kuke-scheduler负责pod的调度
实际情况中，我们可以自己指定到一些node上

1、RC、Deployment：全自动调度

1.1 nodeSelector

通过给node们设置标签，然后在pod的yaml文件中精确匹配，如果该node未能精确匹配到，则无法调度到

kubectl label node izm5e4q7wqqi371ly7w5f6z location=north

apiVersion: v1
kind: ReplicationController 
metadata:
  name: redis-master
  labels:
    name: redis-master 
spec:
  replicas: 3
  selector:
    name: redis-master
  template:
    metadata:
      labels:
        name: redis-master
    spec:
      containers:
      - name: master
        image: kubeguide/redis-master
        ports:
        - containerPort: 6379
      nodeSelector:
        location: north

1.2 nodeAffnity

亲和性调度，可以用in、notIn、Exists、DoesNotExists、Gt、Lt等操作符来匹配，更灵活

2、DaemonSet调度

DaemonSet是k8s在1.2新增的一种资源对象，用于管理集群中每个node仅运行一份pod副本

apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: fluentd-cloud-logging
  namespace: kube-system
  labels:
    k8s-app: fluentd-cloud-logging
spec:
  template:
    metadata:
      namespace: kube-system
      labels:
        k8s-app: fluentd-cloud-logging
    spec:
      containers:
      - name: fluentd-cloud-logging
        image: gcr.io/google_containers/fluentd-elasticsearch:1.17
        resources:
          limits:
            cpu: 100m
            memory: 200Mi
        env:
        - name: FLUENTD_ARGS
          value: -q
        volumeMounts:
        - name: varlog
          mountPath: /var/log
          readOnly: false
        - name: containers
          mountPath: /var/lib/docker/containers
          readOnly: false
      volumes:
      - name: containers
        hostPath:
          path: /var/lib/docker/containers
      - name: varlog
        hostPath:
          path: /var/log

# 查看daemonset， 要指定namespace
 kubectl get daemonset --namespace=kube-system
# 查看pods，要指定namespace
kubectl get po --namespace=kube-system

3、job调度

。。