In docker-compose we set the following volumes:
volumes:
- /var/kafka-data:/var/lib/kafka/data
So /var/kafka-data will mounted from /var/lib/kafka/data
Now we want to use ramdisk instead of mount between /var/lib/kafka/data to /var/kafka-data
The ramdisk command is like this
mount -t tmpfs -o size=100G ramdisk1 /var/kafka
the question is how to set the ramdisk cli in the docker-compose.yml instead of /var/kafka-data:/var/lib/kafka/data
The ramdisk command needs to be executed on the host and not in the docker container. Therefore, I would say add the tmpfs mount to the host /etc/fstab. same as shown below (example with tmpfs and ramdisk1)
tmpfs /var/kafka tmpfs uid=1001,gid=1001,size=10240m 0 0
ramdisk1 /data tmpfs nodev,nosuid,noexec,nodiratime,size=100G 0 0
execute mount -a or restart the node to mount the folder.
Update your docker-compose
volumes:
- /var/kafka:/var/lib/kafka/data