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community.general/plugins/modules/terraform.py
2023-01-16 22:54:07 +01:00

652 lines
26 KiB
Python

#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright (c) 2017, Ryan Scott Brown <ryansb@redhat.com>
# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
# SPDX-License-Identifier: GPL-3.0-or-later
from __future__ import absolute_import, division, print_function
__metaclass__ = type
DOCUMENTATION = r'''
---
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
plugin_paths:
description:
- List of paths containing Terraform plugin executable files.
- Plugin executables can be downloaded from U(https://releases.hashicorp.com/).
- When set, the plugin discovery and auto-download behavior of Terraform is disabled.
- The directory structure in the plugin path can be tricky. The Terraform docs
U(https://learn.hashicorp.com/tutorials/terraform/automate-terraform#pre-installed-plugins)
show a simple directory of files, but actually, the directory structure
has to follow the same structure you would see if Terraform auto-downloaded the plugins.
See the examples below for a tree output of an example plugin directory.
type: list
elements: path
version_added: 3.0.0
workspace:
description:
- The terraform workspace to work with. This sets the C(TF_WORKSPACE) environmental variable
that is used to override workspace selection. For more information about workspaces
have a look at U(https://developer.hashicorp.com/terraform/language/state/workspaces).
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 C(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 pairs to override template variables or those in variables files.
By default, only string and number values are allowed, which are passed on unquoted.
- Support complex variable structures (lists, dictionaries, numbers, and booleans) to reflect terraform variable syntax when I(complex_vars=true).
- Ansible integers or floats are mapped to terraform numbers.
- Ansible strings are mapped to terraform strings.
- Ansible dictionaries are mapped to terraform objects.
- Ansible lists are mapped to terraform lists.
- Ansible booleans are mapped to terraform booleans.
- "B(Note) passwords passed as variables will be visible in the log output. Make sure to use I(no_log=true) in production!"
type: dict
complex_vars:
description:
- Enable/disable capability to handle complex variable structures for C(terraform).
- If C(true) the I(variables) also accepts dictionaries, lists, and booleans to be passed to C(terraform).
Strings that are passed are correctly quoted.
- When disabled, supports only simple variables (strings, integers, and floats), and passes them on unquoted.
type: bool
default: false
version_added: 5.7.0
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
default: []
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 C(terraform init). Generally, this should be turned off unless
you intend to provision an entirely new Terraform deployment.
default: false
type: bool
overwrite_init:
description:
- Run init even if C(.terraform/terraform.tfstate) already exists in I(project_path).
default: true
type: bool
version_added: '3.2.0'
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'
provider_upgrade:
description:
- Allows Terraform init to upgrade providers to versions specified in the project's version constraints.
default: false
type: bool
version_added: 4.8.0
init_reconfigure:
description:
- Forces backend reconfiguration during init.
default: false
type: bool
version_added: '1.3.0'
check_destroy:
description:
- Apply only when no resources are destroyed. Note that this only prevents "destroy" actions,
but not "destroy and re-create" actions. This option is ignored when I(state=absent).
type: bool
default: false
version_added: '3.3.0'
parallelism:
description:
- Restrict concurrent operations when Terraform applies the plan.
