I'm very new to the infrastructure so I built a simple monolith application and I use docker for building a container and deploy it on my linux server. My question is, do I need to install kubernetes for a single container and if no how can I scale or do the load balancing.
1 Answers
"... do I need to install kubernetes for a single container" - No, it is not mandatory. One can use docker to manage applications. Kubernetes is a platform that can be used to orchestrate containerized applications. It offers tools and concepts like autoscaling based on load, isolation through namespaces, network access management through services and ingresses, and much more. But Kubernetes is not the only platform for orchestration. There are others, for example OpenShift, docker swarm, rancher. All those are optional platforms with additional tooling and concepts that can be used if necessary.
"how can I scale or do the load balancing." - We can, for example, define the replicas through the replicas variable in a docker-compose file. All containers defined under a service are accessed through this service's name. How exactly the balancing is done can also be configured through the endpoint_mode configuration. If we need even more control, we can deploy a separate load balancer, e.g. nginx. A possible configuration is described in this medium article.
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