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Merge pull request #7395 from hkariti/ec2_hostname_variable

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Add hostname_variable to ec2 inventory script
This commit is contained in:
Abhijit Menon-Sen 2016-03-18 15:37:00 +05:30
commit ad0e707f97
2 changed files with 66 additions and 27 deletions
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5
contrib/inventory/ec2.ini
View file

@ -29,6 +29,11 @@ regions_exclude = us-gov-west-1,cn-north-1
# in the event of a collision. # in the event of a collision.
destination_variable = public_dns_name destination_variable = public_dns_name
# This allows you to override the inventory_name with an ec2 variable, instead
# of using the destination_variable above. Addressing (aka ansible_ssh_host)
# will still use destination_variable. Tags should be written as 'tag_TAGNAME'.
#hostname_variable = tag_Name
# For server inside a VPC, using DNS names may not make sense. When an instance # For server inside a VPC, using DNS names may not make sense. When an instance
# has 'subnet_id' set, this variable is used. If the subnet is public, setting # has 'subnet_id' set, this variable is used. If the subnet is public, setting
# this to 'ip_address' will return the public IP address. For instances in a # this to 'ip_address' will return the public IP address. For instances in a

88
contrib/inventory/ec2.py
View file

@ -236,6 +236,10 @@ class Ec2Inventory(object):
# Destination addresses # Destination addresses
self.destination_variable = config.get('ec2', 'destination_variable') self.destination_variable = config.get('ec2', 'destination_variable')
self.vpc_destination_variable = config.get('ec2', 'vpc_destination_variable') self.vpc_destination_variable = config.get('ec2', 'vpc_destination_variable')
if config.has_option('ec2', 'hostname_variable'):
self.hostname_variable = config.get('ec2', 'hostname_variable')
else:
self.hostname_variable = None
# Route53 # Route53
self.route53_enabled = config.getboolean('ec2', 'route53') self.route53_enabled = config.getboolean('ec2', 'route53')
@ -631,32 +635,46 @@ class Ec2Inventory(object):
# Skip instances we cannot address (e.g. private VPC subnet) # Skip instances we cannot address (e.g. private VPC subnet)
return return
# Set the inventory name
hostname = None
if self.hostname_variable:
if self.hostname_variable.startswith('tag_'):
hostname = instance.tags.get(self.hostname_variable[4:], None)
else:
hostname = getattr(instance, self.hostname_variable)
# If we can't get a nice hostname, use the destination address
if not hostname:
hostname = dest
hostname = self.to_safe(hostname).lower()
# if we only want to include hosts that match a pattern, skip those that don't # if we only want to include hosts that match a pattern, skip those that don't
if self.pattern_include and not self.pattern_include.match(dest): if self.pattern_include and not self.pattern_include.match(hostname):
return return
# if we need to exclude hosts that match a pattern, skip those # if we need to exclude hosts that match a pattern, skip those
if self.pattern_exclude and self.pattern_exclude.match(dest): if self.pattern_exclude and self.pattern_exclude.match(hostname):
return return
# Add to index # Add to index
self.index[dest] = [region, instance.id] self.index[hostname] = [region, instance.id]
# Inventory: Group by instance ID (always a group of 1) # Inventory: Group by instance ID (always a group of 1)
if self.group_by_instance_id: if self.group_by_instance_id:
self.inventory[instance.id] = [dest] self.inventory[instance.id] = [hostname]
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'instances', instance.id) self.push_group(self.inventory, 'instances', instance.id)
# Inventory: Group by region # Inventory: Group by region
if self.group_by_region: if self.group_by_region:
self.push(self.inventory, region, dest) self.push(self.inventory, region, hostname)
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'regions', region) self.push_group(self.inventory, 'regions', region)
# Inventory: Group by availability zone # Inventory: Group by availability zone
if self.group_by_availability_zone: if self.group_by_availability_zone:
self.push(self.inventory, instance.placement, dest) self.push(self.inventory, instance.placement, hostname)
if self.nested_groups: if self.nested_groups:
if self.group_by_region: if self.group_by_region:
self.push_group(self.inventory, region, instance.placement) self.push_group(self.inventory, region, instance.placement)
@ -665,28 +683,28 @@ class Ec2Inventory(object):
# Inventory: Group by Amazon Machine Image (AMI) ID # Inventory: Group by Amazon Machine Image (AMI) ID
if self.group_by_ami_id: if self.group_by_ami_id:
