通过定义 maxsurge 和 maxUnavailable 来实现滚动升级的速度，滚动升级中，可以使用 kubectl rollout pause 来实现暂停。

[root@hdss7-200 deployment]# vim /data/k8s-yaml/base_resource/deployment/nginx-v1.14.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deploy
  namespace: app
spec:
  replicas: 5
  selector:
    matchLabels:
      app: nginx
      release: stable
      tier: slb
      partition: website
  strategy:
    rollingUpdate:
      # 以下两项，控制升级速度
      maxSurge: 1
      maxUnavailable: 0
  template:
    metadata:
      labels:
        app: nginx
        release: stable
        tier: slb
        partition: website
        # 修改版本
        version: v1.14
    spec:
      containers:
      - name: nginx-pod
        # 修改镜像版本
        image: harbor.od.com/public/nginx:v1.14
        lifecycle:
          postStart:
            exec:
              command:
                - /bin/bash
                - -c
                - "echo 'health check ok!' > /usr/share/nginx/html/health.html"
        readinessProbe: 
          initialDelaySeconds: 5
          httpGet:
            port: 80
            path: /health.html
        livenessProbe:
          initialDelaySeconds: 10
          periodSeconds: 5
          httpGet:
            port: 80
            path: /health.html

[root@hdss7-21 ~]# kubectl apply --filename=http://k8s-yaml.od.com/base_resource/deployment/nginx-v1.14.yaml --record=true
[root@hdss7-21 ~]# kubectl get rs -n app -l tier=slb -L version  # replicaset 数量增加
NAME                      DESIRED   CURRENT   READY   AGE    VERSION
nginx-deploy-5597c8b45    0         0         0       155m   v1.12
nginx-deploy-6bd88df699   0         0         0       154m   v1.13
nginx-deploy-7c5976dcd9   5         5         5       83s    v1.14
[root@hdss7-21 ~]# kubectl rollout history deployment nginx-deploy -n app # 升级记录
REVISION  CHANGE-CAUSE
1         kubectl apply --filename=http://k8s-yaml.od.com/base_resource/deployment/nginx-v1.12.yaml --record=true
2         kubectl apply --filename=http://k8s-yaml.od.com/base_resource/deployment/nginx-v1.13.yaml --record=true
3         kubectl apply --filename=http://k8s-yaml.od.com/base_resource/deployment/nginx-v1.14.yaml --record=true

[root@hdss7-21 ~]# kubectl get pod -n app -l partition=website -L version -w  # 逐个滚动升级
NAME                            READY   STATUS    RESTARTS   AGE    VERSION
nginx-deploy-6bd88df699-242fr   1/1     Running   0          152m   v1.13
nginx-deploy-6bd88df699-4kj8z   1/1     Running   0          152m   v1.13
nginx-deploy-6bd88df699-8j85n   1/1     Running   0          152m   v1.13
nginx-deploy-6bd88df699-8pmdg   1/1     Running   0          152m   v1.13
nginx-deploy-6bd88df699-n7x6n   1/1     Running   0          152m   v1.13
nginx-deploy-7c5976dcd9-ttlqx   0/1     Pending   0          0s     v1.14
nginx-deploy-7c5976dcd9-ttlqx   0/1     Pending   0          0s     v1.14
nginx-deploy-7c5976dcd9-ttlqx   0/1     ContainerCreating   0          0s     v1.14
nginx-deploy-7c5976dcd9-ttlqx   0/1     Running             0          1s     v1.14
nginx-deploy-7c5976dcd9-ttlqx   1/1     Running             0          9s     v1.14
nginx-deploy-6bd88df699-8pmdg   1/1     Terminating         0          153m   v1.13
......