vertx集群配置
1. pom文件中引入vertx-hazelcast jar
<dependency><groupId>io.vertx</groupId><artifactId>vertx-hazelcast</artifactId><version>${vertx-version}</version>
</dependency>目前是3.3.3版本
2. resources内加入hazelcast的配置文件cluster.xml
默认vertx会去找vertx-hazelcast.jar内的default-cluster.xml
如果需要自定义配置文件，需要将其放在classpath下，并且命名为cluster.xml，即打成fat包后在主目录下面。
eclipse的java项目只需将default-cluster.xml文件copy一份到resources目录内，并修改名字为cluster.xml，打包的时候就会打到classpath的主目录下。
3. cluster.xml配置
hazelcast的集群有3种方式
- 广播multicast模式
<multicast enabled="true"><multicast-group>224.2.2.3</multicast-group><multicast-port>54327</multicast-port>
</multicast>如果为true，同一个网段内的vertx实例会自动发现，并集群
2. ip地址tcp-ip模式
<tcp-ip enabled="true"><interface>192.168.1.28</interface><interface>192.168.1.27</interface><interface>192.168.1.26</interface>
</tcp-ip>需要把要集群的ip地址列在这里
3. aws亚马逊云集群模式
<aws enabled="false"><access-key>my-access-key</access-key><secret-key>my-secret-key</secret-key><!--optional, default is us-east-1 --><region>us-west-1</region><!--optional, default is ec2.amazonaws.com. If set, region shouldn't be set as it will override this property --><host-header>ec2.amazonaws.com</host-header><!-- optional, only instances belonging to this group will be discovered, default will try all running instances --><security-group-name>hazelcast-sg</security-group-name><tag-key>type</tag-key><tag-value>hz-nodes</tag-value>
</aws>一般采用第二种ip地址tcp-ip模式，将其它模式置为false。整体的cluster.xml文件：
<?xml version="1.0" encoding="UTF-8"?>
<hazelcast xsi:schemaLocation="http://www.hazelcast.com/schema/config hazelcast-config-3.2.xsd"xmlns="http://www.hazelcast.com/schema/config"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><properties><property name="hazelcast.mancenter.enabled">false</property><property name="hazelcast.memcache.enabled">false</property><property name="hazelcast.rest.enabled">false</property><property name="hazelcast.wait.seconds.before.join">0</property></properties><group><name>dev</name><password>dev-pass</password></group><management-center enabled="false">http://localhost:8080/mancenter</management-center><network><port auto-increment="true" port-count="10000">5701</port><outbound-ports><!--Allowed port range when connecting to other nodes.0 or * means use system provided port.--><ports>0</ports></outbound-ports><join><multicast enabled="false"><multicast-group>224.2.2.3</multicast-group><multicast-port>54327</multicast-port></multicast><tcp-ip enabled="true"><interface>192.168.1.28</interface><interface>192.168.1.27</interface><interface>192.168.1.26</interface></tcp-ip><aws enabled="false"><access-key>my-access-key</access-key><secret-key>my-secret-key</secret-key><!--optional, default is us-east-1 --><region>us-west-1</region><!--optional, default is ec2.amazonaws.com. If set, region shouldn't be set as it will override this property --><host-header>ec2.amazonaws.com</host-header><!-- optional, only instances belonging to this group will be discovered, default will try all running instances --><security-group-name>hazelcast-sg</security-group-name><tag-key>type</tag-key><tag-value>hz-nodes</tag-value></aws></join><interfaces enabled="false"><interface>10.10.1.*</interface></interfaces><ssl enabled="false"/><socket-interceptor enabled="false"/><symmetric-encryption enabled="false"><!--encryption algorithm such asDES/ECB/PKCS5Padding,PBEWithMD5AndDES,AES/CBC/PKCS5Padding,Blowfish,DESede--><algorithm>PBEWithMD5AndDES</algorithm><!-- salt value to use when generating the secret key --><salt>thesalt</salt><!-- pass phrase to use when generating the secret key --><password>thepass</password><!-- iteration count to use when generating the secret key --><iteration-count>19</iteration-count></symmetric-encryption></network><partition-group enabled="false"/><executor-service name="default"><pool-size>16</pool-size><!--Queue capacity. 0 means Integer.MAX_VALUE.--><queue-capacity>0</queue-capacity></executor-service><multimap name="__vertx.subs"><!--Number of backups. If 1 is set as the backup-count for example,then all entries of the map will be copied to another JVM forfail-safety. 0 means no backup.--><backup-count>1</backup-count></multimap><map name="__vertx.haInfo"><!--Number of backups. If 1 is set as the backup-count for example,then all entries of the map will be copied to another JVM forfail-safety. 0 means no backup.--><backup-count>1</backup-count><!--Maximum number of seconds for each entry to stay in the map. Entries that areolder than <time-to-live-seconds> and not updated for <time-to-live-seconds>will get automatically evicted from the map.Any integer between 0 and Integer.MAX_VALUE. 0 means infinite. Default is 0.
--><time-to-live-seconds>0</time-to-live-seconds><!--Maximum number of seconds for each entry to stay idle in the map. Entries that areidle(not touched) for more than <max-idle-seconds> will getautomatically evicted from the map. Entry is touched if get, put or containsKey is called.Any integer between 0 and Integer.MAX_VALUE. 0 means infinite. Default is 0.
--><max-idle-seconds>0</max-idle-seconds><!--Valid values are:NONE (no eviction),LRU (Least Recently Used),LFU (Least Frequently Used).NONE is the default.--><eviction-policy>NONE</eviction-policy><!--Maximum size of the map. When max size is reached,map is evicted based on the policy defined.Any integer between 0 and Integer.MAX_VALUE. 0 meansInteger.MAX_VALUE. Default is 0.--><max-size policy="PER_NODE">0</max-size><!--When max. size is reached, specified percentage ofthe map will be evicted. Any integer between 0 and 100.If 25 is set for example, 25% of the entries willget evicted.--><eviction-percentage>25</eviction-percentage><!--While recovering from split-brain (network partitioning),map entries in the small cluster will merge into the bigger clusterbased on the policy set here. When an entry merge into thecluster, there might an existing entry with the same key already.Values of these entries might be different for that same key.Which value should be set for the key? Conflict is resolved bythe policy set here. Default policy is PutIfAbsentMapMergePolicyThere are built-in merge policies such ascom.hazelcast.map.merge.PassThroughMergePolicy; entry will be added if there is no existing entry for the key.com.hazelcast.map.merge.PutIfAbsentMapMergePolicy ; entry will be added if the merging entry doesn't exist in the cluster.com.hazelcast.map.merge.HigherHitsMapMergePolicy ; entry with the higher hits wins.com.hazelcast.map.merge.LatestUpdateMapMergePolicy ; entry with the latest update wins.--><merge-policy>com.hazelcast.map.merge.LatestUpdateMapMergePolicy</merge-policy></map><!-- Used internally in Vert.x to implement async locks --><semaphore name="__vertx.*"><initial-permits>1</initial-permits></semaphore></hazelcast>
4. 集群方式运行fat.jar包
java -jar F:\work\i5xwxpro\target\i5xwxpro.jar -cluster分别在对应的服务器上执行命令即可。
-cluster即是代表集群方式启动
5. nginx负载均衡
upstream web{server 192.168.1.28:8080;server 192.168.1.27:8080;server 192.168.1.26:8080;}nginx将请求负载到不同的vertx服务器即可
