Difference between revisions of "JMS server: ActiveMQ"
 
(8 intermediate revisions by the same user not shown)
Line 1: Line 1:
 +
[[Category:Linux]]
 +
[[Category:Development]]
 +
 
=Manual installation=
 
=Manual installation=
  
Line 114: Line 117:
  
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
−
# INPUT
+
#### INPUT
−
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 5672 -j ACCEPT
+
# messages
−
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 8161 -j ACCEPT
+
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 5672 -j ACCEPT       # AMQP port
−
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 8162 -j ACCEPT
+
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 61616 -j ACCEPT    # JMS port
−
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 11099 -j ACCEPT
+
 
−
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 61616 -j ACCEPT
+
# web monitoring
 +
#$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 8161 -j ACCEPT     # HTTP web-console. Not required if you're using Apache2 proxy
 +
#$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 8162 -j ACCEPT     # HTTPs web-console. Not required if you're using Apache2 proxy
 +
 
 +
# JMX monitoring
 +
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 1099 -j ACCEPT     # JVM default RMI port
 +
#$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 11099 -j ACCEPT   # JMX standalone port. Not required if you're using default JVM JMX connector on TCP 1616
  
 
# Output
 
# Output
 
$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 5672 -j ACCEPT  
 
$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 5672 -j ACCEPT  
 +
$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 61616 -j ACCEPT
 +
 
$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 8161 -j ACCEPT
 
$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 8161 -j ACCEPT
 
$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 8162 -j ACCEPT
 
$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 8162 -j ACCEPT
 +
 +
$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 1099 -j ACCEPT
 
$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 11099 -j ACCEPT
 
$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 11099 -j ACCEPT
−
$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 61616 -j ACCEPT
 
 
</syntaxhighlight>
 
</syntaxhighlight>
 +
 +
 +
 +
= Logs =
 +
 +
The application's logs are in $ACTIVEMQ/data/activemq.log
 +
 +
<syntaxhighlight lang="bash">
 +
cat /opt/activemq/data/activemq.log
 +
</syntaxhighlight>
 +
  
  
Line 193: Line 216:
 
$ACTIVEMQ/conf/jetty.xml
 
$ACTIVEMQ/conf/jetty.xml
  
−
===Adjust settings===
+
===Adjust broker name and listening port===
 
At the bottom, edit connector :
 
At the bottom, edit connector :
 
<syntaxhighlight lang="xml">
 
<syntaxhighlight lang="xml">
Line 208: Line 231:
  
  
−
==Change root context for Web-Console==
+
===Change root context for Web-Console===
  
 
Edit "jetty.xml" [look to the previous §]
 
Edit "jetty.xml" [look to the previous §]
  
−
Add a new ''securityConstraintMapping'' (line 40), " /activemq/* "
+
Add 2 new ''securityConstraintMapping'' (line 40), " /activemq/*,/activemq-api/*, "
 
<syntaxhighlight lang="xml">
 
<syntaxhighlight lang="xml">
 
<bean id="securityConstraintMapping" class="org.eclipse.jetty.security.ConstraintMapping">
 
<bean id="securityConstraintMapping" class="org.eclipse.jetty.security.ConstraintMapping">
Line 221: Line 244:
  
  
−
Change the ''WebAppContext.contextpath'' value to " /activemq " instead of " /admin "
+
Change:
 +
* ''WebAppContext.contextpath'' value to " /activemq " instead of " /admin "
 +
* ''WebAppContext.contextpath'' value to " /activemq-api " instead of " /api "
 +
 
 
<syntaxhighlight lang="xml">
 
<syntaxhighlight lang="xml">
 
   <property name="handler">
 
   <property name="handler">
Line 233: Line 259:
 
