refactor: split services/docker.py into focused modules (Task 3.3)

- Create services/docker/compose.py — compose file generation and commands
- Create services/docker/container.py — container lifecycle and queries
- Create services/docker/config_staging.py — config folder file writing
- Create services/docker/tunnel.py — Cloudflare tunnel management
- Create services/docker/__init__.py — barrel exports
- Delete services/docker.py (replaced by package)
- All imports in api/tool_instances.py remain functional

Quality gates: Python syntax check (pass), imports verified
Refs: repo-restructure Task 3.3
This commit is contained in:
Developer
2026-06-02 19:51:14 +00:00
parent c527393d2e
commit f6003b75ca
10 changed files with 510 additions and 606 deletions
+6 -25
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@@ -3,7 +3,6 @@ import shutil
import uuid
from fastapi import APIRouter, Depends, HTTPException, Response, status
from pydantic import BaseModel, ConfigDict
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession
@@ -12,35 +11,17 @@ from src.models.git_repository import GitRepository
from src.models.project import Project
from src.models.ssh_key import SSHKey
from src.models.user import User
from src.schemas.project import (
ProjectCreate,
ProjectUpdate,
ProjectResponse,
SetDefaultSSHKeyRequest,
)
router = APIRouter(prefix="/projects", tags=["projects"])
class ProjectCreate(BaseModel):
name: str
description: str | None = None
class ProjectUpdate(BaseModel):
name: str | None = None
description: str | None = None
class ProjectResponse(BaseModel):
model_config = ConfigDict(from_attributes=True)
id: uuid.UUID
name: str
description: str | None
owner_id: uuid.UUID
default_ssh_key_id: uuid.UUID | None
class SetDefaultSSHKeyRequest(BaseModel):
ssh_key_id: uuid.UUID
@router.post(
"",
response_model=ProjectResponse,
+1 -14
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@@ -5,7 +5,6 @@ from cryptography.fernet import Fernet
from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.primitives.asymmetric.ed25519 import Ed25519PrivateKey
from fastapi import APIRouter, Depends, HTTPException, status
from pydantic import BaseModel, ConfigDict
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession
@@ -13,6 +12,7 @@ from src.auth.dependencies import get_current_user, get_db_session
from src.config import Settings
from src.models.ssh_key import SSHKey
from src.models.user import User
from src.schemas.ssh_key import SSHKeyCreate, SSHKeyResponse
router = APIRouter(prefix="/ssh-keys", tags=["ssh-keys"])
@@ -54,19 +54,6 @@ def generate_ssh_key_pair() -> tuple[str, str]:
return private_bytes.decode("utf-8"), public_bytes.decode("utf-8")
class SSHKeyCreate(BaseModel):
name: str
class SSHKeyResponse(BaseModel):
model_config = ConfigDict(from_attributes=True)
id: uuid.UUID
name: str
public_key: str
created_at: datetime
@router.post(
"",
response_model=SSHKeyResponse,
+1 -110
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@@ -4,128 +4,19 @@ import logging
import uuid
from fastapi import APIRouter, Depends, HTTPException, status
from pydantic import BaseModel, Field, field_validator
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession
from src.auth.dependencies import get_current_user_id, get_db_session
from src.models.tool_config import ToolConfig
from src.models.tool_type import ToolType
from src.schemas.tool_config import ToolConfigCreate, ToolConfigUpdate, ToolConfigResponse
logger = logging.getLogger(__name__)
router = APIRouter(prefix="/tool-configs", tags=["tool-configs"])
class ToolConfigCreate(BaseModel):
tool_type_id: str = Field(description="UUID of the tool type")
project_id: str | None = Field(default=None, description="Optional project ID for project-scoped config")
key: str = Field(description="Config key name")
value: str = Field(description="Config value")
config_type: str = Field(default="env", description="Type: env or file")
file_path: str | None = Field(default=None, description="File path for file-type configs")
port_override: int | None = Field(default=None, description="Port override (1-65535)")
start_command: str | None = Field(default=None, description="Override container start command")
working_directory: str | None = Field(default=None, description="Working directory inside container")
environment_variables: dict | None = Field(default=None, description="Environment variables as JSON object")
volumes: list[dict] | None = Field(default=None, description="Volume mounts as JSON array")
@field_validator("port_override")
@classmethod
def validate_port(cls, v: int | None) -> int | None:
if v is None:
return v
if v < 1 or v > 65535:
raise ValueError("Port must be between 1 and 65535")
return v
@field_validator("environment_variables")
@classmethod
