Github user duncangrant commented on a diff in the pull request:

    https://github.com/apache/brooklyn-server/pull/292#discussion_r74493342
  
    --- Diff: 
locations/jclouds/src/main/java/org/apache/brooklyn/location/jclouds/networking/SharedLocationSecurityGroupCustomizer.java
 ---
    @@ -0,0 +1,172 @@
    +/*
    + * 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.
    + */
    +package org.apache.brooklyn.location.jclouds.networking;
    +
    +import java.util.List;
    +
    +import javax.annotation.Nullable;
    +
    +import org.apache.brooklyn.location.jclouds.BasicJcloudsLocationCustomizer;
    +import org.apache.brooklyn.location.jclouds.JcloudsLocation;
    +import org.apache.brooklyn.location.jclouds.JcloudsMachineLocation;
    +import org.apache.brooklyn.util.core.BrooklynNetworkUtils;
    +import org.apache.brooklyn.util.net.Cidr;
    +import org.jclouds.compute.ComputeService;
    +import org.jclouds.compute.domain.Template;
    +import org.jclouds.compute.options.TemplateOptions;
    +import org.jclouds.net.domain.IpPermission;
    +import org.jclouds.net.domain.IpProtocol;
    +
    +import com.google.common.base.Function;
    +import com.google.common.base.Strings;
    +import com.google.common.base.Suppliers;
    +import com.google.common.collect.FluentIterable;
    +import com.google.common.collect.Range;
    +import com.google.common.collect.RangeSet;
    +
    +/**
    + * Configures a shared security group on Jclouds locations
    + * <p>
    + * Is based on {@link JcloudsLocationSecurityGroupCustomizer} but can be 
instantiated
    + * in yaml e.g.
    + * <p>
    + * services:
    + * - type: org.apache.brooklyn.entity.software.base.EmptySoftwareProcess
    + * brooklyn.config:
    + * provisioning.properties:
    + * customizers:
    + * - $brooklyn:object:
    + * type: 
org.apache.brooklyn.location.jclouds.networking.SharedLocationSecurityGroupCustomizer
    + * object.fields: {locationName: "test", portRanges: ["900-910","915", 
"22"], cidr: "82.40.153.101/24"}
    + */
    +public class SharedLocationSecurityGroupCustomizer extends 
BasicJcloudsLocationCustomizer {
    --- End diff --
    
    I don't think there is anything worth pushing into 
JcloudsLocationSecurityGroupCustomizer.  I would have like to just modify it to 
have a no args constructor that would let us work with it in yaml but couldn't 
quite see a way to do it without changing its behaviour.
    
    It tries to be idempotent but then it also seems to catch (and ignore) the 
error if it does try to add a range a second time so possibly that can happen 
but I can't see where.


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