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aws_ec2 Implement the missing 'region discovery' (#51333)
* aws_ec2 Implement the missing 'region discovery' fixes #45288 tries to use api as documented (which seems to fail in latest boto3 versions) and fallback to boto3 'hardcoded' list of regions * fixes and cleanup, add error for worst case scenario * fix tests, remove more unused code * add load_name * acually load the plugin * set plugin as required * reverted test changes, removed options tests * fixes as per feedback and cleanup
This commit is contained in:
Brian Coca
Sloane Hertel
parent
3ba3af5058
commit
50b40c47df
3 changed files with 39 additions and 82 deletions
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@ -48,18 +48,27 @@ DOCUMENTATION = '''
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- name: AWS_SESSION_TOKEN
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- name: EC2_SECURITY_TOKEN
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regions:
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description: A list of regions in which to describe EC2 instances. By default this is all regions except us-gov-west-1
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and cn-north-1.
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description:
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- A list of regions in which to describe EC2 instances.
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- If empty (the default) default this will include all regions, except possibly restricted ones like us-gov-west-1 and cn-north-1.
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type: list
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default: []
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hostnames:
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description: A list in order of precedence for hostname variables. You can use the options specified in
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U(http://docs.aws.amazon.com/cli/latest/reference/ec2/describe-instances.html#options). To use tags as hostnames
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use the syntax tag:Name=Value to use the hostname Name_Value, or tag:Name to use the value of the Name tag.
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type: list
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default: []
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filters:
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description: A dictionary of filter value pairs. Available filters are listed here
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U(http://docs.aws.amazon.com/cli/latest/reference/ec2/describe-instances.html#options)
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type: dict
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default: {}
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strict_permissions:
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description: By default if a 403 (Forbidden) is encountered this plugin will fail. You can set strict_permissions to
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False in the inventory config file which will allow 403 errors to be gracefully skipped.
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type: bool
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default: True
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'''
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EXAMPLES = '''
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@ -127,9 +136,8 @@ compose:
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ansible_host: private_ip_address
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'''
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from ansible.errors import AnsibleError, AnsibleParserError
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from ansible.errors import AnsibleError
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from ansible.module_utils._text import to_native, to_text
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from ansible.module_utils.six import string_types
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from ansible.module_utils.ec2 import ansible_dict_to_boto3_filter_list, boto3_tag_list_to_ansible_dict
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from ansible.module_utils.ec2 import camel_dict_to_snake_dict
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from ansible.plugins.inventory import BaseInventoryPlugin, Constructable, Cacheable, to_safe_group_name
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@ -315,6 +323,25 @@ class InventoryModule(BaseInventoryPlugin, Constructable, Cacheable):
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Generator that yields a boto3 client and the region
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'''
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if not regions:
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try:
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# as per https://boto3.amazonaws.com/v1/documentation/api/latest/guide/ec2-example-regions-avail-zones.html
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client = boto3.client('ec2')
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resp = client.describe_regions()
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regions = [x['RegionName'] for x in resp.get('Regions', [])]
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except botocore.exceptions.NoRegionError:
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# above seems to fail depending on boto3 version, ignore and lets try something else
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pass
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# fallback to local list hardcoded in boto3 if still no regions
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if not regions:
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session = boto3.Session()
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regions = session.get_available_regions('ec2')
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# I give up, now you MUST give me regions
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if not regions:
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raise AnsibleError('Unable to get regions list from available methods, you must specify the "regions" option to continue.')
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credentials = self._get_credentials()
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for region in regions:
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@ -486,49 +513,6 @@ class InventoryModule(BaseInventoryPlugin, Constructable, Cacheable):
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display.debug("aws_ec2 inventory filename must end with 'aws_ec2.yml' or 'aws_ec2.yaml'")
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return False
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def _get_query_options(self, config_data):
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'''
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:param config_data: contents of the inventory config file
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:return A list of regions to query,
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a list of boto3 filter dicts,
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a list of possible hostnames in order of preference
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a boolean to indicate whether to fail on permission errors
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'''
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options = {'regions': {'type_to_be': list, 'value': config_data.get('regions', [])},
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'filters': {'type_to_be': dict, 'value': config_data.get('filters', {})},
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'hostnames': {'type_to_be': list, 'value': config_data.get('hostnames', [])},
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'strict_permissions': {'type_to_be': bool, 'value': config_data.get('strict_permissions', True)}}
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# validate the options
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for name in options:
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options[name]['value'] = self._validate_option(name, options[name]['type_to_be'], options[name]['value'])
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regions = options['regions']['value']
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filters = ansible_dict_to_boto3_filter_list(options['filters']['value'])
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hostnames = options['hostnames']['value']
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strict_permissions = options['strict_permissions']['value']
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return regions, filters, hostnames, strict_permissions
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def _validate_option(self, name, desired_type, option_value):
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'''
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:param name: the option name
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:param desired_type: the class the option needs to be
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:param option: the value the user has provided
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:return The option of the correct class
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'''
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if isinstance(option_value, string_types) and desired_type == list:
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option_value = [option_value]
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if option_value is None:
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option_value = desired_type()
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if not isinstance(option_value, desired_type):
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raise AnsibleParserError("The option %s (%s) must be a %s" % (name, option_value, desired_type))
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return option_value
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def parse(self, inventory, loader, path, cache=True):
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super(InventoryModule, self).parse(inventory, loader, path)
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@ -536,7 +520,10 @@ class InventoryModule(BaseInventoryPlugin, Constructable, Cacheable):
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self._set_credentials()
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# get user specifications
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regions, filters, hostnames, strict_permissions = self._get_query_options(config_data)
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regions = self.get_option('regions')
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filters = ansible_dict_to_boto3_filter_list(self.get_option('filters'))
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hostnames = self.get_option('hostnames')
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strict_permissions = self.get_option('strict_permissions')
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cache_key = self.get_cache_key(path)
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# false when refresh_cache or --flush-cache is used
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