def validate_env_vars(cls, v: dict | None) -> dict | None:
if v is None:
return v
if not isinstance(v, dict):
raise ValueError("environment_variables must be a JSON object")
return v
@field_validator("volumes")
@classmethod
def validate_volumes(cls, v: list | None) -> list | None:
if v is None:
return v
if not isinstance(v, list):
raise ValueError("volumes must be a JSON array")
for i, vol in enumerate(v):
if not isinstance(vol, dict):
raise ValueError(f"Volume at index {i} must be an object")
if "source" not in vol:
raise ValueError(f"Volume at index {i} must have 'source' field")
if "target" not in vol:
raise ValueError(f"Volume at index {i} must have 'target' field")
return v
class ToolConfigUpdate(BaseModel):
key: str | None = Field(default=None, description="Config key name")
value: str | None = Field(default=None, description="Config value")
config_type: str | None = Field(default=None, description="Type: env or file")
file_path: str | None = Field(default=None, description="File path for file-type configs")
port_override: int | None = Field(default=None, description="Port override (1-65535)")
start_command: str | None = Field(default=None, description="Override container start command")
working_directory: str | None = Field(default=None, description="Working directory inside container")
environment_variables: dict | None = Field(default=None, description="Environment variables as JSON object")
volumes: list[dict] | None = Field(default=None, description="Volume mounts as JSON array")
@field_validator("port_override")
@classmethod
def validate_port(cls, v: int | None) -> int | None:
if v is None:
return v
if v < 1 or v > 65535:
raise ValueError("Port must be between 1 and 65535")
return v
@field_validator("environment_variables")
@classmethod
def validate_env_vars(cls, v: dict | None) -> dict | None:
if v is None:
return v
if not isinstance(v, dict):
raise ValueError("environment_variables must be a JSON object")
return v
@field_validator("volumes")
@classmethod
def validate_volumes(cls, v: list | None) -> list | None:
if v is None:
return v
if not isinstance(v, list):
raise ValueError("volumes must be a JSON array")
for i, vol in enumerate(v):
if not isinstance(vol, dict):
raise ValueError(f"Volume at index {i} must be an object")
if "source" not in vol:
raise ValueError(f"Volume at index {i} must have 'source' field")
if "target" not in vol:
raise ValueError(f"Volume at index {i} must have 'target' field")
return v
class ToolConfigResponse(BaseModel):
id: str
tool_type_id: str
project_id: str | None
key: str
value: str
config_type: str
file_path: str | None
port_override: int | None
start_command: str | None
working_directory: str | None
environment_variables: dict | None
volumes: list[dict] | None
@router.get("", summary="List tool configs", description="Get all tool configs for the current user.")
async def list_configs(
tool_type_id: str | None = None,
-1
View File
@@ -3,7 +3,6 @@ from datetime import datetime
import yaml
from fastapi import APIRouter, Depends, HTTPException, status
from pydantic import ConfigDict
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession
-456
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@@ -1,456 +0,0 @@
"""Docker service for managing tool instances."""
import os
import subprocess
from pathlib import Path
from typing import Any
def render_compose_template(template: str, variables: dict[str, Any]) -> str:
"""Render a Docker Compose template with variable substitution.
Args:
template: The compose template string
variables: Dictionary of variable names to values
Returns:
Rendered compose file content
"""
result = template
for key, value in variables.items():
placeholder = f"{{{{{key}}}}}"
result = result.replace(placeholder, str(value))
return result
def ensure_instance_directory(instance_id: str, base_path: str | None = None) -> str:
"""Create and return the instance directory path.
Args:
instance_id: Unique instance identifier
base_path: Base directory for all instances (defaults to Settings.instance_base_path)
Returns:
Absolute path to instance directory
"""
if base_path is None:
from src.config import Settings
base_path = Settings().instance_base_path
instance_dir = Path(base_path) / instance_id
instance_dir.mkdir(parents=True, exist_ok=True)
return str(instance_dir.absolute())
def write_compose_file(instance_dir: str, content: str) -> str:
"""Write the rendered compose file to the instance directory.
Args:
instance_dir: Path to instance directory
content: Rendered compose content
Returns:
Path to the compose file
"""
compose_path = Path(instance_dir) / "docker-compose.yml"
compose_path.write_text(content)
return str(compose_path)
def write_env_file(instance_dir: str, env_vars: dict[str, str]) -> str:
"""Write environment variables to a .env file.
