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* Docker Manager - Container management for job execution
*
* Handles Docker container lifecycle, security configuration,
* and resource management for isolated job execution.
*
* Enhanced with comprehensive security measures and monitoring.
*
* Requirements: 4.1, 4.2, 4.3, 4.4, 4.5
*/
import { DockerConfig } from './config/types.js';
import { createLogger } from './utils/logger.js';
import { SecurityManager, SecurityConfig, SecurityViolation } from './security.js';
import { spawn, ChildProcess } from 'child_process';
import { promises as fs } from 'fs';
import { join } from 'path';
const logger = createLogger('docker');
export interface ContainerConfig {
image: string;
workDir: string;
environment: Record<string, string>;
volumeMounts: Array<{
hostPath: string;
containerPath: string;
readOnly: boolean;
}>;
}
export interface ExecutionOptions {
timeout?: number;
onOutput?: (output: string) => void;
}
export interface ExecutionResult {
exitCode: number;
output: string;
error?: string;
}
export class DockerManager {
private config: DockerConfig;
private securityManager: SecurityManager;
private activeContainers = new Set<string>();
private containerTempDirs = new Map<string, string>();
constructor(config: DockerConfig, securityConfig: SecurityConfig) {
this.config = config;
this.securityManager = new SecurityManager(securityConfig);
logger.info('Docker manager initialized with enhanced security');
}
/**
* Check if Docker is available and running
*/
async checkDockerAvailability(): Promise<boolean> {
try {
const result = await this.executeDockerCommand(['version', '--format', 'json']);
return result.exitCode === 0;
} catch (error) {
logger.error('Docker is not available:', error);
return false;
}
}
/**
* Pull Docker image
*/
async pullImage(image: string): Promise<void> {
logger.info(`Pulling Docker image: ${image}`);
try {
const result = await this.executeDockerCommand(['pull', image]);
if (result.exitCode !== 0) {
throw new Error(`Failed to pull image ${image}: ${result.error}`);
}
logger.info(`Successfully pulled image: ${image}`);
} catch (error) {
logger.error(`Failed to pull image ${image}:`, error);
throw error;
}
}
/**
* Create a Docker container with enhanced security configuration
*/
async createContainer(containerConfig: ContainerConfig): Promise<string> {
const containerId = `buildhive-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
logger.info(`Creating secure container: ${containerId}`);
try {
// Validate image security first
const imageViolations = await this.securityManager.validateImageSecurity(containerConfig.image);
if (imageViolations.some(v => v.severity === 'critical')) {
throw new Error(`Image ${containerConfig.image} failed security validation`);
}
// Validate container configuration
const configViolations = await this.securityManager.validateContainerConfig({
...containerConfig,
containerId,
memoryLimit: this.config.memoryLimit,
cpuLimit: this.config.cpuLimit,
networkMode: this.config.networkMode
});
if (configViolations.some(v => v.severity === 'critical')) {
throw new Error(`Container configuration failed security validation`);
}
// Create secure temporary directory
const tempDir = await this.securityManager.createSecureTempDir(containerId);
this.containerTempDirs.set(containerId, tempDir);
const dockerArgs = [
'create',
'--name', containerId,
// No --rm: we handle cleanup explicitly via stopContainer/removeContainer
];
// Add enhanced security arguments
const securityArgs = this.securityManager.generateSecureDockerArgs(containerId);
dockerArgs.push(...securityArgs);
// Add basic configuration
dockerArgs.push('--workdir', containerConfig.workDir);
// Add volume mounts with security validation
for (const mount of containerConfig.volumeMounts) {
// Use secure temp directory for writable mounts
const hostPath = mount.readOnly ? mount.hostPath : tempDir;
const mountStr = `${hostPath}:${mount.containerPath}${mount.readOnly ? ':ro' : ''}`;
dockerArgs.push('--volume', mountStr);
}
// Add environment variables
for (const [key, value] of Object.entries(containerConfig.environment)) {
dockerArgs.push('--env', `${key}=${value}`);
}
// Add the image and a keep-alive command so the container stays running
dockerArgs.push(containerConfig.image);
dockerArgs.push('tail', '-f', '/dev/null');
// Execute docker create command
const result = await this.executeDockerCommand(dockerArgs);
if (result.exitCode !== 0) {
throw new Error(`Failed to create container: ${result.error}`);
}
this.activeContainers.add(containerId);
logger.info(`Secure container created successfully: ${containerId}`);
return containerId;
} catch (error) {
logger.error(`Failed to create secure container ${containerId}:`, error);
// Cleanup temp directory on failure
const tempDir = this.containerTempDirs.get(containerId);
if (tempDir) {
await this.securityManager.cleanupSecureTempDir(tempDir);
this.containerTempDirs.delete(containerId);
}
throw error;
}
}
/**
* Start a Docker container with security monitoring
*/
async startContainer(containerId: string): Promise<void> {
logger.info(`Starting secure container: ${containerId}`);
try {
const result = await this.executeDockerCommand(['start', containerId]);
if (result.exitCode !== 0) {
throw new Error(`Failed to start container ${containerId}: ${result.error}`);
}
// Start security monitoring
await this.securityManager.startResourceMonitoring(containerId);
