Merge pull request #11261 from schrodervictor/adds-elasticache-to-ec2-dynamic-inventory
Adds ElastiCache to ec2 dynamic inventory plugin
This commit is contained in:
Brian Coca
commit
468770c894
2 changed files with 450 additions and 5 deletions
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@ -47,6 +47,9 @@ route53 = False
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# To exclude RDS instances from the inventory, uncomment and set to False.
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#rds = False
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# To exclude ElastiCache instances from the inventory, uncomment and set to False.
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#elasticache = False
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# Additionally, you can specify the list of zones to exclude looking up in
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# 'route53_excluded_zones' as a comma-separated list.
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# route53_excluded_zones = samplezone1.com, samplezone2.com
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@ -59,6 +62,18 @@ all_instances = False
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# 'all_rds_instances' to True return all RDS instances regardless of state.
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all_rds_instances = False
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# By default, only ElastiCache clusters and nodes in the 'available' state
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# are returned. Set 'all_elasticache_clusters' and/or 'all_elastic_nodes'
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# to True return all ElastiCache clusters and nodes, regardless of state.
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#
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# Note that all_elasticache_nodes only applies to listed clusters. That means
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# if you set all_elastic_clusters to false, no node will be return from
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# unavailable clusters, regardless of the state and to what you set for
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# all_elasticache_nodes.
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all_elasticache_replication_groups = False
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all_elasticache_clusters = False
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all_elasticache_nodes = False
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# API calls to EC2 are slow. For this reason, we cache the results of an API
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# call. Set this to the path you want cache files to be written to. Two files
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# will be written to this directory:
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@ -89,6 +104,10 @@ group_by_tag_none = True
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group_by_route53_names = True
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group_by_rds_engine = True
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group_by_rds_parameter_group = True
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group_by_elasticache_engine = True
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group_by_elasticache_cluster = True
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group_by_elasticache_parameter_group = True
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group_by_elasticache_replication_group = True
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# If you only want to include hosts that match a certain regular expression
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# pattern_include = staging-*
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@ -121,6 +121,7 @@ from time import time
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import boto
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from boto import ec2
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from boto import rds
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from boto import elasticache
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from boto import route53
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import six
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@ -232,16 +233,41 @@ class Ec2Inventory(object):
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if config.has_option('ec2', 'rds'):
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self.rds_enabled = config.getboolean('ec2', 'rds')
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# Return all EC2 and RDS instances (if RDS is enabled)
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# Include ElastiCache instances?
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self.elasticache_enabled = True
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if config.has_option('ec2', 'elasticache'):
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self.elasticache_enabled = config.getboolean('ec2', 'elasticache')
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# Return all EC2 instances?
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if config.has_option('ec2', 'all_instances'):
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self.all_instances = config.getboolean('ec2', 'all_instances')
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else:
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self.all_instances = False
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# Return all RDS instances? (if RDS is enabled)
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if config.has_option('ec2', 'all_rds_instances') and self.rds_enabled:
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self.all_rds_instances = config.getboolean('ec2', 'all_rds_instances')
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else:
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self.all_rds_instances = False
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# Return all ElastiCache replication groups? (if ElastiCache is enabled)
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if config.has_option('ec2', 'all_elasticache_replication_groups') and self.elasticache_enabled:
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self.all_elasticache_replication_groups = config.getboolean('ec2', 'all_elasticache_replication_groups')
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else:
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self.all_elasticache_replication_groups = False
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# Return all ElastiCache clusters? (if ElastiCache is enabled)
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if config.has_option('ec2', 'all_elasticache_clusters') and self.elasticache_enabled:
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self.all_elasticache_clusters = config.getboolean('ec2', 'all_elasticache_clusters')
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else:
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self.all_elasticache_clusters = False
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# Return all ElastiCache nodes? (if ElastiCache is enabled)
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if config.has_option('ec2', 'all_elasticache_nodes') and self.elasticache_enabled:
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self.all_elasticache_nodes = config.getboolean('ec2', 'all_elasticache_nodes')
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else:
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self.all_elasticache_nodes = False
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# Cache related
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cache_dir = os.path.expanduser(config.get('ec2', 'cache_path'))
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if not os.path.exists(cache_dir):
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@ -272,6 +298,10 @@ class Ec2Inventory(object):
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'group_by_route53_names',