ami_id = self.to_safe(instance.image_id) ami_id = self.to_safe(instance.image_id)
self.push(self.inventory, ami_id, dest) self.push(self.inventory, ami_id, hostname)
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'images', ami_id) self.push_group(self.inventory, 'images', ami_id)
# Inventory: Group by instance type # Inventory: Group by instance type
if self.group_by_instance_type: if self.group_by_instance_type:
type_name = self.to_safe('type_' + instance.instance_type) type_name = self.to_safe('type_' + instance.instance_type)
self.push(self.inventory, type_name, dest) self.push(self.inventory, type_name, hostname)
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'types', type_name) self.push_group(self.inventory, 'types', type_name)
# Inventory: Group by key pair # Inventory: Group by key pair
if self.group_by_key_pair and instance.key_name: if self.group_by_key_pair and instance.key_name:
key_name = self.to_safe('key_' + instance.key_name) key_name = self.to_safe('key_' + instance.key_name)
self.push(self.inventory, key_name, dest) self.push(self.inventory, key_name, hostname)
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'keys', key_name) self.push_group(self.inventory, 'keys', key_name)
# Inventory: Group by VPC # Inventory: Group by VPC
if self.group_by_vpc_id and instance.vpc_id: if self.group_by_vpc_id and instance.vpc_id:
vpc_id_name = self.to_safe('vpc_id_' + instance.vpc_id) vpc_id_name = self.to_safe('vpc_id_' + instance.vpc_id)
self.push(self.inventory, vpc_id_name, dest) self.push(self.inventory, vpc_id_name, hostname)
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'vpcs', vpc_id_name) self.push_group(self.inventory, 'vpcs', vpc_id_name)
@ -695,7 +713,7 @@ class Ec2Inventory(object):
try: try:
for group in instance.groups: for group in instance.groups:
key = self.to_safe("security_group_" + group.name) key = self.to_safe("security_group_" + group.name)
self.push(self.inventory, key, dest) self.push(self.inventory, key, hostname)
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'security_groups', key) self.push_group(self.inventory, 'security_groups', key)
except AttributeError: except AttributeError:
@ -715,7 +733,7 @@ class Ec2Inventory(object):
key = self.to_safe("tag_" + k + "=" + v) key = self.to_safe("tag_" + k + "=" + v)
else: else:
key = self.to_safe("tag_" + k) key = self.to_safe("tag_" + k)
self.push(self.inventory, key, dest) self.push(self.inventory, key, hostname)
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'tags', self.to_safe("tag_" + k)) self.push_group(self.inventory, 'tags', self.to_safe("tag_" + k))
if v: if v:
@ -725,20 +743,21 @@ class Ec2Inventory(object):
if self.route53_enabled and self.group_by_route53_names: if self.route53_enabled and self.group_by_route53_names:
route53_names = self.get_instance_route53_names(instance) route53_names = self.get_instance_route53_names(instance)
for name in route53_names: for name in route53_names:
self.push(self.inventory, name, dest) self.push(self.inventory, name, hostname)
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'route53', name) self.push_group(self.inventory, 'route53', name)
# Global Tag: instances without tags # Global Tag: instances without tags
if self.group_by_tag_none and len(instance.tags) == 0: if self.group_by_tag_none and len(instance.tags) == 0:
self.push(self.inventory, 'tag_none', dest) self.push(self.inventory, 'tag_none', hostname)
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'tags', 'tag_none') self.push_group(self.inventory, 'tags', 'tag_none')
# Global Tag: tag all EC2 instances # Global Tag: tag all EC2 instances
self.push(self.inventory, 'ec2', dest) self.push(self.inventory, 'ec2', hostname)
self.inventory["_meta"]["hostvars"][dest] = self.get_host_info_dict_from_instance(instance) self.inventory["_meta"]["hostvars"][hostname] = self.get_host_info_dict_from_instance(instance)
self.inventory["_meta"]["hostvars"][hostname]['ansible_ssh_host'] = dest
def add_rds_instance(self, instance, region): def add_rds_instance(self, instance, region):
@ -756,24 +775,38 @@ class Ec2Inventory(object):
# Skip instances we cannot address (e.g. private VPC subnet) # Skip instances we cannot address (e.g. private VPC subnet)
return return
# Set the inventory name
hostname = None
if self.hostname_variable:
if self.hostname_variable.startswith('tag_'):
hostname = instance.tags.get(self.hostname_variable[4:], None)
else:
hostname = getattr(instance, self.hostname_variable)
# If we can't get a nice hostname, use the destination address
if not hostname:
hostname = dest
hostname = self.to_safe(hostname).lower()