type: int
version_added: '3.8.0'
notes:
- To just run a C(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
- name: Disable plugin discovery and auto-download by setting plugin_paths
community.general.terraform:
project_path: 'project/'
state: "{{ state }}"
force_init: true
plugin_paths:
- /path/to/plugins_dir_1
- /path/to/plugins_dir_2
- name: Complex variables example
community.general.terraform:
project_path: '{{ project_dir }}'
state: present
camplex_vars: true
variables:
vm_name: "{{ inventory_hostname }}"
vm_vcpus: 2
vm_mem: 2048
vm_additional_disks:
- label: "Third Disk"
size: 40
thin_provisioned: true
unit_number: 2
- label: "Fourth Disk"
size: 22
thin_provisioned: true
unit_number: 3
force_init: true
### Example directory structure for plugin_paths example
# $ tree /path/to/plugins_dir_1
# /path/to/plugins_dir_1/
# └── registry.terraform.io
# └── hashicorp
# └── vsphere
# ├── 1.24.0
# │ └── linux_amd64
# │ └── terraform-provider-vsphere_v1.24.0_x4
# └── 1.26.0
# └── linux_amd64
# └── terraform-provider-vsphere_v1.26.0_x4
"""
RETURN = """
outputs:
type: complex
description: A dictionary of all the TF outputs by their assigned name. Use C(.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 C(terraform) command stdout, in case you want to display it or examine the event log
returned: always
sample: ''
command:
type: str
description: Full C(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.six import integer_types
from ansible.module_utils.basic import AnsibleModule
from ansible_collections.community.general.plugins.module_utils.version import LooseVersion
module = None
def get_version(bin_path):
extract_version = module.run_command([bin_path, 'version', '-json'])
terraform_version = (json.loads(extract_version[1]))['terraform_version']
return terraform_version
def preflight_validation(bin_path, project_path, version, variables_args=None, plan_file=None):
if project_path is 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))
if LooseVersion(version) < LooseVersion('0.15.0'):
module.run_command([bin_path, 'validate', '-no-color'] + variables_args, check_rc=True, cwd=project_path)
else:
module.run_command([bin_path, 'validate', '-no-color'], check_rc=True, cwd=project_path)
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, provider_upgrade, plugin_paths, workspace):
command = [bin_path, 'init', '-input=false', '-no-color']
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'])
if provider_upgrade:
command.extend(['-upgrade'])
if plugin_paths:
for plugin_path in plugin_paths:
command.extend(['-plugin-dir', plugin_path])
rc, out, err = module.run_command(command, check_rc=True, cwd=project_path, environ_update={"TF_WORKSPACE": workspace})
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:\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('* ', '')
workspace_ctx["all"].append(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, check_rc=True, cwd=project_path)
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, apply_args, plan_path=None):
if plan_path is None:
f, plan_path = tempfile.mkstemp(suffix='.tfplan')
local_command = command[:]
plan_command = [command[0], 'plan']
if state == "planned":
for c in local_command[1:]:
plan_command.append(c)
if state == "present":
for a in apply_args:
local_command.remove(a)
for c in local_command[1:]:
plan_command.append(c)
plan_command.extend(['-input=false', '-no-color', '-detailed-exitcode', '-out', plan_path])
for t in targets:
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)
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\nSTDOUT: {out}\nSTDERR: {err}\nCOMMAND: {cmd} {args}'.format(
out=out,
err=err,
cmd=' '.join(plan_command),
args=' '.join([shlex_quote(arg) for arg in variables_args])
)
)
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 {rc}.\nSTDOUT: {out}\nSTDERR: {err}\nCOMMAND: {cmd} {args}'.format(
rc=rc,
out=out,
err=err,
cmd=' '.join(plan_command),
args=' '.join([shlex_quote(arg) for arg in variables_args])
))
def main():
global module
module = AnsibleModule(
argument_spec=dict(
project_path=dict(required=True, type='path'),
binary_path=dict(type='path'),
plugin_paths=dict(type='list', elements='path'),
workspace=dict(type='str', default='default'),
purge_workspace=dict(type='bool', default=False),
state=dict(default='present', choices=['present', 'absent', 'planned']),
variables=dict(type='dict'),
complex_vars=dict(type='bool', default=False),
variables_files=dict(aliases=['variables_file'], type='list', elements='path'),
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'),
