arunsah.github.io

Cassandra in Docker

📅 2020-05-01 🖊️ @arunsah 🧭 Pune, India

Creating Network

// create network
docker network create cassandra-net
docker network rm cassandra-net
docker network ls

Cassandra Nodes

// first node
docker run -p 9042:9042 --name cassandra-container1 --network cassandra-net -d cassandra:3

// follow up node
docker run -p 9042:9042 --name cassandra-container2 -d --network cassandra-net -e CASSANDRA_SEEDS=cassandra-container1 cassandra:3

docker run -p 9042:9042 --name cassandra-container3 -d --network cassandra-net -e CASSANDRA_SEEDS=cassandra-container1 cassandra:3

docker run -p 9042:9042 --name cassandra-container4 -d --network cassandra-net -e CASSANDRA_SEEDS=cassandra-container1 cassandra:3

// start another container for running clash
docker run -it --network cassandra-net --rm Cassandra-cli cqlsh cassandra-container

Nodes List

# nodetool status
Datacenter: datacenter1
=======================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address     Load       Tokens       Owns (effective)  Host ID                               Rack
UN  172.18.0.2  126.95 KiB  256          63.1%             d32f69f6-8277-45a8-9d63-32b0ed7246cf  rack1
UN  172.18.0.3  143.2 KiB  256          67.2%             649c9c40-f239-4b05-ac68-cbda22dfb6d4  rack1
UN  172.18.0.5  156.64 KiB  256          69.7%             1a59c286-ad02-4afc-baac-aee8187f7414  rack1

// [scripting - What is the best way to get a list of nodes that belong to a Cassandra cluster? - Server Fault](https://serverfault.com/a/718475)

# nodetool status | awk '/^(U|D)(N|L|J|M)/{print $2}'
172.18.0.2
172.18.0.3
172.18.0.5
#

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