#!/usr/bin/python # -*- coding: utf-8 -*- # (c) 2017, Ryan Scott Brown # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt) from __future__ import absolute_import, division, print_function __metaclass__ = type DOCUMENTATION = ''' --- module: terraform short_description: Manages a Terraform deployment (and plans) description: - Provides support for deploying resources with Terraform and pulling resource information back into Ansible. options: state: choices: ['planned', 'present', 'absent'] description: - Goal state of given stage/project type: str default: present binary_path: description: - The path of a terraform binary to use, relative to the 'service_path' unless you supply an absolute path. type: path project_path: description: - The path to the root of the Terraform directory with the vars.tf/main.tf/etc to use. type: path required: true workspace: description: - The terraform workspace to work with. type: str default: default purge_workspace: description: - Only works with state = absent - If true, the workspace will be deleted after the "terraform destroy" action. - The 'default' workspace will not be deleted. default: false type: bool plan_file: description: - The path to an existing Terraform plan file to apply. If this is not specified, Ansible will build a new TF plan and execute it. Note that this option is required if 'state' has the 'planned' value. type: path state_file: description: - The path to an existing Terraform state file to use when building plan. If this is not specified, the default `terraform.tfstate` will be used. - This option is ignored when plan is specified. type: path variables_files: description: - The path to a variables file for Terraform to fill into the TF configurations. This can accept a list of paths to multiple variables files. - Up until Ansible 2.9, this option was usable as I(variables_file). type: list elements: path aliases: [ 'variables_file' ] variables: description: - A group of key-values to override template variables or those in variables files. type: dict targets: description: - A list of specific resources to target in this plan/application. The resources selected here will also auto-include any dependencies. type: list elements: str lock: description: - Enable statefile locking, if you use a service that accepts locks (such as S3+DynamoDB) to store your statefile. type: bool default: true lock_timeout: description: - How long to maintain the lock on the statefile, if you use a service that accepts locks (such as S3+DynamoDB). type: int force_init: description: - To avoid duplicating infra, if a state file can't be found this will force a `terraform init`. Generally, this should be turned off unless you intend to provision an entirely new Terraform deployment. default: false type: bool backend_config: description: - A group of key-values to provide at init stage to the -backend-config parameter. type: dict backend_config_files: description: - The path to a configuration file to provide at init state to the -backend-config parameter. This can accept a list of paths to multiple configuration files. type: list elements: path version_added: '0.2.0' init_reconfigure: description: - Forces backend reconfiguration during init. default: false type: bool version_added: '1.3.0' notes: - To just run a `terraform plan`, use check mode. requirements: [ "terraform" ] author: "Ryan Scott Brown (@ryansb)" ''' EXAMPLES = """ - name: Basic deploy of a service community.general.terraform: project_path: '{{ project_dir }}' state: present - name: Define the backend configuration at init community.general.terraform: project_path: 'project/' state: "{{ state }}" force_init: true backend_config: region: "eu-west-1" bucket: "some-bucket" key: "random.tfstate" - name: Define the backend configuration with one or more files at init community.general.terraform: project_path: 'project/' state: "{{ state }}" force_init: true backend_config_files: - /path/to/backend_config_file_1 - /path/to/backend_config_file_2 """ RETURN = """ outputs: type: complex description: A dictionary of all the TF outputs by their assigned name. Use `.outputs.MyOutputName.value` to access the value. returned: on success sample: '{"bukkit_arn": {"sensitive": false, "type": "string", "value": "arn:aws:s3:::tf-test-bukkit"}' contains: sensitive: type: bool returned: always description: Whether Terraform has marked this value as sensitive type: type: str returned: always description: The type of the value (string, int, etc) value: type: str returned: always description: The value of the output as interpolated by Terraform stdout: type: str description: Full `terraform` command stdout, in case you