Ansible MCP Server

Instructions

Implementation Reference

• src/sysoperator/index.ts:106-110 (registration)

  Registers the 'aws_cloudformation' tool in the toolDefinitions map, linking it to its description, input schema, and handler function.

  aws_cloudformation: {
    description: 'Manage AWS CloudFormation stacks',
    schema: aws.CloudFormationSchema,
    handler: aws.cloudFormationOperations,
  },

• src/sysoperator/operations/aws.ts:434-514 (handler)

  Handler function for 'aws_cloudformation' tool. Validates input, generates an Ansible playbook dynamically for actions like list/create/update/delete CloudFormation stacks, handles template files, and executes via Ansible.

  export async function cloudFormationOperations(args: CloudFormationOptions): Promise<string> {
    await verifyAwsCredentials();
  
    const { action, region, stackName, templateBody, templateUrl, parameters, capabilities, tags } = args;
  
    const tempFiles: { filename: string, content: string }[] = [];
    let templateParam = '';
  
    if (templateBody) {
      // Prepare template body to be written to a temp file
      tempFiles.push({ filename: 'template.cfn', content: templateBody });
      templateParam = 'template: "template.cfn"'; // Reference the temp file name
    } else if (templateUrl) {
      templateParam = `template_url: "${templateUrl}"`;
    } else if (action === 'create' || action === 'update') {
      // Template is required for create/update
      throw new AnsibleError('Either templateBody or templateUrl must be provided for CloudFormation create/update actions.');
    }
  
    let playbookContent = `---
  - name: AWS CloudFormation ${action} operation
    hosts: localhost
    connection: local
    gather_facts: no
    tasks:`;
    
    switch (action) {
      case 'list':
        playbookContent += `
      - name: List CloudFormation stacks
        amazon.aws.cloudformation_info:
          region: "${region}"
        register: cfn_info
      
      - name: Display stacks
        debug:
          var: cfn_info.stacks`;
        break;
        
      case 'create':
      case 'update':
        playbookContent += `
      - name: ${action === 'create' ? 'Create' : 'Update'} CloudFormation stack
        amazon.aws.cloudformation:
          region: "${region}"
          stack_name: "${stackName}"
          state: present
          ${templateParam} # Use the determined template parameter
  ${formatYamlParams({
    template_parameters: parameters,
    capabilities,
    tags
  })}
        register: cfn_result
      
      - name: Display stack outputs/result
        debug:
          var: cfn_result`;
        break;
        
      case 'delete':
        playbookContent += `
      - name: Delete CloudFormation stack
        amazon.aws.cloudformation:
          region: "${region}"
          stack_name: "${stackName}"
          state: absent
        register: cfn_delete
        
      - name: Display deletion result
        debug:
          var: cfn_delete`;
        break;
        
      default:
        throw new AnsibleError(`Unsupported CloudFormation action: ${action}`);
    }
    
    // Execute the generated playbook, passing template body if needed
    return executeAwsPlaybook(`cloudformation-${action}`, playbookContent, '', tempFiles);
  }

• src/sysoperator/common/types.ts:17-100 (schema)

  Defines the input schema (CloudFormationSchema) and action enum for validating tool arguments, including required region and optional parameters for CloudFormation operations.

  export const CloudFormationActionEnum = z.enum(['list', 'create', 'update', 'delete']);
  export type CloudFormationAction = z.infer<typeof CloudFormationActionEnum>;
  
  export const IAMActionEnum = z.enum(['list_roles', 'list_policies', 'create_role', 'create_policy', 'delete_role', 'delete_policy']);
  export type IAMAction = z.infer<typeof IAMActionEnum>;
  
  export const RDSActionEnum = z.enum(['list', 'create', 'delete', 'start', 'stop']);
  export type RDSAction = z.infer<typeof RDSActionEnum>;
  
  export const Route53ActionEnum = z.enum(['list_zones', 'list_records', 'create_zone', 'create_record', 'delete_record', 'delete_zone']);
  export type Route53Action = z.infer<typeof Route53ActionEnum>;
  
  export const ELBActionEnum = z.enum(['list', 'create', 'delete']);
  export type ELBAction = z.infer<typeof ELBActionEnum>;
  
  export const LambdaActionEnum = z.enum(['list', 'create', 'update', 'delete', 'invoke']);
  export type LambdaAction = z.infer<typeof LambdaActionEnum>;
  