                     <property name="logUrlOnStart" value="true" />
 
                     <property name="logUrlOnStart" value="true" />
 
                 </bean>
 
                 </bean>
 +
                ...
 +
                <bean class="org.eclipse.jetty.webapp.WebAppContext">
 +
                    <property name="contextPath" value="/activemq-api" />
 +
                    <property name="resourceBase" value="${activemq.home}/webapps/api" />
 +
                    <property name="logUrlOnStart" value="true" />
 +
                </bean>
 +
                ...
 +
</syntaxhighlight>
 +
 +
 +
 +
===Manage web-users===
 +
<syntaxhighlight lang="bash">
 +
vim /opt/activemq/conf/jetty-realm.properties
 +
</syntaxhighlight>
 +
 +
Edit last line
 +
<syntaxhighlight lang="bash">
 +
    admin: admin, admin
 +
</syntaxhighlight>
 +
 +
 +
===Apache 2 Virtual host and mod_proxy===
 +
Instead of using the port 8161, you can use Apache 2 mod_proxy.
 +
 +
!!CAREFUL!! '''You must let the HTTP access to the REST API'''.
 +
 +
Apache2 Virtual Host configuration:
 +
<syntaxhighlight lang="xml">
 +
<VirtualHost *:80>
 +
ServerAdmin guillaume.diaz@vehco.com
 +
ServerName preprodrtd.vehco.com
 +
 +
## Proxy
 +
ProxyVia On
 +
        ProxyPreserveHost On
 +
        <Proxy *>
 +
            AddDefaultCharset off
 +
            Order deny,allow
 +
            Allow from all
 +
</Proxy>
 +
 +
# Active MQ REST web-service, required for hawt.io management
 +
ProxyPass /activemq-api http://localhost:8161/activemq-api
 +
ProxyPassReverse /activemq-api http://localhost:8161/activemq-api
 +
 +
# Redirect everything else to HTTPS
 +
Redirect permanent / https://preprodrtd.vehco.com/
 +
</VirtualHost>
 +
 +
<VirtualHost *:443>
 +
        ...       
 +
## Proxy
 +
ProxyVia On
 +
        ProxyPreserveHost On
 +
        <Proxy *>
 +
            AddDefaultCharset off
 +
            Order deny,allow
 +
            Allow from all
 +
            Satisfy Any
 +
        </Proxy>
 +
 +
 +
        # ActiveMq HTTP web-console
 +
ProxyPass /activemq http://localhost:8161/activemq
 +
ProxyPassReverse /activemq http://localhost:8161/activemq
 +
 +
        # ActiveMq REST web-services, required for hawt.io
 +
ProxyPass /activemq-api http://localhost:8161/activemq-api
 +
ProxyPassReverse /activemq-api http://localhost:8161/activemq-api
 +
</VirtualHost>
 +
</syntaxhighlight>
 +
 +
 +
===Remote management using HAWT.IO===
 +
Hawt.io is a wonderful management tool. You can use it to manage a lot of JAVA services, including ActiveMQ ; JMX ; etc.
 +
 +
 +
Official website: http://hawt.io/
 +
* Download URL: http://hawt.io/getstarted/index.html  > You should download the ''hwatio.jar'' file
 +
 +
 +
To execute the program, just run:
 +
<syntaxhighlight lang="bash">
 +
java -jar hawtio-app-1.3.1.jar --port 8090
 +
</syntaxhighlight>
 +
Don't hesitate to adjust the port number to your own needs! Default is 8080, which might already been used by Tomcat or Glassfish.
 +
 +
Go to http://localhost:8090/hawtio
 +
 +
 +
Then, configure the following remote connection:
 +
 +
[[File:Hawt.io_ActiveMQ.png|none|Margins]]
 +
 +
Enjoy ActiveMQ !
 +
 +
=Enable JMX remote management and monitoring=
 +
 +
Official documentation: http://activemq.apache.org/jmx.html
 +
 +
 +
==Add JMX support==
 +
Edit configuration:
 +
<syntaxhighlight lang="bash">
 +
vim /opt/activemq/conf/activemq.xml
 +
</syntaxhighlight>
 +
  
