Install OpsCenter & Configure to existing Datastax Cassandra Cluster ( Part 3 )

-

                                                         



Follow the steps to install OpsCenter .Don't forget to signup in Datastax acadamey , which we will need during the installation process 


Step 1:  Add Datastax repository file

             sudo echo "deb https://login_email_Address:login_Password@debian.datastax.com/enterprise stable main" | sudo tee -a /etc/apt/sources.list.d/datastax.sources.list


Step 2:  Add the Datastax repository key

             sudo curl -L https://debian.datastax.com/debian/repo_key | sudo apt-key add -

Step 3:  Install the package
       
             sudo apt-get update
             sudo apt-get install opscenter



Step 4:  Start Opscenter
       
              sudo service opscenterd start


Step 5:  Browse Opscenter using below url

              http://hostaddress:8888/

Follow the step to  Configuring OpsCenter to existing Datastax Cassandra Cluster.

Step 1:  Update address.yaml located in your Cassandra cluster nodes.

             sudo echo "stomp_interface: <reachable_opscenterd_ip>" | sudo tee -a /var/lib/datastax-agent/conf/address.yaml

             sudo echo "use_ssl: 1" | sudo tee -a /var/lib/datastax-agent/conf/address.yaml


Step 2:  Start DataStax service 

             sudo service datastax-agent start

Comments

Post a comment

Popular posts from this blog

Datastax Error : Cassandra - Saved cluster name Test Cluster != configured name

-
Image
While changing existing cluster name in datastax, i got name mismatch exception in log file. Process i followed was changed the cluster name in cassandra.yaml configuration file. $ nano /etc/dse/cassandra/cassandra.yaml     cluster_name: 'Test Cluster1' Solution :  Change the cluster name  to "New Cluster Name" : $ cqlsh `hostname -I` cqlsh> UPDATE system.local SET cluster_name = 'New Cluster Name' where key='local'; cqlsh> exit; $ nodetool flush system Stop the cluster : $ sudo service dse stop;sudo service datastax-agent stop Edit the file : $ sudo vi /etc/dse/cassandra/cassandra.yaml     cluster_name: ' New Cluster Name ' Start the cluster : $ sudo service dse start;sudo service datastax-agent start Check Installation log :  $ cat /var/log/cassandra/output.log Reference  : https://support.datastax.com/hc/en-us/articles/205289825-Change-Cluster-Name-
Continue Reading »»»»

Datastax Error : Cannot start node if snitch's data center (dc1) differs from previous data center (dc2)

-
Image
This error occurs when the node try to start and see it has snitch information which differ from previous data center. In my case, i was using DseSimpleSnitch which name the datacenter based on workload type. Previously i had enabled solr in dse default configuration file ( /etc/default/dse ) and datasenter name was Solr. Now i tried to start the dse with graph enabled, which change the name to datacenter SearchGraph which is default workload type name. CassandraDaemon.java:698 - Cannot start node if snitch's data center (Solr) differs from previous data center (SearchGraph). Please fix the snitch configuration, decommission and rebootstrap this node or use the flag -Dcassandra.ignore_dc=true Solution : 1) In the last line of  cassandra-env.sh  set in the jvm opts as given below : JVM_OPTS="$JVM_OPTS -Dcassandra.ignore_dc=true" 2) If it starts successfully, execute: nodetool repair nodetool cleanup
Continue Reading »»»»

Configure Nagios plugin " check_logfiles " for scanning log file

-
I was checking for a nagios plugin which could filter the specified log file which i had mentioned and notify me whenever a warning or error appeared in log. Finally i get in hand check_logfile created by Gerhard Lausser. Check_logfiles is used to scan the lines of a file for regular expressions. Install the plugin on client system :  $ wget https://labs.consol.de/assets/downloads/nagios/check_logfiles-3.8.0.2.tar.gz $ tar xvzf check_logfiles-3.8.0.2.tar.gz $ cd check_logfiles-3.8.0.2/ $ ./configure $ make $ make install check_logfiles executable file will get installed on location "/usr/local/nagios/libexec" Configure Check Pattern : $ nano  /etc/nagios-plugins/config/check_log.cfg @searches = (   {     tag => 'Error',     logfile => '/var/logs/error.log',     criticalpatterns => 'Error',   } ); Here i am filtering pattern "Error" from log file which i had mentioned in logfile parameter section C
Continue Reading »»»»

Popular posts from this blog

Datastax Error : Cassandra - Saved cluster name Test Cluster != configured name

-
Image
While changing existing cluster name in datastax, i got name mismatch exception in log file. Process i followed was changed the cluster name in cassandra.yaml configuration file. $ nano /etc/dse/cassandra/cassandra.yaml     cluster_name: 'Test Cluster1' Solution :  Change the cluster name  to "New Cluster Name" : $ cqlsh `hostname -I` cqlsh> UPDATE system.local SET cluster_name = 'New Cluster Name' where key='local'; cqlsh> exit; $ nodetool flush system Stop the cluster : $ sudo service dse stop;sudo service datastax-agent stop Edit the file : $ sudo vi /etc/dse/cassandra/cassandra.yaml     cluster_name: ' New Cluster Name ' Start the cluster : $ sudo service dse start;sudo service datastax-agent start Check Installation log :  $ cat /var/log/cassandra/output.log Reference  : https://support.datastax.com/hc/en-us/articles/205289825-Change-Cluster-Name-
Continue Reading »»»»

Datastax Error : Cannot start node if snitch's data center (dc1) differs from previous data center (dc2)

-
Image
This error occurs when the node try to start and see it has snitch information which differ from previous data center. In my case, i was using DseSimpleSnitch which name the datacenter based on workload type. Previously i had enabled solr in dse default configuration file ( /etc/default/dse ) and datasenter name was Solr. Now i tried to start the dse with graph enabled, which change the name to datacenter SearchGraph which is default workload type name. CassandraDaemon.java:698 - Cannot start node if snitch's data center (Solr) differs from previous data center (SearchGraph). Please fix the snitch configuration, decommission and rebootstrap this node or use the flag -Dcassandra.ignore_dc=true Solution : 1) In the last line of  cassandra-env.sh  set in the jvm opts as given below : JVM_OPTS="$JVM_OPTS -Dcassandra.ignore_dc=true" 2) If it starts successfully, execute: nodetool repair nodetool cleanup
Continue Reading »»»»

Configure Nagios plugin " check_logfiles " for scanning log file

-
I was checking for a nagios plugin which could filter the specified log file which i had mentioned and notify me whenever a warning or error appeared in log. Finally i get in hand check_logfile created by Gerhard Lausser. Check_logfiles is used to scan the lines of a file for regular expressions. Install the plugin on client system :  $ wget https://labs.consol.de/assets/downloads/nagios/check_logfiles-3.8.0.2.tar.gz $ tar xvzf check_logfiles-3.8.0.2.tar.gz $ cd check_logfiles-3.8.0.2/ $ ./configure $ make $ make install check_logfiles executable file will get installed on location "/usr/local/nagios/libexec" Configure Check Pattern : $ nano  /etc/nagios-plugins/config/check_log.cfg @searches = (   {     tag => 'Error',     logfile => '/var/logs/error.log',     criticalpatterns => 'Error',   } ); Here i am filtering pattern "Error" from log file which i had mentioned in logfile parameter section C
Continue Reading »»»»