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27cdb3e | 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 | """
Docker Executor — Runs commands safely inside an isolated Docker container.
Provides a sandbox for executing agent-generated shell commands with
timeout enforcement and safety checking.
"""
from __future__ import annotations
import time
import subprocess
from dataclasses import dataclass, field
from typing import Optional, List
from executor.safety import CommandSafetyChecker, SafetyCheckResult
@dataclass
class ExecutionResult:
"""Result from executing a command in the Docker sandbox.
Attributes:
stdout: Standard output from the command.
stderr: Standard error from the command.
exit_code: Process exit code (0 = success).
timed_out: Whether the command exceeded the timeout.
blocked: Whether the command was blocked by safety checks.
block_reason: Reason the command was blocked, if applicable.
execution_time: Time taken to execute in seconds.
"""
stdout: str = ""
stderr: str = ""
exit_code: int = -1
timed_out: bool = False
blocked: bool = False
block_reason: str = ""
execution_time: float = 0.0
class DockerExecutor:
"""Executes shell commands inside a Docker container sandbox.
Each episode gets a fresh container. Commands are safety-checked
before execution and subject to a configurable timeout.
Usage:
executor = DockerExecutor(image="devops-sandbox:latest")
executor.start_container()
result = executor.execute("pip install flask")
executor.stop_container()
"""
def __init__(
self,
image: str = "devops-sandbox:latest",
timeout: int = 30,
container_name_prefix: str = "devops-sandbox",
use_local_fallback: bool = True,
) -> None:
"""Initialize the Docker executor.
Args:
image: Docker image to use for the sandbox.
timeout: Maximum seconds per command execution.
container_name_prefix: Prefix for container names.
use_local_fallback: If True, fall back to local subprocess
when Docker is not available (for development/testing).
"""
self.image = image
self.timeout = timeout
self.container_name_prefix = container_name_prefix
self.use_local_fallback = use_local_fallback
self.safety_checker = CommandSafetyChecker()
self._container_id: Optional[str] = None
self._docker_available: Optional[bool] = None
self._env_vars: dict = {}
@property
def docker_available(self) -> bool:
"""Check if Docker is available on the host."""
if self._docker_available is None:
try:
result = subprocess.run(
["docker", "info"],
capture_output=True, timeout=5,
)
self._docker_available = result.returncode == 0
except (FileNotFoundError, subprocess.TimeoutExpired):
self._docker_available = False
return self._docker_available
def start_container(self, scenario_setup_commands: List[str] | None = None) -> str:
"""Start a fresh Docker container for an episode.
Args:
scenario_setup_commands: Commands to run to set up the broken state.
Returns:
Container ID or 'local-fallback' if using local mode.
"""
self._env_vars = {}
if self.docker_available:
name = f"{self.container_name_prefix}-{int(time.time())}"
result = subprocess.run(
["docker", "run", "-d", "--name", name,
"--memory=512m", "--cpus=1",
self.image, "sleep", "3600"],
capture_output=True, text=True, timeout=10,
)
if result.returncode != 0:
if self.use_local_fallback:
self._container_id = "local-fallback"
self._run_setup_commands(scenario_setup_commands)
return self._container_id
raise RuntimeError(f"Failed to start container: {result.stderr}")
self._container_id = result.stdout.strip()
# Run setup commands
if scenario_setup_commands:
for cmd in scenario_setup_commands:
subprocess.run(
["docker", "exec", self._container_id, "bash", "-c", cmd],
capture_output=True, text=True, timeout=60,
)
return self._container_id
else:
self._container_id = "local-fallback"
self._run_setup_commands(scenario_setup_commands)
return self._container_id
def _run_setup_commands(self, commands: List[str] | None) -> None:
"""Run setup commands in local fallback mode."""
if not commands:
return
for cmd in commands:
try:
subprocess.run(
["bash", "-c", cmd],
capture_output=True, text=True, timeout=60,
cwd="/tmp",
)
except (subprocess.TimeoutExpired, Exception):
pass
def execute(self, command: str) -> ExecutionResult:
"""Execute a command in the sandbox.
Args:
command: Shell command to execute.
Returns:
ExecutionResult with stdout, stderr, exit_code, etc.
"""
# Safety check first
safety = self.safety_checker.check(command)
if not safety.is_safe:
return ExecutionResult(
stdout="",
stderr=f"BLOCKED: {safety.reason}",
exit_code=-1,
blocked=True,
block_reason=safety.reason,
)
# Track env var exports for local fallback
if command.strip().startswith("export "):
parts = command.strip()[7:].split("=", 1)
if len(parts) == 2:
self._env_vars[parts[0]] = parts[1]
start_time = time.time()
try:
if self._container_id and self._container_id != "local-fallback":
return self._execute_docker(command, start_time)
else:
return self._execute_local(command, start_time)
except subprocess.TimeoutExpired:
return ExecutionResult(
stdout="",
stderr="Command timed out",
exit_code=-1,
timed_out=True,
execution_time=self.timeout,
)
except Exception as e:
return ExecutionResult(
stdout="",
stderr=str(e),
exit_code=-1,
execution_time=time.time() - start_time,
)
def _execute_docker(self, command: str, start_time: float) -> ExecutionResult:
"""Execute command in Docker container."""
# Inject tracked environment variables
env_exports = ""
for k, v in self._env_vars.items():
env_exports += f"export {k}='{v}'; "
full_command = env_exports + command
result = subprocess.run(
["docker", "exec", self._container_id, "bash", "-c", full_command],
capture_output=True, text=True, timeout=self.timeout,
)
return ExecutionResult(
stdout=result.stdout[:5000],
stderr=result.stderr[:5000],
exit_code=result.returncode,
execution_time=time.time() - start_time,
)
def _execute_local(self, command: str, start_time: float) -> ExecutionResult:
"""Execute command locally (fallback for development)."""
import os
env = os.environ.copy()
env.update(self._env_vars)
# Handle PEP 668 in local fallback
if "pip install" in command and "--break-system-packages" not in command:
command = command.replace("pip install", "pip install --break-system-packages")
elif "pip3 install" in command and "--break-system-packages" not in command:
command = command.replace("pip3 install", "pip3 install --break-system-packages")
result = subprocess.run(
["bash", "-c", command],
capture_output=True, text=True,
timeout=self.timeout, cwd="/tmp", env=env,
)
return ExecutionResult(
stdout=result.stdout[:5000],
stderr=result.stderr[:5000],
exit_code=result.returncode,
execution_time=time.time() - start_time,
)
def stop_container(self) -> None:
"""Stop and remove the current container."""
if self._container_id and self._container_id != "local-fallback":
try:
subprocess.run(
["docker", "rm", "-f", self._container_id],
capture_output=True, timeout=10,
)
except Exception:
pass
self._container_id = None
self._env_vars = {}
def __del__(self) -> None:
"""Cleanup on garbage collection."""
self.stop_container()
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