−
                ...
+
Adjust the broker tag (line 35), add '''useJmx="true"'''
 +
<syntaxhighlight lang="xml">
 +
<broker xmlns="http://activemq.apache.org/schema/core" useJmx="true" brokerName="preprodrtd.vehco.com" dataDirectory="${activemq.data}">
 +
...
 +
</broker>
 +
</syntaxhighlight>
 +
 
 +
 
 +
Make sure that you're using a new JVM connector (line 65):
 +
<syntaxhighlight lang="xml">
 +
<broker xmlns="http://activemq.apache.org/schema/core" useJmx="true" brokerName="preprodrtd.vehco.com" dataDirectory="${activemq.data}">
 +
  ...
 +
  <managementContext>
 +
    <managementContext createConnector="true" />
 +
  </managementContext>
 +
  ...
 +
</broker>
 +
</syntaxhighlight>
 +
 
 +
 
 +
==Create JMX users==
 +
* User creation
 +
 
 +
<syntaxhighlight lang="bash">
 +
vim /opt/activemq/conf/jmx.access
 +
</syntaxhighlight>
 +
 
 +
Add some users. As a reminder:
 +
<syntaxhighlight lang="bash">
 +
userMq readonly
 +
adminMq readwrite
 +
</syntaxhighlight>
 +
 
 +
 
 +
* User password
 +
 
 +
<syntaxhighlight lang="bash">
 +
vim /opt/activemq/conf/jmx.password
 +
</syntaxhighlight>
 +
 
 +
Set passwords. Usernames must match!
 +
<syntaxhighlight lang="bash">
 +
userMq abc123
 +
adminMq abcd1234
 +
</syntaxhighlight>
 +
 
 +
 
 +
==JMX settings==
 +
Edit activemq launcher
 +
<syntaxhighlight lang="bash">
 +
vim /opt/activemq/bin/activemq
 +
</syntaxhighlight>
 +
 
 +
Search for ACTIVEMQ_JMX and adjust the lines to:
 +
<syntaxhighlight lang="bash">
 +
# ACTIVEMQ_SUNJMX_START="-Dcom.sun.management.jmxremote.port=11099 "
 +
ACTIVEMQ_SUNJMX_START="-Dcom.sun.management.jmxremote.rmi.port=1099 "
 +
ACTIVEMQ_SUNJMX_START="$ACTIVEMQ_SUNJMX_START -Dcom.sun.management.jmxremote.password.file=${ACTIVEMQ_CONF}/jmx.password"
 +
ACTIVEMQ_SUNJMX_START="$ACTIVEMQ_SUNJMX_START -Dcom.sun.management.jmxremote.access.file=${ACTIVEMQ_CONF}/jmx.access"
 +
ACTIVEMQ_SUNJMX_START="$ACTIVEMQ_SUNJMX_START -Dcom.sun.management.jmxremote.ssl=false"
 +
ACTIVEMQ_SUNJMX_START="$ACTIVEMQ_SUNJMX_START -Dcom.sun.management.jmxremote"
 
</syntaxhighlight>
 
</syntaxhighlight>
 +
 +
!! Note that the '''default JVM RMI port''' will be used [TCP 1099] instead of the standalone one. !!
 +
 +
 +
No you can access the console remotely using Jconsole or any other client.
 +
 +
URL:  service:jmx:rmi:///jndi/rmi://'''<your hostname>''':1099/jmxrmi
 +
 +
 +
==JMX client==
 +
 +
===Jconsole===
 +
 +
You can use JConsole (included in Java JDK) to access the server.
 +
 +
 +
===ActiveMQ Browser  (windows)===
 +
 +
* Download the latest version of the application: http://sourceforge.net/projects/activemqbrowser/
 +
 +
* Unzip the file and put it in " /opt/activemq-browser "
 +
 +
* just run the .bat file
  
  

