Building Cassandra container

Cassandra provides the primary data persistence layer for Teamwork Cloud.

Building Cassandra image

To build a Cassandra image

Create the following files:

cassandra/Dockerfile

FROM cassandra:5.0.5

# 1. Fix JVM 17 Logging (Added double-colon before file rotation options)
RUN echo "-Xlog:gc=info,heap*=info:file=/var/log/cassandra/gc.log::filecount=10,filesize=10485760" >> /etc/cassandra/jvm17-server.options

# 2. Fix "HEAP_NEWSIZE “
RUN sed -i 's/^HEAP_NEWSIZE=.*/#HEAP_NEWSIZE=/' /etc/cassandra/cassandra-env.sh

# 3. Optional configuration tuning
RUN sed -i -e 's/^#commitlog_segment_size:.*/commitlog_segment_size: 192MiB/' \
           /etc/cassandra/cassandra.yaml

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cassandra/docker-compose.yml

Change mem_limit,MAX_HEAP_SIZE,HEAP_NEWSIZE as needed.

version: '2.4'
services:
  cassandra:
    build: .
    container_name: cassandra
    image: localhost/twc_cassandra:latest
    mem_limit: 2g
    ports:
      - "9042:9042"
      - "9160:9160"
    environment:
      - CASSANDRA_SEEDS=cassandra
      - CASSANDRA_LISTEN_ADDRESS=cassandra
      - MAX_HEAP_SIZE=1000M
      - HEAP_NEWSIZE=100M
    volumes:
      - ../data/cassandra/cassandra_data:/var/lib/cassandra
      - ../data/cassandra/cassandra_logs:/var/log/cassandra
    networks:
      - twc-net
    healthcheck:
      test: ["CMD", "cqlsh", "-e", "describe keyspaces"]
      interval: 5s
      timeout: 5s
      retries: 60
networks:
  twc-net:
    external: true

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Build the image by running the following command:
```
docker compose build --no-cache cassandra
```
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Start Cassandra by running the following command within the Cassandra folder:
```
docker compose up -d
```
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Run a health check by executing the following command to check if Cassandra is operational:

docker exec -it cassandra  bash -c 'cqlsh -e "describe keyspaces" && nodetool status && nodetool version'

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