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'group_by_rds_engine',
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'group_by_rds_parameter_group',
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'group_by_elasticache_engine',
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'group_by_elasticache_cluster',
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'group_by_elasticache_parameter_group',
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'group_by_elasticache_replication_group',
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]
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for option in group_by_options:
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if config.has_option('ec2', option):
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@ -334,6 +364,9 @@ class Ec2Inventory(object):
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self.get_instances_by_region(region)
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if self.rds_enabled:
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self.get_rds_instances_by_region(region)
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if self.elasticache_enabled:
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self.get_elasticache_clusters_by_region(region)
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self.get_elasticache_replication_groups_by_region(region)
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self.write_to_cache(self.inventory, self.cache_path_cache)
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self.write_to_cache(self.index, self.cache_path_index)
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@ -387,13 +420,83 @@ class Ec2Inventory(object):
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self.add_rds_instance(instance, region)
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except boto.exception.BotoServerError as e:
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error = e.reason
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if e.error_code == 'AuthFailure':
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error = self.get_auth_error_message()
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if not e.reason == "Forbidden":
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error = "Looks like AWS RDS is down:\n%s" % e.message
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self.fail_with_error(error)
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def get_elasticache_clusters_by_region(self, region):
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''' Makes an AWS API call to the list of ElastiCache clusters (with
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nodes' info) in a particular region.'''
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# ElastiCache boto module doesn't provide a get_all_intances method,
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# that's why we need to call describe directly (it would be called by
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# the shorthand method anyway...)
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try:
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conn = elasticache.connect_to_region(region)
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if conn:
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# show_cache_node_info = True
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# because we also want nodes' information
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response = conn.describe_cache_clusters(None, None, None, True)
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except boto.exception.BotoServerError as e:
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error = e.reason
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if e.error_code == 'AuthFailure':
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error = self.get_auth_error_message()
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if not e.reason == "Forbidden":
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error = "Looks like AWS ElastiCache is down:\n%s" % e.message
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self.fail_with_error(error)
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try:
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# Boto also doesn't provide wrapper classes to CacheClusters or
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# CacheNodes. Because of that wo can't make use of the get_list
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# method in the AWSQueryConnection. Let's do the work manually
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clusters = response['DescribeCacheClustersResponse']['DescribeCacheClustersResult']['CacheClusters']
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except KeyError as e:
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error = "ElastiCache query to AWS failed (unexpected format)."
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self.fail_with_error(error)
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for cluster in clusters:
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self.add_elasticache_cluster(cluster, region)
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def get_elasticache_replication_groups_by_region(self, region):
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''' Makes an AWS API call to the list of ElastiCache replication groups
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in a particular region.'''
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# ElastiCache boto module doesn't provide a get_all_intances method,
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# that's why we need to call describe directly (it would be called by
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# the shorthand method anyway...)
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try:
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conn = elasticache.connect_to_region(region)
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if conn:
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response = conn.describe_replication_groups()
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except boto.exception.BotoServerError as e:
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error = e.reason
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if e.error_code == 'AuthFailure':
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error = self.get_auth_error_message()
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if not e.reason == "Forbidden":
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error = "Looks like AWS ElastiCache [Replication Groups] is down:\n%s" % e.message
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self.fail_with_error(error)
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try:
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# Boto also doesn't provide wrapper classes to ReplicationGroups
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# Because of that wo can't make use of the get_list method in the
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# AWSQueryConnection. Let's do the work manually
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replication_groups = response['DescribeReplicationGroupsResponse']['DescribeReplicationGroupsResult']['ReplicationGroups']
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except KeyError as e:
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error = "ElastiCache [Replication Groups] query to AWS failed (unexpected format)."
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self.fail_with_error(error)
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for replication_group in replication_groups:
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self.add_elasticache_replication_group(replication_group, region)
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def get_auth_error_message(self):
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''' create an informative error message if there is an issue authenticating'''
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errors = ["Authentication error retrieving ec2 inventory."]