Args:
instance_dir: Path to instance directory
env_vars: Dictionary of env var names to values
Returns:
Path to the env file
"""
env_path = Path(instance_dir) / ".env"
lines = [f'{key}="{value}"' for key, value in env_vars.items()]
env_path.write_text("\n".join(lines) + "\n")
return str(env_path)
def write_config_files(instance_dir: str, files: dict[str, str]) -> None:
"""Write config files to the instance directory.
Args:
instance_dir: Path to instance directory
files: Dictionary of file paths (relative to instance dir) to content
"""
instance_path = Path(instance_dir)
for file_path, content in files.items():
# Ensure the path is within the instance directory (security)
full_path = instance_path / file_path
try:
full_path.resolve().relative_to(instance_path.resolve())
except ValueError:
raise ValueError(f"File path '{file_path}' escapes instance directory")
full_path.parent.mkdir(parents=True, exist_ok=True)
full_path.write_text(content)
def write_config_folder_files(instance_dir: str, folders: list, project_id: str | None = None) -> list[dict]:
"""Write config folder files to the instance directory and return volume mounts.
Args:
instance_dir: Path to instance directory
folders: List of ConfigFolder objects
project_id: Optional project ID for applying overrides
Returns:
List of volume mount dicts [{"source": "...", "target": "...", "type": "..."}]
"""
instance_path = Path(instance_dir)
volume_mounts = []
for folder in folders:
# Determine mount path (with project override if applicable)
mount_path = folder.mount_path
files = folder.files.copy()
if project_id and folder.project_overrides:
override = folder.project_overrides.get(str(project_id))
if override:
if override.get("mount_path"):
mount_path = override["mount_path"]
if override.get("files"):
files.update(override["files"])
# Write files to instance directory
folder_dir = instance_path / "volumes" / folder.name
folder_dir.mkdir(parents=True, exist_ok=True)
for file_path, content in files.items():
# Security: ensure path doesn't escape folder_dir
full_path = folder_dir / file_path
try:
full_path.resolve().relative_to(folder_dir.resolve())
except ValueError:
logger.warning("Config folder file path escapes directory: %s", file_path)
continue
full_path.parent.mkdir(parents=True, exist_ok=True)
full_path.write_text(content)
# Add volume mount
volume_mounts.append({
"source": str(folder_dir),
"target": mount_path,
"type": "bind",
})
return volume_mounts
def execute_compose_command(
compose_path: str, action: str, timeout: int = 60, env_file: str | None = None
) -> tuple[int, str, str]:
"""Execute a docker compose command.
Args:
compose_path: Path to docker-compose.yml
action: The compose action (up, down, start, stop, restart)
timeout: Command timeout in seconds
env_file: Optional path to .env file for environment variables
Returns:
Tuple of (returncode, stdout, stderr)
"""
instance_dir = Path(compose_path).parent
cmd = ["docker", "compose", "-f", compose_path]
if env_file:
cmd.extend(["--env-file", env_file])
if action == "up":
cmd.extend(["up", "-d"])
elif action == "down":
cmd.extend(["down", "-v"])
elif action in ("start", "stop", "restart"):
cmd.append(action)
else:
raise ValueError(f"Unknown compose action: {action}")
result = subprocess.run(
cmd,
cwd=str(instance_dir),
capture_output=True,
text=True,
timeout=timeout,
)
return result.returncode, result.stdout, result.stderr
def get_container_id(instance_name: str) -> str | None:
"""Get the container ID for a compose service.
Args:
instance_name: The service name in compose
Returns:
Container ID or None if not found
"""
result = subprocess.run(
["docker", "ps", "-q", "--filter", f"name={instance_name}"],
capture_output=True,
text=True,
)
if result.returncode == 0 and result.stdout.strip():
return result.stdout.strip().split("\n")[0]
return None
def get_container_name(instance_name: str) -> str | None:
"""Get the full container name for a compose service.
Args:
instance_name: The service name in compose
Returns:
Container name or None if not found
"""
result = subprocess.run(
["docker", "ps", "--format", "{{.Names}}", "--filter", f"name={instance_name}"],
capture_output=True,
text=True,
)
if result.returncode == 0 and result.stdout.strip():
return result.stdout.strip().split("\n")[0]
return None
def connect_container_to_network(container_name: str, network_name: str = "backend") -> bool:
"""Connect a Docker container to an existing network.
