In Part 1 we covered how to deploy bitnami Cassandra image on vCenter servers. Now it’s time to configure the Cassandra database and vcloud director cell.
Configuration of Cassandra
- Open the firewall ports so the nodes can communicate with each other and also vCloud Cell with these nodes
[[email protected] ~]# firewall-cmd --zone public --add-port 7000/tcp --add-port 7001/tcp --add-port 7199/tcp --add-port 9042/tcp --add-port 9160/tcp --add-port 9142/tcp --permanent success [[email protected] ~]# firewall-cmd --reload success [[email protected] ~]$ firewall-cmd --list-ports 22/tcp 7000/tcp 7001/tcp 7199/tcp 9042/tcp 9160/tcp 9142/tcp
- We are going to make some configuration changes in Cassandra, so the first steps is to backup the original file: /opt/bitnami/cassandra/conf/cassandra.yaml
[[email protected] ~]$ cp /opt/bitnami/cassandra/conf/cassandra.yaml /opt/bitnami/cassandra/conf/cassandra.yaml.orig
- Configure Cassandra Cluster Name
#connect to cassandra using the credentials located in /home/bitnami/bitnami_credentials [[email protected] ~]$ cqlsh -u cassandra -p wKlsj8LGo5aR Connected to My Cluster at 127.0.0.1:9042. [cqlsh 5.0.1 | Cassandra 3.11.10 | CQL spec 3.4.4 | Native protocol v4] [email protected]> UPDATE system.local SET cluster_name = 'vCloud Cluster' where key='local'; [email protected]> exit
- For fine tuning of Cassandra, we are going to edit /opt/bitnami/cassandra/conf/cassandra.yaml as follow:
|Original Configuration||New parameter|
|cluster_name: ‘Test Cluster’||cluster_name: “vCloud Cluster”|
|seeds: “127.0.0.1”||seeds: “Your Seed Node 1 IP address, Your Seed Node 2 IP address”|
|listen_address: localhost||listen_address: “192.168.1.10” # Node IP address|
|rpc_address: localhost||rpc_address: 192.168.1.10 #This node IP address|
- Restart the Cassandra service
[[email protected] ~]$ /opt/bitnami/ctlscript.sh restart cassandra
- Check nodetool status and verify node is up and had joined cluster
[[email protected] ~]$ nodetool status Datacenter: datacenter1 ======================= Status=Up/Down |/ State=Normal/Leaving/Joining/Moving -- Address Load Tokens Owns (effective) Host ID Rack UN 192.168.1.10 267.12 KiB 256 100.0% 3c3ce428-a263-40e1-8cb9-d2867a32f5c9 rack1
Note: If you see any error, for example “nodetool: Failed to connect to ‘127.0.0.1:7199’ – ConnectException: ‘Connection refused (Connection refused)’. Explore the cassandra logs to identify the root cause. Cassandra logs path: /opt/bitnami/cassandra/logs/cassandra.log
- Cassandra Cluster: To add additional nodes to the Cassandra cluster, deploy 3 more Bitnami Cassandra virtual machines and repeat the above steps.
- We are not going to use superuser “cassandra”, so in this step we are creating a new superuser. Connect to the database cluster (from any node):
Connected to vCloud Cluster at 192.168.1.10:9042. [cqlsh 5.0.1 | Cassandra 3.11.10 | CQL spec 3.4.4 | Native protocol v4] Use HELP for help. CREATE ROLE vcloud WITH SUPERUSER = true AND LOGIN = true AND PASSWORD = 'YourSecurePassword';
Configure vCloud Director
The use of SSL with Cassandra is optional. In our case we decided not to enable SSL for Cassandra, so we included the configuration parameter
0 in the global.properties file on each cell ($VCLOUD_HOME/etc/global.properties)
- Login to vCloud Director cell and run the cell-management-tool utility to configure a connection between vCloud Director and the nodes in the Cassandra cluster. In this case metrics data is retained for 15 days.
[email protected] [ /opt/vmware/vcloud-director/bin ]# ./cell-management-tool cassandra --configure --create-schema --cluster-nodes "192.168.1.10,192.168.1.11,192.168.1.12,192.168.1.13" --username vcloud --password "YourSecurePassword" --ttl 15 --port 9042 Verifying Cassandra settings... Cassandra setting valid for node: 192.168.1.10 Cassandra setting valid for node: 192.168.1.11 Cassandra setting valid for node: 192.168.1.12 Cassandra setting valid for node: 192.168.1.13 Cassandra configuration settings verified successfully vcloud_metrics keyspace created... vm_metrics table created... adding configured metrics to the schema... adding counter: cpu.usage.average adding counter: cpu.usagemhz.average adding counter: cpu.usage.maximum adding counter: mem.usage.average adding counter: disk.provisioned.latest adding counter: disk.used.latest adding counter: disk.read.average adding counter: disk.write.average vapp_metrics table created... vdc_metrics table created... org_metrics table created... Persisting Cassandra settings... Success. The monitoring service is now configured to persist data into cassandra nodes(192.168.1.10,192.168.1.11,192.168.1.12,192.168.1.13), vCD cell(s) must be restarted if they are already running. [email protected] [ /opt/vmware/vcloud-director/bin ] service vmware-vcd restart
Once the cell is back online you are going to see the metrics in the virtual machines tab “Monitoring Chart”:
Default metrics are: disk.read.average, disk.provisioned.latest, cpu.usage.average, disk.write.average, cpu.usagemhz.average, mem.usage.average, cpu.usage.maximum, disk.used.latest.
The current metrics are directly retrieved from the VMware vCenter Server™ database via API calls, for that reason, there are ways to add more metric performance collectors if you need to.
Last updated: May 17, 2018
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