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@ -410,7 +513,7 @@ class Ec2Inventory(object):
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errors.append(" - No Boto config found at any expected location '%s'" % ', '.join(boto_paths))
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return '\n'.join(errors)
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def fail_with_error(self, err_msg):
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'''log an error to std err for ansible-playbook to consume and exit'''
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sys.stderr.write(err_msg)
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@ -632,6 +735,243 @@ class Ec2Inventory(object):
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self.inventory["_meta"]["hostvars"][dest] = self.get_host_info_dict_from_instance(instance)
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def add_elasticache_cluster(self, cluster, region):
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''' Adds an ElastiCache cluster to the inventory and index, as long as
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it's nodes are addressable '''
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# Only want available clusters unless all_elasticache_clusters is True
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if not self.all_elasticache_clusters and cluster['CacheClusterStatus'] != 'available':
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return
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# Select the best destination address
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if 'ConfigurationEndpoint' in cluster and cluster['ConfigurationEndpoint']:
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# Memcached cluster
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dest = cluster['ConfigurationEndpoint']['Address']
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is_redis = False
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else:
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# Redis sigle node cluster
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# Because all Redis clusters are single nodes, we'll merge the
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# info from the cluster with info about the node
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dest = cluster['CacheNodes'][0]['Endpoint']['Address']
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is_redis = True
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if not dest:
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# Skip clusters we cannot address (e.g. private VPC subnet)
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return
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# Add to index
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self.index[dest] = [region, cluster['CacheClusterId']]
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# Inventory: Group by instance ID (always a group of 1)
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if self.group_by_instance_id:
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self.inventory[cluster['CacheClusterId']] = [dest]
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if self.nested_groups:
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self.push_group(self.inventory, 'instances', cluster['CacheClusterId'])
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# Inventory: Group by region
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if self.group_by_region and not is_redis:
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self.push(self.inventory, region, dest)
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if self.nested_groups:
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self.push_group(self.inventory, 'regions', region)
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# Inventory: Group by availability zone
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if self.group_by_availability_zone and not is_redis:
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self.push(self.inventory, cluster['PreferredAvailabilityZone'], dest)
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if self.nested_groups:
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if self.group_by_region:
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self.push_group(self.inventory, region, cluster['PreferredAvailabilityZone'])
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self.push_group(self.inventory, 'zones', cluster['PreferredAvailabilityZone'])
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# Inventory: Group by node type
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if self.group_by_instance_type and not is_redis:
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type_name = self.to_safe('type_' + cluster['CacheNodeType'])
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self.push(self.inventory, type_name, dest)
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if self.nested_groups:
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self.push_group(self.inventory, 'types', type_name)
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# Inventory: Group by VPC (information not available in the current
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# AWS API version for ElastiCache)
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# Inventory: Group by security group
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if self.group_by_security_group and not is_redis:
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# Check for the existance of the 'SecurityGroups' key and also if
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# this key has some value. When the cluster is not placed in a SG
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# the query can return None here and cause an error.
