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Merge pull request #56 from ggear/graham-patch-CDH-19550
CDH-9550: Whirr-CM to implement reverse proxy service
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79 changes: 79 additions & 0 deletions
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src/main/java/com/cloudera/whirr/cm/handler/CmBalancerHandler.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| /** | ||
| * Licensed to Cloudera, Inc. under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. Cloudera, Inc. 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 com.cloudera.whirr.cm.handler; | ||
|
|
||
| import static org.apache.whirr.RolePredicates.role; | ||
| import static org.jclouds.scriptbuilder.domain.Statements.call; | ||
|
|
||
| import java.io.IOException; | ||
|
|
||
| import org.apache.whirr.Cluster; | ||
| import org.apache.whirr.RolePredicates; | ||
| import org.apache.whirr.service.ClusterActionEvent; | ||
| import org.apache.whirr.service.ClusterActionHandlerSupport; | ||
| import org.apache.whirr.service.FirewallManager.Rule; | ||
| import org.jclouds.scriptbuilder.domain.Statement; | ||
|
|
||
| import com.cloudera.whirr.cm.CmConstants; | ||
| import com.cloudera.whirr.cm.CmServerClusterInstance; | ||
| import com.cloudera.whirr.cm.handler.cdh.CmCdhImpalaDaemonHandler; | ||
| import com.google.common.base.Function; | ||
| import com.google.common.base.Joiner; | ||
| import com.google.common.collect.Lists; | ||
| import com.google.common.primitives.Ints; | ||
|
|
||
| public class CmBalancerHandler extends ClusterActionHandlerSupport implements CmConstants { | ||
|
|
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| public static final String ROLE = "cm-balancer"; | ||
|
|
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| @Override | ||
| public String getRole() { | ||
| return ROLE; | ||
| } | ||
|
|
||
| @Override | ||
| protected void beforeStart(ClusterActionEvent event) throws IOException, InterruptedException { | ||
| super.beforeStart(event); | ||
| final String portBalancerImpala = CmServerClusterInstance.getConfiguration(event.getClusterSpec()).getString( | ||
| CmConstants.CONFIG_WHIRR_INTERNAL_PORT_BALANCER_IMPALA); | ||
| addStatement(event, call("retry_helpers")); | ||
| addStatement( | ||
| event, | ||
| call( | ||
| "configure_cm_balancer", | ||
| "-b", | ||
| portBalancerImpala, | ||
| "-h", | ||
| Joiner.on(',').join( | ||
| Lists.transform( | ||
| Lists.newArrayList(event.getCluster().getInstancesMatching( | ||
| RolePredicates.role(CmCdhImpalaDaemonHandler.ROLE))), new Function<Cluster.Instance, String>() { | ||
| @Override | ||
| public String apply(Cluster.Instance input) { | ||
| return input.getPrivateIp() + ":" + portBalancerImpala; | ||
| } | ||
| })))); | ||
| if (CmServerClusterInstance.getConfiguration(event.getClusterSpec()).getBoolean(CONFIG_WHIRR_FIREWALL_ENABLE, true)) { | ||
| event.getFirewallManager().addRules(Rule.create().destination(role(getRole())).ports(Integer.parseInt(portBalancerImpala))); | ||
| for (Statement portIngressStatement : event.getFirewallManager().getRulesAsStatements()) { | ||
| addStatement(event, portIngressStatement); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| # | ||
| # Licensed to Cloudera, Inc. under one or more | ||
| # contributor license agreements. See the NOTICE file distributed with | ||
| # this work for additional information regarding copyright ownership. | ||
| # Cloudera, Inc. 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. | ||
| # | ||
|
|
||
| set -x | ||
|
|
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| function configure_cm_balancer() { | ||
| local OPTIND | ||
| local OPTARG | ||
| CM_BALANCER_BIND_PORT=9090 | ||
| CM_BALANCER_HOSTS= | ||
| while getopts "b:h:" OPTION; do | ||
| case $OPTION in | ||
| b) | ||
| CM_BALANCER_BIND_PORT="$OPTARG" | ||
| ;; | ||
| h) | ||
| CM_BALANCER_HOSTS="$OPTARG" | ||
| ;; | ||
| esac | ||
| done | ||
| export IFS=, | ||
| CM_BALANCER_HOSTS_ARRAY=($CM_BALANCER_HOSTS) | ||
| if which dpkg &> /dev/null; then | ||
| retry_apt_get update | ||
| retry_apt_get -y install haproxy | ||
| elif which rpm &> /dev/null; then | ||
| retry_yum install -y haproxy | ||
| fi | ||
| CM_BALANCER_CONFIG=' | ||
| listen '$(hostname)' :'$CM_BALANCER_BIND_PORT' | ||
| mode tcp | ||
| option tcplog | ||
| balance leastconn | ||
| ' | ||
| for i in "${!CM_BALANCER_HOSTS_ARRAY[@]}"; do | ||
| CM_BALANCER_CONFIG=$CM_BALANCER_CONFIG' | ||
| server host'$i' '${CM_BALANCER_HOSTS_ARRAY[$i]} | ||
| done | ||
| echo $CM_BALANCER_CONFIG >> /etc/haproxy/haproxy.cfg | ||
| service haproxy start | ||
| } |
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