Latest revision as of 17:18, 10 June 2014


Manual installation

Installation

Get Apache Active MQ

Get the latest binary version from: http://activemq.apache.org/download.html

Program setup

  • Copy archive to /opt/ directory:
mv apache-activemq-5.9.1-bin.zip /opt/
cd /opt/
  • Unzip and create simlink
unzip apache-activemq-5.9.1-bin.zip
ln -s /opt/apache-activemq-5.9.1/ /opt/activemq/
  • Set executable flag and symlinks
chmod 755 /opt/activemq/bin/activemq
ln -s /opt/activemq/bin/activemq /usr/bin/activemq
ln -s /opt/activemq/bin/activemq /etc/init.d/activemq

Rights adjustments

  • Add non privileged account
adduser -system activemq
addgroup -system activemq
  • Adjust user shell

Edit: 

vim /etc/passwd

Adjust the user SHELL 

activemq:x:116:65534::/home/activemq:/bin/bash
  • Adjust user group

Edit: 

vim /etc/group

Adjust the group membership 

activemq:x:1001:activemq
  • Set MQ folder privileges
chown -R activemq:activemq /opt/apache-activemq-5.9.1/
chown -R activemq:activemq /opt/activemq/

Basic configuration

Home + User

  • Set home and user

Edit 

vim /opt/activemq/bin/activemq

Set after "Configuration" (line ~ 40) 

ACTIVEMQ_HOME=”/opt/activemq”
ACTIVEMQ_USER=”activemq”

Runtime configuration

  • Create runtime configuration. Generate default settings
/opt/activemq/bin/activemq setup /etc/default/activemq
  • Adjust configuration rights
chown root:nogroup /etc/default/activemq
chmod 600 /etc/default/activemq

Add ActiveMQ to boot sequence

cd /etc/init.d
update-rc.d activemq defaults

Remove ActiveMq from boot sequence

update-rc.d -f activemq remove
rm /etc/init.d/activemq


Setup firewall

This is the list of ports that are used by ActiveMQ:

  • port 61616 = JMS queue access
  • port 11099 = JMX remote console (connector port)
  • port 8161 = HTTP manager
  • port 8162 = HTTPS manager
  • port 5672 = AMQP port

Edit your firewall script: 

vim /etc/firewall/firewall-start.sh


#### INPUT
# messages
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 5672 -j ACCEPT       # AMQP port
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 61616 -j ACCEPT     # JMS port

# web monitoring
#$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 8161 -j ACCEPT     # HTTP web-console. Not required if you're using Apache2 proxy
#$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 8162 -j ACCEPT     # HTTPs web-console. Not required if you're using Apache2 proxy

# JMX monitoring
$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 1099 -j ACCEPT      # JVM default RMI port
#$IPTABLES -A INPUT -p tcp -m state --state NEW --dport 11099 -j ACCEPT    # JMX standalone port. Not required if you're using default JVM JMX connector on TCP 1616

# Output
$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 5672 -j ACCEPT 
$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 61616 -j ACCEPT

$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 8161 -j ACCEPT
$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 8162 -j ACCEPT

$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 1099 -j ACCEPT
$IPTABLES -A OUTPUT -p tcp -m state --state NEW --dport 11099 -j ACCEPT


Logs

The application's logs are in $ACTIVEMQ/data/activemq.log 

cat /opt/activemq/data/activemq.log


Advanced Configuration (all O.S)

Broker settings

Edit configuration file

  • Linux ~ manual
vim /opt/activemq/conf/activemq.xml
  • Linux ~ auto
vim /etc/activemq/instances-enabled/main/activemq.xml
  • Windows

$ACTIVEMQ/conf/activemq.xml


Adjust broker setting

  • Set broker name
<broker     xmlns="http://activemq.apache.org/schema/core"
        brokerName="myServerName"
       dataDirectory="${activemq.base}/data">
  • Set listener to all interfaces (0.0.0.0)
<transportConnectors>
        <transportConnector name="openwire" uri="tcp://0.0.0.0:61616"/>
</transportConnectors>
  • Limit queues size​
<systemUsage>
 <systemUsage>
  <memoryUsage>
   <memoryUsage limit="64 mb"/>
  </memoryUsage>
  <storeUsage>
   <storeUsage limit="100 gb"/>
  </storeUsage>
  <tempUsage>
   <tempUsage limit="50 gb"/>
  </tempUsage>
 </systemUsage>
</systemUsage>