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if 'SecurityGroups' in cluster and cluster['SecurityGroups'] is not None:
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for security_group in cluster['SecurityGroups']:
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key = self.to_safe("security_group_" + security_group['SecurityGroupId'])
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self.push(self.inventory, key, dest)
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if self.nested_groups:
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self.push_group(self.inventory, 'security_groups', key)
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# Inventory: Group by engine
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if self.group_by_elasticache_engine and not is_redis:
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self.push(self.inventory, self.to_safe("elasticache_" + cluster['Engine']), dest)
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if self.nested_groups:
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self.push_group(self.inventory, 'elasticache_engines', self.to_safe(cluster['Engine']))
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# Inventory: Group by parameter group
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if self.group_by_elasticache_parameter_group:
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self.push(self.inventory, self.to_safe("elasticache_parameter_group_" + cluster['CacheParameterGroup']['CacheParameterGroupName']), dest)
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if self.nested_groups:
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self.push_group(self.inventory, 'elasticache_parameter_groups', self.to_safe(cluster['CacheParameterGroup']['CacheParameterGroupName']))
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# Inventory: Group by replication group
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if self.group_by_elasticache_replication_group and 'ReplicationGroupId' in cluster and cluster['ReplicationGroupId']:
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self.push(self.inventory, self.to_safe("elasticache_replication_group_" + cluster['ReplicationGroupId']), dest)
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if self.nested_groups:
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self.push_group(self.inventory, 'elasticache_replication_groups', self.to_safe(cluster['ReplicationGroupId']))
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# Global Tag: all ElastiCache clusters
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self.push(self.inventory, 'elasticache_clusters', cluster['CacheClusterId'])
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host_info = self.get_host_info_dict_from_describe_dict(cluster)
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self.inventory["_meta"]["hostvars"][dest] = host_info
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# Add the nodes
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for node in cluster['CacheNodes']:
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self.add_elasticache_node(node, cluster, region)
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def add_elasticache_node(self, node, cluster, region):
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''' Adds an ElastiCache node to the inventory and index, as long as
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it is addressable '''
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# Only want available nodes unless all_elasticache_nodes is True
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if not self.all_elasticache_nodes and node['CacheNodeStatus'] != 'available':
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return
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# Select the best destination address
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dest = node['Endpoint']['Address']
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if not dest:
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# Skip nodes we cannot address (e.g. private VPC subnet)
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return
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node_id = self.to_safe(cluster['CacheClusterId'] + '_' + node['CacheNodeId'])
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# Add to index
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self.index[dest] = [region, node_id]
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# Inventory: Group by node ID (always a group of 1)
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if self.group_by_instance_id:
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self.inventory[node_id] = [dest]
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if self.nested_groups:
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self.push_group(self.inventory, 'instances', node_id)
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# Inventory: Group by region
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if self.group_by_region:
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self.push(self.inventory, region, dest)
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if self.nested_groups:
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self.push_group(self.inventory, 'regions', region)
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# Inventory: Group by availability zone
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if self.group_by_availability_zone:
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self.push(self.inventory, cluster['PreferredAvailabilityZone'], dest)
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if self.nested_groups:
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if self.group_by_region:
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self.push_group(self.inventory, region, cluster['PreferredAvailabilityZone'])
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self.push_group(self.inventory, 'zones', cluster['PreferredAvailabilityZone'])
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# Inventory: Group by node type
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if self.group_by_instance_type:
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type_name = self.to_safe('type_' + cluster['CacheNodeType'])
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self.push(self.inventory, type_name, dest)
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if self.nested_groups:
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self.push_group(self.inventory, 'types', type_name)
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# Inventory: Group by VPC (information not available in the current
