­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ # Licensed to the Apache Software Foundation (ASF) under one or more # contributor license agreements. See the NOTICE file distributed with # this work for additional information regarding copyright ownership. # The ASF licenses this file to You under the Apache License, Version 2.0 # (the "License"); you may not use this file except in compliance with # the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. __all__ = ["ApplicationLBDriver"] from libcloud.utils.xml import findall, findtext from libcloud.common.aws import AWSGenericResponse, SignedAWSConnection from libcloud.loadbalancer.base import Driver, Member, LoadBalancer from libcloud.loadbalancer.types import State VERSION = "2015-12-01" HOST = "elasticloadbalancing.%s.amazonaws.com" ROOT = "/%s/" % (VERSION) NS = "http://elasticloadbalancing.amazonaws.com/doc/{}/".format(VERSION) class ALBResponse(AWSGenericResponse): """ Amazon ALB response class. """ namespace = NS exceptions = {} xpath = "Error" class ALBConnection(SignedAWSConnection): version = VERSION host = HOST responseCls = ALBResponse service_name = "elasticloadbalancing" class ALBTargetGroup: """ AWS ALB target group class http://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-target-groups.html """ def __init__( self, target_group_id, name, protocol, port, vpc, driver, health_check_timeout=5, health_check_port="traffic-port", health_check_path="/", health_check_proto="HTTP", health_check_matcher="200", health_check_interval=30, healthy_threshold=5, unhealthy_threshold=2, balancers=[], members=[], ): self.id = target_group_id self.name = name self.protocol = protocol self.port = port self.vpc = vpc self.health_check_timeout = health_check_timeout self.health_check_port = health_check_port self.health_check_path = health_check_path self.health_check_proto = health_check_proto self.health_check_matcher = health_check_matcher self.health_check_interval = health_check_interval self.healthy_threshold = healthy_threshold self.unhealthy_threshold = unhealthy_threshold self._balancers = balancers self._balancers_arns = [lb.id for lb in balancers] if balancers else [] self._members = members self._members_ids = [mb.id for mb in members] if members else [] self._driver = driver @property def balancers(self): if not self._balancers and self._balancers_arns: self._balancers = [] for balancer_arn in self._balancers_arns: self._balancers.append(self._driver.get_balancer(balancer_arn)) return self._balancers @balancers.setter def balancers(self, val): self._balancers = val self._balancers_arns = [lb.id for lb in val] if val else [] @property def members(self): if not self._members: mbrs = self._driver._ex_get_target_group_members(self) self._members = mbrs self._members_ids = [mb.id for mb in mbrs] if mbrs else [] return self._members @members.setter def members(self, val): self._members = val self._members_ids = [mb.id for mb in val] if val else [] class ALBListener: """ AWS ALB listener class http://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-listeners.html """ def __init__( self, listener_id, protocol, port, balancer, driver, action="", ssl_policy="", ssl_certificate="", rules=[], ): self.id = listener_id self.protocol = protocol self.port = port self.action = action self.ssl_policy = ssl_policy self.ssl_certificate = ssl_certificate self._balancer = balancer self._balancer_arn = balancer.id if balancer else None self._rules = rules self._driver = driver @property def balancer(self): if not self._balancer and self._balancer_arn: self._balancer = self._driver.get_balancer(self._balancer_arn) return self._balancer @balancer.setter def balancer(self, val): self._balancer = val self._balancer_arn = val.id @property def rules(self): if not self._rules: self._rules = self._driver._ex_get_rules_for_listener(self) return self._rules @rules.setter def rules(self, val): self._rules = val class ALBRule: """ AWS ALB listener rule class http://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-listeners.html#listener-rules """ def __init__( self, rule_id, is_default, priority, target_group, driver, conditions={}, listener=None, ): self.id = rule_id self.is_default = is_default self.priority = priority self.conditions = conditions self._listener = listener self._listener_arn = listener.id if listener else None self._target_group = target_group self._target_group_arn = target_group.id if target_group else None self._driver = driver @property def target_group(self): if not self._target_group and self._target_group_arn: self._target_group = self._driver.ex_get_target_group(self._target_group_arn) return self._target_group @target_group.setter def target_group(self, val): self._target_group = val self._target_group_arn = val.id @property def listener(self): if not self._listener and self._listener_arn: self._listener = self.driver.ex_get_listener(self._listener_arn) return self._listener @listener.setter def listener(self, val): self._listener = val self._listener_arn = val.id class ApplicationLBDriver(Driver): name = "Amazon Application Load Balancing" website = "http://aws.amazon.com/elasticloadbalancing/" connectionCls = ALBConnection signature_version = "4" def __init__(self, access_id, secret, region, token=None): self.token = token self.region = region self.region_name = region super().__init__(access_id, secret, token=token, host=HOST % region, region=region) def list_protocols(self): """ Return list of protocols supported by driver :rtype: ``list`` of ``strings`` """ return ["http", "https"] def list_balancers(self): """ List all load balancers :rtype: ``list`` of :class:`LoadBalancer` """ params = {"Action": "DescribeLoadBalancers"} data = self.connection.request(ROOT, params=params).object return self._to_balancers(data) def get_balancer(self, balancer_id): """ Get a load balancer object by ARN :param balancer_id: ARN of load balancer you wish to fetch. :type balancer_id: ``str`` :rtype: :class:`LoadBalancer` """ params = { "Action": "DescribeLoadBalancers", "LoadBalancerArns.member.1": balancer_id, } data = self.connection.request(ROOT, params=params).object return self._to_balancers(data)[0] def create_balancer( self, name, port, protocol, algorithm, members, ex_scheme=None, ex_security_groups=None, ex_subnets=None, ex_tags=None, ex_ssl_cert_arn=None, ): """ Create a new load balancer instance. AWS ALB balancer creation consists of 5 steps: http://docs.aws.amazon.com/elasticloadbalancing/latest/APIReference/Welcome.html create_balancer() is a standard API method so, it's made as a wrapper here to preserve compatibility with other drivers where LB creation is one-step process. It calls respective ALB methods to assemble ready-to-use load balancer. :param name: Name of the new load balancer :type name: ``str`` :param port: Port number to setup load balancer listener :type port: ``int`` :param protocol: Load balancer protocol, should be 'HTTP' or 'HTTPS'. :type protocol: ``str`` :param algorithm: Load balancing algorithm. Ignored for AWS ALB. :type algorithm: :class:`Algorithm` or ``None`` :param members: List of Members to attach to the balancer. If 'port' attribute is set for the member - load balancer will send traffic there. Otherwise - load balancer port is used on the memeber's side. 'ip' attribute is ignored. :type members: ``list`` of :class:`Member` :param ex_scheme: Scheme of load balancer. Can be 'internet-facing' or 'internal'. :type ex_scheme: ``str`` :param ex_security_groups: List of load balancer security group ids. :type ex_security_groups: ``list`` of ``str`` :param ex_subnets: List of load balancer subnet ids. :type ex_subnets: ``list`` of ``str`` :param ex_tags: Tags to assign to the load balancer. :type ex_tags: ``dict`` :param ex_ssl_cert_arn: SSL certificate ARN to use when load balancer protocol is 'HTTPS'. :type ex_ssl_cert_arn: ``str`` :return: LoadBalancer object :rtype: :class:`LoadBalancer` """ ex_scheme = ex_scheme or "" ex_security_groups = ex_security_groups or [] ex_subnets = ex_subnets or [] ex_tags = ex_tags or {} ex_ssl_cert_arn = ex_ssl_cert_arn or "" balancer = self.ex_create_balancer( name, scheme=ex_scheme, security_groups=ex_security_groups, subnets=ex_subnets, tags=ex_tags, ) target_group = self.ex_create_target_group( name + "-tg", port, protocol, balancer.extra.get("vpc"), health_check_proto=protocol, ) self.ex_register_targets(target_group, members) listener = self.ex_create_listener( balancer, port, protocol, target_group, ssl_cert_arn=ex_ssl_cert_arn ) balancer.extra["listener"] = listener return balancer def ex_create_balancer( self, name, addr_type="ipv4", scheme="internet-facing", security_groups=None, subnets=None, tags=None, ): """ AWS-specific method to create a new load balancer. Since ALB is a composite object (load balancer, target group, listener etc) - extra methods must be called to assemble ready-to-use balancer. :param name: Name of the new load balancer :type name: ``str`` :param addr_type: Load balancer address type. Can be 'ipv4' or 'ipv6'. :type addr_type: ``str`` :param scheme: Scheme of load balancer. Can be 'internet-facing' or 'internal'. :type scheme: ``str`` :param security_groups: List of load balancer security group ids. :type security_groups: ``list`` of ``str`` :param subnets: List of load balancer subnet ids. :type subnets: ``list`` of ``str`` :param tags: Tags to assign to the load balancer. :type tags: ``dict`` :return: LoadBalancer object :rtype: :class:`LoadBalancer` """ security_groups = security_groups or [] subnets = subnets or [] tags = tags or {} # mandatory params params = {"Action": "CreateLoadBalancer", "Name": name} idx = 0 for subnet in subnets: idx += 1 params["Subnets.member." + str(idx)] = subnet # optional params params.update( { "IpAddressType": addr_type, # Valid Values: ipv4 | dualstack "Scheme": scheme, # Valid Values: internet-facing | internal } ) idx = 0 for sg in security_groups: idx += 1 params["SecurityGroups.member." + str(idx)] = sg idx = 0 for k, v in tags.items(): idx += 1 params["Tags.member." + str(idx) + ".Key"] = k params["Tags.member." + str(idx) + ".Value"] = v data = self.connection.request(ROOT, params=params).object xpath = "CreateLoadBalancerResult/LoadBalancers/member" for el in findall(element=data, xpath=xpath, namespace=NS): balancer = self._to_balancer(el) return balancer def ex_create_target_group( self, name, port, proto, vpc, health_check_interval=30, health_check_path="/", health_check_port="traffic-port", health_check_proto="HTTP", health_check_timeout=5, health_check_matcher="200", healthy_threshold=5, unhealthy_threshold=2, ): """ Create a target group for AWS ALB load balancer. :param name: Name of target group :type name: ``str`` :param port: The port on which the targets receive traffic. This port is used unless you specify a port override when registering the target. :type port: ``int`` :param proto: The protocol to use for routing traffic to the targets. Can be 'HTTP' or 'HTTPS'. :type proto: ``str`` :param vpc: The identifier of the virtual private cloud (VPC). :type vpc: ``str`` :param health_check_interval: The approximate amount of time, in seconds, between health checks of an individual target. The default is 30 seconds. :type health_check_interval: ``int`` :param health_check_path: The ping path that is the destination on the targets for health checks. The default is / :type health_check_path: ``str`` :param health_check_port: The port the load balancer uses when performing health checks on targets. The default is traffic-port, which indicates the port on which each target receives traffic from the load balancer. :type health_check_port: ``str`` :param health_check_proto: The protocol the load balancer uses when performing health checks on targets. Can be 'HTTP' (default) or 'HTTPS'. :type health_check_proto: ``str`` :param health_check_timeout: The amount of time, in seconds, during which no response from a target means a failed health check. The default is 5s. :type health_check_timeout: ``int`` :param health_check_matcher: The HTTP codes to use when checking for a successful response from a target. Valid values: "200", "200,202", "200-299". :type health_check_matcher: ``str`` :param healthy_threshold: The number of consecutive health checks successes required before considering an unhealthy target healthy. The default is 5 :type healthy_threshold: ``int`` :param unhealthy_threshold: The number of consecutive health check failures required before considering a target unhealthy. The default is 2. :type unhealthy_threshold: ``int`` :return: Target group object. :rtype: :class:`ALBTargetGroup` """ # mandatory params params = { "Action": "CreateTargetGroup", "Name": name, "Protocol": proto, "Port": port, "VpcId": vpc, } # optional params params.update( { # Valid Values: Min value of 5. Max value of 300. "HealthCheckIntervalSeconds": health_check_interval, "HealthCheckPath": health_check_path, "HealthCheckPort": health_check_port, # Valid Values: HTTP | HTTPS "HealthCheckProtocol": health_check_proto, # Valid Range: Min value of 2. Max value of 60. "HealthCheckTimeoutSeconds": health_check_timeout, # Valid Range: Minimum value of 2. Maximum value of 10. "HealthyThresholdCount": healthy_threshold, # Valid Range: Minimum value of 2. Maximum value of 10. "UnhealthyThresholdCount": unhealthy_threshold, # Valid values: "200", "200,202", "200-299" "Matcher.HttpCode": health_check_matcher, } ) data = self.connection.request(ROOT, params=params).object xpath = "CreateTargetGroupResult/TargetGroups/member" for el in findall(element=data, xpath=xpath, namespace=NS): target_group = self._to_target_group(el) return target_group def ex_register_targets(self, target_group, members=None): """ Register members as targets at target group :param target_group: Target group dict where register members. :type target_group: ``dict`` :param members: List of Members to attach to the balancer. If 'port' attribute is set for the member - load balancer will send traffic there. Otherwise - load balancer port is used on the memeber's side. 'ip' attribute is ignored. :type members: ``list`` of :class:`Member` :return: True on success, False if no members provided. :rtype: ``bool`` """ members = members or [] # mandatory params params = {"Action": "RegisterTargets", "TargetGroupArn": target_group.id} if not members: return False idx = 0 for member in members: idx += 1 params["Targets.member." + str(idx) + ".Id"] = member.id if member.port: params["Targets.member." + str(idx) + ".Port"] = member.port # RegisterTargets doesn't return any useful data self.connection.request(ROOT, params=params) target_group.members = members return True def ex_create_listener( self, balancer, port, proto, target_group, action="forward", ssl_cert_arn=None, ssl_policy=None, ): """ Create a listener for application load balancer :param balancer: LoadBalancer to create listener for :type balancer: :class:`LoadBalancer` :param port: Port number to setup load balancer listener :type port: ``int`` :param proto: Load balancer protocol, should be 'HTTP' or 'HTTPS'. :type proto: ``str`` :param target_group: Target group associated with the listener. :type target_group: :class:`ALBTargetGroup` :param action: Default action for the listener, valid value is 'forward' :type action: ``str`` :param ssl_cert_arn: SSL certificate ARN to use when listener protocol is 'HTTPS'. :type ssl_cert_arn: ``str`` :param ssl_policy: The security policy that defines which ciphers and protocols are supported. The default is the current predefined security policy. Example: 'ELBSecurityPolicy-2016-08' :type ssl_policy: ``str`` :return: Listener object :rtype: :class:`ALBListener` """ ssl_cert_arn = ssl_cert_arn or "" ssl_policy = ssl_policy or "" # mandatory params params = { "Action": "CreateListener", "LoadBalancerArn": balancer.id, "Protocol": proto, # Valid Values: HTTP | HTTPS "Port": port, # Valid Range: Min value of 1. Max value of 65535. "DefaultActions.member.1.Type": action, "DefaultActions.member.1.TargetGroupArn": target_group.id, } # optional