use the 1.3 version of ec2_elb

the 1.5 version has issues

playbooks/edx-east/edx_provision.yml

@@ -61,7 +61,7 @@
       sudo: False
     - name: register instance into an elb if one was provided
       local_action:
-        module: ec2_elb_local_1.5
+        module: ec2_elb_local_1.3
         region: "{{ region }}"
         instance_id: "{{ ec2_info.instance_ids[0] }}"
         state: present

playbooks/library/ec2_elb_local_1.3

+#!/usr/bin/python
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+DOCUMENTATION = """
+---
+module: ec2_elb
+short_description: De-registers or registers instances from EC2 ELB(s)
+description:
+  - This module de-registers or registers an AWS EC2 instance from the ELB(s)
+    that it belongs to.
+  - Returns fact "ec2_elbs" which is a list of elbs attached to the instance
+    if state=absent is passed as an argument.
+  - Will be marked changed when called only if there are ELBs found to operate on.
+version_added: "1.2"
+requirements: [ "boto" ]
+author: John Jarvis
+options:
+  state:
+    description:
+      - register or deregister the instance
+    required: true
+
+  instance_id:
+    description:
+      - EC2 Instance ID
+    required: true
+
+  ec2_elbs:
+    description:
+      - List of ELB names, required for registration. The ec2_elbs fact should be used if there was a previous de-register.
+    required: false
+    default: None
+  aws_secret_key:
+    description:
+      - AWS secret key. If not set then the value of the AWS_SECRET_KEY environment variable is used. 
+    required: false
+    def2ault: None
+    aliases: ['ec2_secret_key', 'secret_key' ]
+  aws_access_key:
+    description:
+      - AWS access key. If not set then the value of the AWS_ACCESS_KEY environment variable is used.
+    required: false
+    default: None
+    aliases: ['ec2_access_key', 'access_key' ]
+  region:
+    description:
+      - The AWS region to use. If not specified then the value of the EC2_REGION environment variable, if any, is used.
+    required: false
+    aliases: ['aws_region', 'ec2_region']
+  wait:
+    description:
+      - Wait for instance registration or deregistration to complete successfully before returning.  
+    required: false
+    default: yes
+    choices: [ "yes", "no" ] 
+
+"""
+
+EXAMPLES = """
+# basic pre_task and post_task example
+pre_tasks:
+  - name: Gathering ec2 facts
+    ec2_facts:
+  - name: Instance De-register
+    local_action: ec2_elb
+    args:
+      instance_id: "{{ ansible_ec2_instance_id }}"
+      state: 'absent'
+roles:
+  - myrole
+post_tasks:
+  - name: Instance Register
+    local_action: ec2_elb
+    args:
+      instance_id: "{{ ansible_ec2_instance_id }}"
+      ec2_elbs: "{{ item }}"
+      state: 'present'
+    with_items: ec2_elbs
+"""
+
+import time
+import sys
+import os
+
+AWS_REGIONS = ['ap-northeast-1',
+               'ap-southeast-1',
+               'ap-southeast-2',
+               'eu-west-1',
+               'sa-east-1',
+               'us-east-1',
+               'us-west-1',
+               'us-west-2']
+
+try:
+    import boto
+    import boto.ec2.elb
+    from boto.regioninfo import RegionInfo
+except ImportError:
+    print "failed=True msg='boto required for this module'"
+    sys.exit(1)
+
+class ElbManager:
+    """Handles EC2 instance ELB registration and de-registration"""
+
+    def __init__(self, module, instance_id=None, ec2_elbs=None,
+                 aws_access_key=None, aws_secret_key=None, region=None):
+        self.aws_access_key = aws_access_key
+        self.aws_secret_key = aws_secret_key
+        self.module = module
+        self.instance_id = instance_id
+        self.region = region
+        self.lbs = self._get_instance_lbs(ec2_elbs)
+
+        # if there are no ELBs to operate on
+        # there will be no changes made
+        if len(self.lbs) > 0:
+            self.changed = True
+        else:
+            self.changed = False
+
+    def deregister(self, wait):
+        """De-register the instance from all ELBs and wait for the ELB
+        to report it out-of-service"""
+
+        for lb in self.lbs:
+            lb.deregister_instances([self.instance_id])
+            if wait: 
+                self._await_elb_instance_state(lb, 'OutOfService')
+
+    def register(self, wait):
+        """Register the instance for all ELBs and wait for the ELB
+        to report the instance in-service"""
+
+        for lb in self.lbs:
+            lb.register_instances([self.instance_id])
