K
Q

Recommendations to run a Java SE container application on Kubernetes

11/12/2019

I have a Java SE application which is nothing but a Kafka consumer. It is not exposing any REST endpoint but it polls data from Kafka topic and pushes to Elastic Search. This SE application is docker containerized and we need to run this to Kubernetes.

  1. What are the recommendations for running java SE application on Kubernetes?
  2. Any sample deployment yaml file for this requirement?
-- Deepak Vijayan
kubernetes

Similar Questions

AWS Application Load Balancer - escape path pattern character
dynamic ingress to Kubernetes services with nginx proxy
kubeadm init behind enterprise proxy
How to create an IAM role and associate it with the service account for a Kubernetes pod in the same manifest file?
unable to resize Postgres 10 /dev/shm due to kubernetes limiting shared memory
terraform plan throws error from kubernetes provider if the cluster was not created yet
Docker login on ECR fails with 400 Bad Request on Powershell from Jenkins

1 Answer

11/12/2019

Some recommendations based on own experience, at my company all of our stuff is java and kafka based.

Java
1. You don't need a kubernetes service (obviously since you don't expose a server).
2. Set Heap Size limits by making sure the container can read an environment variable for XMS and XMS.
3. Set spec.resources.limits.[] and spec.resources.requests.[] to values above XMX and XMS. Your container might need some extra resources for other operations.
Kafka
4. Make sure to have a static consumer group. So if you scale your application, it does not produce rebalances.
5. Create a variable to configure number of consumers per consumergroup. You can tune throughput with it.

-- Rodrigo Loza
Source: StackOverflow