// Aula 21 - DeamonSets

https://kubernetes.io/docs/concepts/workloads/controllers/daemonset/

# vim fluentd.yaml

# fluentd.yaml

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: fluentd
  labels:
    app: fluentd
spec:
  selector:
    matchLabels:
      name: fluentd
  template:
    metadata:
      labels:
        name: fluentd
    spec:
      containers:
      - name: fluentd
        image: fluent/fluentd:v0.14.10
        resources:
          limits:
            memory: 200Mi
          requests:
            cpu: 100m
            memory: 200Mi
        volumeMounts:
        - name: varlog
          mountPath: /var/log
        - name: varlibdockercontainers
          mountPath: /var/lib/docker/containers
          readOnly: true
      terminationGracePeriodSeconds: 30
      volumes:
      - name: varlog
        hostPath:
          path: /var/log
      - name: varlibdockercontainers
        hostPath:
          path: /var/lib/docker/containers

# kubectl get daemonset

# kubectl apply -f fluentd.yaml

# kubectl describe daemonset fluentd

# kubectl get pods -o wide

# kubectl get nodes

# kubectl get pods -o wide

# kubectl label nodes k8s-slave-2 ssd=true

# kubectl get nodes

# kubectl get nodes --selector ssd=true

# vim nginx-ssd.yaml

# nginx-ssd.yaml

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: nginx
  labels:
    app: nginx
    ssd: "true"
spec:
  selector:
    matchLabels:
      name: nginx
  template:
    metadata:
      labels:
        name: nginx
        ssd: "true"
    spec:
      nodeSelector:
        ssd: "true"
      containers:
      - name: nginx
        image: nginx:1.10.0

# kubectl apply -f nginx-ssd.yaml

# kubectl describe daemonset nginx

# kubectl get pods -o wide --selector=ssd=true

# kubectl delete -f fluentd.yaml

# kubectl delete -f nginx-ssd.yaml

# kubectl label nodes k8s-slave-2 ssd-

# kubectl get nodes --show-labels