want to display it or examine the event log returned: always sample: '' command: type: str description: Full `terraform` command built by this module, in case you want to re-run the command outside the module or debug a problem. returned: always sample: terraform apply ... """ import os import json import tempfile from ansible.module_utils.six.moves import shlex_quote from ansible.module_utils.basic import AnsibleModule DESTROY_ARGS = ('destroy', '-no-color', '-force') APPLY_ARGS = ('apply', '-no-color', '-input=false', '-auto-approve=true') module = None def preflight_validation(bin_path, project_path, variables_args=None, plan_file=None): if project_path in [None, ''] or '/' not in project_path: module.fail_json(msg="Path for Terraform project can not be None or ''.") if not os.path.exists(bin_path): module.fail_json(msg="Path for Terraform binary '{0}' doesn't exist on this host - check the path and try again please.".format(bin_path)) if not os.path.isdir(project_path): module.fail_json(msg="Path for Terraform project '{0}' doesn't exist on this host - check the path and try again please.".format(project_path)) rc, out, err = module.run_command([bin_path, 'validate'] + variables_args, cwd=project_path, use_unsafe_shell=True) if rc != 0: module.fail_json(msg="Failed to validate Terraform configuration files:\r\n{0}".format(err)) def _state_args(state_file): if state_file and os.path.exists(state_file): return ['-state', state_file] if state_file and not os.path.exists(state_file): module.fail_json(msg='Could not find state_file "{0}", check the path and try again.'.format(state_file)) return [] def init_plugins(bin_path, project_path, backend_config, backend_config_files, init_reconfigure): command = [bin_path, 'init', '-input=false'] if backend_config: for key, val in backend_config.items(): command.extend([ '-backend-config', shlex_quote('{0}={1}'.format(key, val)) ]) if backend_config_files: for f in backend_config_files: command.extend(['-backend-config', f]) if init_reconfigure: command.extend(['-reconfigure']) rc, out, err = module.run_command(command, cwd=project_path) if rc != 0: module.fail_json(msg="Failed to initialize Terraform modules:\r\n{0}".format(err)) def get_workspace_context(bin_path, project_path): workspace_ctx = {"current": "default", "all": []} command = [bin_path, 'workspace', 'list', '-no-color'] rc, out, err = module.run_command(command, cwd=project_path) if rc != 0: module.warn("Failed to list Terraform workspaces:\r\n{0}".format(err)) for item in out.split('\n'): stripped_item = item.strip() if not stripped_item: continue elif stripped_item.startswith('* '): workspace_ctx["current"] = stripped_item.replace('* ', '') else: workspace_ctx["all"].append(stripped_item) return workspace_ctx def _workspace_cmd(bin_path, project_path, action, workspace): command = [bin_path, 'workspace', action, workspace, '-no-color'] rc, out, err = module.run_command(command, cwd=project_path) if rc != 0: module.fail_json(msg="Failed to {0} workspace:\r\n{1}".format(action, err)) return rc, out, err def create_workspace(bin_path, project_path, workspace): _workspace_cmd(bin_path, project_path, 'new', workspace) def select_workspace(bin_path, project_path, workspace): _workspace_cmd(bin_path, project_path, 'select', workspace) def remove_workspace(bin_path, project_path, workspace): _workspace_cmd(bin_path, project_path, 'delete', workspace) def build_plan(command, project_path, variables_args, state_file, targets, state, plan_path=None): if plan_path is None: f, plan_path = tempfile.mkstemp(suffix='.tfplan') plan_command = [command[0], 'plan', '-input=false', '-no-color', '-detailed-exitcode', '-out', plan_path] for t in (module.params.get('targets') or []): plan_command.extend(['-target', t]) plan_command.extend(_state_args(state_file)) rc, out, err = module.run_command(plan_command + variables_args, cwd=project_path, use_unsafe_shell=True) if rc == 0: # no changes return plan_path, False, out, err, plan_command if state == 'planned' else command elif rc == 1: # failure to plan module.fail_json(msg='Terraform plan could not be created\r\nSTDOUT: {0}\r\n\r\nSTDERR: {1}'.format(out, err)) elif rc == 2: # changes, but successful return plan_path, True, out, err, plan_command if state == 'planned' else command module.fail_json(msg='Terraform plan failed with unexpected exit code {0}. \r\nSTDOUT: {1}\r\n\r\nSTDERR: {2}'.format(rc, out, err)) def main(): global module module = AnsibleModule( argument_spec=dict( project_path=dict(required=True, type='path'), binary_path=dict(type='path'), workspace=dict(required=False, type='str', default='default'), purge_workspace=dict(type='bool', default=False), state=dict(default='present', choices=['present', 