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# AWS API version for ElastiCache)
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# Inventory: Group by security group
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if self.group_by_security_group:
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# Check for the existance of the 'SecurityGroups' key and also if
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# this key has some value. When the cluster is not placed in a SG
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# the query can return None here and cause an error.
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if 'SecurityGroups' in cluster and cluster['SecurityGroups'] is not None:
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for security_group in cluster['SecurityGroups']:
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key = self.to_safe("security_group_" + security_group['SecurityGroupId'])
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self.push(self.inventory, key, dest)
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if self.nested_groups:
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self.push_group(self.inventory, 'security_groups', key)
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# Inventory: Group by engine
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if self.group_by_elasticache_engine:
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self.push(self.inventory, self.to_safe("elasticache_" + cluster['Engine']), dest)
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if self.nested_groups:
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self.push_group(self.inventory, 'elasticache_engines', self.to_safe("elasticache_" + cluster['Engine']))
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# Inventory: Group by parameter group (done at cluster level)
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# Inventory: Group by replication group (done at cluster level)
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# Inventory: Group by ElastiCache Cluster
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if self.group_by_elasticache_cluster:
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self.push(self.inventory, self.to_safe("elasticache_cluster_" + cluster['CacheClusterId']), dest)
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# Global Tag: all ElastiCache nodes
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self.push(self.inventory, 'elasticache_nodes', dest)
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host_info = self.get_host_info_dict_from_describe_dict(node)
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if dest in self.inventory["_meta"]["hostvars"]:
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self.inventory["_meta"]["hostvars"][dest].update(host_info)
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else:
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self.inventory["_meta"]["hostvars"][dest] = host_info
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def add_elasticache_replication_group(self, replication_group, region):
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''' Adds an ElastiCache replication group to the inventory and index '''
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# Only want available clusters unless all_elasticache_replication_groups is True
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if not self.all_elasticache_replication_groups and replication_group['Status'] != 'available':
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return
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# Select the best destination address (PrimaryEndpoint)
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dest = replication_group['NodeGroups'][0]['PrimaryEndpoint']['Address']
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if not dest:
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# Skip clusters we cannot address (e.g. private VPC subnet)
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return
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# Add to index
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self.index[dest] = [region, replication_group['ReplicationGroupId']]
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# Inventory: Group by ID (always a group of 1)
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if self.group_by_instance_id:
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self.inventory[replication_group['ReplicationGroupId']] = [dest]
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if self.nested_groups:
|
||||
self.push_group(self.inventory, 'instances', replication_group['ReplicationGroupId'])
|
||||
|
||||
# Inventory: Group by region
|
||||
if self.group_by_region:
|
||||
self.push(self.inventory, region, dest)
|
||||
if self.nested_groups:
|
||||
self.push_group(self.inventory, 'regions', region)
|
||||
|
||||
# Inventory: Group by availability zone (doesn't apply to replication groups)
|
||||
|
||||
# Inventory: Group by node type (doesn't apply to replication groups)
|
||||
|
||||
# Inventory: Group by VPC (information not available in the current
|
||||
# AWS API version for replication groups
|
||||
|
||||
# Inventory: Group by security group (doesn't apply to replication groups)
|
||||
# Check this value in cluster level
|
||||
|
||||
# Inventory: Group by engine (replication groups are always Redis)
|
||||
if self.group_by_elasticache_engine:
|
||||
self.push(self.inventory, 'elasticache_redis', dest)
|
||||
if self.nested_groups:
|
||||
self.push_group(self.inventory, 'elasticache_engines', 'redis')
|
||||
|
||||
# Global Tag: all ElastiCache clusters
|
||||
self.push(self.inventory, 'elasticache_replication_groups', replication_group['ReplicationGroupId'])
|
||||
|
||||
host_info = self.get_host_info_dict_from_describe_dict(replication_group)
|
||||
|
||||
self.inventory["_meta"]["hostvars"][dest] = host_info
|
||||
|
||||
def get_route53_records(self):
|
||||
''' Get and store the map of resource records to domain names that
|
||||
|
|
@ -680,7 +1020,6 @@ class Ec2Inventory(object):
|
|||
|
||||
return list(name_list)
|
||||
|
||||
|
||||
def get_host_info_dict_from_instance(self, instance):
|
||||
instance_vars = {}
|
||||
for key in vars(instance):
|
||||
|
|
@ -726,6 +1065,91 @@ class Ec2Inventory(object):
|
|||
|
||||
return instance_vars
|
||||
|
||||
def get_host_info_dict_from_describe_dict(self, describe_dict):
|
||||
''' Parses the dictionary returned by the API call into a flat list
|
||||
of parameters. This method should be used only when 'describe' is
|
||||
used directly because Boto doesn't provide specific classes. '''