+            if wait:
+                self._await_elb_instance_state(lb, 'InService')
+
+    def exists(self, lbtest):
+        """ Verify that the named ELB actually exists """
+        
+        found = False
+        for lb in self.lbs:
+            if lb.name == lbtest:
+                found=True
+                break
+        return found
+
+
+    def _await_elb_instance_state(self, lb, awaited_state):
+        """Wait for an ELB to change state
+        lb: load balancer
+        awaited_state : state to poll for (string)"""
+
+        while True:
+            state = lb.get_instance_health([self.instance_id])[0].state
+            if state == awaited_state:
+                break
+            else:
+                time.sleep(1)
+
+    def _get_instance_lbs(self, ec2_elbs=None):
+        """Returns a list of ELBs attached to self.instance_id
+        ec2_elbs: an optional list of elb names that will be used
+                  for elb lookup instead of returning what elbs
+                  are attached to self.instance_id"""
+
+        try:
+            endpoint="elasticloadbalancing.%s.amazonaws.com" % self.region
+            connect_region = RegionInfo(name=self.region, endpoint=endpoint)
+            elb = boto.ec2.elb.ELBConnection(self.aws_access_key, self.aws_secret_key, region=connect_region)
+        except boto.exception.NoAuthHandlerFound, e:
+            self.module.fail_json(msg=str(e))
+
+        elbs = elb.get_all_load_balancers()
+
+        if ec2_elbs:
+            lbs = sorted(lb for lb in elbs if lb.name in ec2_elbs)
+        else:
+            lbs = []
+            for lb in elbs:
+                for info in lb.instances:
+                    if self.instance_id == info.id:
+                        lbs.append(lb)
+        return lbs
+
+
+def main():
+
+    module = AnsibleModule(
+        argument_spec=dict(
+            state={'required': True,
+                    'choices': ['present', 'absent']},
+            instance_id={'required': True},
+            ec2_elbs={'default': None, 'required': False, 'type':'list'},
+            aws_secret_key={'default': None, 'aliases': ['ec2_secret_key', 'secret_key'], 'no_log': True},
+            aws_access_key={'default': None, 'aliases': ['ec2_access_key', 'access_key']},
+            region={'default': None, 'required': False, 'aliases':['aws_region', 'ec2_region'], 'choices':AWS_REGIONS},
+            wait={'required': False, 'choices': BOOLEANS, 'default': True}
+        )
+    )
+
+    aws_secret_key = module.params['aws_secret_key']
+    aws_access_key = module.params['aws_access_key']
+    ec2_elbs = module.params['ec2_elbs']
+    region = module.params['region']
+    wait = module.params['wait']
+
+    if module.params['state'] == 'present' and 'ec2_elbs' not in module.params:
+        module.fail_json(msg="ELBs are required for registration")
+
+    if not aws_secret_key:
+        if  'AWS_SECRET_KEY' in os.environ:
+            aws_secret_key = os.environ['AWS_SECRET_KEY']
+        elif 'EC2_SECRET_KEY' in os.environ:
+            aws_secret_key = os.environ['EC2_SECRET_KEY']
+
+    if not aws_access_key:
+        if 'AWS_ACCESS_KEY' in os.environ:
+            aws_access_key = os.environ['AWS_ACCESS_KEY']
+        elif 'EC2_ACCESS_KEY' in os.environ:
+            aws_access_key = os.environ['EC2_ACCESS_KEY']
+
+    if not region:
+        if 'AWS_REGION' in os.environ:
+            region = os.environ['AWS_REGION']
+        elif 'EC2_REGION' in os.environ:
+            region = os.environ['EC2_REGION']
+
+    if not region:
+        module.fail_json(msg=str("Either region or EC2_REGION environment variable must be set."))
+
+    instance_id = module.params['instance_id']
+    elb_man = ElbManager(module, instance_id, ec2_elbs, aws_access_key,
+                         aws_secret_key, region=region)
+
+    for elb in ec2_elbs:
+        if not elb_man.exists(elb):
+            msg="ELB %s does not exist" % elb
+            module.fail_json(msg=msg)
+
+    if module.params['state'] == 'present':
+        elb_man.register(wait)
+    elif module.params['state'] == 'absent':
+        elb_man.deregister(wait)
+
+    ansible_facts = {'ec2_elbs': [lb.name for lb in elb_man.lbs]}
+    ec2_facts_result = dict(changed=elb_man.changed, ansible_facts=ansible_facts)
+
+    module.exit_json(**ec2_facts_result)
+
+# this is magic, see lib/ansible/module_common.py
+#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
+
+main()