execute.assert_awaited_once()
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call = manager._ssh.execute.call_args
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assert call.kwargs["tool_name"] == "ssh_docker_prune", (
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f"expected ssh_docker_prune, got {call.kwargs.get('tool_name')}"
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)
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params = call.kwargs["parameters"]
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assert params["host"] == "192.168.0.110"
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# Group B 必須帶 trust_score >= 0.8
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assert params.get("trust_score", 0) >= 0.8
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@pytest.mark.asyncio
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async def test_short_form_docker_prune_routes(self, manager):
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"""簡寫格式（無 ssh prefix 但有 docker prune 關鍵字）也應路由"""
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# 注意：必須以 ssh 開頭才命中現有路由家族；非 ssh 開頭走別的分支
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incident = _fake_incident()
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token = _fake_token()
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await manager._ssh_execute(
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incident=incident,
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token=token,
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action="ssh wooo@192.168.0.110 docker prune -a",
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target="docker",
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)
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assert manager._ssh.execute.call_args.kwargs["tool_name"] == "ssh_docker_prune"
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@pytest.mark.asyncio
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async def test_docker_restart_still_routes_to_docker_restart(self, manager):
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"""加新分支不能誤傷既有 docker restart 路由"""
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incident = _fake_incident()
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token = _fake_token()
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await manager._ssh_execute(
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incident=incident,
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token=token,
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action="ssh 192.168.0.110 docker restart awoooi-api",
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target="awoooi-api",
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)
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# Codex 已把 _tool 改為 SSH MCP 全名（之前 short name 與 ssh_provider 不對齊）
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assert manager._ssh.execute.call_args.kwargs["tool_name"] == "ssh_docker_restart"
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@pytest.mark.asyncio
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async def test_diagnose_still_routes_to_ssh_diagnose(self, manager):
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"""加新分支不能誤傷 diagnose 路由"""
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incident = _fake_incident()
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token = _fake_token()
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await manager._ssh_execute(
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incident=incident,
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token=token,
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action="ssh 192.168.0.110 'df -h && free -h'",
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target="unknown",
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)
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assert manager._ssh.execute.call_args.kwargs["tool_name"] == "ssh_diagnose"
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83
apps/api/tests/test_ssh_provider_docker_prune.py
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83
apps/api/tests/test_ssh_provider_docker_prune.py
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@@ -0,0 +1,83 @@
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"""
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ssh_docker_prune 工具測試
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==========================
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ADR-068 飛輪 — disk full SOP（2026-05-02 ogt + Claude Sonnet 4.6）
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測試項目：
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- ssh_docker_prune 在 GROUP_B_TOOLS 白名單內
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- list_tools() 回傳含 ssh_docker_prune 且 schema 正確
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- _build_command() 產生包含 75% 磁碟守衛 + image/volume/builder prune 鏈
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- _build_command() 不會引入 FORBIDDEN_PATTERNS（rm -rf, $( ), backtick 等）
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"""
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from __future__ import annotations
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import asyncio
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from src.plugins.mcp.providers.ssh_provider import (
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DOCKER_PRUNE_DISK_GATE_PCT,
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GROUP_B_TOOLS,
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SSHProvider,
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)
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class TestDockerPruneToolRegistration:
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"""白名單與 list_tools() 註冊"""
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def test_in_group_b(self):
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assert "ssh_docker_prune" in GROUP_B_TOOLS
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def test_disk_gate_constant(self):
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# 守衛閾值合理（不會太低誤觸，不會太高永遠不跑）
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assert 50 <= DOCKER_PRUNE_DISK_GATE_PCT <= 90
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def test_listed_with_schema(self):
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provider = SSHProvider()
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tools = asyncio.run(provider.list_tools())
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prune = next((t for t in tools if t.name == "ssh_docker_prune"), None)
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assert prune is not None, "ssh_docker_prune not registered in list_tools()"
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assert prune.server_name == provider.name
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assert "host" in prune.input_schema["required"]
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assert "trust_score" in prune.input_schema["required"]
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class TestDockerPruneCommand:
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"""命令字串建構"""
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def _cmd(self) -> str:
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provider = SSHProvider()
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return provider._build_command("ssh_docker_prune", {"host": "192.168.0.110"})
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def test_includes_disk_gate(self):
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cmd = self._cmd()
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# 應該先檢查磁碟使用率，低於閾值就 skip
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assert "df --output=pcent" in cmd
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assert f"{DOCKER_PRUNE_DISK_GATE_PCT}" in cmd
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assert "skip" in cmd
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def test_includes_full_prune_chain(self):
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cmd = self._cmd()
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assert "docker image prune -a -f" in cmd
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assert "docker volume prune -f" in cmd
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assert "docker builder prune -a -f" in cmd
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def test_reports_disk_before_and_after(self):
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cmd = self._cmd()
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assert "DISK BEFORE" in cmd
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assert "DISK AFTER" in cmd
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def test_no_destructive_outside_docker(self):
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"""命令只該動 docker 子系統，不該有 rm -rf / 寫 /etc / 改 sudoers"""
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cmd = self._cmd()
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assert "rm -rf" not in cmd
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assert "/etc/" not in cmd
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assert "sudoers" not in cmd
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assert "authorized_keys" not in cmd
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def test_only_uses_safe_params(self):
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"""ssh_docker_prune 不接受 user-supplied 字串 params（只有 host/trust_score）"""
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provider = SSHProvider()
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tools = asyncio.run(provider.list_tools())
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prune = next(t for t in tools if t.name == "ssh_docker_prune")
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# schema 只有 host (string, whitelist-checked) + trust_score (number)
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assert set(prune.input_schema["properties"].keys()) == {"host", "trust_score"}
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