Enable HTTP web console

Edit your jetty configuration

Linux ~ Manual 

vim /opt/activemq/conf/jetty.xml
  • Windows

$ACTIVEMQ/conf/jetty.xml

Adjust broker name and listening port

At the bottom, edit connector : 

<property name="connectors">
  <list>
     <bean id="Connector" class="org.eclipse.jetty.server.nio.SelectChannelConnector">
         <property name="port" value="8161" />
         <property name="host" value="0.0.0.0" />
      </bean>
    ...
  </list>
</property>


Change root context for Web-Console

Edit "jetty.xml" [look to the previous §]

Add 2 new securityConstraintMapping (line 40), " /activemq/*,/activemq-api/*, " 

<bean id="securityConstraintMapping" class="org.eclipse.jetty.security.ConstraintMapping">
      <property name="constraint" ref="securityConstraint" />
      <property name="pathSpec" value="/api/*,/activemq/*,/admin/*,*.jsp" />
 </bean>


Change:

  • WebAppContext.contextpath value to " /activemq " instead of " /admin "
  • WebAppContext.contextpath value to " /activemq-api " instead of " /api "
  <property name="handler">
     <bean id="sec" class="org.eclipse.jetty.server.handler.HandlerCollection">
         <property name="handlers">
             <list>
                 <bean class="org.eclipse.jetty.webapp.WebAppContext">
                    <!-- property name="contextPath" value="/admin" / -->
                    <property name="contextPath" value="/activemq" />
                    <property name="resourceBase" value="${activemq.home}/webapps/admin" />
                    <property name="logUrlOnStart" value="true" />
                 </bean>
                 ...
                 <bean class="org.eclipse.jetty.webapp.WebAppContext">
                     <property name="contextPath" value="/activemq-api" />
                     <property name="resourceBase" value="${activemq.home}/webapps/api" />
                     <property name="logUrlOnStart" value="true" />
                 </bean>
                 ...


Manage web-users

vim /opt/activemq/conf/jetty-realm.properties

Edit last line 

     admin: admin, admin


Apache 2 Virtual host and mod_proxy

Instead of using the port 8161, you can use Apache 2 mod_proxy.

!!CAREFUL!! You must let the HTTP access to the REST API.

Apache2 Virtual Host configuration: 

<VirtualHost *:80>
	ServerAdmin guillaume.diaz@vehco.com
	ServerName preprodrtd.vehco.com

	## Proxy
	ProxyVia On
        ProxyPreserveHost On
        <Proxy *>
             AddDefaultCharset off
             Order deny,allow
             Allow from all
	</Proxy>

	# Active MQ REST web-service, required for hawt.io management
	ProxyPass /activemq-api http://localhost:8161/activemq-api
	ProxyPassReverse /activemq-api http://localhost:8161/activemq-api 	

	# Redirect everything else to HTTPS
	Redirect permanent / https://preprodrtd.vehco.com/
</VirtualHost>

<VirtualHost *:443>
        ...        
	## Proxy
	ProxyVia On
        ProxyPreserveHost On
        <Proxy *>
             AddDefaultCharset off
             Order deny,allow
             Allow from all
             Satisfy Any
        </Proxy>


        # ActiveMq HTTP web-console
	ProxyPass /activemq http://localhost:8161/activemq
	ProxyPassReverse /activemq http://localhost:8161/activemq 	

        # ActiveMq REST web-services, required for hawt.io
	ProxyPass /activemq-api http://localhost:8161/activemq-api
	ProxyPassReverse /activemq-api http://localhost:8161/activemq-api
</VirtualHost>


Remote management using HAWT.IO

Hawt.io is a wonderful management tool. You can use it to manage a lot of JAVA services, including ActiveMQ ; JMX ; etc.


