有rc在滚动升级之后,会造成服务访问中断,于是k8s引入了deployment资源
#创建deployment
#master节点：
cd k8s_yaml/
mkdir deploy
vim k8s_deploy.yaml
iapiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: nginx
spec:
replicas: 3
strategy:
rollingUpdate:
maxSurge: 1
maxUnavailable: 1
type: RollingUpdate
minReadySeconds: 30
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: 10.0.0.11:5000/nginx:1.13
ports:
- containerPort: 80
resources:
limits:
cpu: 100m
requests:
cpu: 100m
kubectl create -f k8s_deploy.yaml
kubectl expose deployment nginx --port=80 --type=NodePort
#测试
kubectl edit deployment
把nginx 1.13改为1.15测试升级
kubectl get svc
curl -I 10.0.0.12:30098
#node节点
wget http://192.168.18.251/file/docker_nginx1.13.tar.gz
docker load -i docker_nginx1.13.tar.gz
docker tag docker.io/nginx:1.13 10.0.0.11:5000/nginx:1.13
docker push 10.0.0.11:5000/nginx:1.13
wget http://192.168.18.251/file/docker_nginx1.15.tar.gz
docker load -i docker_nginx1.15.tar.gz
docker tag docker.io/nginx:latest 10.0.0.11:5000/nginx:1.15
docker push 10.0.0.11:5000/nginx:1.15
rc:
deployment:
相同点:都能保证有指定数量的pod，都是通过标签选择器关联pod
不同点:deployment滚动升级服务不中断，修改配置文件deployment立即生效，滚动升级的时候rc依赖配置文件
命令行创建deployment
kubectl run nginx --image=10.0.0.11:5000/nginx:1.13 --replicas=3 --record
--record:记录创建命令
--image:镜像地址
--replicas:副本数量
命令行升级版本
kubectl set image deployment nginx nginx=10.0.0.11:5000/nginx:1.15
kubectl set image 资源类型 资源名字 容器的名字=镜像的地址
查看deployment所有历史版本
kubectl rollout history deployment nginx
deployment回滚到上一个版本
kubectl rollout undo deployment nginx
deployment回滚到指定版本
kubectl rollout undo deployment nginx --to-revision=2
