https://www.atlassian.com/microservices/microservices-architecture/kubernetes-vs-docker
1st hit on google
Need more automation across multiple clusters? -> Kubernetes
Docker and Kubernetes aren’t “either/or” competitors – they’re two technologies which complement each other.
Docker is a company which provides a set of tools for building and sharing container images, and running containers at both small and large scale.
Kubernetes is a tool which manages (“orchestrates”) container-based applications running on a cluster of servers.
You can use Docker without Kubernetes… and you can use Kubernetes without Docker.
As containers grew in popularity and used diversified orchestrators such as Kubernetes (and its derivatives, such as OpenShift), Mesos, and Docker Swarm, it became increasingly important to deploy and operate containers at scale.
Why its not Docker:
https://xsoar.pan.dev/docs/integrations/docker
Docker is a tool used by developers to package together dependencies into a single container (or image). What this means for you is that in order to use your integration, you are not required to "pip install" all of the packages required. They are part of a container that "docks" to the server and contains all of the libraries you need. To learn more about docker, visit their site here
Why it is Kubernetes
pg. 102 of new study guide
CN-Series is the container native version of the ML-powered Next-Generation Firewall (NGFW)
that is designed specifically for Kubernetes environments. CN-Series container firewalls help
network security teams safeguard developers with deep security integration into Kubernetes
orchestration. Deploy the CN-Series to secure traffic between pods in different trust zones and
namespaces, for protection against known and zero-day malware, and to block data exfiltration
from your containerized environments.
The key part here is the fact that the question asks about 'clusters' of containers. Docker Swarm does that but docker itself wouldn't fall under that by itself.
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