问题
I'm trying to i) troubleshoot a simple onyx-kafka job not writing to a topic. More details are given here. And you can try it out in this sample project. I think the reason is because there's only one kafka node.
So I tried ii) launching kafka confluentinc/cp-kafka:3.3.1
(with zookeeper confluentinc/cp-zookeeper:3.3.1
) running docker (17.09.0-ce, build afdb6d4) in swarm mode. But then I get this error.
Warning: space is running low in /dev/shm (shm) threshold=167,772,160 usable=58,716,160
A) With docker compose, I could just configure the mounted /dev/shm
disk to have more capacity with the configuration option shm_size: 1G
(see here).
Is there an equivalent for docker swarm? I just need to control the size of the disk volume. But I don’t see such an option in docker compose’s deploy
configuration (see here). And the docker service --mount
option doesn't seem to solve the problem. Any options here?
B) I don't quite grok the Memory
volume mount described here. So don't know if that's a workable option.
C) Thanks to Andrew Mulholland (@itwasntandy) from the devops-engineers
Slack channel, I can fake it by passing in --mount type=tmpfs,dst=/dev/shm,tmpfs-size=768000000
as options to a call to docker service create ...
(see here).
But the offical documentation says that the tmpfs option is not supported for docker stack deploy
. This optiononly applies to docker compose's service configuration. It doesn't apply to docker's swarm mode.
Summary. So is there any way to get that option into my existing docker-compose.yml file, in the swarm configuration?
I’d love to be able to run docker stack deploy --compose-file docker-compose.yml my-app
. Details are here. Sample project is here. Ultimately, I want to:
- i) run a docker stack, with a service which has onyx-kafka write to a topic (see here). And for that, I think I need to...
- ii) launch docker (17.09.0-ce, build afdb6d4) in swarm mode, with the images kafka
confluentinc/cp-kafka:3.3.1
(with zookeeperconfluentinc/cp-zookeeper:3.3.1
). But I'm running into this memory error issue.
来源:https://stackoverflow.com/questions/47401805/troubleshooting-onyx-kafka-not-writing-to-a-topic-howto-run-kafka-in-docker-swa