manual scheduling
if scheduler is not exist, user can mannually schedule pods to nodes - in pod spec, set nodeName field to the name of the node - if the node is not exist, the pod will be in Pending state - bind request
taints and tolerations
taints: a taint is a key-value pair that is applied to a node
tolerations: a toleration is a key-value pair that is applied to a pod
not garantee that the pod will be scheduled to the node
node affinity
resource limits, requests
- resource limits: the maximum amount of resources that a container can use
- resource requests: the amount of resources that a container is guaranteed to have
- resource quotas: the maximum amount of resources that a namespace can use
- limit range: the minimum and maximum amount of resources that a container can use when it is created
static pod
- static pod is a pod that is created by the kubelet on a node
- if kube-api is available, the kubelet will create the mirror pod in the api server. that is read-only
or in /etc/kubernetes/manifests
multiple shedulers
configuring sheduler profile
: single sheduler, multi profile 