A local Critical Stack cluster can be setup using
cinder with one easy command:
$ cinder create cluster
This quickly creates a ready-to-use Kubernetes cluster running completely within a single Docker container.
Cinder, or Crit-in-Docker, can be useful for developing on Critial Stack clusters locally, or simply to learn more about Crit. You can read more about requirements, configuration, etc over in the Cinder Guide.
Setting up a production Kubernetes cluster requires quite a bit of planning and configuration. For one, there are many considerations that influence the way a cluster should be configured. When starting a new cluster or setting up a standard cluster configuration, one should consider the following:
- Where will it be running? (e.g. AWS, GCP, bare-metal, etc)
- What level of resiliency is required?
- This is about how the cluster can deal with faults and depending upon factors like colocation of etcd, how it fails can become more complicated.
- What will provide out-of-band storage for cluster secrets?
- This applies mostly to the initial cluster secrets, the Kubernetes and Etcd CA cert/key pairs.
- What kind of applications will run on the cluster?
- What cost-based factors are there?
- What discovery mechanisms are available for new nodes?
- Are there specific performance requirements that affect the infrastructure being used?
In particular, a few good places to start planning your Kubernetes cluster: