| /* |
| * 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.drill.exec.coord.zk; |
| |
| import com.google.common.collect.ImmutableList; |
| import org.apache.zookeeper.ZooDefs.Ids; |
| import org.apache.zookeeper.data.ACL; |
| |
| import java.util.List; |
| |
| /** |
| * ZKSecureACLProvider restricts access to znodes created by Drill in a secure installation. |
| * |
| * For all other znodes, only the creator of the znode, i.e the Drillbit user, has full access. |
| * In addition to the above, all znodes under the cluster path are readable by anyone. |
| * |
| */ |
| @ZKACLProviderTemplate(type = "creator-all") |
| public class ZKSecureACLProvider implements ZKACLProvider { |
| |
| static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(ZKSecureACLProvider.class); |
| |
| /** |
| * DEFAULT_ACL gives the creator of a znode full-access to it |
| */ |
| private static final ImmutableList<ACL> DEFAULT_ACL = new ImmutableList.Builder<ACL>() |
| .addAll(Ids.CREATOR_ALL_ACL.iterator()) |
| .build(); |
| /** |
| * DRILL_CLUSTER_ACL gives the creator full access and everyone else only read access. |
| * Used on the Drillbit discovery znode (znode path /<drill.exec.zk.root>/<drill.exec.cluster-id>) |
| * i.e. the node that contains the list of Drillbits in the cluster. |
| */ |
| private static final ImmutableList<ACL> DRILL_CLUSTER_ACL = new ImmutableList.Builder<ACL>() |
| .addAll(Ids.READ_ACL_UNSAFE.iterator()) |
| .addAll(Ids.CREATOR_ALL_ACL.iterator()) |
| .build(); |
| final String drillClusterPath; |
| |
| public ZKSecureACLProvider(ZKACLContextProvider contextProvider) { |
| this.drillClusterPath = contextProvider.getClusterPath(); |
| } |
| |
| @Override |
| public List<ACL> getDrillDefaultAcl() { |
| return DEFAULT_ACL; |
| } |
| |
| @Override |
| public List<ACL> getDrillAclForPath(String path) { |
| logger.trace("getAclForPath " + path); |
| if (path.startsWith(drillClusterPath)) { |
| logger.trace("getAclForPath drillClusterPath " + drillClusterPath); |
| return DRILL_CLUSTER_ACL; |
| } |
| return DEFAULT_ACL; |
| } |
| |
| } |