logger.info(`Secure container started successfully: ${containerId}`);
} catch (error) {
logger.error(`Failed to start secure container ${containerId}:`, error);
throw error;
}
}
/**
* Execute a command in a running container
*/
async executeCommand(
containerId: string,
command: string,
options: ExecutionOptions = {}
): Promise<ExecutionResult> {
logger.info(`Executing command in container ${containerId}: ${command}`);
try {
const dockerArgs = [
'exec',
'--interactive',
containerId,
'sh', '-c', command
];
const result = await this.executeDockerCommand(dockerArgs, {
timeout: options.timeout,
onOutput: options.onOutput
});
logger.info(`Command execution completed in container ${containerId} (exit code: ${result.exitCode})`);
return result;
} catch (error) {
logger.error(`Failed to execute command in container ${containerId}:`, error);
throw error;
}
}
/**
* Stop a running container
*/
async stopContainer(containerId: string, timeout: number = 10): Promise<void> {
logger.info(`Stopping container: ${containerId}`);
try {
const result = await this.executeDockerCommand(['stop', '--time', timeout.toString(), containerId]);
if (result.exitCode !== 0) {
logger.warn(`Failed to stop container gracefully, forcing: ${containerId}`);
await this.executeDockerCommand(['kill', containerId]);
}
logger.info(`Container stopped: ${containerId}`);
} catch (error) {
logger.error(`Failed to stop container ${containerId}:`, error);
throw error;
}
}
/**
* Remove a container with security cleanup
*/
async removeContainer(containerId: string): Promise<void> {
logger.info(`Removing secure container: ${containerId}`);
try {
// Stop security monitoring
this.securityManager.stopResourceMonitoring(containerId);
// First try to stop the container if it's running
await this.stopContainer(containerId);
// Remove the container
const result = await this.executeDockerCommand(['rm', '--force', containerId]);
if (result.exitCode !== 0) {
logger.warn(`Failed to remove container ${containerId}: ${result.error}`);
} else {
logger.info(`Container removed: ${containerId}`);
}
// Cleanup secure temp directory
const tempDir = this.containerTempDirs.get(containerId);
if (tempDir) {
await this.securityManager.cleanupSecureTempDir(tempDir);
this.containerTempDirs.delete(containerId);
}
this.activeContainers.delete(containerId);
} catch (error) {
logger.error(`Failed to remove secure container ${containerId}:`, error);
// Don't throw here, as this is cleanup
}
}
/**
* Copy file from container to host
*/
async copyFromContainer(containerId: string, containerPath: string, hostPath: string): Promise<void> {
logger.info(`Copying from container ${containerId}: ${containerPath} -> ${hostPath}`);
try {
// Ensure host directory exists
const hostDir = join(hostPath, '..');
await fs.mkdir(hostDir, { recursive: true });
const result = await this.executeDockerCommand([
'cp',
`${containerId}:${containerPath}`,
hostPath
]);
if (result.exitCode !== 0) {
throw new Error(`Failed to copy from container: ${result.error}`);
}
logger.info(`Successfully copied from container: ${containerPath}`);
} catch (error) {
logger.error(`Failed to copy from container ${containerId}:`, error);
throw error;
}
}
/**
* Get container logs
*/
async getContainerLogs(containerId: string): Promise<string> {
try {
const result = await this.executeDockerCommand(['logs', containerId]);
return result.output;
} catch (error) {
logger.error(`Failed to get logs for container ${containerId}:`, error);
return '';
}
}
/**
* Get security violations for monitoring
*/
getSecurityViolations(): SecurityViolation[] {
return this.securityManager.getViolations();
}
/**
* Get resource usage for a container
*/
async getResourceUsage(containerId: string) {
return await this.securityManager.getResourceUsage(containerId);
}
/**
* Clean up all active containers with security cleanup
*/
async cleanup(): Promise<void> {
logger.info('Cleaning up secure Docker manager...');
const containerIds = Array.from(this.activeContainers);
for (const containerId of containerIds) {
await this.removeContainer(containerId);
}
// Cleanup security manager
this.securityManager.cleanup();
this.activeContainers.clear();
this.containerTempDirs.clear();
logger.info('Secure Docker manager cleanup completed');
}
/**
* Execute a Docker command
*/
private async executeDockerCommand(
args: string[],
options: ExecutionOptions = {}
): Promise<ExecutionResult> {
return new Promise((resolve, reject) => {
const process = spawn('docker', args, {
stdio: ['pipe', 'pipe', 'pipe']
});
let output = '';
let error = '';
let timeoutId: NodeJS.Timeout | null = null;
// Set up timeout if specified
if (options.timeout) {
timeoutId = setTimeout(() => {
process.kill('SIGKILL');
reject(new Error(`Command timed out after ${options.timeout}ms`));
}, options.timeout);
}
// Collect stdout
process.stdout.on('data', (data: Buffer) => {
const chunk = data.toString();
output += chunk;
if (options.onOutput) {
options.onOutput(chunk);
}
});
// Collect stderr
process.stderr.on('data', (data: Buffer) => {
const chunk = data.toString();
error += chunk;
if (options.onOutput) {
options.onOutput(chunk);
}
});
// Handle process completion
process.on('close', (code: number | null) => {
if (timeoutId) {
clearTimeout(timeoutId);
}
resolve({
exitCode: code || 0,
output: output.trim(),
error: error.trim()
});
});
// Handle process errors
process.on('error', (err: Error) => {
if (timeoutId) {
clearTimeout(timeoutId);
}
reject(err);
});
});
}
} |