params if proto == "HTTPS": params["Certificates.member.1.CertificateArn"] = ssl_cert_arn if ssl_policy: params["SslPolicy"] = ssl_policy data = self.connection.request(ROOT, params=params).object xpath = "CreateListenerResult/Listeners/member" for el in findall(element=data, xpath=xpath, namespace=NS): listener = self._to_listener(el) listener.balancer = balancer return listener def ex_create_listener_rule( self, listener, priority, target_group, action="forward", condition_field=None, condition_value=None, ): """ Create a rule for listener. :param listener: Listener object where to create rule :type listener: :class:`ALBListener` :param priority: The priority for the rule. A listener can't have multiple rules with the same priority. :type priority: ``str`` :param target_group: Target group object to associate with rule :type target_group: :class:`ALBTargetGroup` :param action: Action for the rule, valid value is 'forward' :type action: ``str`` :param condition_field: Rule condition field name. The possible values are 'host-header' and 'path-pattern'. :type condition_field: ``str`` :param condition_value: Value to match. Wildcards are supported, for example: '/img/*' :return: Rule object :rtype: :class:`ALBRule` """ condition_field = condition_field or "" condition_value = condition_value or "" # mandatory params params = { "Action": "CreateRule", "ListenerArn": listener.id, "Priority": priority, # Valid Range: Min value of 1. Max: 99999. "Actions.member.1.Type": action, "Actions.member.1.TargetGroupArn": target_group.id, # Valid values are host-header and path-pattern. "Conditions.member.1.Field": condition_field, "Conditions.member.1.Values.member.1": condition_value, } data = self.connection.request(ROOT, params=params).object xpath = "CreateRuleResult/Rules/member" for el in findall(element=data, xpath=xpath, namespace=NS): rule = self._to_rule(el) rule.listener = listener return rule def ex_get_target_group(self, target_group_id): """ Get target group object by ARN :param target_group_id: ARN of target group :type target_group_id: ``str`` :return: Target group object :rtype: :class:`ALBTargetGroup` """ # mandatory params params = { "Action": "DescribeTargetGroups", "TargetGroupArns.member.1": target_group_id, } data = self.connection.request(ROOT, params=params).object return self._to_target_groups(data)[0] def ex_get_listener(self, listener_id): """ Get listener object by ARN :param listener_id: ARN of listener object to get :type listener_id: ``str`` :return: Listener object :rtype: :class:`ALBListener` """ # mandatory params params = {"Action": "DescribeListeners", "ListenerArns.member.1": listener_id} data = self.connection.request(ROOT, params=params).object return self._to_listeners(data)[0] def ex_get_rule(self, rule_id): """ Get rule by ARN. :param rule_id: ARN of rule :type rule_id: ``str`` :return: Rule object :rtype: :class:`ALBRule` """ params = {"Action": "DescribeRules", "RuleArns.member.1": rule_id} data = self.connection.request(ROOT, params=params).object return self._to_rules(data)[0] def _to_listeners(self, data): xpath = "DescribeListenersResult/Listeners/member" return [self._to_listener(el) for el in findall(element=data, xpath=xpath, namespace=NS)] def _to_listener(self, el): listener = ALBListener( listener_id=findtext(element=el, xpath="ListenerArn", namespace=NS), protocol=findtext(element=el, xpath="Protocol", namespace=NS), port=int(findtext(element=el, xpath="Port", namespace=NS)), balancer=None, driver=self.connection.driver, action=findtext(element=el, xpath="DefaultActions/member/Type", namespace=NS), ssl_policy=findtext(element=el, xpath="SslPolicy", namespace=NS), ssl_certificate=findtext( element=el, xpath="Certificates/member/CertificateArn", namespace=NS ), ) listener._balancer_arn = findtext(element=el, xpath="LoadBalancerArn", namespace=NS) return listener def _to_balancer(self, el): balancer = LoadBalancer( id=findtext(element=el, xpath="LoadBalancerArn", namespace=NS), name=findtext(element=el, xpath="LoadBalancerName", namespace=NS), state=State.UNKNOWN, ip=findtext(el, xpath="DNSName", namespace=NS), port=None, driver=self.connection.driver, ) balancer.extra = { "listeners": self._ex_get_balancer_listeners(balancer), "tags": self._ex_get_balancer_tags(balancer), "vpc": findtext(el, xpath="VpcId", namespace=NS), } if len(balancer.extra["listeners"]) > 0: balancer.port = balancer.extra["listeners"][0].port else: balancer.port = None return balancer def _to_balancers(self, data): xpath = "DescribeLoadBalancersResult/LoadBalancers/member" return [self._to_balancer(el) for el in findall(element=data, xpath=xpath, namespace=NS)] def _to_tags(self, data): """ return tags dict """ tags = {} xpath = "DescribeTagsResult/TagDescriptions/member/Tags/member" for el in findall(element=data, xpath=xpath, namespace=NS): key = findtext(element=el, xpath="Key", namespace=NS) value = findtext(element=el, xpath="Value", namespace=NS) if key: tags[key] = value return tags def _to_rule(self, el): def __to_bool__(val): return val.lower() in ("yes", "true", "t", "1") conditions = {} cond_members = findall(element=el, xpath="Conditions/member", namespace=NS) for cond_member in cond_members: field = findtext(element=cond_member, xpath="Field", namespace=NS) conditions[field] = [] value_members = findall(element=cond_member, xpath="Values/member", namespace=NS) for value_member in value_members: conditions[field].append(value_member.text) rule = ALBRule( rule_id=findtext(element=el, xpath="RuleArn", namespace=NS), is_default=__to_bool__(findtext(element=el, xpath="IsDefault", namespace=NS)), # CreateRule API method accepts only int for priority, however # DescribeRules method returns 'default' string for default # listener rule. So leaving it as string. priority=findtext(element=el, xpath="Priority", namespace=NS), target_group=None, driver=self.connection.driver, conditions=conditions, ) rule._target_group_arn = findtext( element=el, xpath="Actions/member/TargetGroupArn", namespace=NS ) return rule def _to_rules(self, data): xpath = "DescribeRulesResult/Rules/member" return [self._to_rule(el) for el in findall(element=data, xpath=xpath, namespace=NS)] def _to_target_groups(self, data): xpath = "DescribeTargetGroupsResult/TargetGroups/member" return [ self._to_target_group(el) for el in findall(element=data, xpath=xpath, namespace=NS) ] def _to_target_group(self, el): target_group = ALBTargetGroup( target_group_id=findtext(element=el, xpath="TargetGroupArn", namespace=NS), name=findtext(element=el, xpath="TargetGroupName", namespace=NS), protocol=findtext(element=el, xpath="Protocol", namespace=NS), port=int(findtext(element=el, xpath="Port", namespace=NS)), vpc=findtext(element=el, xpath="VpcId", namespace=NS), driver=self.connection.driver, health_check_timeout=int( findtext(element=el, xpath="HealthCheckTimeoutSeconds", namespace=NS) ), health_check_port=findtext(element=el, xpath="HealthCheckPort", namespace=NS), health_check_path=findtext(element=el, xpath="HealthCheckPath", namespace=NS), health_check_proto=findtext(element=el, xpath="HealthCheckProtocol", namespace=NS), health_check_interval=int( findtext(element=el, xpath="HealthCheckIntervalSeconds", namespace=NS) ), healthy_threshold=int( findtext(element=el, xpath="HealthyThresholdCount", namespace=NS) ), unhealthy_threshold=int( findtext(element=el, xpath="UnhealthyThresholdCount", namespace=NS) ), health_check_matcher=findtext(element=el, xpath="Matcher/HttpCode", namespace=NS), ) lbs = findall(element=el, xpath="LoadBalancerArns/member", namespace=NS) target_group._balancers_arns = [lb_arn.text for lb_arn in lbs] return target_group def _to_target_group_members(self, data): xpath = "DescribeTargetHealthResult/TargetHealthDescriptions/member" return [ self._to_target_group_member(el) for el in findall(element=data, xpath=xpath, namespace=NS) ] def _to_target_group_member(self, el): member = Member( id=findtext(element=el, xpath="Target/Id", namespace=NS), ip=None, port=findtext(element=el, xpath="Target/Port", namespace=NS), balancer=None, extra={"health": findtext(element=el, xpath="TargetHealth/State", namespace=NS)}, ) return member def _ex_get_target_group_members(self, target_group): """ Return a list of target group member dicts. :param target_group: target group to fetch members for :type target_group: :class:`ALBTargetGroup` :return: list of target group members :rtype: ``list`` of :class:`Member` """ params = {"Action": "DescribeTargetHealth", "TargetGroupArn": target_group.id} data = self.connection.request(ROOT, params=params).object target_group_members = [] for tg_member in self._to_target_group_members(data): tg_member.extra["target_group"] = target_group target_group_members.append(tg_member) return target_group_members def _ex_get_balancer_listeners(self, balancer): """ Return a list of listeners associated with load balancer. :param balancer: Load balancer to fetch listeners for :type balancer: :class:`LoadBalancer` :return: list of listener objects :rtype: ``list`` of :class:`ALBListener` """ params = {"Action": "DescribeListeners", "LoadBalancerArn": balancer.id} data = self.connection.request(ROOT, params=params).object return self._to_listeners(data) def _ex_get_rules_for_listener(self, listener): """ Get list of rules associated with listener. :param listener: Listener object to fetch rules for :type listener: :class:`ALBListener` :return: List of rules :rtype: ``list`` of :class:`ALBListener` """ params = {"Action": "DescribeRules", "ListenerArn": listener.id} data = self.connection.request(ROOT, params=params).object rules = self._to_rules(data) for rule in rules: rule.listener = listener return rules def _ex_get_balancer_tags(self, balancer): """ Get a dict of load balancer tags. :param balancer: Load balancer to fetch tags for :type balancer: :class:`LoadBalancer` :return: Dictionary of tags (name/value) for load balancer :rtype: ``dict`` """ params = {"Action": "DescribeTags", "ResourceArns.member.1": balancer.id} data = self.connection.request(ROOT, params=params).object return self._to_tags(data) def _ex_connection_class_kwargs(self): pdriver = super() kwargs = pdriver._ex_connection_class_kwargs() if hasattr(self, "token") and self.token is not None: kwargs["token"] = self.token kwargs["signature_version"] = "4" else: kwargs["signature_version"] = self.signature_version return kwargs # Commented out to avoid confusion. In AWS ALB relation between load balancer # and target group/members is indirect. So it's better to go through full chain # to obtain required object(s). # Chain is: balancer->listener->rule->target group->member # # def balancer_list_members(self, balancer): # """ # List members of load balancer # # :param balancer: LoadBalancer to list members for # :type balancer: :class:`LoadBalancer` # # :rtype: ``list`` of :class:`Member` # """ # return balancer.extra.get('members', []) # # def _ex_get_balancer_members(self, balancer): # """ # Fetch members across all listeners/rules/target groups # # :param balancer: load balancer to fetch members for # :type balancer: :class:`LoadBalancer` # # :return: list of load balancer members across all target groups # :rtype: ``list`` of :class:`Member` # """ # balancer_members = [] # for listener in balancer.extra.get('listeners', []): # for rule in listener.rules: # for tg_member in rule.target_group.members: # tg_member.balancer = balancer # tg_member.extra['target_group'] = rule.target_group # balancer_members.append(tg_member) # # return balancer_members # # def _ex_get_balancer_target_groups(self, balancer): # """ # Return a list of load balancer target groups. # # :param balancer: load balancer to fetch target groups for # :type balancer: :class:`LoadBalancer` # # :rtype: ``list`` of :class:`ALBTargetGroup` # """ # params = { # 'Action': 'DescribeTargetGroups', # 'LoadBalancerArn': balancer.id # } # # data = self.connection.request(ROOT, params=params).object # # return self._to_target_groups(data)