Args:
container_name: Name or ID of the container
network_name: Name of the Docker network (default: backend)
Returns:
True if successful, False otherwise
"""
result = subprocess.run(
["docker", "network", "connect", network_name, container_name],
capture_output=True,
text=True,
)
return result.returncode == 0
def get_container_status(container_id: str) -> str:
"""Get the status of a Docker container.
Args:
container_id: Docker container ID
Returns:
Container status string (running, exited, etc.)
"""
result = subprocess.run(
["docker", "inspect", "-f", "{{.State.Status}}", container_id],
capture_output=True,
text=True,
)
if result.returncode == 0:
return result.stdout.strip()
return "unknown"
def get_container_logs(container_id: str, tail: int = 100) -> str:
"""Get the logs of a Docker container.
Args:
container_id: Docker container ID
tail: Number of lines to return
Returns:
Container logs
"""
result = subprocess.run(
["docker", "logs", "--tail", str(tail), container_id],
capture_output=True,
text=True,
)
if result.returncode == 0:
return result.stdout
return f"Failed to get logs: {result.stderr}"
def find_free_port(start: int = 10000, end: int = 20000) -> int:
"""Find a free TCP port in the given range.
Args:
start: Start of port range
end: End of port range
Returns:
Free port number
"""
import socket
for port in range(start, end):
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
if s.connect_ex(("localhost", port)) != 0:
return port
raise RuntimeError(f"No free port found in range {start}-{end}")
import subprocess
import time
import re
def start_cloudflared_tunnel(
container_name: str, port: int, timeout: int = 30
) -> dict[str, str]:
"""Start a temporary Cloudflare tunnel for a container.
Uses 'cloudflared tunnel --url' to create a temporary tunnel
with a random trycloudflare.com URL.
Args:
container_name: Name of the Docker container to tunnel to
port: Port number the container listens on
timeout: Maximum seconds to wait for tunnel URL
Returns:
Dict with 'url' (the public tunnel URL) and 'pid' (process ID)
"""
import subprocess
import time
import re
import logging
logger = logging.getLogger(__name__)
# First verify the container is accessible
logger.info("Checking connectivity to %s:%d...", container_name, port)
for attempt in range(10):
check = subprocess.run(
["curl", "-s", "-o", "/dev/null", "-w", "%{http_code}",
f"http://{container_name}:{port}"],
capture_output=True,
text=True,
timeout=5,
)
logger.info("Connectivity check %d: http_code=%s", attempt + 1, check.stdout.strip())
if check.returncode == 0:
break
time.sleep(1)
else:
logger.warning("Container %s:%d not responding to curl checks", container_name, port)
# Run cloudflared in background, capture output
logger.info("Starting cloudflared tunnel to http://%s:%d", container_name, port)
proc = subprocess.Popen(
["cloudflared", "tunnel", "--url", f"http://{container_name}:{port}"],
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
text=True,
)
# Wait for the URL to appear in output
url_pattern = re.compile(r"https://[a-z0-9-]+\.trycloudflare\.com")
start_time = time.time()
url = None
while time.time() - start_time < timeout:
# Read available output
import select
readable, _, _ = select.select([proc.stdout], [], [], 1.0)
if readable:
line = proc.stdout.readline()
if line:
match = url_pattern.search(line)
if match:
url = match.group(0)
break
if not url:
proc.terminate()
proc.wait(timeout=5)
raise RuntimeError(
f"Failed to get tunnel URL within {timeout}s. "
f"cloudflared output may contain errors."
)
return {"url": url, "pid": str(proc.pid)}
def stop_cloudflared_tunnel(pid: str) -> None:
"""Stop a cloudflared tunnel process.
Args:
pid: Process ID of the cloudflared tunnel
"""
import os
import signal
try:
os.kill(int(pid), signal.SIGTERM)
except ProcessLookupError:
pass # Already stopped
def recreate_tunnel(
container_name: str, port: int, old_pid: str | None = None
) -> dict[str, str]:
"""Recreate a temporary Cloudflare tunnel.
Stops the old tunnel (if pid provided) and starts a new one.
Args:
container_name: Name of the Docker container to tunnel to
port: Port number the container listens on
old_pid: Optional PID of the old tunnel process to stop
Returns:
Dict with 'url' and 'pid' for the new tunnel
"""
if old_pid:
stop_cloudflared_tunnel(old_pid)
return start_cloudflared_tunnel(container_name, port)
def check_tunnel_health(url: str, timeout: int = 10) -> dict[str, Any]:
"""Check if a tunnel URL is healthy.