# Add to index # Add to index
self.index[dest] = [region, instance.id] self.index[hostname] = [region, instance.id]
# Inventory: Group by instance ID (always a group of 1) # Inventory: Group by instance ID (always a group of 1)
if self.group_by_instance_id: if self.group_by_instance_id:
self.inventory[instance.id] = [dest] self.inventory[instance.id] = [hostname]
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'instances', instance.id) self.push_group(self.inventory, 'instances', instance.id)
# Inventory: Group by region # Inventory: Group by region
if self.group_by_region: if self.group_by_region:
self.push(self.inventory, region, dest) self.push(self.inventory, region, hostname)
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'regions', region) self.push_group(self.inventory, 'regions', region)
# Inventory: Group by availability zone # Inventory: Group by availability zone
if self.group_by_availability_zone: if self.group_by_availability_zone:
self.push(self.inventory, instance.availability_zone, dest) self.push(self.inventory, instance.availability_zone, hostname)
if self.nested_groups: if self.nested_groups:
if self.group_by_region: if self.group_by_region:
self.push_group(self.inventory, region, instance.availability_zone) self.push_group(self.inventory, region, instance.availability_zone)
@ -782,14 +815,14 @@ class Ec2Inventory(object):
# Inventory: Group by instance type # Inventory: Group by instance type
if self.group_by_instance_type: if self.group_by_instance_type:
type_name = self.to_safe('type_' + instance.instance_class) type_name = self.to_safe('type_' + instance.instance_class)
self.push(self.inventory, type_name, dest) self.push(self.inventory, type_name, hostname)
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'types', type_name) self.push_group(self.inventory, 'types', type_name)
# Inventory: Group by VPC # Inventory: Group by VPC
if self.group_by_vpc_id and instance.subnet_group and instance.subnet_group.vpc_id: if self.group_by_vpc_id and instance.subnet_group and instance.subnet_group.vpc_id:
vpc_id_name = self.to_safe('vpc_id_' + instance.subnet_group.vpc_id) vpc_id_name = self.to_safe('vpc_id_' + instance.subnet_group.vpc_id)
self.push(self.inventory, vpc_id_name, dest) self.push(self.inventory, vpc_id_name, hostname)
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'vpcs', vpc_id_name) self.push_group(self.inventory, 'vpcs', vpc_id_name)
@ -798,7 +831,7 @@ class Ec2Inventory(object):
try: try:
if instance.security_group: if instance.security_group:
key = self.to_safe("security_group_" + instance.security_group.name) key = self.to_safe("security_group_" + instance.security_group.name)
self.push(self.inventory, key, dest) self.push(self.inventory, key, hostname)
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'security_groups', key) self.push_group(self.inventory, 'security_groups', key)
@ -809,20 +842,21 @@ class Ec2Inventory(object):
# Inventory: Group by engine # Inventory: Group by engine
if self.group_by_rds_engine: if self.group_by_rds_engine:
self.push(self.inventory, self.to_safe("rds_" + instance.engine), dest) self.push(self.inventory, self.to_safe("rds_" + instance.engine), hostname)
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'rds_engines', self.to_safe("rds_" + instance.engine)) self.push_group(self.inventory, 'rds_engines', self.to_safe("rds_" + instance.engine))
# Inventory: Group by parameter group # Inventory: Group by parameter group
if self.group_by_rds_parameter_group: if self.group_by_rds_parameter_group:
self.push(self.inventory, self.to_safe("rds_parameter_group_" + instance.parameter_group.name), dest) self.push(self.inventory, self.to_safe("rds_parameter_group_" + instance.parameter_group.name), hostname)
if self.nested_groups: if self.nested_groups:
self.push_group(self.inventory, 'rds_parameter_groups', self.to_safe("rds_parameter_group_" + instance.parameter_group.name)) self.push_group(self.inventory, 'rds_parameter_groups', self.to_safe("rds_parameter_group_" + instance.parameter_group.name))
# Global Tag: all RDS instances # Global Tag: all RDS instances
self.push(self.inventory, 'rds', dest) self.push(self.inventory, 'rds', hostname)
self.inventory["_meta"]["hostvars"][dest] = self.get_host_info_dict_from_instance(instance) self.inventory["_meta"]["hostvars"][hostname] = self.get_host_info_dict_from_instance(instance)
self.inventory["_meta"]["hostvars"][hostname]['ansible_ssh_host'] = dest
def add_elasticache_cluster(self, cluster, region): def add_elasticache_cluster(self, cluster, region):
''' Adds an ElastiCache cluster to the inventory and index, as long as ''' Adds an ElastiCache cluster to the inventory and index, as long as