|
||||
|
||||
# I really don't agree with prefixing everything with 'ec2'
|
||||
# because EC2, RDS and ElastiCache are different services.
|
||||
# I'm just following the pattern used until now to not break any
|
||||
# compatibility.
|
||||
|
||||
host_info = {}
|
||||
for key in describe_dict:
|
||||
value = describe_dict[key]
|
||||
key = self.to_safe('ec2_' + self.uncammelize(key))
|
||||
|
||||
# Handle complex types
|
||||
|
||||
# Target: Memcached Cache Clusters
|
||||
if key == 'ec2_configuration_endpoint' and value:
|
||||
host_info['ec2_configuration_endpoint_address'] = value['Address']
|
||||
host_info['ec2_configuration_endpoint_port'] = value['Port']
|
||||
|
||||
# Target: Cache Nodes and Redis Cache Clusters (single node)
|
||||
if key == 'ec2_endpoint' and value:
|
||||
host_info['ec2_endpoint_address'] = value['Address']
|
||||
host_info['ec2_endpoint_port'] = value['Port']
|
||||
|
||||
# Target: Redis Replication Groups
|
||||
if key == 'ec2_node_groups' and value:
|
||||
host_info['ec2_endpoint_address'] = value[0]['PrimaryEndpoint']['Address']
|
||||
host_info['ec2_endpoint_port'] = value[0]['PrimaryEndpoint']['Port']
|
||||
replica_count = 0
|
||||
for node in value[0]['NodeGroupMembers']:
|
||||
if node['CurrentRole'] == 'primary':
|
||||
host_info['ec2_primary_cluster_address'] = node['ReadEndpoint']['Address']
|
||||
host_info['ec2_primary_cluster_port'] = node['ReadEndpoint']['Port']
|
||||
host_info['ec2_primary_cluster_id'] = node['CacheClusterId']
|
||||
elif node['CurrentRole'] == 'replica':
|
||||
host_info['ec2_replica_cluster_address_'+ str(replica_count)] = node['ReadEndpoint']['Address']
|
||||
host_info['ec2_replica_cluster_port_'+ str(replica_count)] = node['ReadEndpoint']['Port']
|
||||
host_info['ec2_replica_cluster_id_'+ str(replica_count)] = node['CacheClusterId']
|
||||
replica_count += 1
|
||||
|
||||
# Target: Redis Replication Groups
|
||||
if key == 'ec2_member_clusters' and value:
|
||||
host_info['ec2_member_clusters'] = ','.join([str(i) for i in value])
|
||||
|
||||
# Target: All Cache Clusters
|
||||
elif key == 'ec2_cache_parameter_group':
|
||||
host_info["ec2_cache_node_ids_to_reboot"] = ','.join([str(i) for i in value['CacheNodeIdsToReboot']])
|
||||
host_info['ec2_cache_parameter_group_name'] = value['CacheParameterGroupName']
|
||||
host_info['ec2_cache_parameter_apply_status'] = value['ParameterApplyStatus']
|
||||
|
||||
# Target: Almost everything
|
||||
elif key == 'ec2_security_groups':
|
||||
|
||||
# Skip if SecurityGroups is None
|
||||
# (it is possible to have the key defined but no value in it).
|
||||
if value is not None:
|
||||
sg_ids = []
|
||||
for sg in value:
|
||||
sg_ids.append(sg['SecurityGroupId'])
|
||||
host_info["ec2_security_group_ids"] = ','.join([str(i) for i in sg_ids])
|
||||
|
||||
# Target: Everything
|
||||
# Preserve booleans and integers
|
||||
elif type(value) in [int, bool]:
|
||||
host_info[key] = value
|
||||
|
||||
# Target: Everything
|
||||
# Sanitize string values
|
||||
elif isinstance(value, six.string_types):
|
||||
host_info[key] = value.strip()
|
||||
|
||||
# Target: Everything
|
||||
# Replace None by an empty string
|
||||
elif type(value) == type(None):
|
||||
host_info[key] = ''
|
||||
|
||||
else:
|
||||
# Remove non-processed complex types
|
||||
pass
|
||||
|
||||
return host_info
|
||||
|
||||
def get_host_info(self):
|
||||
''' Get variables about a specific host '''
|
||||
|
||||
|
|
@ -789,6 +1213,9 @@ class Ec2Inventory(object):
|
|||
cache.write(json_data)
|
||||
cache.close()
|
||||
|
||||
def uncammelize(self, key):
|
||||
temp = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', key)
|
||||
return re.sub('([a-z0-9])([A-Z])', r'\1_\2', temp).lower()
|
||||
|
||||
def to_safe(self, word):
|
||||
''' Converts 'bad' characters in a string to underscores so they can be
|
||||
|
|
@ -796,7 +1223,6 @@ class Ec2Inventory(object):
|
|||
|
||||
return re.sub("[^A-Za-z0-9\_]", "_", word)
|
||||
|
||||
|
||||
def json_format_dict(self, data, pretty=False):
|
||||
''' Converts a dict to a JSON object and dumps it as a formatted
|
||||
string '''
|
||||
|
|
|
|||
Loading…
Reference in a new issue