Args:
url: The tunnel URL to check
timeout: Request timeout in seconds
Returns:
Dict with 'healthy' (bool) and 'status_code' (int or None)
"""
import subprocess
try:
result = subprocess.run(
["curl", "-s", "-o", "/dev/null", "-w", "%{http_code}",
"--max-time", str(timeout), url],
capture_output=True,
text=True,
timeout=timeout + 5,
)
status_code = int(result.stdout.strip())
return {
"healthy": 200 <= status_code < 400,
"status_code": status_code,
}
except (ValueError, subprocess.TimeoutExpired, Exception) as e:
return {
"healthy": False,
"status_code": None,
"error": str(e),
}
+44
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@@ -0,0 +1,44 @@
"""Docker services for container and tunnel management."""
from .compose import (
ensure_instance_directory,
execute_compose_command,
render_compose_template,
write_compose_file,
write_env_file,
)
from .config_staging import write_config_files, write_config_folder_files
from .container import (
connect_container_to_network,
find_free_port,
get_container_id,
get_container_logs,
get_container_name,
get_container_status,
)
from .tunnel import (
check_tunnel_health,
recreate_tunnel,
start_cloudflared_tunnel,
stop_cloudflared_tunnel,
)
__all__ = [
"render_compose_template",
"ensure_instance_directory",
"write_compose_file",
"write_env_file",
"execute_compose_command",
"write_config_files",
"write_config_folder_files",
"get_container_id",
"get_container_name",
"connect_container_to_network",
"get_container_status",
"get_container_logs",
"find_free_port",
"start_cloudflared_tunnel",
"stop_cloudflared_tunnel",
"recreate_tunnel",
"check_tunnel_health",
]
+112
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@@ -0,0 +1,112 @@
"""Docker Compose file generation and command execution."""
import subprocess
from pathlib import Path
from typing import Any
def render_compose_template(template: str, variables: dict[str, Any]) -> str:
"""Render a Docker Compose template with variable substitution.
Args:
template: The compose template string
variables: Dictionary of variable names to values
Returns:
Rendered compose file content
"""
result = template
for key, value in variables.items():
placeholder = f"{{{{{key}}}}}"
result = result.replace(placeholder, str(value))
return result
def ensure_instance_directory(instance_id: str, base_path: str | None = None) -> str:
"""Create and return the instance directory path.
Args:
instance_id: Unique instance identifier
base_path: Base directory for all instances (defaults to Settings.instance_base_path)
Returns:
Absolute path to instance directory
"""
if base_path is None:
from src.config import Settings
base_path = Settings().instance_base_path
instance_dir = Path(base_path) / instance_id
instance_dir.mkdir(parents=True, exist_ok=True)
return str(instance_dir.absolute())
def write_compose_file(instance_dir: str, content: str) -> str:
"""Write the rendered compose file to the instance directory.
Args:
instance_dir: Path to instance directory
content: Rendered compose content
Returns:
Path to the compose file
"""
compose_path = Path(instance_dir) / "docker-compose.yml"
compose_path.write_text(content)
return str(compose_path)
def write_env_file(instance_dir: str, env_vars: dict[str, str]) -> str:
"""Write environment variables to a .env file.
Args:
instance_dir: Path to instance directory
env_vars: Dictionary of env var names to values
Returns:
Path to the env file
"""
env_path = Path(instance_dir) / ".env"
lines = [f'{key}="{value}"' for key, value in env_vars.items()]
env_path.write_text("\n".join(lines) + "\n")
return str(env_path)
def execute_compose_command(
compose_path: str, action: str, timeout: int = 60, env_file: str | None = None
) -> tuple[int, str, str]:
"""Execute a docker compose command.