Official website: http://hawt.io/


To execute the program, just run: 

java -jar hawtio-app-1.3.1.jar --port 8090

Don't hesitate to adjust the port number to your own needs! Default is 8080, which might already been used by Tomcat or Glassfish.

Go to http://localhost:8090/hawtio


Then, configure the following remote connection:

Margins

Enjoy ActiveMQ !

Enable JMX remote management and monitoring

Official documentation: http://activemq.apache.org/jmx.html


Add JMX support

Edit configuration: 

vim /opt/activemq/conf/activemq.xml


Adjust the broker tag (line 35), add useJmx="true" 

<broker xmlns="http://activemq.apache.org/schema/core" useJmx="true" brokerName="preprodrtd.vehco.com" dataDirectory="${activemq.data}">
...
</broker>


Make sure that you're using a new JVM connector (line 65): 

<broker xmlns="http://activemq.apache.org/schema/core" useJmx="true" brokerName="preprodrtd.vehco.com" dataDirectory="${activemq.data}"> 
  ... 
  <managementContext>
     <managementContext createConnector="true" />
  </managementContext>
   ...
 </broker>


Create JMX users

  • User creation
vim /opt/activemq/conf/jmx.access

Add some users. As a reminder: 

userMq readonly
adminMq readwrite


  • User password
vim /opt/activemq/conf/jmx.password

Set passwords. Usernames must match! 

userMq abc123
adminMq abcd1234


JMX settings

Edit activemq launcher 

vim /opt/activemq/bin/activemq

Search for ACTIVEMQ_JMX and adjust the lines to: 

# ACTIVEMQ_SUNJMX_START="-Dcom.sun.management.jmxremote.port=11099 "
ACTIVEMQ_SUNJMX_START="-Dcom.sun.management.jmxremote.rmi.port=1099 "
ACTIVEMQ_SUNJMX_START="$ACTIVEMQ_SUNJMX_START -Dcom.sun.management.jmxremote.password.file=${ACTIVEMQ_CONF}/jmx.password"
ACTIVEMQ_SUNJMX_START="$ACTIVEMQ_SUNJMX_START -Dcom.sun.management.jmxremote.access.file=${ACTIVEMQ_CONF}/jmx.access"
ACTIVEMQ_SUNJMX_START="$ACTIVEMQ_SUNJMX_START -Dcom.sun.management.jmxremote.ssl=false"
ACTIVEMQ_SUNJMX_START="$ACTIVEMQ_SUNJMX_START -Dcom.sun.management.jmxremote"

!! Note that the default JVM RMI port will be used [TCP 1099] instead of the standalone one. !!


No you can access the console remotely using Jconsole or any other client.

URL: service:jmx:rmi:///jndi/rmi://<your hostname>:1099/jmxrmi


JMX client

Jconsole

You can use JConsole (included in Java JDK) to access the server.


ActiveMQ Browser (windows)

  • Unzip the file and put it in " /opt/activemq-browser "
  • just run the .bat file


Automatic installation

!! Depending on your distro, you might not have the web console !! This is NOT recommended.

Get binary

apt-get install activemq

Enable instance

  • Check instance
cd /etc/activemq/instances-enabled/
ls

... By default you should have an instance enable.

If not: 

ln -s /etc/activemq/instances-available/main /etc/activemq/instances-enabled/main
cp /usr/share/activemq/activemq-options /etc/activemq/instances-available/main/options
  • Edit settings
vim /etc/activemq/instances-available/main/options
  • Adjust $INSTANCE (use 'main')
ACTIVEMQ_BASE="/var/lib/activemq/main"

Create directories

mkdir -p /var/lib/activemq/main/data
mkdir -p /var/lib/activemq/main/data/kahadb                
chown -R activemq:activemq /var/lib/activemq/main
chmod -R 755 /var/lib/activemq/main

Kahadb == MQ embedded DB

Retrieved from "http://www.daxiongmao.eu/wiki/index.php?title=JMS_server:_ActiveMQ&oldid=716"