Tomcat-Static-Unicast-Clustering

Tomcat needs to be configured to allow for setup of cluster of two nodes over unicast. Following is section of my ${LIFERAY_HOME}/tomcat-6.0.32/conf/server.xml on server1 (replace node1 with node2 and swap location of IP_ADDRESSES and change unique_id to anything 16 bit long other than{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2}, on server.xml in server2) which allowed for this. IP_ADDRESSES here refer to private ip addresses of server1 and server2 respectively.

================================

<Engine name="Catalina" defaultHost="localhost" jvmRoute="node1">

<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="6" channelStartOptions="3">

<Manager className="org.apache.catalina.ha.session.DeltaManager" expireSessionsOnShutdown="false" notifyListenersOnReplication="true" />

<Channel className="org.apache.catalina.tribes.group.GroupChannel">

<Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver"
autoBind="0" selectorTimeout="5000" maxThreads="6"
address="IP_ADDRESS_SERVER1" port="4444" />
<Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
<Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"
timeout="60000"
keepAliveTime="10"
keepAliveCount="0"
/>
</Sender>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpPingInterceptor" staticOnly="true"/>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.StaticMembershipInterceptor">
<Member className="org.apache.catalina.tribes.membership.StaticMember"
host="IP_ADDRESS_SERVER2"
port="4444"
uniqueId="{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2}"/>
</Interceptor>
</Channel>
<Valve className="org.apache.catalina.ha.tcp.ReplicationValve" filter="" />
<Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve" />
<ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/>
<ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
</Cluster>

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Extend a root volume in the Aws

To extend a root volume in the Aws we first need to take a snap shot of the correct volume and the create a new volume of the needed size from the snapshot. Checking the size of the Current partition. We can see that the current size is 10Gb.

First find the correct instance ID



Check the volume section and find out which all volume are attached to the Correct instance. Check and note the volume instance and find the mount path as we need to mount the new volume to same mount path.    

  Select the Correct Volume and create a snapshot of that Volume. Right Click and select the option to create a snapshot.



Enter the snapshot name and description to create a snapshot.



Snapshot Created.



    Now select the snap shot option in the right menu and choose the correct snapshot which needs to be extended and Right click to create the new volume.

  

Select the Needed Size , type of storage etc

    

Once the Volume in created you can see it in the Volume Panel in available model.

   

Stop the instance in which the Volume is mounted

  

  Select the Volume panel  and Unmount the  initial Volume which is of small size by right click the old volume.

 

Once the volume ins unmounted both the Volumes will be in available state. Now right click on the new volume and attach it into the instance.

  

  Enter the instance to which the volume should be added and also the device path which we have save before.

 

Make sure you enter the device path correctly as we have noted down before.  




Once mounted make sure that the instance ID, Volume ID and device path are correct.

  

Once its all set start the instance and check the size. In some cases we need to run resize2fs to make the size of the volume extent.

    

In windows you can resize it from the disk management option.      

S3cmd : Used to copy files to s3 bucket from server. AWS

S3cmd : AWS command used to copy/Sync content to S3 bucket

s3cmd can be installed from epel repo or by manually compiling the code.

While installing from epel there could be dependency issue for the python.
while using epel repo we need the python version 2.4 in the server if you are having another version of python its better to go with the manual installation.

## RHEL/CentOS 6 32-Bit ##
# wget http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
# rpm -ivh epel-release-6-8.noarch.rpm

## RHEL/CentOS 6 64-Bit ##
# wget http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
# rpm -ivh epel-release-6-8.noarch.rpm

yum install s3cmd

For manual installation Download the tar file from

http://sourceforge.net/projects/s3tools/files/s3cmd/

get the tar file of the needed version .
make sure you have a python version > than 2.4 installed in the server.

untar the file using tar zxvf or zjvf as per the need and use python to run the installation script

python setup.py install

..

Configuring/Reconfiguring the s3cmd command

s3cmd --configure

Enter new values or accept defaults in brackets with Enter.
Refer to user manual for detailed description of all options.

Access key and Secret key are your identifiers for Amazon S3
Access Key: xxxxxxxxxxxxxxxxxxxxxx
Secret Key: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Encryption password is used to protect your files from reading
by unauthorized persons while in transfer to S3
Encryption password: xxxxxxxxxx
Path to GPG program [/usr/bin/gpg]:

When using secure HTTPS protocol all communication with Amazon S3
servers is protected from 3rd party eavesdropping. This method is
slower than plain HTTP and can't be used if you're behind a proxy
Use HTTPS protocol [No]: Yes

New settings:
Access Key: xxxxxxxxxxxxxxxxxxxxxx
Secret Key: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Encryption password: xxxxxxxxxx
Path to GPG program: /usr/bin/gpg
Use HTTPS protocol: True
HTTP Proxy server name:
HTTP Proxy server port: 0

Test access with supplied credentials? [Y/n] Y
Please wait, attempting to list all buckets...
Success. Your access key and secret key worked fine :-)

Now verifying that encryption works...
Success. Encryption and decryption worked fine :-)

Save settings? [y/N] y
Configuration saved to '/root/.s3cfg'

 

# s3cmd mb s3://test
Bucket 's3://test/' created

# s3cmd ls s3://test/

Upload a file
# s3cmd put file.txt s3://test/

Upload Similar files
# s3cmd put *.txt s3://test/

Uploading complete Directory
# s3cmd put -r upload-dir s3://test/
Upload files in a directory
# s3cmd put -r upload-dir/ s3://test/

Get a file
# s3cmd get s3://test/file.txt

Removing file from s3 bucket
# s3cmd del s3://test/file.txt
File s3://test/file.txt deleted

Removing directory from s3 bucket
# s3cmd del s3://test/backup
File s3://test/backup deleted
Sync direcotry .
# s3cmd sync ./back s3://test/back

attributes that can be used with Sync
--delete-removed :-remove files that are removed from the local directory .
--skip-existing :-Don't sync the files already synced.

—exclude / —include — standard shell-style wildcards, enclose them into apostrophes to avoid their expansion by the shell. For example --exclude&nbsp;'x*.jpg' will match x12345.jpg but not abcdef.jpg.
—rexclude / —rinclude — regular expression version of the above. Much more powerful way to create match patterns. I realise most users have no clue about RegExps, which is sad. Anyway, if you’re one of them and can get by with shell style wildcards just use —exclude/—include and don’t worry about —rexclude/—rinclude. Or read some tutorial on RegExps, such a knowledge will come handy one day, I promise ;-)
—exclude-from / —rexclude-from / —(r)include-from — Instead of having to supply all the patterns on the command line, write them into a file and pass that file’s name as a parameter to one of these options. For instance --exclude '*.jpg' --exclude '*.gif' is the same as --