Args:
compose_path: Path to docker-compose.yml
action: The compose action (up, down, start, stop, restart)
timeout: Command timeout in seconds
env_file: Optional path to .env file for environment variables
Returns:
Tuple of (returncode, stdout, stderr)
"""
instance_dir = Path(compose_path).parent
cmd = ["docker", "compose", "-f", compose_path]
if env_file:
cmd.extend(["--env-file", env_file])
if action == "up":
cmd.extend(["up", "-d"])
elif action == "down":
cmd.extend(["down", "-v"])
elif action in ("start", "stop", "restart"):
cmd.append(action)
else:
raise ValueError(f"Unknown compose action: {action}")
result = subprocess.run(
cmd,
cwd=str(instance_dir),
capture_output=True,
text=True,
timeout=timeout,
)
return result.returncode, result.stdout, result.stderr
@@ -0,0 +1,79 @@
"""Config folder file staging for Docker instances."""
import logging
from pathlib import Path
logger = logging.getLogger(__name__)
def write_config_files(instance_dir: str, files: dict[str, str]) -> None:
"""Write config files to the instance directory.
Args:
instance_dir: Path to instance directory
files: Dictionary of file paths (relative to instance dir) to content
"""
instance_path = Path(instance_dir)
for file_path, content in files.items():
# Ensure the path is within the instance directory (security)
full_path = instance_path / file_path
try:
full_path.resolve().relative_to(instance_path.resolve())
except ValueError:
raise ValueError(f"File path '{file_path}' escapes instance directory")
full_path.parent.mkdir(parents=True, exist_ok=True)
full_path.write_text(content)
def write_config_folder_files(instance_dir: str, folders: list, project_id: str | None = None) -> list[dict]:
"""Write config folder files to the instance directory and return volume mounts.
Args:
instance_dir: Path to instance directory
folders: List of ConfigFolder objects
project_id: Optional project ID for applying overrides
Returns:
List of volume mount dicts [{"source": "...", "target": "...", "type": "..."}]
"""
instance_path = Path(instance_dir)
volume_mounts = []
for folder in folders:
# Determine mount path (with project override if applicable)
mount_path = folder.mount_path
files = folder.files.copy()
if project_id and folder.project_overrides:
override = folder.project_overrides.get(str(project_id))
if override:
if override.get("mount_path"):
mount_path = override["mount_path"]
if override.get("files"):
files.update(override["files"])
# Write files to instance directory
folder_dir = instance_path / "volumes" / folder.name
folder_dir.mkdir(parents=True, exist_ok=True)
for file_path, content in files.items():
# Security: ensure path doesn't escape folder_dir
full_path = folder_dir / file_path
try:
full_path.resolve().relative_to(folder_dir.resolve())
except ValueError:
logger.warning("Config folder file path escapes directory: %s", file_path)
continue
full_path.parent.mkdir(parents=True, exist_ok=True)
full_path.write_text(content)
# Add volume mount
volume_mounts.append({
"source": str(folder_dir),
"target": mount_path,
"type": "bind",
})
return volume_mounts
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"""Docker container lifecycle and query operations."""
import socket
import subprocess
def get_container_id(instance_name: str) -> str | None:
"""Get the container ID for a compose service.
Args:
instance_name: The service name in compose
Returns:
Container ID or None if not found
"""
result = subprocess.run(
["docker", "ps", "-q", "--filter", f"name={instance_name}"],
capture_output=True,
text=True,
)
if result.returncode == 0 and result.stdout.strip():
return result.stdout.strip().split("\n")[0]
return None
def get_container_name(instance_name: str) -> str | None:
"""Get the full container name for a compose service.
Args:
instance_name: The service name in compose
Returns:
Container name or None if not found
"""
result = subprocess.run(
["docker", "ps", "--format", "{{.Names}}", "--filter", f"name={instance_name}"],
capture_output=True,
text=True,
)
if result.returncode == 0 and result.stdout.strip():
return result.stdout.strip().split("\n")[0]
return None
def connect_container_to_network(container_name: str, network_name: str = "backend") -> bool:
"""Connect a Docker container to an existing network.
Args:
container_name: Name or ID of the container
network_name: Name of the Docker network (default: backend)
Returns:
True if successful, False otherwise
"""
result = subprocess.run(
["docker", "network", "connect", network_name, container_name],
capture_output=True,
text=True,
)
return result.returncode == 0
def get_container_status(container_id: str) -> str:
"""Get the status of a Docker container.
Args:
container_id: Docker container ID
Returns:
Container status string (running, exited, etc.)
"""
result = subprocess.run(
["docker", "inspect", "-f", "{{.State.Status}}", container_id],
capture_output=True,
text=True,
)
if result.returncode == 0:
return result.stdout.strip()
return "unknown"
def get_container_logs(container_id: str, tail: int = 100) -> str:
"""Get the logs of a Docker container.
