--- /dev/null
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+#
+# Licensed 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.
+
+import urllib2
+import json
+import logging
+
+from heat.common import exception
+from heat.engine.resources import Resource
+from heat.db import api as db_api
+from heat.engine import parser
+from novaclient.exceptions import NotFound
+
+logger = logging.getLogger(__file__)
+
+lb_template = '''
+{
+ "AWSTemplateFormatVersion": "2010-09-09",
+ "Description": "Built in HAProxy server",
+ "Parameters" : {
+ "KeyName" : {
+ "Type" : "String"
+ }
+ },
+ "Resources": {
+ "LoadBalancerInstance": {
+ "Type": "AWS::EC2::Instance",
+ "Metadata": {
+ "AWS::CloudFormation::Init": {
+ "config": {
+ "packages": {
+ "yum": {
+ "haproxy" : []
+ }
+ },
+ "services": {
+ "systemd": {
+ "haproxy" : { "enabled": "true", "ensureRunning": "true" }
+ }
+ },
+ "files": {
+ "/etc/haproxy/haproxy.cfg": {
+ "content": ""},
+ "mode": "000644",
+ "owner": "root",
+ "group": "root"
+ }
+ }
+ }
+ },
+ "Properties": {
+ "ImageId": "F16-x86_64-cfntools",
+ "InstanceType": "m1.small",
+ "KeyName": { "Ref": "KeyName" },
+ "UserData": { "Fn::Base64": { "Fn::Join": ["", [
+ "#!/bin/bash -v\\n",
+ "/opt/aws/bin/cfn-init -s ",
+ { "Ref": "AWS::StackName" },
+ " --region ", { "Ref": "AWS::Region" }, "\\n"
+ ]]}}
+ }
+ }
+ },
+
+ "Outputs": {
+ "PublicIp": {
+ "Value": { "Fn::GetAtt": [ "LoadBalancerInstance", "PublicIp" ] },
+ "Description": "instance IP"
+ }
+ }
+}
+'''
+
+
+#
+# TODO(asalkeld) once we have done a couple of these composite
+# Resources we should probably make a generic CompositeResource class.
+# There will be plenty of scope for it. I resisted doing this initially
+# to see how what the other composites require.
+#
+# Also the above inline template _could_ be placed in an external file
+# at the moment this is because we will probably need to implement a
+# LoadBalancer based on keepalived as well (for for ssl support).
+#
+class LoadBalancer(Resource):
+
+ listeners_schema = {
+ 'InstancePort': {'Type': 'Integer',
+ 'Required': True},
+ 'LoadBalancerPort': {'Type': 'Integer',
+ 'Required': True},
+ 'Protocol': {'Type': 'String',
+ 'Required': True,
+ 'AllowedValues': ['TCP', 'HTTP']},
+ 'SSLCertificateId': {'Type': 'String',
+ 'Implemented': False},
+ 'PolicyNames': {'Type': 'Map',
+ 'Implemented': False}
+ }
+ healthcheck_schema = {
+ 'HealthyThreshold': {'Type': 'Integer',
+ 'Required': True},
+ 'Interval': {'Type': 'Integer',
+ 'Required': True},
+ 'Target': {'Type': 'String',
+ 'Required': True},
+ 'Timeout': {'Type': 'Integer',
+ 'Required': True},
+ 'UnHealthyTheshold': {'Type': 'Integer',
+ 'Required': True},
+ }
+
+ properties_schema = {
+ 'AvailabilityZones': {'Type': 'List',
+ 'Required': True},
+ 'HealthCheck': {'Type': 'Map',
+ 'Implemented': False,
+ 'Schema': healthcheck_schema},
+ 'Instances': {'Type': 'List'},
+ 'Listeners': {'Type': 'List',
+ 'Schema': listeners_schema},
+ 'AppCookieStickinessPolicy': {'Type': 'String',
+ 'Implemented': False},
+ 'LBCookieStickinessPolicy': {'Type': 'String',
+ 'Implemented': False},
+ 'SecurityGroups': {'Type': 'String',
+ 'Implemented': False},
+ 'Subnets': {'Type': 'List',
+ 'Implemented': False}
+ }
+
+ def __init__(self, name, json_snippet, stack):
+ Resource.__init__(self, name, json_snippet, stack)
+ self._nested = None
+
+ def _params(self):
+ # total hack - probably need an admin key here.