backend_config_files=dict(type='list', elements='path'),
init_reconfigure=dict(type='bool', default=False),
overwrite_init=dict(type='bool', default=True),
check_destroy=dict(type='bool', default=False),
parallelism=dict(type='int'),
provider_upgrade=dict(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')
plugin_paths = module.params.get('plugin_paths')
workspace = module.params.get('workspace')
purge_workspace = module.params.get('purge_workspace')
state = module.params.get('state')
variables = module.params.get('variables') or {}
complex_vars = module.params.get('complex_vars')
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')
overwrite_init = module.params.get('overwrite_init')
check_destroy = module.params.get('check_destroy')
provider_upgrade = module.params.get('provider_upgrade')
if bin_path is not None:
command = [bin_path]
else:
command = [module.get_bin_path('terraform', required=True)]
checked_version = get_version(command[0])
if LooseVersion(checked_version) < LooseVersion('0.15.0'):
DESTROY_ARGS = ('destroy', '-no-color', '-force')
APPLY_ARGS = ('apply', '-no-color', '-input=false', '-auto-approve=true')
else:
DESTROY_ARGS = ('destroy', '-no-color', '-auto-approve')
APPLY_ARGS = ('apply', '-no-color', '-input=false', '-auto-approve')
if force_init:
if overwrite_init or not os.path.isfile(os.path.join(project_path, ".terraform", "terraform.tfstate")):
init_plugins(command[0], project_path, backend_config, backend_config_files, init_reconfigure, provider_upgrade, plugin_paths, workspace)
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)
if state == 'present' and module.params.get('parallelism') is not None:
command.append('-parallelism=%d' % module.params.get('parallelism'))
def format_args(vars):
if isinstance(vars, str):
return '"{string}"'.format(string=vars.replace('\\', '\\\\').replace('"', '\\"'))
elif isinstance(vars, bool):
if vars:
return 'true'
else:
return 'false'
return str(vars)
def process_complex_args(vars):
ret_out = []
if isinstance(vars, dict):
for k, v in vars.items():
if isinstance(v, dict):
ret_out.append('{0}={{{1}}}'.format(k, process_complex_args(v)))
elif isinstance(v, list):
ret_out.append("{0}={1}".format(k, process_complex_args(v)))
elif isinstance(v, (integer_types, float, str, bool)):
ret_out.append('{0}={1}'.format(k, format_args(v)))
else:
# only to handle anything unforeseen
module.fail_json(msg="Supported types are, dictionaries, lists, strings, integer_types, boolean and float.")
if isinstance(vars, list):
l_out = []
for item in vars:
if isinstance(item, dict):
l_out.append("{{{0}}}".format(process_complex_args(item)))
elif isinstance(item, list):
l_out.append("{0}".format(process_complex_args(item)))
elif isinstance(item, (str, integer_types, float, bool)):
l_out.append(format_args(item))
else:
# only to handle anything unforeseen
module.fail_json(msg="Supported types are, dictionaries, lists, strings, integer_types, boolean and float.")
ret_out.append("[{0}]".format(",".join(l_out)))
return ",".join(ret_out)
variables_args = []
if complex_vars:
for k, v in variables.items():
if isinstance(v, dict):
variables_args.extend([
'-var',
'{0}={{{1}}}'.format(k, process_complex_args(v))
])
elif isinstance(v, list):
variables_args.extend([
'-var',
'{0}={1}'.format(k, process_complex_args(v))
])
# on the top-level we need to pass just the python string with necessary
# terraform string escape sequences
elif isinstance(v, str):
variables_args.extend([
'-var',
"{0}={1}".format(k, v)
])
else:
variables_args.extend([
'-var',
'{0}={1}'.format(k, format_args(v))
])
else:
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, checked_version, 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, APPLY_ARGS, plan_file)
if state == 'present' and check_destroy and '- destroy' in out:
module.fail_json(msg="Aborting command because it would destroy some resources. "
"Consider switching the 'check_destroy' to false to suppress this error")
command.append(plan_file)
if needs_application and not module.check_mode and state != 'planned':
rc, out, err = module.run_command(command, check_rc=False, cwd=project_path)
if rc != 0:
if workspace_ctx["current"] != workspace:
select_workspace(command[0], project_path, workspace_ctx["current"])
module.fail_json(msg=err.rstrip(), rc=rc, stdout=out,
stdout_lines=out.splitlines(), stderr=err,
stderr_lines=err.splitlines(),
cmd=' '.join(command))
# 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
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()