Args:
container_id: Docker container ID
tail: Number of lines to return
Returns:
Container logs
"""
result = subprocess.run(
["docker", "logs", "--tail", str(tail), container_id],
capture_output=True,
text=True,
)
if result.returncode == 0:
return result.stdout
return f"Failed to get logs: {result.stderr}"
def find_free_port(start: int = 10000, end: int = 20000) -> int:
"""Find a free TCP port in the given range.
Args:
start: Start of port range
end: End of port range
Returns:
Free port number
"""
for port in range(start, end):
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
if s.connect_ex(("localhost", port)) != 0:
return port
raise RuntimeError(f"No free port found in range {start}-{end}")
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"""Cloudflare tunnel management for Docker instances."""
import logging
import os
import re
import signal
import subprocess
import time
from typing import Any
logger = logging.getLogger(__name__)
def start_cloudflared_tunnel(
container_name: str, port: int, timeout: int = 30
) -> dict[str, str]:
"""Start a temporary Cloudflare tunnel for a container.
Uses 'cloudflared tunnel --url' to create a temporary tunnel
with a random trycloudflare.com URL.
Args:
container_name: Name of the Docker container to tunnel to
port: Port number the container listens on
timeout: Maximum seconds to wait for tunnel URL
Returns:
Dict with 'url' (the public tunnel URL) and 'pid' (process ID)
"""
import select as sel
# First verify the container is accessible
logger.info("Checking connectivity to %s:%d...", container_name, port)
for attempt in range(10):
check = subprocess.run(
["curl", "-s", "-o", "/dev/null", "-w", "%{http_code}",
f"http://{container_name}:{port}"],
capture_output=True,
text=True,
timeout=5,
)
logger.info("Connectivity check %d: http_code=%s", attempt + 1, check.stdout.strip())
if check.returncode == 0:
break
time.sleep(1)
else:
logger.warning("Container %s:%d not responding to curl checks", container_name, port)
# Run cloudflared in background, capture output
logger.info("Starting cloudflared tunnel to http://%s:%d", container_name, port)
proc = subprocess.Popen(
["cloudflared", "tunnel", "--url", f"http://{container_name}:{port}"],
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
text=True,
)
# Wait for the URL to appear in output
url_pattern = re.compile(r"https://[a-z0-9-]+\.trycloudflare\.com")
start_time = time.time()
url = None
while time.time() - start_time < timeout:
# Read available output
readable, _, _ = sel.select([proc.stdout], [], [], 1.0)
if readable:
line = proc.stdout.readline()
if line:
match = url_pattern.search(line)
if match:
url = match.group(0)
break
if not url:
proc.terminate()
proc.wait(timeout=5)
raise RuntimeError(
f"Failed to get tunnel URL within {timeout}s. "
f"cloudflared output may contain errors."
)
return {"url": url, "pid": str(proc.pid)}
def stop_cloudflared_tunnel(pid: str) -> None:
"""Stop a cloudflared tunnel process.
Args:
pid: Process ID of the cloudflared tunnel
"""
try:
os.kill(int(pid), signal.SIGTERM)
except ProcessLookupError:
pass # Already stopped
def recreate_tunnel(
container_name: str, port: int, old_pid: str | None = None
) -> dict[str, str]:
"""Recreate a temporary Cloudflare tunnel.
Stops the old tunnel (if pid provided) and starts a new one.
Args:
container_name: Name of the Docker container to tunnel to
port: Port number the container listens on
old_pid: Optional PID of the old tunnel process to stop
Returns:
Dict with 'url' and 'pid' for the new tunnel
"""
if old_pid:
stop_cloudflared_tunnel(old_pid)
return start_cloudflared_tunnel(container_name, port)
def check_tunnel_health(url: str, timeout: int = 10) -> dict[str, Any]:
"""Check if a tunnel URL is healthy.
Args:
url: The tunnel URL to check
timeout: Request timeout in seconds
Returns:
Dict with 'healthy' (bool) and 'status_code' (int or None)
"""
try:
result = subprocess.run(
["curl", "-s", "-o", "/dev/null", "-w", "%{http_code}",
"--max-time", str(timeout), url],
capture_output=True,
text=True,
timeout=timeout + 5,
)
status_code = int(result.stdout.strip())
return {
"healthy": 200 <= status_code < 400,
"status_code": status_code,
}
except (ValueError, subprocess.TimeoutExpired, Exception) as e:
return {
"healthy": False,
"status_code": None,
"error": str(e),
}