+ params = {'KeyName': {'Ref': 'KeyName'}}
+ p = self.stack.resolve_static_data(params)
+ return p
+
+ def nested(self):
+ if self._nested is None:
+ if self.instance_id is None:
+ return None
+
+ st = db_api.stack_get(self.stack.context, self.instance_id)
+ if not st:
+ raise exception.NotFound('Nested stack not found in DB')
+
+ n = parser.Stack(self.stack.context, st.name,
+ st.raw_template.parsed_template.template,
+ self.instance_id, self._params())
+ self._nested = n
+
+ return self._nested
+
+ def _instance_to_ipaddress(self, inst):
+ '''
+ Return the server's IP address, fetching it from Nova
+ '''
+ try:
+ server = self.nova().servers.get(inst)
+ except NotFound as ex:
+ logger.warn('Instance IP address not found (%s)' % str(ex))
+ else:
+ for n in server.networks:
+ return server.networks[n][0]
+
+ return '0.0.0.0'
+
+ def _haproxy_config(self, templ):
+ # initial simplifications:
+ # - only one Listener
+ # - static (only use Instances)
+ # - only http (no tcp or ssl)
+ #
+ # option httpchk HEAD /check.txt HTTP/1.0
+ gl = '''
+ global
+ daemon
+ maxconn 256
+
+ defaults
+ mode http
+ timeout connect 5000ms
+ timeout client 50000ms
+ timeout server 50000ms
+'''
+
+ listener = self.properties['Listeners'][0]
+ lb_port = listener['LoadBalancerPort']
+ inst_port = listener['InstancePort']
+ spaces = ' '
+ frontend = '''
+ frontend http
+ bind *:%s
+''' % (lb_port)
+
+ backend = '''
+ default_backend servers
+
+ backend servers
+ balance roundrobin
+ option http-server-close
+ option forwardfor
+'''
+ servers = []
+ n = 1
+ for i in self.properties['Instances']:
+ ip = self._instance_to_ipaddress(i)
+ servers.append('%sserver server%d %s:%s' % (spaces, n,
+ ip, inst_port))
+ n = n + 1
+
+ return '%s%s%s%s\n' % (gl, frontend, backend, '\n'.join(servers))
+
+ def handle_create(self):
+ templ = json.loads(lb_template)
+
+ md = templ['Resources']['LoadBalancerInstance']['Metadata']
+ files = md['AWS::CloudFormation::Init']['config']['files']
+ cfg = self._haproxy_config(templ)
+ files['/etc/haproxy/haproxy.cfg']['content'] = cfg
+
+ self._nested = parser.Stack(self.stack.context,
+ self.name,
+ templ,
+ parms=self._params(),
+ metadata_server=self.stack.metadata_server)
+
+ rt = {'template': templ, 'stack_name': self.name}
+ new_rt = db_api.raw_template_create(None, rt)
+
+ parent_stack = db_api.stack_get(self.stack.context, self.stack.id)
+
+ s = {'name': self.name,
+ 'owner_id': self.stack.id,
+ 'raw_template_id': new_rt.id,
+ 'user_creds_id': parent_stack.user_creds_id,
+ 'username': self.stack.context.username}
+ new_s = db_api.stack_create(None, s)
+ self._nested.id = new_s.id
+
+ pt = {'template': self._nested.t, 'raw_template_id': new_rt.id}
+ new_pt = db_api.parsed_template_create(None, pt)
+
+ self._nested.parsed_template_id = new_pt.id
+
+ self._nested.create()
+ self.instance_id_set(self._nested.id)
+
+ def handle_delete(self):
+ try:
+ stack = self.nested()
+ except exception.NotFound:
+ logger.info("Stack not found to delete")
+ else:
+ if stack is not None:
+ stack.delete()
+
+ def FnGetAtt(self, key):
+ '''
+ We don't really support any of these yet.
