Apache Cassandra, or just Cassandra, is an open-source allotted database control gadget designed to maintain massive quantities of knowledge throughout many commodity servers, offering top availability with out a unmarried level of failure.
Every Cassandra node within the cluster could have the similar position. Data is sent around the cluster, which means that every node holds other knowledge. Also, it helps replication and multi-datacenter replication for redundancy, failover, and crisis restoration.
Here, we will be able to see methods to set up Apache Cassandra on Debian 11 / Debian 10.
Install Java
Update repository index.
sudo apt replace
Apache Cassandra calls for the most recent edition of Java 8. But, OpenJDK 8 isn’t to be had in Debian 11/10. Also, Cassandra 4.0 helps Java 11 (EXPERIMENTAL). So, we will be able to use OpenJDK 11 instead of OpenJDK 8.
# Debian 11 sudo apt set up -y openjdk-11-jre # Debian 10 sudo apt set up -y openjdk-8-jre
Check the Java edition put up the set up of OpenJDK.
java -version
You gets an identical output like underneath.
openjdk edition "11.0.12" 2021-07-20 OpenJDK Runtime Environment (construct 11.0.12+7-post-Debian-2) OpenJDK 64-Bit Server VM (construct 11.0.12+7-post-Debian-2, combined mode, sharing)
Add Apache Cassandra Repository
We will set up Cassandra the use of the legitimate Debian repository supplied by means of Apache Software Foundation.
First, upload the general public key of the Cassandra repository to the gadget.
sudo apt set up -y curl curl https://downloads.apache.org/cassandra/KEYS | sudo apt-key upload -
Add Cassandra repository on your gadget with the underneath command.
echo "deb https://downloads.apache.org/cassandra/debian 40x main" | sudo tee -a /and many others/apt/assets.record.d/cassandra.assets.record
Install Apache Cassandra on Debian
First, replace the repository index.
sudo apt replace
Then, set up Cassandra with the underneath command.
sudo apt set up -y cassandra
You can to find Cassandra’s configuration recordsdata in /and many others/cassandra and the logs and information are in /var/log/cassandra/ and /var/lib/cassandra, respectively.
Ensure Cassandra is up and operating with the underneath command.
sudo systemctl standing cassandra
You gets an identical output like underneath.
● cassandra.carrier - LSB: allotted garage gadget for structured knowledge Loaded: loaded (/and many others/init.d/cassandra; generated) Active: energetic (operating) since Sat 2021-08-28 12:22:57 CDT; 21min in the past Docs: guy:systemd-sysv-generator(8) Process: 5336 ExecStart=/and many others/init.d/cassandra get started (code=exited, standing=0/SUCCESS) Tasks: 69 (prohibit: 2321) Memory: 1.3G CPU: 1min 7.794s CGroup: /gadget.slice/cassandra.carrier └─5461 java -ea -da:web.openhft... -XX:+UseThreadPriorities -XX:+HeapDumpOnOutOfMemoryError -Xss256k -XX:+AlwaysPreTouch -XX:-UseBiasedLocking -XX:+UseTLA> Aug 28 12:22:57 debian11.holhol24.native systemd[1]: Starting LSB: allotted garage gadget for structured knowledge... Aug 28 12:22:57 debian11.holhol24.native systemd[1]: Started LSB: allotted garage gadget for structured knowledge.
Verify Apache Cassandra Cluster
Wait for a minute to let the cluster comes on-line. Then, you’ll be able to test the Cassandra cluster by means of executing the underneath command.
sudo nodetool standing
The underneath output confirms that the Cassandra cluster is up and operating.
Datacenter: datacenter1
=======================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
-- Address Load Tokens Owns (efficient) Host ID Rack
UN 127.0.0.1 69.05 KiB 16 100.0% fb0e8bf7-dcf4-41a6-96de-e8f230f1b797 rack1
Means,
U – Cluster is UP
N – Cluster is Normal
Connect to the Cassandra cluster the use of the cqlsh command.
cqlsh
You are actually attached to the cluster.
Connected to Test Cluster at 127.0.0.1:9042 [cqlsh 6.0.0 | Cassandra 4.0.0 | CQL spec 3.4.5 | Native protocol v5] Use HELP for lend a hand. cqlsh>
Conclusion
That’s All. I am hoping you realized methods to set up Apache Cassandra on Debian 11 / Debian 10. You can now cross forward and configure Apache Cassandra as in keeping with your requirement.
