| /* |
| * 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.zookeeper.cli; |
| |
| import java.io.FileInputStream; |
| import java.util.Properties; |
| import org.apache.commons.cli.CommandLine; |
| import org.apache.commons.cli.DefaultParser; |
| import org.apache.commons.cli.Options; |
| import org.apache.commons.cli.ParseException; |
| import org.apache.zookeeper.KeeperException; |
| import org.apache.zookeeper.admin.ZooKeeperAdmin; |
| import org.apache.zookeeper.data.Stat; |
| import org.apache.zookeeper.server.quorum.QuorumPeerConfig; |
| |
| /** |
| * reconfig command for cli |
| */ |
| public class ReconfigCommand extends CliCommand { |
| |
| private static Options options = new Options(); |
| |
| /* joining - comma separated list of server config strings for servers to be added to the ensemble. |
| * Each entry is identical in syntax as it would appear in a configuration file. Only used for |
| * incremental reconfigurations. |
| */ |
| private String joining; |
| |
| /* leaving - comma separated list of server IDs to be removed from the ensemble. Only used for |
| * incremental reconfigurations. |
| */ |
| private String leaving; |
| |
| /* members - comma separated list of new membership information (e.g., contents of a membership |
| * configuration file) - for use only with a non-incremental reconfiguration. This may be specified |
| * manually via the -members flag or it will automatically be filled in by reading the contents |
| * of an actual configuration file using the -file flag. |
| */ |
| private String members; |
| |
| /* version - version of config from which we want to reconfigure - if current config is different |
| * reconfiguration will fail. Should be committed from the CLI to disable this option. |
| */ long version = -1; |
| private CommandLine cl; |
| |
| static { |
| options.addOption("s", false, "stats"); |
| options.addOption("v", true, "required current config version"); |
| options.addOption("file", true, "path of config file to parse for membership"); |
| options.addOption("members", true, "comma-separated list of config strings for " + "non-incremental reconfig"); |
| options.addOption("add", true, "comma-separated list of config strings for " + "new servers"); |
| options.addOption("remove", true, "comma-separated list of server IDs to remove"); |
| } |
| |
| public ReconfigCommand() { |
| super("reconfig", "[-s] " |
| + "[-v version] " |
| + "[[-file path] | " |
| + "[-members serverID=host:port1:port2;port3[,...]*]] | " |
| + "[-add serverId=host:port1:port2;port3[,...]]* " |
| + "[-remove serverId[,...]*]"); |
| } |
| |
| @Override |
| public CliCommand parse(String[] cmdArgs) throws CliParseException { |
| joining = null; |
| leaving = null; |
| members = null; |
| DefaultParser parser = new DefaultParser(); |
| try { |
| cl = parser.parse(options, cmdArgs); |
| } catch (ParseException ex) { |
| throw new CliParseException(ex); |
| } |
| if (!(cl.hasOption("file") || cl.hasOption("members")) && !cl.hasOption("add") && !cl.hasOption("remove")) { |
| throw new CliParseException(getUsageStr()); |
| } |
| if (cl.hasOption("v")) { |
| try { |
| version = Long.parseLong(cl.getOptionValue("v"), 16); |
| } catch (NumberFormatException e) { |
| throw new CliParseException("-v must be followed by a long (configuration version)"); |
| } |
| } else { |
| version = -1; |
| } |
| |
| // Simple error checking for conflicting modes |
| if ((cl.hasOption("file") || cl.hasOption("members")) && (cl.hasOption("add") || cl.hasOption("remove"))) { |
| throw new CliParseException("Can't use -file or -members together with -add or -remove (mixing incremental" |
| + " and non-incremental modes is not allowed)"); |
| } |
| if (cl.hasOption("file") && cl.hasOption("members")) { |
| throw new CliParseException("Can't use -file and -members together (conflicting non-incremental modes)"); |
| } |
| |
| // Set the joining/leaving/members values based on the mode we're in |
| if (cl.hasOption("add")) { |
| joining = cl.getOptionValue("add").toLowerCase(); |
| } |
| if (cl.hasOption("remove")) { |
| leaving = cl.getOptionValue("remove").toLowerCase(); |
| } |
| if (cl.hasOption("members")) { |
| members = cl.getOptionValue("members").toLowerCase(); |
| } |
| if (cl.hasOption("file")) { |
| try { |
| Properties dynamicCfg = new Properties(); |
| try (FileInputStream inConfig = new FileInputStream(cl.getOptionValue("file"))) { |
| dynamicCfg.load(inConfig); |
| } |
| //check that membership makes sense; leader will make these checks again |
| //don't check for leader election ports since |
| //client doesn't know what leader election alg is used |
| members = QuorumPeerConfig.parseDynamicConfig(dynamicCfg, 0, true, false).toString(); |
| } catch (Exception e) { |
| throw new CliParseException("Error processing " + cl.getOptionValue("file") + e.getMessage()); |
| } |
| } |
| return this; |
| } |
| |
| @Override |
| public boolean exec() throws CliException { |
| try { |
| Stat stat = new Stat(); |
| if (!(zk instanceof ZooKeeperAdmin)) { |
| // This should never happen when executing reconfig command line, |
| // because it is guaranteed that we have a ZooKeeperAdmin instance ready |
| // to use in CliCommand stack. |
| // The only exception would be in test code where clients can directly set |
| // ZooKeeper object to ZooKeeperMain. |
| return false; |
| } |
| |
| byte[] curConfig = ((ZooKeeperAdmin) zk).reconfigure(joining, leaving, members, version, stat); |
| out.println("Committed new configuration:\n" + new String(curConfig)); |
| |
| if (cl.hasOption("s")) { |
| new StatPrinter(out).print(stat); |
| } |
| } catch (KeeperException | InterruptedException ex) { |
| throw new CliWrapperException(ex); |
| } |
| return false; |
| } |
| |
| } |