+ '''
+ allow = ('CanonicalHostedZoneName',
+ 'CanonicalHostedZoneNameID',
+ 'DNSName',
+ 'SourceSecurityGroupName',
+ 'SourceSecurityGroupOwnerAlias')
+
+ if not key in allow:
+ raise exception.InvalidTemplateAttribute(resource=self.name,
+ key=key)
+
+ stack = self.nested()
+ if stack is None:
+ # This seems like a hack, to get past validation
+ return ''
+ if key == 'DNSName':
+ return stack.output('PublicIp')
+ else:
+ return ''
},
"WikiServerOne": {
- "Type": "AWS::CloudFormation::Stack",
- "DependsOn": "DatabaseServer",
- "Properties": {
- "TemplateURL": "https://raw.github.com/heat-api/heat/master/templates/WordPress_And_Http.template",
- "Parameters": {
- "KeyName" : { "Ref": "KeyName" },
- "InstanceType" : { "Ref": "InstanceType" },
- "DBName" : { "Ref": "DBName" },
- "DBUsername" : { "Ref": "DBUsername" },
- "DBPassword" : { "Ref": "DBPassword" },
- "DBIpaddress" : { "Fn::GetAtt": [ "DatabaseServer", "Outputs.PublicIp" ]},
- "LinuxDistribution": { "Ref": "LinuxDistribution" }
+ "Type": "AWS::EC2::Instance",
+ "DependsOn" : "DatabaseServer",
+ "Metadata": {
+ "AWS::CloudFormation::Init": {
+ "config": {
+ "packages": {
+ "yum": {
+ "httpd" : [],
+ "wordpress" : []
+ }
+ },
+ "services": {
+ "systemd": {
+ "httpd" : { "enabled": "true", "ensureRunning": "true" }
+ }
+ }
+ }
}
+ },
+ "Properties": {
+ "ImageId": { "Fn::FindInMap": [ "DistroArch2AMI", { "Ref": "LinuxDistribution" },
+ { "Fn::FindInMap": [ "AWSInstanceType2Arch", { "Ref": "InstanceType" }, "Arch" ] } ] },
+ "InstanceType" : { "Ref": "InstanceType" },
+ "KeyName" : { "Ref": "KeyName" },
+ "UserData" : { "Fn::Base64": { "Fn::Join": ["", [
+ "#!/bin/bash -v\n",
+ "/opt/aws/bin/cfn-init\n",
+ "sed --in-place --e s/database_name_here/", { "Ref": "DBName" },
+ "/ --e s/username_here/", { "Ref": "DBUsername" },
+ "/ --e s/password_here/", { "Ref": "DBPassword" },
+ "/ --e s/localhost/", { "Fn::GetAtt": [ "DatabaseServer", "Outputs.PublicIp" ]},
+ "/ /usr/share/wordpress/wp-config.php\n"
+ ]]}}
}
},
- "LoadBalancer": {
- "Type": "AWS::CloudFormation::Stack",
- "DependsOn": "WikiServerOne",
- "Properties": {
- "TemplateURL": "https://raw.github.com/heat-api/heat/master/templates/HAProxy_Single_Instance.template",
- "Parameters": {
- "KeyName" : { "Ref": "KeyName" },
- "InstanceType" : { "Ref": "InstanceType" },
- "Server1" : { "Fn::Join": ["", [{ "Fn::GetAtt": [ "WikiServerOne", "Outputs.PublicIp" ]}, ":80"]] }
- }
+ "LoadBalancer" : {
+ "Type" : "AWS::ElasticLoadBalancing::LoadBalancer",
+ "Properties" : {
+ "AvailabilityZones" : { "Fn::GetAZs" : "" },
+ "Instances" : [{"Ref": "WikiServerOne"}],
+ "Listeners" : [ {
+ "LoadBalancerPort" : "80",
+ "InstancePort" : "80",
+ "Protocol" : "HTTP"
+ }]
}
}
},
"Outputs": {
"WebsiteURL": {
- "Value": { "Fn::Join": ["", ["http://", { "Fn::GetAtt": [ "LoadBalancer", "Outputs.PublicIp" ]}, "/wordpress"]] },
+ "Value": { "Fn::Join": ["", ["http://", { "Fn::GetAtt": [ "LoadBalancer", "DNSName" ]}, "/wordpress"]] },
"Description": "URL for Wordpress wiki"
}
}
Code Review / openstack-build / heat-build.git / commitdiff