  // AWS EC2 Schema
  export const EC2InstanceSchema = z.object({
    action: EC2InstanceActionEnum,
    region: z.string().min(1, 'AWS region is required'),
    instanceIds: z.array(z.string()).optional(),
    filters: z.record(z.any()).optional(),
    instanceType: z.string().optional(),
    imageId: z.string().optional(),
    keyName: z.string().optional(),
    securityGroups: z.array(z.string()).optional(),
    userData: z.string().optional(),
    count: z.number().optional(),
    tags: z.record(z.string()).optional(),
    waitForCompletion: z.boolean().optional().default(true),
    terminationProtection: z.boolean().optional()
  });
  
  export type EC2InstanceOptions = z.infer<typeof EC2InstanceSchema>;
  
  // AWS S3 Schema
  export const S3Schema = z.object({
    action: S3ActionEnum,
    region: z.string().min(1, 'AWS region is required'),
    bucket: z.string().optional(),
    objectKey: z.string().optional(),
    localPath: z.string().optional(),
    acl: z.string().optional(),
    tags: z.record(z.string()).optional(),
    metadata: z.record(z.string()).optional(),
    contentType: z.string().optional()
  });
  
  export type S3Options = z.infer<typeof S3Schema>;
  
  // AWS VPC Schema
  export const VPCSchema = z.object({
    action: VPCActionEnum,
    region: z.string().min(1, 'AWS region is required'),
    vpcId: z.string().optional(),
    cidrBlock: z.string().optional(),
    name: z.string().optional(),
    dnsSupport: z.boolean().optional(),
    dnsHostnames: z.boolean().optional(),
    tags: z.record(z.string()).optional(),
    subnets: z.array(z.object({
      cidr: z.string(),
      az: z.string().optional(),
      tags: z.record(z.string()).optional()
    })).optional()
  });
  
  export type VPCOptions = z.infer<typeof VPCSchema>;
  
  // AWS CloudFormation Schema
  export const CloudFormationSchema = z.object({
    action: CloudFormationActionEnum,
    region: z.string().min(1, 'AWS region is required'),
    stackName: z.string().optional(),
    templateBody: z.string().optional(),
    templateUrl: z.string().optional(),
    parameters: z.record(z.any()).optional(),
    capabilities: z.array(z.string()).optional(),
    tags: z.record(z.string()).optional()
  });
  
  export type CloudFormationOptions = z.infer<typeof CloudFormationSchema>;

• src/sysoperator/operations/aws.ts:77-116 (helper)

  Helper function used by AWS tool handlers (including CloudFormation) to create temp directories, write playbooks/templates, execute ansible-playbook, and clean up.

  async function executeAwsPlaybook(
    operationName: string, 
    playbookContent: string, 
    extraParams: string = '',
    tempFiles: { filename: string, content: string }[] = [] // For additional files like templates, policies
  ): Promise<string> {
    let tempDir: string | undefined;
    try {
      // Create a unique temporary directory
      tempDir = await createTempDirectory(`ansible-aws-${operationName}`);
      
      // Write the main playbook file
      const playbookPath = await writeTempFile(tempDir, 'playbook.yml', playbookContent);
      
      // Write any additional temporary files
      for (const file of tempFiles) {
        await writeTempFile(tempDir, file.filename, file.content);
      }
  
      // Build the command
      const command = `ansible-playbook ${playbookPath} ${extraParams}`;
      console.error(`Executing: ${command}`);
  
      // Execute the playbook asynchronously
      const { stdout, stderr } = await execAsync(command);
      
      // Return stdout, or a success message if stdout is empty
      return stdout || `${operationName} completed successfully (no output).`;
  
    } catch (error: any) {
      // Handle execution errors
      const errorMessage = error.stderr || error.message || 'Unknown error';
      throw new AnsibleExecutionError(`Ansible execution failed for ${operationName}: ${errorMessage}`, error.stderr);
    } finally {
      // Ensure cleanup happens even if errors occur
      if (tempDir) {
        await cleanupTempDirectory(tempDir);
      }
    }
  }