'absent', 'planned']), variables=dict(type='dict'), variables_files=dict(aliases=['variables_file'], type='list', elements='path', default=None), plan_file=dict(type='path'), state_file=dict(type='path'), targets=dict(type='list', elements='str', default=[]), lock=dict(type='bool', default=True), lock_timeout=dict(type='int',), force_init=dict(type='bool', default=False), backend_config=dict(type='dict', default=None), backend_config_files=dict(type='list', elements='path', default=None), init_reconfigure=dict(required=False, type='bool', default=False), ), required_if=[('state', 'planned', ['plan_file'])], supports_check_mode=True, ) project_path = module.params.get('project_path') bin_path = module.params.get('binary_path') workspace = module.params.get('workspace') purge_workspace = module.params.get('purge_workspace') state = module.params.get('state') variables = module.params.get('variables') or {} variables_files = module.params.get('variables_files') plan_file = module.params.get('plan_file') state_file = module.params.get('state_file') force_init = module.params.get('force_init') backend_config = module.params.get('backend_config') backend_config_files = module.params.get('backend_config_files') init_reconfigure = module.params.get('init_reconfigure') if bin_path is not None: command = [bin_path] else: command = [module.get_bin_path('terraform', required=True)] if force_init: init_plugins(command[0], project_path, backend_config, backend_config_files, init_reconfigure) workspace_ctx = get_workspace_context(command[0], project_path) if workspace_ctx["current"] != workspace: if workspace not in workspace_ctx["all"]: create_workspace(command[0], project_path, workspace) else: select_workspace(command[0], project_path, workspace) if state == 'present': command.extend(APPLY_ARGS) elif state == 'absent': command.extend(DESTROY_ARGS) variables_args = [] for k, v in variables.items(): variables_args.extend([ '-var', '{0}={1}'.format(k, v) ]) if variables_files: for f in variables_files: variables_args.extend(['-var-file', f]) preflight_validation(command[0], project_path, variables_args) if module.params.get('lock') is not None: if module.params.get('lock'): command.append('-lock=true') else: command.append('-lock=false') if module.params.get('lock_timeout') is not None: command.append('-lock-timeout=%ds' % module.params.get('lock_timeout')) for t in (module.params.get('targets') or []): command.extend(['-target', t]) # we aren't sure if this plan will result in changes, so assume yes needs_application, changed = True, False out, err = '', '' if state == 'absent': command.extend(variables_args) elif state == 'present' and plan_file: if any([os.path.isfile(project_path + "/" + plan_file), os.path.isfile(plan_file)]): command.append(plan_file) else: module.fail_json(msg='Could not find plan_file "{0}", check the path and try again.'.format(plan_file)) else: plan_file, needs_application, out, err, command = build_plan(command, project_path, variables_args, state_file, module.params.get('targets'), state, plan_file) command.append(plan_file) if needs_application and not module.check_mode and not state == 'planned': rc, out, err = module.run_command(command, cwd=project_path) # checks out to decide if changes were made during execution if ' 0 added, 0 changed' not in out and not state == "absent" or ' 0 destroyed' not in out: changed = True if rc != 0: module.fail_json( msg="Failure when executing Terraform command. Exited {0}.\nstdout: {1}\nstderr: {2}".format(rc, out, err), command=' '.join(command) ) outputs_command = [command[0], 'output', '-no-color', '-json'] + _state_args(state_file) rc, outputs_text, outputs_err = module.run_command(outputs_command, cwd=project_path) if rc == 1: module.warn("Could not get Terraform outputs. This usually means none have been defined.\nstdout: {0}\nstderr: {1}".format(outputs_text, outputs_err)) outputs = {} elif rc != 0: module.fail_json( msg="Failure when getting Terraform outputs. " "Exited {0}.\nstdout: {1}\nstderr: {2}".format(rc, outputs_text, outputs_err), command=' '.join(outputs_command)) else: outputs = json.loads(outputs_text) # Restore the Terraform workspace found when running the module if workspace_ctx["current"] != workspace: select_workspace(command[0], project_path, workspace_ctx["current"]) if state == 'absent' and workspace != 'default' and purge_workspace is True: remove_workspace(command[0], project_path, workspace) module.exit_json(changed=changed, state=state, workspace=workspace, outputs=outputs, stdout=out, stderr=err, command=' '.join(command)) if __name__ == '__main__': main()