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From Clebert Suconic <clebert.suco...@gmail.com>
Subject Re: Artemis HA cluster with replication
Date Mon, 08 May 2017 12:16:00 GMT
U need either a group of servers to establish quorums or u need the network
pinger.


On Mon, May 8, 2017 at 3:46 AM martk <123martin@web.de> wrote:

> Hello,
>
> I am using ActiveMQ Artemis 1.5.4 and configured a high available cluster
> (master/slave broker) with replication (using static connectors; see main
> configuration parts below).
>
> Under normal conditions (network connection fails or process shutdown/kill)
> the switch from master to slave and backwards (desired to do by hand) works
> nearly all the time (sometimes the backup server is not in sync although
> both were parallel started for quite a time).
>
> Simulating a busy master server results in two active master broker
> (processing messages but with no replication any more). To test/reproduce I
> have done the following steps:
>
> 1. Master and slave proper started (master is live and slave is backup).
> 2. Master stopped by sending the SIGSTOP signal to the process. After some
> time the slave recognized the problem and gets live.
> 4. Sending the SIGCONT signal to the master process causes a running master
> and slave. This could then only be resolved with a manual shutdown of both
> and probably a lose of messages.
>
> I would like to ensure only one live broker at the same time and the other
> to do the backup (a shared storage is not possible).
> Maybe it can be resolved by configuration otherwise I think that is a bug
> because both server should always perform a continuous live-check.
>
>
> -------------------- master-broker.xml
> <?xml version='1.0'?>
> <configuration xmlns="urn:activemq"
>                xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>                xsi:schemaLocation="urn:activemq
> /schema/artemis-configuration.xsd">
>    <core xmlns="urn:activemq:core">
>
>       <name>master</name>
>
>       <persistence-enabled>true</persistence-enabled>
>
>       <ha-policy>
>          <replication>
>             <master>
>                <check-for-live-server>true</check-for-live-server>
>             </master>
>          </replication>
>       </ha-policy>
>
>       <connectors>
>          <connector name="netty-connector">tcp://MASTERIP:61616</connector>
>          <connector
> name="netty-backup-connector-slave">tcp://SLAVEIP:61616</connector>
>       </connectors>
>
>       <acceptors>
>          <acceptor name="netty-acceptor">tcp://MASTERIP:61616</acceptor>
>       </acceptors>
>
>       <cluster-connections>
>          <cluster-connection name="cluster">
>             <address>jms</address>
>             <connector-ref>netty-connector</connector-ref>
>             <retry-interval>500</retry-interval>
>             <use-duplicate-detection>true</use-duplicate-detection>
>             <static-connectors>
>                <connector-ref>netty-backup-connector-slave</connector-ref>
>             </static-connectors>
>          </cluster-connection>
>       </cluster-connections>
>
>    </core>
> </configuration>
>
>
> -------------------- slave-broker.xml
> <?xml version='1.0'?>
> <configuration xmlns="urn:activemq"
>                xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>                xsi:schemaLocation="urn:activemq
> /schema/artemis-configuration.xsd">
>    <core xmlns="urn:activemq:core">
>
>       <name>slave1</name>
>
>       <persistence-enabled>true</persistence-enabled>
>
>       <ha-policy>
>          <replication>
>             <slave>
>                <allow-failback>false</allow-failback>
>             </slave>
>          </replication>
>       </ha-policy>
>
>       <connectors>
>          <connector
> name="netty-live-connector">tcp://MASTERIP:61616</connector>
>          <connector name="netty-connector">tcp://SLAVEIP:61616</connector>
>       </connectors>
>
>       <acceptors>
>          <acceptor name="netty-acceptor">tcp://SLAVEIP:61616</acceptor>
>       </acceptors>
>
>       <cluster-connections>
>          <cluster-connection name="cluster">
>             <address>jms</address>
>             <connector-ref>netty-connector</connector-ref>
>             <retry-interval>500</retry-interval>
>             <use-duplicate-detection>true</use-duplicate-detection>
>             <static-connectors>
>                <connector-ref>netty-live-connector</connector-ref>
>             </static-connectors>
>          </cluster-connection>
>       </cluster-connections>
>
>    </core>
> </configuration>
>
>
> --------------------
> Regards,
> Martin
>
>
>
> --
> View this message in context:
> http://activemq.2283324.n4.nabble.com/Artemis-HA-cluster-with-replication-tp4725734.html
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
-- 
Clebert Suconic

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